Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Posts by Tag
HADOOP
access-filter
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
active-directory
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
ad
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
ansible
Google Compute Engine (GCE) Instance with Ansible
Using Ansible within the initialization script of a Google Compute Engine (GCE) instance can streamline and automate the configuration and setup of your virt...
Installing ansible on RHEL 6.6.
Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchest...
Ansible Playbook - Setup Zookeeper Using tarball.
This is a simple zookeeper playbook, to quickly start zookeeper running on a single or more nodes, in a clustered mode.
Ansible Playbook - Setup Storm Cluster.
This is a simple Storm Cluster Setup. We are using a dedicated Zookeeper Cluster/Node, instead of the standalone zkserver. Below is how we will deploy our c...
Ansible Playbook - Setup Kafka Cluster.
This is a simple Kafka setup. In this setup we are running kafka over a dedicated zookeeper service. (NOT the standalone zookeeper which comes with kafka)
Ansible Playbook - Setup Hadoop CDH5 Using tarball.
Setting up Hadoop using Ansible, we will be using cdh5 tarball for installation of the cluster.
auth
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
authentication
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
authorization
Enable Authorization on HBase.
Enable Authorization on HBase.
backup
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
bi
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
bigquery
Exploring Data Extraction from BigQuery
BigQuery, Google’s fully-managed and serverless data warehouse, empowers organizations to analyze massive datasets with remarkable speed and efficiency. But ...
10 Tips for Optimizing Your Queries and Reducing Costs in BigQuery
Google BigQuery is a powerful and cost-effective data warehouse that enables you to analyze massive datasets quickly. However, to get the most out of BigQuer...
cassandra
Creating a Multi-node Cassandra Cluster on Centos 6.5.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and pr...
cdh
Cloudera Hadoop Deployment using Cloudera Manager Cookbook [CentOS 6.6]
This cookbook [currently as of now] can be used to setup a Cloudera Manager Server (Management Server) running on MySQL/Postgres database. But the intended u...
centos
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
Encrypted Data Bags - Chef
Data Bags are a way to store information on the chef-server which all the cookbooks can access. Few more additional advantages are that we can encrypt the da...
knife Quick Reference
This is a quick reference for few of the commands which I use often.
Remove Old Files using find Command
GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of preceden...
Moving RRD file from 32bit to 64bit Architecture
When we were working on a nagios monitoring system we were migrating from a 32bit nagios to a 64bit Architecture. Most of the graphs are not working as the R...
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
Standalone Chef Server / Workstation / Client Setup on CentOS 6
The standalone installation of Chef server creates a working installation on a single server. This installation is also useful when you are installing Chef s...
Creating Documents Using pandoc
Pandoc is an opensource utility to create documents from markdown. We can create PDF, Doc, doc, html and other formats. And can be also used to convert html ...
Setup/Configuration Nagios XI on Centos6.6
Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a f...
RPM Command Cheat Sheet
RPM (Redhat Package Manager) is the most popular package utility and is used mostly on RHEL, Centos and Fedora. RPM helps user/admins to build, install, que...
Creating a large file in Windows / Linux
Was working on a monitoring project, need to create a large file to test notifications. Here is how we can do that.
Cloudera Hadoop Deployment using Cloudera Manager Cookbook [CentOS 6.6]
This cookbook [currently as of now] can be used to setup a Cloudera Manager Server (Management Server) running on MySQL/Postgres database. But the intended u...
Check Port on Remote Server CentOS 6.6/RHEL 6
Checking port available on a remote machine using nc command instead of telnet. Same command can be used to check on a remote server as well, change the 127....
LUKS Disk encryption for CentOS 6.6/RHEL 6
Linux Unified Key Setup-on-disk-format (or LUKS) allows you to encrypt partitions on your Linux computer. This is particularly important when it comes to mo...
Mysql Database Moving Data Directory to New Location.
How to move an existing data directory in mysql to a new location. We were running out of space and had to move the existing data directory to a new drive. B...
Mysql Database Disk Usage.
We were running out of disk space on one of the databases server, we need to get information on what the current table/database usage was. Below are few comm...
Installing python 2.7.x on Centos 6.5/6.6
By default centos comes with python 2.6. In most of the cases we might need python 2.7 or later to be installed. Below are few ways to install python 2.7 on ...
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Setting up SNMP Trapper for Zabbix.
Receiving SNMP traps is the opposite to querying SNMP-enabled devices. In this case the information is sent from a SNMP-enabled device and is collected or “t...
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Installing ansible on RHEL 6.6.
Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchest...
Creating a passwordless entry on Centos 6.5.
You can enter a linux system without entring a password using below steps. We will be creating a ssh jey which will be share between the servers, which will ...
Creating a Multi-node Cassandra Cluster on Centos 6.5.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and pr...
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Installing NodeJS on Centos 6.6.
Node.js is an open-source, cross-platform runtime environment for developing server-side web applications. Node.js applications are written in JavaScript and...
Simple Script to create a user on centos 6.5
Default passwd is set as username@123 As we are setting the chage, user needs to change the passwd on first login.
Zabbix Installation 2.4 - CentOS 6.5
Zabbix is the ultimate enterprise-level software designed for monitoring availability and performance of IT infrastructure components. Zabbix is open source ...
chef
Chef Kitchen Test Deployment on Multiple Nodes with Private Interface.
What is Kitchen? Kitchen provides a test harness to execute infrastructure code on one or more platforms in isolation.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
Windows Testing Using Kitchen Chef
Kitchen-Vagrant has the capability to spin up a windows instance for testing. To make it work you will need the vagrant-winrm to be installted on the worksta...
Encrypted Data Bags - Chef
Data Bags are a way to store information on the chef-server which all the cookbooks can access. Few more additional advantages are that we can encrypt the da...
Bootstrap Windows - knife-windows - Chef
knife-windows plugin adds additional functionality to the Chef Knife CLI tool for configuring / interacting with nodes running Microsoft Windows.
Standalone Chef Server / Workstation / Client Setup on CentOS 6
The standalone installation of Chef server creates a working installation on a single server. This installation is also useful when you are installing Chef s...
Cloudera Hadoop Deployment using Cloudera Manager Cookbook [CentOS 6.6]
This cookbook [currently as of now] can be used to setup a Cloudera Manager Server (Management Server) running on MySQL/Postgres database. But the intended u...
Chef Workstation Setup on Windows Machine.
The Chef Development Kit (ChefDK) brings the best-of-breed development tools built by the awesome Chef community to your workstation with just a few clicks. ...
chef-client
Bootstrap Windows - knife-windows - Chef
knife-windows plugin adds additional functionality to the Chef Knife CLI tool for configuring / interacting with nodes running Microsoft Windows.
chefdk
Standalone Chef Server / Workstation / Client Setup on CentOS 6
The standalone installation of Chef server creates a working installation on a single server. This installation is also useful when you are installing Chef s...
Cloudera Hadoop Deployment using Cloudera Manager Cookbook [CentOS 6.6]
This cookbook [currently as of now] can be used to setup a Cloudera Manager Server (Management Server) running on MySQL/Postgres database. But the intended u...
Chef Workstation Setup on Windows Machine.
The Chef Development Kit (ChefDK) brings the best-of-breed development tools built by the awesome Chef community to your workstation with just a few clicks. ...
cloud
Cloud VPN - GCP Learning Notes.
Cloud VPN securely connects your peer network to your Virtual Private Cloud (VPC) network through an IPsec VPN connection.
Cloud Monitoring - Stackdriver - GCP Learning Notes.
Stackdriver driver provides monitoring, logging, error reporting, tracing and debugging services. Currently known as Google Cloud’s operations suite.
Cloud Databases - SQL/Spanner/Firestore/BigTable/Memorystore - GCP Learning Notes.
Cloud SQL is a fully managed service which includes MySQL, PostgreSQL, Microsoft SQL Server. And for horizontal scalability, consider using Cloud Spanner.
Cloud IAM - GCP Learning Notes.
Google Cloud offers IAM, which lets you give more granular access to specific Google Cloud resources and prevents unwanted access to other resources.
Cloud Storge Bucket - GCP Learning Notes.
Cloud Storage is Google Cloud’s object storage service, and it allows worldwide storage and retrieval of any amount of data at anytime.
cloudera
Long Running Jobs in YARN distcp.
Usually distcp and other batch jobs run for a very long time. This is fine if you are running a HADOOP environment without kerberos. When we kerberize a clus...
Bulk Upload Hfiles doBulkLoad - LoadIncrementalHfiles failed. This is recoverable. Hbase Encryption Zone.
We were working with a team who were uploading data into HBASE using the doBulkLoad, also we had moved the /hbase to encryption zone. The issue started after...
Checking HDFS health using fsck.
When we have large data sets on the cluster, there will be corruptions of blocks. This could be due to disk or any other.
