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CentOS 6.2 - Installing & Configuring Puppet 2.6 - A Quick Reference


Puppet is a Ruby-based, open source framework licensed as GPL v2 and toolset for managing the configuration of computer systems. Puppet can be configured and integrated into infrastructure as part of provisioning and management lifecycle. Puppet allows us to configure it in a client-server environment as well as a stand alone server. Puppet can be rated as a first class Linux, UNIX citzen as a configuration management tool but it can be used to moinitor Linux, UNIX, Windows and OSX platforms. Moreover it also allows you to integrate it with Nagios for creating a complete monitoring and configuration management solution.


You need to install some prerequisites (such as the Ruby programming language, the Ruby libraries and the Ruby Shadow library)


yum install ruby ruby-libs ruby-shadow


Install the EPEL repo RPM:

rpm -Uvh


Check if it is listed:

yum repolist


Install Yum priorities package:

yum install yum-priorities


Edit the file /etc/yum.repos.d/epel.repo and add the line below under the [epel] section.



Open vi /etc/hosts and add: server1


On the master, you need to install the puppet, puppet-server, and facter packages from the EPEL repository. The puppet package contains the agent, the puppet-server package contains the master, and the facter package contains the system inventory tool Facter. Facter gathers information, or “facts,” about your hosts that are used to help customize your Puppet configuration.

yum install puppet puppet-server facter


On the agent, you only need to install the prerequisites and the puppet and facter packages.

yum install puppet facter


puppet.conf has

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three sections [agent] to configure Puppet agent, [master] to configure Puppet master and [main] where all other options are configured by all the components. Now open /etc/puppet/puppet.conf file,


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look for [master] entry and add below: would be replaced with your FQDN host name.


In /etc/puppet/puppet.conf, add the below line to [main] section:

moduledir = /etc/puppet/modules:/var/lib/puppet/modules


Start the puppet master:

/etc/init.d/puppetmasterd #You can also run 'puppet master --verbose --no-daemonize' for debugging purpposes.


On Client:

puppet agent --no-daemonize --verbose


On puppet master server:

puppet cert --list #it will list all the certificates waiting to be signed.



On puppet master sign the certificate:

puppet cert --sign server1.locl #Or puppet cert --sign --all to sign all the certifcates waiting to be signed.


On puppet master, now we will create a /etc/puppet/mainifests/site.pp file which

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basically instructs puppet clients to load configuration. Configuration files using a puppet configuration language which basically wraps puppet components. Create /etc/puppet/manifests/site.pp


touch /etc/puppet/manifests/site.pp

import 'nodes.pp'

$puppetserver = ''


Create an nodes.pp file in /etc/puppet/manifests/nodes.pp:

touch /etc/puppet/manifests/nodes.pp

node 'server1.locl' {

include perl


node 'server1.locl' can also be replaced to node '*' to define all the nodes at once. Each module needs a specific directory structure and a file called init.pp. We will create module dir as well as our first modules 'bash' which we have previously defined in nodes.pp file and an init.pp file:

mkdir -p /etc/puppet/modules/perl/{files,templates,manifests}

touch /etc/puppet/module/perl/manifests/init.pp

Add the following code into your init.pp:

class perl {

$packagelist = ["perl", "mod_perl" ]

package { $packagelist:

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ensure => "installed"




Config files like init.pp are stored in the manifests directory. If we want to provide any files as part of our module we can store them in the files directory. If you want to use a template with your module that can be included in the template directory.


Firwall rule for the port 8140:

iptables -A INPUT -p tcp -m state --state NEW -s --dport 8140 -j ACCEPT


Note: In case you don't fine puppet.con file in /etc/puppet/puppet.conf you can create a simple file using the following command:

puppetmasterd --genconfig > puppet.conf




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