Recent Posts

March, 2016

  • 10 March

    VMware Integrated Openstack – Overview – Part 1

    What is the best technology to pair with openstack

    This articles provides the overview of VMware Integrated Openstack (VIO). Openstack is an opensource framework for creating an IAAS (Infrastructure as a service) cloud. It provides a cloud style API to simplify the consumption of virtual infrastructure technologies. Openstack doesn’t not provide any virtual technologies  to create the OS instances.  It always require hypervisors like KVM, XEN and ESXi. Openstack has …

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February, 2016

  • 21 February

    Puppet – Puppet Forge Modules – Overview

    Puppet Forge Modules

    Puppet forge is a module repository for  Puppet Open Source and Puppet Enterprise IT automation software. These modules are written by puppet community members and puppet reviews the module before publishing it. Puppet also supports many of modules in this repository.  Why do we require pre-built puppet modules ?  To simply system administrator work and reduce the coding effort. These …

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  • 20 February

    Puppet – How to Classify the Node types ?

    Puppet Classying OS variant

    We need to classify the nodes  when you have to perform similar operation on different OS variant. For an example, If you want to install Apache package on Linux systems, you need to use package name as “httpd” on Redhat variants  and “apache2” on Debian variants.  In such a cases, you need to tweak your module to detect the OS family …

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  • 20 February

    Puppet – Augeas – Edit System configuration files

    Puppet Augeas

    This article is going to demonstrates that editing/updating files on puppet agent nodes. In the previous article , we have seen that how to copy the static files from “module/files” directory(Puppet Server) to puppet agent nodes.  But sometimes , you can’t replace the complete file and you may need to edit specific line on that. For example you may just want to …

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  • 14 February

    Puppet – Manifest examples – Managing FILES – SERVICES

    Puppet Manifest - Manage service files directories

    This article is going to brief about creating new files , directories, changing the file permission, installing package and managing the services using puppet server on puppet agent nodes. For an example, if you want to configure the ntp client on 100’s of servers , you could simply write a small manifest on puppet server to achieve this task. This …

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  • 14 February

    Puppet – Writing a First Manifest – Modules

    Puppet- Writing Manifest and Module

    It’s time to write first manifest on the puppet server. This article is going to brief about writing a custom  puppet script  to automate the installation of httpd/Apache package on Linux servers. Similar way you can automate package installation, updating files, configuring services and many more. Resources are defined using resource  declaration syntax  and stored on file with .pp extension. …

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  • 13 February

    Puppet Server – Code and Configuration Directories

    Puppet server directories structure

    This article will brief about the puppet server’s directory architecture and important configuration files.  We can classify the puppet server directories  as  1. Code Directory and Data  Directory   2. Config directory. Puppet’s code directory is a main directory to store the code and data.  It contains environments which stores manifests and modules.  Manifest directory contains site.pp and nodes.pp files which helps you to …

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  • 12 February

    Puppet – Resource Declaration – Overview

    Puppet Resource Declaration

    Resources are essential unit to perform the system configuration. Each resource will describe the particular thing in puppet. For an example,  specific user needs to be created or specific file needs to be updated across the puppet agent nodes. When you would like to manage the users, “user” resource type will come in to play. If you want to modify specific file, you need …

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