HDFS Block Corrupted - HBase Error Could not seek StoreFileScanner Invalid HFile block magic
We ran into an issue which was causing HBase to fail. When the job was rerun then it would work again. In the logs we got 2 errors.
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Enable Kerberos Using Cloudera API.
Python API for cloudera is really nice, apart from getting the cluster setup, we can also do configuration and automation. We use a lot of automation using C...
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting Up Zookeeper Services Using Cloudera API [Part 2]
This is the second follow up post. In the earlier post Setting Up Cloudera Manager Services Using Cloudera API [Part 1] we install the cloudera management se...
Setting Up Cloudera Manager Services Using Cloudera API [Part 1]
Cloudera API is a very convenient way to setup a cluster and do more.
Getting Started with Cloudera API
This is a basic steps to get connected with cloudera manager.
Basic Testing On Hadoop Environment [Cloudera]
These are a set of testing which we can do on a Hadoop environment. These are basic testing to make sure the environment is setup correctly.
Setting Hue to Listen on 0.0.0.0 [Cloudera]
We were working on setting up a cluster, but the Hue URL was set to a private IP of the server. As we had setup all the nodes to access each other using a pr...
Update Cloudera Manager to specific version [5.4.5]
Upgrading Cloudera Manager 5 to the Latest Cloudera Manager, In most cases it is possible to complete the following upgrade without shutting down most CDH se...
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
cloudera-api
Enable Kerberos Using Cloudera API.
Python API for cloudera is really nice, apart from getting the cluster setup, we can also do configuration and automation. We use a lot of automation using C...
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting Up Zookeeper Services Using Cloudera API [Part 2]
This is the second follow up post. In the earlier post Setting Up Cloudera Manager Services Using Cloudera API [Part 1] we install the cloudera management se...
Setting Up Cloudera Manager Services Using Cloudera API [Part 1]
Cloudera API is a very convenient way to setup a cluster and do more.
Getting Started with Cloudera API
This is a basic steps to get connected with cloudera manager.
cloudera-manager
Cloudera Hadoop Deployment using Cloudera Manager Cookbook [CentOS 6.6]
This cookbook [currently as of now] can be used to setup a Cloudera Manager Server (Management Server) running on MySQL/Postgres database. But the intended u...
cluster
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
cman
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
commands
Remove Old Files using find Command
GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of preceden...
config
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
couchdb
Installing CouchDB on Ubuntu 14 LTS.
CouchDB is a database that completely embraces the web. Store your data with JSON documents. Access your documents and query your indexes with your web brows...
create
Simple Script to create a user on centos 6.5
Default passwd is set as username@123 As we are setting the chage, user needs to change the passwd on first login.
csv-processing
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
cygwin
Package Installer for Cygwin [apt-cyg].
After a longtime I was on my windows machine and had to make it feel more like my linux machine. So install the thing what everyone else does cygwin. Surpise...
data-collector
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
data-integration
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
data-processing
Streaming Data Processing - Storm Vs Spark.
Apache Spark is an in-memory distributed data analysis platform– primarily targeted at speeding up batch analysis jobs, iterative machine learning jobs, inte...
dataflow
Setting up Scheduled dataflow backups using Batch templates.
TL;DR In this post we will be setting up a scheduled job to take backup for Bigtable table in avro format.
dataproc
Setting Up Kerberos on a Dataproc Cluster A Step-by-Step Guide
Kerberos authentication in Google Dataproc clusters offers enhanced security and user isolation. It’s a crucial step for multi-tenancy, encryption, and user ...
datastream
Datastream Workflow - Cloud SQL (MySQL) to BigQuery via Cloud Auth Proxy
Welcome back to our series on datastream workflows! In our previous article, we explored the basics of setting up a datastream workflow.
Establishing a Datastream from Cloud SQL (MySQL) to BigQuery
This guide provides detailed instructions on setting up a datastream connection from Cloud SQL (MySQL) to BigQuery. We aim to simplify the process by using d...
disk
LUKS Disk encryption for CentOS 6.6/RHEL 6
Linux Unified Key Setup-on-disk-format (or LUKS) allows you to encrypt partitions on your Linux computer. This is particularly important when it comes to mo...
distcp
Long Running Jobs in YARN distcp.
Usually distcp and other batch jobs run for a very long time. This is fine if you are running a HADOOP environment without kerberos. When we kerberize a clus...
ERROR - java heap space caused using distcp.
When you see this error default thing to do is the set the HADOOP_CLIENT_OPTS config on your env. In My case did a typo HADDOP_CLIENT_OPTS which caused us sp...
docker
Installing Ruby2.4 on Ubuntu Docker Container.
Was setting up jekyll using docker, but was not able to install ruby on the docker machine as apt-add-repository was not working. Below is my Dockerfile when...
documents
Creating Documents Using pandoc
Pandoc is an opensource utility to create documents from markdown. We can create PDF, Doc, doc, html and other formats. And can be also used to convert html ...
encryption
LUKS Disk encryption for CentOS 6.6/RHEL 6
Linux Unified Key Setup-on-disk-format (or LUKS) allows you to encrypt partitions on your Linux computer. This is particularly important when it comes to mo...
error
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
No valid credentials provided Mechanism level Failed to find any Kerberos tgt
We have 2 domains forests in our environment, ABC and XYZ. We were not able to authenticate normal users from either of the domains. Most of the information ...
VMware Workstation 10 Error Not enough physical memory is available to power this virtual machine
If you are using VMWare Workstation (or VMWare player) on Windows 8.1 and have just update Windows, specifically KB2995388, you may receive this error messag...
exec
Harnessing the Power of null_resource with local-exec and remote-exec in Terraform
Terraform, a widely adopted Infrastructure as Code (IaC) tool, offers a rich array of resources and provisioners for efficiently managing and configuring inf...
export
Data Export from Datastore and Firestore
In this blog post, we will venture into exporting data from Firestore and Datastore modes. Find the code on Github.
ftp
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
ftp-server
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
gce
Automating GCE Image Creation with Packer
Ensuring consistency and streamlining infrastructure provisioning is crucial for effective cloud management. Creating custom virtual machine (VM) images on G...
Google Compute Engine (GCE) Instance with Ansible
Using Ansible within the initialization script of a Google Compute Engine (GCE) instance can streamline and automate the configuration and setup of your virt...
gcp
Cloud VPN - GCP Learning Notes.
Cloud VPN securely connects your peer network to your Virtual Private Cloud (VPC) network through an IPsec VPN connection.
Cloud Monitoring - Stackdriver - GCP Learning Notes.
Stackdriver driver provides monitoring, logging, error reporting, tracing and debugging services. Currently known as Google Cloud’s operations suite.
Cloud Databases - SQL/Spanner/Firestore/BigTable/Memorystore - GCP Learning Notes.
Cloud SQL is a fully managed service which includes MySQL, PostgreSQL, Microsoft SQL Server. And for horizontal scalability, consider using Cloud Spanner.
Cloud IAM - GCP Learning Notes.
Google Cloud offers IAM, which lets you give more granular access to specific Google Cloud resources and prevents unwanted access to other resources.
Cloud Storge Bucket - GCP Learning Notes.
Cloud Storage is Google Cloud’s object storage service, and it allows worldwide storage and retrieval of any amount of data at anytime.
gcs
Design IAM on Google Cloud Platform
Security is paramount when setting up resources in the cloud or on-premises. It encompasses various layers of protection, including network security, encrypt...
Harnessing the Power of null_resource with local-exec and remote-exec in Terraform
Terraform, a widely adopted Infrastructure as Code (IaC) tool, offers a rich array of resources and provisioners for efficiently managing and configuring inf...
getmerge
getmerge Operation not Permitted
getmerge command takes a source directory and a destination file as input and concatenates files in src into the destination local file.
github
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
gparted
Mounting RAID10 using parted.
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk, using globally unique identifiers (GUID). Although it...
ha
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
hadoop
getmerge Operation not Permitted
getmerge command takes a source directory and a destination file as input and concatenates files in src into the destination local file.
Long Running Jobs in YARN distcp.
Usually distcp and other batch jobs run for a very long time. This is fine if you are running a HADOOP environment without kerberos. When we kerberize a clus...
ERROR - java heap space caused using distcp.
When you see this error default thing to do is the set the HADOOP_CLIENT_OPTS config on your env. In My case did a typo HADDOP_CLIENT_OPTS which caused us sp...
Bulk Upload Hfiles doBulkLoad - LoadIncrementalHfiles failed. This is recoverable. Hbase Encryption Zone.
We were working with a team who were uploading data into HBASE using the doBulkLoad, also we had moved the /hbase to encryption zone. The issue started after...
Checking HDFS health using fsck.
When we have large data sets on the cluster, there will be corruptions of blocks. This could be due to disk or any other.
HDFS Block Corrupted - HBase Error Could not seek StoreFileScanner Invalid HFile block magic
We ran into an issue which was causing HBase to fail. When the job was rerun then it would work again. In the logs we got 2 errors.
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
Enable Kerberos Using Cloudera API.
Python API for cloudera is really nice, apart from getting the cluster setup, we can also do configuration and automation. We use a lot of automation using C...
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting Up Zookeeper Services Using Cloudera API [Part 2]
This is the second follow up post. In the earlier post Setting Up Cloudera Manager Services Using Cloudera API [Part 1] we install the cloudera management se...
Setting Up Cloudera Manager Services Using Cloudera API [Part 1]
Cloudera API is a very convenient way to setup a cluster and do more.
Getting Started with Cloudera API
This is a basic steps to get connected with cloudera manager.
Basic Testing On Hadoop Environment [Cloudera]
These are a set of testing which we can do on a Hadoop environment. These are basic testing to make sure the environment is setup correctly.
Setting Hue to Listen on 0.0.0.0 [Cloudera]
We were working on setting up a cluster, but the Hue URL was set to a private IP of the server. As we had setup all the nodes to access each other using a pr...
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Update Cloudera Manager to specific version [5.4.5]
Upgrading Cloudera Manager 5 to the Latest Cloudera Manager, In most cases it is possible to complete the following upgrade without shutting down most CDH se...
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
No valid credentials provided Mechanism level Failed to find any Kerberos tgt
We have 2 domains forests in our environment, ABC and XYZ. We were not able to authenticate normal users from either of the domains. Most of the information ...
Interface Forwarding - from eth1 to eth0 on EDGE node.
Adding route to all the slaves which reside on a private network to communicate with External Server directly using an EDGE node using Interface Forwarding.
Installing ansible on RHEL 6.6.
Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchest...
Ansible Playbook - Setup Zookeeper Using tarball.
This is a simple zookeeper playbook, to quickly start zookeeper running on a single or more nodes, in a clustered mode.
Ansible Playbook - Setup Storm Cluster.
This is a simple Storm Cluster Setup. We are using a dedicated Zookeeper Cluster/Node, instead of the standalone zkserver. Below is how we will deploy our c...
Ansible Playbook - Setup Kafka Cluster.
This is a simple Kafka setup. In this setup we are running kafka over a dedicated zookeeper service. (NOT the standalone zookeeper which comes with kafka)
Ansible Playbook - Setup Hadoop CDH5 Using tarball.
Setting up Hadoop using Ansible, we will be using cdh5 tarball for installation of the cluster.
Creating a Multi-node Cassandra Cluster on Centos 6.5.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and pr...
Performance Tuning HBase and Hadoop.
Using HBase in production often requires that you turn many knobs to make it hum as expected. More Here http://hbase.apache.org/0.94/book/performance.html
Setting you Hbase Cluster on Hadoop (YARN). Ubuntu 12.04 LTS
HBase is an open source, non-relational, distributed database modeled after Google’s BigTable and written in Java. It is developed as part of Apache Software...
Installing KAFKA Single Node - Quick Start.
Apache Kafka is publish-subscribe messaging rethought as a distributed commit log. Kafka is a distributed, partitioned, replicated commit log service. It pro...
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
Setting up Local HBase on Top of HDFS.
First lets setup the Hbase Configuration Files. For pseudo-distributed replace with 'localhost'
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
hadoop-config
Setting up Local HBase on Top of HDFS.
First lets setup the Hbase Configuration Files. For pseudo-distributed replace with 'localhost'
haproxy
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
hashicorp
Setting Up HashiCorp Vault for Secret Management
We will walk you through the process of setting up HashiCorp Vault to effectively manage your secrets. This guide is an gettinf started with vault with terra...
hbase
Bulk Upload Hfiles doBulkLoad - LoadIncrementalHfiles failed. This is recoverable. Hbase Encryption Zone.
We were working with a team who were uploading data into HBASE using the doBulkLoad, also we had moved the /hbase to encryption zone. The issue started after...
HDFS Block Corrupted - HBase Error Could not seek StoreFileScanner Invalid HFile block magic
We ran into an issue which was causing HBase to fail. When the job was rerun then it would work again. In the logs we got 2 errors.
Performance Tuning HBase and Hadoop.
Using HBase in production often requires that you turn many knobs to make it hum as expected. More Here http://hbase.apache.org/0.94/book/performance.html
Setting you Hbase Cluster on Hadoop (YARN). Ubuntu 12.04 LTS
HBase is an open source, non-relational, distributed database modeled after Google’s BigTable and written in Java. It is developed as part of Apache Software...
Setting up Local HBase on Top of HDFS.
First lets setup the Hbase Configuration Files. For pseudo-distributed replace with 'localhost'
Enable Authorization on HBase.
Enable Authorization on HBase.
hbase-config
Setting up Local HBase on Top of HDFS.
First lets setup the Hbase Configuration Files. For pseudo-distributed replace with 'localhost'
hdfs
getmerge Operation not Permitted
getmerge command takes a source directory and a destination file as input and concatenates files in src into the destination local file.
Checking HDFS health using fsck.
When we have large data sets on the cluster, there will be corruptions of blocks. This could be due to disk or any other.
HDFS Block Corrupted - HBase Error Could not seek StoreFileScanner Invalid HFile block magic
We ran into an issue which was causing HBase to fail. When the job was rerun then it would work again. In the logs we got 2 errors.
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting up Local HBase on Top of HDFS.
First lets setup the Hbase Configuration Files. For pseudo-distributed replace with 'localhost'
heartbeat
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
httpd HA using Heartbeat.
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will c...
high-availability
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
httpd HA using Heartbeat.
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will c...
high-avaliability
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
hive
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
http
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
httpd HA using Heartbeat.
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will c...
httpd
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
httpd HA using Heartbeat.
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will c...
https
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
iam
Design IAM on Google Cloud Platform
Security is paramount when setting up resources in the cloud or on-premises. It encompasses various layers of protection, including network security, encrypt...
Cloud IAM - GCP Learning Notes.
Google Cloud offers IAM, which lets you give more granular access to specific Google Cloud resources and prevents unwanted access to other resources.
image-processing
Cropping Bulk Images Using Python.
I was working on getting post headers for my post on this blog. I had couple of images from unsplash. But the header for the post need to be a little more ho...
install
Installing python 2.7.x on Centos 6.5/6.6
By default centos comes with python 2.6. In most of the cases we might need python 2.7 or later to be installed. Below are few ways to install python 2.7 on ...
install-java
Setting SUN Java for Ubuntu.
The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms released by Oracle Corporation in the form of ...
integrate
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
interface
Setting iptables - Port forwarding from one interface to another.
iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as...
Interface Forwarding - from eth1 to eth0 on EDGE node.
Adding route to all the slaves which reside on a private network to communicate with External Server directly using an EDGE node using Interface Forwarding.
iptables
Setting iptables - Port forwarding from one interface to another.
iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as...
ireasoning
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
java
Unable to locate package oracle-java7-installer - Ubuntu 13
Was installing Java today, this is an easy install thanks to ppa:webupd8team/java, but when I tried it was not working, but has worked for me all this while.
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Setting SUN Java for Ubuntu.
The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms released by Oracle Corporation in the form of ...
jdk
Unable to locate package oracle-java7-installer - Ubuntu 13
Was installing Java today, this is an easy install thanks to ppa:webupd8team/java, but when I tried it was not working, but has worked for me all this while.
Setting SUN Java for Ubuntu.
The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms released by Oracle Corporation in the form of ...
jekyll
Installing Ruby2.4 on Ubuntu Docker Container.
Was setting up jekyll using docker, but was not able to install ruby on the docker machine as apt-add-repository was not working. Below is my Dockerfile when...
json
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
kafka
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Ansible Playbook - Setup Kafka Cluster.
This is a simple Kafka setup. In this setup we are running kafka over a dedicated zookeeper service. (NOT the standalone zookeeper which comes with kafka)
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
NodeJS Kafka Producer - Using kafka-node
Now that we have Kafka and NodeJS ready. Lets some data to our Kafka Cluster.
Sending JSON to NodeJS to Kafka.
What we are trying to achieve ?
Installing KAFKA Single Node - Quick Start.
Apache Kafka is publish-subscribe messaging rethought as a distributed commit log. Kafka is a distributed, partitioned, replicated commit log service. It pro...
kafka-node
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
NodeJS Kafka Producer - Using kafka-node
Now that we have Kafka and NodeJS ready. Lets some data to our Kafka Cluster.
Sending JSON to NodeJS to Kafka.
What we are trying to achieve ?
kerberos
Setting Up Kerberos on a Dataproc Cluster A Step-by-Step Guide
Kerberos authentication in Google Dataproc clusters offers enhanced security and user isolation. It’s a crucial step for multi-tenancy, encryption, and user ...
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Enable Kerberos Using Cloudera API.
Python API for cloudera is really nice, apart from getting the cluster setup, we can also do configuration and automation. We use a lot of automation using C...
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
No valid credentials provided Mechanism level Failed to find any Kerberos tgt
We have 2 domains forests in our environment, ABC and XYZ. We were not able to authenticate normal users from either of the domains. Most of the information ...
kernel
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
kitchen
Chef Kitchen Test Deployment on Multiple Nodes with Private Interface.
What is Kitchen? Kitchen provides a test harness to execute infrastructure code on one or more platforms in isolation.
Windows Testing Using Kitchen Chef
Kitchen-Vagrant has the capability to spin up a windows instance for testing. To make it work you will need the vagrant-winrm to be installted on the worksta...
Encrypted Data Bags - Chef
Data Bags are a way to store information on the chef-server which all the cookbooks can access. Few more additional advantages are that we can encrypt the da...
krb5
No valid credentials provided Mechanism level Failed to find any Kerberos tgt
We have 2 domains forests in our environment, ABC and XYZ. We were not able to authenticate normal users from either of the domains. Most of the information ...
kvm
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
ldap
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
learning
Setting up Postgres using Dockerfile.
In this blog post we will be setting up a postgres database on docker using Dockerfile.
Python - Virtual Environment.
Python virtual environment creates a isoloated workspace of python work. This helps in creating project specific virtual environment without worrying about ...
Setting up Postgres on Docker.
In this blog post we will be setting up a postgres database on docker.
Python - List Comprehensions.
List Comprehensions provides easy and functional way to create list in python. We could make a single line of code which otherwise would take a few lines. l...
Python Getting Started - Learning Notes.
Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java. This is basic documentation for getting star...
linux
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
Enable Kerberos Using Cloudera API.
Python API for cloudera is really nice, apart from getting the cluster setup, we can also do configuration and automation. We use a lot of automation using C...
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting Up Zookeeper Services Using Cloudera API [Part 2]
This is the second follow up post. In the earlier post Setting Up Cloudera Manager Services Using Cloudera API [Part 1] we install the cloudera management se...
Setting Up Cloudera Manager Services Using Cloudera API [Part 1]
Cloudera API is a very convenient way to setup a cluster and do more.
Getting Started with Cloudera API
This is a basic steps to get connected with cloudera manager.
Basic Testing On Hadoop Environment [Cloudera]
These are a set of testing which we can do on a Hadoop environment. These are basic testing to make sure the environment is setup correctly.
Setting Hue to Listen on 0.0.0.0 [Cloudera]
We were working on setting up a cluster, but the Hue URL was set to a private IP of the server. As we had setup all the nodes to access each other using a pr...
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
Zabbix History Table Clean Up
Zabbix history table gets really big, and if you are in a situation where you want to clean it up. Then we can do so, using the below steps.
Package Installer for Cygwin [apt-cyg].
After a longtime I was on my windows machine and had to make it feel more like my linux machine. So install the thing what everyone else does cygwin. Surpise...
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Installing CouchDB on Ubuntu 14 LTS.
CouchDB is a database that completely embraces the web. Store your data with JSON documents. Access your documents and query your indexes with your web brows...
Installing MongoDB on Ubuntu 14 LTS.
MongoDB is an open-source document database, and leading NoSQL database. MongoDB is written in c++. Below is a brief document about installing a mongodb on a...
Encrypted Data Bags - Chef
Data Bags are a way to store information on the chef-server which all the cookbooks can access. Few more additional advantages are that we can encrypt the da...
Remove Old Files using find Command
GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of preceden...
Moving RRD file from 32bit to 64bit Architecture
When we were working on a nagios monitoring system we were migrating from a 32bit nagios to a 64bit Architecture. Most of the graphs are not working as the R...
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
Standalone Chef Server / Workstation / Client Setup on CentOS 6
The standalone installation of Chef server creates a working installation on a single server. This installation is also useful when you are installing Chef s...
Creating Documents Using pandoc
Pandoc is an opensource utility to create documents from markdown. We can create PDF, Doc, doc, html and other formats. And can be also used to convert html ...
Check Port on Remote Server CentOS 6.6/RHEL 6
Checking port available on a remote machine using nc command instead of telnet. Same command can be used to check on a remote server as well, change the 127....
LUKS Disk encryption for CentOS 6.6/RHEL 6
Linux Unified Key Setup-on-disk-format (or LUKS) allows you to encrypt partitions on your Linux computer. This is particularly important when it comes to mo...
Mysql Database Moving Data Directory to New Location.
How to move an existing data directory in mysql to a new location. We were running out of space and had to move the existing data directory to a new drive. B...
Mysql Database Disk Usage.
We were running out of disk space on one of the databases server, we need to get information on what the current table/database usage was. Below are few comm...
Installing python 2.7.x on Centos 6.5/6.6
By default centos comes with python 2.6. In most of the cases we might need python 2.7 or later to be installed. Below are few ways to install python 2.7 on ...
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Setting up SNMP Trapper for Zabbix.
Receiving SNMP traps is the opposite to querying SNMP-enabled devices. In this case the information is sent from a SNMP-enabled device and is collected or “t...
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Update Cloudera Manager to specific version [5.4.5]
Upgrading Cloudera Manager 5 to the Latest Cloudera Manager, In most cases it is possible to complete the following upgrade without shutting down most CDH se...
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Setting iptables - Port forwarding from one interface to another.
iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as...
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
Installing squid as a sibling to an already existing Parent squid.
Squid is a caching and forwarding web proxy. It has a wide variety of uses, from speeding up a web server by caching repeated requests; to caching web, DNS a...
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
Interface Forwarding - from eth1 to eth0 on EDGE node.
Adding route to all the slaves which reside on a private network to communicate with External Server directly using an EDGE node using Interface Forwarding.
Installing ansible on RHEL 6.6.
Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchest...
Mounting RAID10 using parted.
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk, using globally unique identifiers (GUID). Although it...
Setup and Configure NFS Mounts on Linux Server
A Network File System (NFS) allows remote hosts to mount file systems over a network and interact with those file systems as though they are mounted locally....
Ansible Playbook - Setup Zookeeper Using tarball.
This is a simple zookeeper playbook, to quickly start zookeeper running on a single or more nodes, in a clustered mode.
Ansible Playbook - Setup Storm Cluster.
This is a simple Storm Cluster Setup. We are using a dedicated Zookeeper Cluster/Node, instead of the standalone zkserver. Below is how we will deploy our c...
Ansible Playbook - Setup Kafka Cluster.
This is a simple Kafka setup. In this setup we are running kafka over a dedicated zookeeper service. (NOT the standalone zookeeper which comes with kafka)
Ansible Playbook - Setup Hadoop CDH5 Using tarball.
Setting up Hadoop using Ansible, we will be using cdh5 tarball for installation of the cluster.
Streaming Data Processing - Storm Vs Spark.
Apache Spark is an in-memory distributed data analysis platform– primarily targeted at speeding up batch analysis jobs, iterative machine learning jobs, inte...
Creating a passwordless entry on Centos 6.5.
You can enter a linux system without entring a password using below steps. We will be creating a ssh jey which will be share between the servers, which will ...
Creating a Multi-node Cassandra Cluster on Centos 6.5.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and pr...
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
Performance Tuning HBase and Hadoop.
Using HBase in production often requires that you turn many knobs to make it hum as expected. More Here http://hbase.apache.org/0.94/book/performance.html
Setting you Hbase Cluster on Hadoop (YARN). Ubuntu 12.04 LTS
HBase is an open source, non-relational, distributed database modeled after Google’s BigTable and written in Java. It is developed as part of Apache Software...
Unable to locate package oracle-java7-installer - Ubuntu 13
Was installing Java today, this is an easy install thanks to ppa:webupd8team/java, but when I tried it was not working, but has worked for me all this while.
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
Using npm behind a proxy
npm stands for Node Package Manager, and is the default package manager for the JavaScript runtime environment Node.js.
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
NodeJS Kafka Producer - Using kafka-node
Now that we have Kafka and NodeJS ready. Lets some data to our Kafka Cluster.
Sending JSON to NodeJS to Kafka.
What we are trying to achieve ?
Installing NodeJS on Centos 6.6.
Node.js is an open-source, cross-platform runtime environment for developing server-side web applications. Node.js applications are written in JavaScript and...
Installing KAFKA Single Node - Quick Start.
Apache Kafka is publish-subscribe messaging rethought as a distributed commit log. Kafka is a distributed, partitioned, replicated commit log service. It pro...
sudo Permission On Server - effective uid is not 0, is sudo installed setuid root?
Got into this issue on the server, when trying to install mysql-server.
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
Creating Virtual Interface and Assign Multiple IP Addresses.
Current IP of the server : 10.130.18.11. Virtual IPs being assigned to server : 10.130.18.22, 10.130.18.23, 10.130.18.24 to our server.. Go to network-scrip...
Changing Timezone in Ubuntu server.
Changing Timezone in Ubuntu server.
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
Setting SUN Java for Ubuntu.
The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms released by Oracle Corporation in the form of ...
Simple Script to create a user on centos 6.5
Default passwd is set as username@123 As we are setting the chage, user needs to change the passwd on first login.
Performance Tuning for nginx
Nginx (pronounced engine x) is a web server with a strong focus on high concurrency, performance and low memory usage. It can also act as a reverse proxy ser...
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
httpd HA using Heartbeat.
httpd is the Apache HyperText Transfer Protocol (HTTP) server program. It is designed to be run as a standalone daemon process. When used like this it will c...
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
load-balancing
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
Performance Tuning for nginx
Nginx (pronounced engine x) is a web server with a strong focus on high concurrency, performance and low memory usage. It can also act as a reverse proxy ser...
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
load-testing
Installing and Initial setup of Tsung Load Testing CentOS
Tsung (formerly known as idx-Tsunami) is a stress testing tool written in the Erlang language and distributed under the GPL license. It can currently stress ...
Setup Seige on Centos 6.5, Kernel 2.6, CPU x86_64
Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to...
luks
LUKS Disk encryption for CentOS 6.6/RHEL 6
Linux Unified Key Setup-on-disk-format (or LUKS) allows you to encrypt partitions on your Linux computer. This is particularly important when it comes to mo...
manager
Update Cloudera Manager to specific version [5.4.5]
Upgrading Cloudera Manager 5 to the Latest Cloudera Manager, In most cases it is possible to complete the following upgrade without shutting down most CDH se...
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
mib
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
mongo
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Installing MongoDB on Ubuntu 14 LTS.
MongoDB is an open-source document database, and leading NoSQL database. MongoDB is written in c++. Below is a brief document about installing a mongodb on a...
mongodb
MongoDB to Neo4j Using neo4j_doc_manager.
We had a requirement where we wanted to have all the data which is in mongodb to be replicated on neo4j to show few graphs. Here is quick way to demonstrate ...
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Installing MongoDB on Ubuntu 14 LTS.
MongoDB is an open-source document database, and leading NoSQL database. MongoDB is written in c++. Below is a brief document about installing a mongodb on a...
monitoring
Cloud VPN - GCP Learning Notes.
Cloud VPN securely connects your peer network to your Virtual Private Cloud (VPC) network through an IPsec VPN connection.
Cloud Monitoring - Stackdriver - GCP Learning Notes.
Stackdriver driver provides monitoring, logging, error reporting, tracing and debugging services. Currently known as Google Cloud’s operations suite.
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
Zabbix History Table Clean Up
Zabbix history table gets really big, and if you are in a situation where you want to clean it up. Then we can do so, using the below steps.
knife Quick Reference
This is a quick reference for few of the commands which I use often.
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
Setup/Configuration Nagios XI on Centos6.6
Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a f...
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Zabbix Installation 2.4 - CentOS 6.5
Zabbix is the ultimate enterprise-level software designed for monitoring availability and performance of IT infrastructure components. Zabbix is open source ...
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
mount
Mounting RAID10 using parted.
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk, using globally unique identifiers (GUID). Although it...
Setup and Configure NFS Mounts on Linux Server
A Network File System (NFS) allows remote hosts to mount file systems over a network and interact with those file systems as though they are mounted locally....
multiple-ip
Creating Virtual Interface and Assign Multiple IP Addresses.
Current IP of the server : 10.130.18.11. Virtual IPs being assigned to server : 10.130.18.22, 10.130.18.23, 10.130.18.24 to our server.. Go to network-scrip...
mysql
Mysql Database Moving Data Directory to New Location.
How to move an existing data directory in mysql to a new location. We were running out of space and had to move the existing data directory to a new drive. B...
Mysql Database Disk Usage.
We were running out of disk space on one of the databases server, we need to get information on what the current table/database usage was. Below are few comm...
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
nagios
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
Zabbix History Table Clean Up
Zabbix history table gets really big, and if you are in a situation where you want to clean it up. Then we can do so, using the below steps.
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Installing CouchDB on Ubuntu 14 LTS.
CouchDB is a database that completely embraces the web. Store your data with JSON documents. Access your documents and query your indexes with your web brows...
Installing MongoDB on Ubuntu 14 LTS.
MongoDB is an open-source document database, and leading NoSQL database. MongoDB is written in c++. Below is a brief document about installing a mongodb on a...
knife Quick Reference
This is a quick reference for few of the commands which I use often.
Moving RRD file from 32bit to 64bit Architecture
When we were working on a nagios monitoring system we were migrating from a 32bit nagios to a 64bit Architecture. Most of the graphs are not working as the R...
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
Setup/Configuration Nagios XI on Centos6.6
Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a f...
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Zabbix Installation 2.4 - CentOS 6.5
Zabbix is the ultimate enterprise-level software designed for monitoring availability and performance of IT infrastructure components. Zabbix is open source ...
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
nagiosxi
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
Zabbix History Table Clean Up
Zabbix history table gets really big, and if you are in a situation where you want to clean it up. Then we can do so, using the below steps.
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
Setup/Configuration Nagios XI on Centos6.6
Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a f...
nc
Check Port on Remote Server CentOS 6.6/RHEL 6
Checking port available on a remote machine using nc command instead of telnet. Same command can be used to check on a remote server as well, change the 127....
neo4j
MongoDB to Neo4j Using neo4j_doc_manager.
We had a requirement where we wanted to have all the data which is in mongodb to be replicated on neo4j to show few graphs. Here is quick way to demonstrate ...
network
Setting iptables - Port forwarding from one interface to another.
iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as...
Interface Forwarding - from eth1 to eth0 on EDGE node.
Adding route to all the slaves which reside on a private network to communicate with External Server directly using an EDGE node using Interface Forwarding.
Creating Virtual Interface and Assign Multiple IP Addresses.
Current IP of the server : 10.130.18.11. Virtual IPs being assigned to server : 10.130.18.22, 10.130.18.23, 10.130.18.24 to our server.. Go to network-scrip...
nfs
Setup and Configure NFS Mounts on Linux Server
A Network File System (NFS) allows remote hosts to mount file systems over a network and interact with those file systems as though they are mounted locally....
nginx
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
Performance Tuning for nginx
Nginx (pronounced engine x) is a web server with a strong focus on high concurrency, performance and low memory usage. It can also act as a reverse proxy ser...
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
Setting up NGINX for HTTP load balancing.
NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. NGINX is known for its high performance, ...
nodejs
Using npm behind a proxy
npm stands for Node Package Manager, and is the default package manager for the JavaScript runtime environment Node.js.
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
NodeJS Kafka Producer - Using kafka-node
Now that we have Kafka and NodeJS ready. Lets some data to our Kafka Cluster.
Sending JSON to NodeJS to Kafka.
What we are trying to achieve ?
Installing NodeJS on Centos 6.6.
Node.js is an open-source, cross-platform runtime environment for developing server-side web applications. Node.js applications are written in JavaScript and...
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
npm
Using npm behind a proxy
npm stands for Node Package Manager, and is the default package manager for the JavaScript runtime environment Node.js.
null_resource
Harnessing the Power of null_resource with local-exec and remote-exec in Terraform
Terraform, a widely adopted Infrastructure as Code (IaC) tool, offers a rich array of resources and provisioners for efficiently managing and configuring inf...
offline
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
opensource
knife Quick Reference
This is a quick reference for few of the commands which I use often.
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
pacemaker
Creating a two-node RHEL cluster with Virtual IP using CMAN and Pacemaker.
CMAN v3 is a Corsync plugin that monitors the names and number of active cluster nodes in order to deliver membership and quorum information to clients (such...
packer
Automating GCE Image Creation with Packer
Ensuring consistency and streamlining infrastructure provisioning is crucial for effective cloud management. Creating custom virtual machine (VM) images on G...
pam
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
parted
Mounting RAID10 using parted.
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk, using globally unique identifiers (GUID). Although it...
pentaho
Setting up Pentaho Data Integration 5.4.1 with Hadoop Cluster (Clouder Manager)
Pentaho Data Integration (PDI) is a suite of open source Business Intelligence (BI) products which provide data integration, OLAP services, reporting, dashb...
performance
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
Performance Tuning for nginx
Nginx (pronounced engine x) is a web server with a strong focus on high concurrency, performance and low memory usage. It can also act as a reverse proxy ser...
Installing and Initial setup of Tsung Load Testing CentOS
Tsung (formerly known as idx-Tsunami) is a stress testing tool written in the Erlang language and distributed under the GPL license. It can currently stress ...
Setup Seige on Centos 6.5, Kernel 2.6, CPU x86_64
Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to...
performance-tuning
Performance Tuning HBase and Hadoop.
Using HBase in production often requires that you turn many knobs to make it hum as expected. More Here http://hbase.apache.org/0.94/book/performance.html
permissions
sudo Permission On Server - effective uid is not 0, is sudo installed setuid root?
Got into this issue on the server, when trying to install mysql-server.
pitr
Firestore Native Mode - Point in Time Recovery (PITR)
Data is invaluable, and as any developer would testify, ensuring its security and availability in the event of unintended deletion or modification is paramou...
port-forwarding
Setting iptables - Port forwarding from one interface to another.
iptables is a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall (implemented as...
postgres
Setting up Postgres using Dockerfile.
In this blog post we will be setting up a postgres database on docker using Dockerfile.
Setting up Postgres on Docker.
In this blog post we will be setting up a postgres database on docker.
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
proxy
Datastream Workflow - Cloud SQL (MySQL) to BigQuery via Cloud Auth Proxy
Welcome back to our series on datastream workflows! In our previous article, we explored the basics of setting up a datastream workflow.
Installing squid as a sibling to an already existing Parent squid.
Squid is a caching and forwarding web proxy. It has a wide variety of uses, from speeding up a web server by caching repeated requests; to caching web, DNS a...
How to setup HAProxy
HAProxy is the Reliable, High Performance TCP/HTTP Load Balancer and it works nicely with Deveo Cluster setup.
Using npm behind a proxy
npm stands for Node Package Manager, and is the default package manager for the JavaScript runtime environment Node.js.
python
Data Export from Datastore and Firestore
In this blog post, we will venture into exporting data from Firestore and Datastore modes. Find the code on Github.
Firestore Native Mode - Point in Time Recovery (PITR)
Data is invaluable, and as any developer would testify, ensuring its security and availability in the event of unintended deletion or modification is paramou...
Design IAM on Google Cloud Platform
Security is paramount when setting up resources in the cloud or on-premises. It encompasses various layers of protection, including network security, encrypt...
Harnessing the Power of null_resource with local-exec and remote-exec in Terraform
Terraform, a widely adopted Infrastructure as Code (IaC) tool, offers a rich array of resources and provisioners for efficiently managing and configuring inf...
Exploring Data Extraction from BigQuery
BigQuery, Google’s fully-managed and serverless data warehouse, empowers organizations to analyze massive datasets with remarkable speed and efficiency. But ...
10 Tips for Optimizing Your Queries and Reducing Costs in BigQuery
Google BigQuery is a powerful and cost-effective data warehouse that enables you to analyze massive datasets quickly. However, to get the most out of BigQuer...
Unleash the Power of Google Cloud with the Cloud Asset Inventory Python API
Managing resources in your Google Cloud Platform (GCP) projects is a complex task, especially when dealing with multiple projects. Fortunately, Google offers...
Setting up Postgres using Dockerfile.
In this blog post we will be setting up a postgres database on docker using Dockerfile.
Python - Virtual Environment.
Python virtual environment creates a isoloated workspace of python work. This helps in creating project specific virtual environment without worrying about ...
Setting up Postgres on Docker.
In this blog post we will be setting up a postgres database on docker.
Python - List Comprehensions.
List Comprehensions provides easy and functional way to create list in python. We could make a single line of code which otherwise would take a few lines. l...
Python Getting Started - Learning Notes.
Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java. This is basic documentation for getting star...
MongoDB to Neo4j Using neo4j_doc_manager.
We had a requirement where we wanted to have all the data which is in mongodb to be replicated on neo4j to show few graphs. Here is quick way to demonstrate ...
Variable Substitution in YAML Config pyyaml [Python]
PyYAML - The next generation YAML parser and emitter for Python.
Cropping Bulk Images Using Python.
I was working on getting post headers for my post on this blog. I had couple of images from unsplash. But the header for the post need to be a little more ho...
Installing python 2.7.x on Centos 6.5/6.6
By default centos comes with python 2.6. In most of the cases we might need python 2.7 or later to be installed. Below are few ways to install python 2.7 on ...
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
quick-start
Installing KAFKA Single Node - Quick Start.
Apache Kafka is publish-subscribe messaging rethought as a distributed commit log. Kafka is a distributed, partitioned, replicated commit log service. It pro...
raid
Mounting RAID10 using parted.
GUID Partition Table (GPT) is a standard for the layout of the partition table on a physical hard disk, using globally unique identifiers (GUID). Although it...
recovery
Data Export from Datastore and Firestore
In this blog post, we will venture into exporting data from Firestore and Datastore modes. Find the code on Github.
Firestore Native Mode - Point in Time Recovery (PITR)
Data is invaluable, and as any developer would testify, ensuring its security and availability in the event of unintended deletion or modification is paramou...
redhat
Kafka Kerberos Enable and Testing.
Apache Kafka is a distributed streaming platform. Kafka 2.0 supports Kerberos authentication, Enabling Kerberos Authentication Using the Wizard on cloudera m...
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Parcel Not Distributing Cloudera CDH.
We were deploying one of the cluster on our lab environment which is used by everyone. So the lab has it own share of stale information on it.
Creating /etc/hosts file in Chef.
We had a cluster environment which we needed to update the /etc/hosts file. Which would help communicate between the server over a private network. Our serve...
replication
HA Setup - heartbeat for nginx.
Heartbeat is a daemon that provides cluster infrastructure (communication and membership) services to its clients. This allows clients to know about the pres...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
rhel
knife Quick Reference
This is a quick reference for few of the commands which I use often.
Migrating Nagios XI to a New Server on Centos6.6
Migrating an old Nagios backup to a new nagiosxi server. Migration is simple in Nagios XI, you a backup and restore it. Once that is done we need to update/a...
Setup/Configuration Nagios XI on Centos6.6
Nagios monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a f...
RPM Command Cheat Sheet
RPM (Redhat Package Manager) is the most popular package utility and is used mostly on RHEL, Centos and Fedora. RPM helps user/admins to build, install, que...
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Installing ansible on RHEL 6.6.
Ansible is a radically simple IT automation engine that automates cloud provisioning, configuration management, application deployment, intra-service orchest...
Creating a passwordless entry on Centos 6.5.
You can enter a linux system without entring a password using below steps. We will be creating a ssh jey which will be share between the servers, which will ...
Creating a Multi-node Cassandra Cluster on Centos 6.5.
The Apache Cassandra database is the right choice when you need scalability and high availability without compromising performance. Linear scalability and pr...
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Installing NodeJS on Centos 6.6.
Node.js is an open-source, cross-platform runtime environment for developing server-side web applications. Node.js applications are written in JavaScript and...
Simple Script to create a user on centos 6.5
Default passwd is set as username@123 As we are setting the chage, user needs to change the passwd on first login.
root
sudo Permission On Server - effective uid is not 0, is sudo installed setuid root?
Got into this issue on the server, when trying to install mysql-server.
rpms
RPM Command Cheat Sheet
RPM (Redhat Package Manager) is the most popular package utility and is used mostly on RHEL, Centos and Fedora. RPM helps user/admins to build, install, que...
rrd
Moving RRD file from 32bit to 64bit Architecture
When we were working on a nagios monitoring system we were migrating from a 32bit nagios to a 64bit Architecture. Most of the graphs are not working as the R...
ruby
Installing Ruby2.4 on Ubuntu Docker Container.
Was setting up jekyll using docker, but was not able to install ruby on the docker machine as apt-add-repository was not working. Below is my Dockerfile when...
scheduler
Setting up Scheduled dataflow backups using Batch templates.
TL;DR In this post we will be setting up a scheduled job to take backup for Bigtable table in avro format.
script
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
security
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Getting started with Hive with Kerberos.
Apache Hive is a powerful data warehousing application built on top of Hadoop; it enables you to access your data using Hive QL, a language that is similar t...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
seige
Installing and Initial setup of Tsung Load Testing CentOS
Tsung (formerly known as idx-Tsunami) is a stress testing tool written in the Erlang language and distributed under the GPL license. It can currently stress ...
Setup Seige on Centos 6.5, Kernel 2.6, CPU x86_64
Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to...
setuid
sudo Permission On Server - effective uid is not 0, is sudo installed setuid root?
Got into this issue on the server, when trying to install mysql-server.
sftp
SFTP Data Collector
Easy way to collect files recursively over a sftp server is to connect to the server over scp and do scp -r. Problem was that the device we were connecting ...
snmp
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Setting up SNMP Trapper for Zabbix.
Receiving SNMP traps is the opposite to querying SNMP-enabled devices. In this case the information is sent from a SNMP-enabled device and is collected or “t...
spago
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
spago-bi
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
spagobi
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
spark
Streaming Data Processing - Storm Vs Spark.
Apache Spark is an in-memory distributed data analysis platform– primarily targeted at speeding up batch analysis jobs, iterative machine learning jobs, inte...
sql
Cloud Databases - SQL/Spanner/Firestore/BigTable/Memorystore - GCP Learning Notes.
Cloud SQL is a fully managed service which includes MySQL, PostgreSQL, Microsoft SQL Server. And for horizontal scalability, consider using Cloud Spanner.
squid
Installing squid as a sibling to an already existing Parent squid.
Squid is a caching and forwarding web proxy. It has a wide variety of uses, from speeding up a web server by caching repeated requests; to caching web, DNS a...
ssl
Setting up SSL https On Nagios XI Server
HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Tra...
sssd
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
Access Filter Setup with SSSD
If using access_provider = ldap, this option is mandatory. It specifies an LDAP search filter criteria that must be met for the user to be granted access on ...
Redhat Intergration with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
Simple Steps to Intergrate RHEL with Active Directory using SSSD.
There are inherent structural differences between how Windows and Linux handle system users. The user schemas used in Active Directory and standard LDAPv3 di...
sssd-configuration
Explain - System Security Services Daemon (SSSD) Config.
The System Security Services Daemon (SSSD) provides a set of daemons to manage access to remote directories and authentication mechanisms. It provides Name S...
storage
Cloud Storge Bucket - GCP Learning Notes.
Cloud Storage is Google Cloud’s object storage service, and it allows worldwide storage and retrieval of any amount of data at anytime.
storm
Ansible Playbook - Setup Storm Cluster.
This is a simple Storm Cluster Setup. We are using a dedicated Zookeeper Cluster/Node, instead of the standalone zkserver. Below is how we will deploy our c...
Streaming Data Processing - Storm Vs Spark.
Apache Spark is an in-memory distributed data analysis platform– primarily targeted at speeding up batch analysis jobs, iterative machine learning jobs, inte...
swap
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
swappiness
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
sysctl
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
How To Configure Swappiness
Swappiness is a Linux kernel parameter that controls the relative weight given to swapping out runtime memory, as opposed to dropping pages from the system p...
tarball
Ansible Playbook - Setup Hadoop CDH5 Using tarball.
Setting up Hadoop using Ansible, we will be using cdh5 tarball for installation of the cluster.
terraform
Datastream Workflow - Cloud SQL (MySQL) to BigQuery via Cloud Auth Proxy
Welcome back to our series on datastream workflows! In our previous article, we explored the basics of setting up a datastream workflow.
Establishing a Datastream from Cloud SQL (MySQL) to BigQuery
This guide provides detailed instructions on setting up a datastream connection from Cloud SQL (MySQL) to BigQuery. We aim to simplify the process by using d...
Setting Up HashiCorp Vault for Secret Management
We will walk you through the process of setting up HashiCorp Vault to effectively manage your secrets. This guide is an gettinf started with vault with terra...
Firestore Native Mode - Point in Time Recovery (PITR)
Data is invaluable, and as any developer would testify, ensuring its security and availability in the event of unintended deletion or modification is paramou...
Automating GCE Image Creation with Packer
Ensuring consistency and streamlining infrastructure provisioning is crucial for effective cloud management. Creating custom virtual machine (VM) images on G...
Google Compute Engine (GCE) Instance with Ansible
Using Ansible within the initialization script of a Google Compute Engine (GCE) instance can streamline and automate the configuration and setup of your virt...
Design IAM on Google Cloud Platform
Security is paramount when setting up resources in the cloud or on-premises. It encompasses various layers of protection, including network security, encrypt...
Harnessing the Power of null_resource with local-exec and remote-exec in Terraform
Terraform, a widely adopted Infrastructure as Code (IaC) tool, offers a rich array of resources and provisioners for efficiently managing and configuring inf...
Exploring Data Extraction from BigQuery
BigQuery, Google’s fully-managed and serverless data warehouse, empowers organizations to analyze massive datasets with remarkable speed and efficiency. But ...
10 Tips for Optimizing Your Queries and Reducing Costs in BigQuery
Google BigQuery is a powerful and cost-effective data warehouse that enables you to analyze massive datasets quickly. However, to get the most out of BigQuer...
Unleash the Power of Google Cloud with the Cloud Asset Inventory Python API
Managing resources in your Google Cloud Platform (GCP) projects is a complex task, especially when dealing with multiple projects. Fortunately, Google offers...
Terraform Workflow Validation with null_resource
When working with Terraform, it’s crucial to ensure that your infrastructure follows certain conditions or constraints. While Terraform provides validation m...
Effective Terraform Validation Techniques
Validation in Terraform is an essential practice to detect and prevent errors early in the infrastructure provisioning process. By incorporating robust valid...
Setting Up Kerberos on a Dataproc Cluster A Step-by-Step Guide
Kerberos authentication in Google Dataproc clusters offers enhanced security and user isolation. It’s a crucial step for multi-tenancy, encryption, and user ...
Setting up Scheduled dataflow backups using Batch templates.
TL;DR In this post we will be setting up a scheduled job to take backup for Bigtable table in avro format.
testing
Basic Testing On Hadoop Environment [Cloudera]
These are a set of testing which we can do on a Hadoop environment. These are basic testing to make sure the environment is setup correctly.
Windows Testing Using Kitchen Chef
Kitchen-Vagrant has the capability to spin up a windows instance for testing. To make it work you will need the vagrant-winrm to be installted on the worksta...
Installing and Initial setup of Tsung Load Testing CentOS
Tsung (formerly known as idx-Tsunami) is a stress testing tool written in the Erlang language and distributed under the GPL license. It can currently stress ...
Setup Seige on Centos 6.5, Kernel 2.6, CPU x86_64
Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to...
timezone
Changing Timezone in Ubuntu server.
Changing Timezone in Ubuntu server.
tomcat
Installing SpagoBI 5.1 on Centos 6.5 -Tomcat 7 with MySQL 5.6.
The SpagoBI project is a free software/open source initiative by the SpagoBI Labs of Engineering Group. It aims to realize the most complete 100% open source...
SpagoBI Tomcat Clustering Using mod_jk and httpd on Centos - In-Memory Session Replication.
In an earlier post we did a basic session based replication, but the session was not redundant.
Setting up Tomcat Cluster for SpagoBI 5.1.
Setting up SpagoBI 5.1 on Tomcat with MySQL post. Details on Tomcat Clustering.
trap
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Setting up SNMP Trapper for Zabbix.
Receiving SNMP traps is the opposite to querying SNMP-enabled devices. In this case the information is sent from a SNMP-enabled device and is collected or “t...
tsung
Installing and Initial setup of Tsung Load Testing CentOS
Tsung (formerly known as idx-Tsunami) is a stress testing tool written in the Erlang language and distributed under the GPL license. It can currently stress ...
Setup Seige on Centos 6.5, Kernel 2.6, CPU x86_64
Siege is an http load testing and benchmarking utility. It was designed to let web developers measure their code under duress, to see how it will stand up to...
tuning
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
Hadoop sysctl.conf parameters.
Performace tuning Hadoop at kernel level. sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can con...
Performance Tuning for nginx
Nginx (pronounced engine x) is a web server with a strong focus on high concurrency, performance and low memory usage. It can also act as a reverse proxy ser...
ubuntu
Windows Testing Using Kitchen Chef
Kitchen-Vagrant has the capability to spin up a windows instance for testing. To make it work you will need the vagrant-winrm to be installted on the worksta...
Issues - Monitoring MongoDB using Nagios XI.
Monitoring for mongodb using nagiosxi is straight forword but you might have some issues when we are setting up. Here are few issues which might come up usin...
Installing CouchDB on Ubuntu 14 LTS.
CouchDB is a database that completely embraces the web. Store your data with JSON documents. Access your documents and query your indexes with your web brows...
Installing MongoDB on Ubuntu 14 LTS.
MongoDB is an open-source document database, and leading NoSQL database. MongoDB is written in c++. Below is a brief document about installing a mongodb on a...
Encrypted Data Bags - Chef
Data Bags are a way to store information on the chef-server which all the cookbooks can access. Few more additional advantages are that we can encrypt the da...
Remove Old Files using find Command
GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of preceden...
Moving RRD file from 32bit to 64bit Architecture
When we were working on a nagios monitoring system we were migrating from a 32bit nagios to a 64bit Architecture. Most of the graphs are not working as the R...
Setting you Hbase Cluster on Hadoop (YARN). Ubuntu 12.04 LTS
HBase is an open source, non-relational, distributed database modeled after Google’s BigTable and written in Java. It is developed as part of Apache Software...
Unable to locate package oracle-java7-installer - Ubuntu 13
Was installing Java today, this is an easy install thanks to ppa:webupd8team/java, but when I tried it was not working, but has worked for me all this while.
Changing Timezone in Ubuntu server.
Changing Timezone in Ubuntu server.
Setting SUN Java for Ubuntu.
The Java Development Kit (JDK) is an implementation of either one of the Java SE, Java EE or Java ME platforms released by Oracle Corporation in the form of ...
upgrade
Update Cloudera Manager to specific version [5.4.5]
Upgrading Cloudera Manager 5 to the Latest Cloudera Manager, In most cases it is possible to complete the following upgrade without shutting down most CDH se...
user
Simple Script to create a user on centos 6.5
Default passwd is set as username@123 As we are setting the chage, user needs to change the passwd on first login.
vault
Setting Up HashiCorp Vault for Secret Management
We will walk you through the process of setting up HashiCorp Vault to effectively manage your secrets. This guide is an gettinf started with vault with terra...
vip
Creating Virtual Interface and Assign Multiple IP Addresses.
Current IP of the server : 10.130.18.11. Virtual IPs being assigned to server : 10.130.18.22, 10.130.18.23, 10.130.18.24 to our server.. Go to network-scrip...
virtual-machine
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
VMware Workstation 10 Error Not enough physical memory is available to power this virtual machine
If you are using VMWare Workstation (or VMWare player) on Windows 8.1 and have just update Windows, specifically KB2995388, you may receive this error messag...
vmware
KVM Installation on CentOS 6.x.
KVM is a kernel-based Virutal Machine which grows quickly in maturity and popularity in the Linux server market. Red Hat officially dropped Xen in favor of K...
VMware Workstation 10 Error Not enough physical memory is available to power this virtual machine
If you are using VMWare Workstation (or VMWare player) on Windows 8.1 and have just update Windows, specifically KB2995388, you may receive this error messag...
webserver
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
Integrating NODEJS and Kafka
Below are the list required to integrate NodeJS and Kafka. This is a simple HOWTO to get started.
Sending JSON to NodeJS to Multiple Topics in Kafka - using kafka-node.
Kafka-node is a Node.js client with Zookeeper integration for Apache Kafka 0.8.1 and later. The Zookeeper integration does the following jobs:
NodeJS Kafka Producer - Using kafka-node
Now that we have Kafka and NodeJS ready. Lets some data to our Kafka Cluster.
Sending JSON to NodeJS to Kafka.
What we are trying to achieve ?
Installing NodeJS on Centos 6.6.
Node.js is an open-source, cross-platform runtime environment for developing server-side web applications. Node.js applications are written in JavaScript and...
Custom Webserver/NodeJS sysctl.conf file.
Have updated and explanation in the conf file below.
Creating server parameter sysctl.conf for WebServers / FTP Server.
sysctl is an interface that allows you to make changes to a running Linux kernel. With /etc/sysctl.conf you can configure various Linux networking and system...
win
Creating Documents Using pandoc
Pandoc is an opensource utility to create documents from markdown. We can create PDF, Doc, doc, html and other formats. And can be also used to convert html ...
windows
Windows Testing Using Kitchen Chef
Kitchen-Vagrant has the capability to spin up a windows instance for testing. To make it work you will need the vagrant-winrm to be installted on the worksta...
Package Installer for Cygwin [apt-cyg].
After a longtime I was on my windows machine and had to make it feel more like my linux machine. So install the thing what everyone else does cygwin. Surpise...
Bootstrap Windows - knife-windows - Chef
knife-windows plugin adds additional functionality to the Chef Knife CLI tool for configuring / interacting with nodes running Microsoft Windows.
Update hosts file in Windows 8
Host file contains IP followed by the FQDN which can be used to reach that IP address. Host file takes precedence over your DNS servers. In Microsoft operati...
Creating a large file in Windows / Linux
Was working on a monitoring project, need to create a large file to test notifications. Here is how we can do that.
Chef Workstation Setup on Windows Machine.
The Chef Development Kit (ChefDK) brings the best-of-breed development tools built by the awesome Chef community to your workstation with just a few clicks. ...
VMware Workstation 10 Error Not enough physical memory is available to power this virtual machine
If you are using VMWare Workstation (or VMWare player) on Windows 8.1 and have just update Windows, specifically KB2995388, you may receive this error messag...
xml
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
xml-processing
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
yarn
Long Running Jobs in YARN distcp.
Usually distcp and other batch jobs run for a very long time. This is fine if you are running a HADOOP environment without kerberos. When we kerberize a clus...
ERROR - java heap space caused using distcp.
When you see this error default thing to do is the set the HADOOP_CLIENT_OPTS config on your env. In My case did a typo HADDOP_CLIENT_OPTS which caused us sp...
Setting you Hbase Cluster on Hadoop (YARN). Ubuntu 12.04 LTS
HBase is an open source, non-relational, distributed database modeled after Google’s BigTable and written in Java. It is developed as part of Apache Software...
yum
YUM Repository Creation on HTTPD Web Server.
Setting up yum repos on RHEL using httpd. We will be setting up httpd and yum repo on top of it. So that we can access yum over http.
zabbix
Nagios - Service Group Summary ERROR
We were working on nagios and found that after our migration, service group summary was not working. You might get below error on the screen and the solution...
Zabbix History Table Clean Up
Zabbix history table gets really big, and if you are in a situation where you want to clean it up. Then we can do so, using the below steps.
Zabbix Database Backup Script for postgres and mysql.
After the zabbix setup is done, we would like to take backup of the database. Here we are doing a complete backup. But if we are looking for only configurati...
Installing Zabbix Version 2.4 Offline (Zabbix Server without Internet).
There might be situations where you have a remote/zabbix server which does not have internet connectivity, due to security or other reasons. So we create a ...
Zabbix Template Creation using CSV file.
In zabbix we dont have a better way to capture snmptraps. we have to manually create an item and corresponfding trigger to handle a trap arriving from the de...
Installing SNMP Builder using zabbix-extra on Zabbix Version 2.4.
SNMP Builder/Extra is an add-in for Zabbix. It provides new web interface components to browse MIB trees and values. SNMP OIDs can then be automatically conv...
Setting up SNMP Trapper for Zabbix.
Receiving SNMP traps is the opposite to querying SNMP-enabled devices. In this case the information is sent from a SNMP-enabled device and is collected or “t...
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
Zabbix Installation 2.4 - CentOS 6.5
Zabbix is the ultimate enterprise-level software designed for monitoring availability and performance of IT infrastructure components. Zabbix is open source ...
Zabbix Hadoop Monitoring.
This script can be used to monitor Namenode Parameters. This script can be used to Generate Zabbix Import XML or Send monitoring data to Zabbix server.
Fetch Monitoring Data from Item to CSV file.
This section describes how to get monitoring data from Zabbix server through the command line and export these to a CSV formatted file.
Zabbix Item Creation using OID and Name CSV files.
This script is to create a xml import file from a csv file. We use 2 csv file for this.
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
Zabbix Import File from iReasoning Export CSV
Module used to generate Zabbix import xml for snmp traps, Below are steps to create a Zabbix Import for Traps. These traps are captured from the snmptrap fun...
zabbix-java-gateway
Installing zabbix-java-gateway on Centos 6.5
Zabbix 2.0 adds native support for monitoring JMX applications by introducing a new Zabbix daemon called Zabbix Java gateway. Zabbix Java gateway is a daemon...
zbxsend
Send KPI Data to Zabbix from XML KPI File
Send Zabbix metric by reading from a XML file. This needs package zbxsend from : https://github.com/ahmedzbyr/zbxsend
zookeeper
Cloudera Manager - Duplicate entry ‘zookeeper’ for key ‘NAME’.
Deployment error during setting zookeeper on a new cluster using Cloudera Manager UI, when an earlier cluster containing zookeeper earlier was built using Cl...
Setting Up HDFS Services Using Cloudera API [Part 3]
This is the second follow up post. In the earlier post
Setting Up Zookeeper Services Using Cloudera API [Part 2]
This is the second follow up post. In the earlier post Setting Up Cloudera Manager Services Using Cloudera API [Part 1] we install the cloudera management se...
Ansible Playbook - Setup Zookeeper Using tarball.
This is a simple zookeeper playbook, to quickly start zookeeper running on a single or more nodes, in a clustered mode.
Ansible Playbook - Setup Storm Cluster.
This is a simple Storm Cluster Setup. We are using a dedicated Zookeeper Cluster/Node, instead of the standalone zkserver. Below is how we will deploy our c...
Ansible Playbook - Setup Kafka Cluster.
This is a simple Kafka setup. In this setup we are running kafka over a dedicated zookeeper service. (NOT the standalone zookeeper which comes with kafka)