PUPPET INSTALLATION AND CONFIGURATIONS

Step 1 :-

Install RHEL EPEL repository on Centos 6.x on each system 

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
wget http://rpms.famillecollet.com/enterprise/remi-release-6.rpm
sudo rpm -Uvh remi-release-6*.rpm epel-release-6*.rpm

Step 2 :- 
Install Puppet on system 
On Master sever :- 
[root@PUPPET-MASTER ] # yum install puppet-server
[root@PUPPET-MASTER ] # /etc/init.d/puppetmaster start
On  all client agent system  :- 
[root@PUPPET-CLIENT1 ~] # yum install puppet
[root@PUPPET-CLIENT1 ~] # /etc/init.d/puppet restart

Step 3 :-

Configuration

On all client agent system :-

[root@PUPPET-CLIENT1 ~] # vim /etc/puppet/puppet.conf

Add below parameter into agent section

server = PUPPET-MASTER

runinterval = 120

[root@PUPPET-CLIENT1 ~] # /etc/init.d/puppet restart

Step 4 :-

On Master sever :-
List all cerificates from all clinet connected to server.
[root@PUPPET-MASTER ] # puppetca -l
  "PUPPET-CLIENT1" (E3:2B:85:FD:56:2E:34:A3:E0:FF:7A:33:3A:36:33:8C)
Sign all cerificate using below command 
[root@PUPPET-MASTER ] # puppetca -s PUPPET-CLIENT1

Step 5 :-

On all client agent system

[root@PUPPET-CLIENT1 ~] # puppet agent --test
info: Caching catalog for ug-th-0215-nn
notice: Finished catalog run in 0.10 seconds
[root@PUPPET-CLIENT1 ~] #

Above command say successful connection to sever with certificate .

Step 6 :-

Push customize conf files from master to server.
[root@PUPPET-MASTER ] # vim  /etc/puppet/manifests/site.pp
Add below entry into site.pp
import 'nodes.pp'

Step 7 :-

Create nodes.pp file 
[root@PUPPET-MASTER ] # vim  /etc/puppet/manifests/nodes.pp 
node 'PUPPET-CLIENT1' {
include nginx
}

node 'PUPPET-CLIENT2' {
include nginx
}

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Step 8 :-

[root@PUPPET-MASTER ] # mkdir -p /etc/puppet/modules/nginx/{manifests,files}

lets create the nginx class file which lives in /etc/puppet/modules/nginx/manifests/init.pp

[root@PUPPET-MASTER ] # vim /etc/puppet/modules/nginx/manifests/init.pp

# Manage nginx webserver

class nginx {

package { 'nginx':

ensure => installed,

}

service { 'nginx':

ensure => running,

}

file { 'nginxconfig':

name => '/etc/nginx/nginx.conf',

source => 'puppet:///modules/nginx/nginx.conf',

}

}

Add customize file into /etc/puppet/modules/nginx/files/

Step 9 :-

[root@PUPPET-MASTER ] # puppet apply /etc/puppet/manifests/site.pp

Step 10 :-

Login to client system and check for /etc/nginx/nginx.conf you will get your customize file , it will take 2 min to update client system. 

Step 11(Optional) :-

Hadoop Manifests

# Make sure /etc/puppet/module/ have permission of puppet puppet , unzip your hadoop file /etc/puppet/modules/hadoop/files/


class hadoop{


group { "hadoop":
        ensure => present,
        gid    => 1000,
}

user { "hadoop":
        ensure     => present,
        shell      => "/bin/bash",
       managehome        =>  true,
home => "/home/hadoop",
password => '$1$jE8T0sFs$PMKB4bfP21IRqzZ14mwTR/',
}

file { "Hadoophome":
name   => "/home/hadoop",
  ensure => "directory",
         owner  => "hadoop",
         group  => "hadoop",
         mode   => 700,
}

file { "hadoopconf":
name => "/usr/local/hadoop",
recurse => true,
ensure => "directory",
         owner  => "hadoop",
         group  => "hadoop",
mode   => 755,
source => 'puppet:///modules/hadoop/hadoop/',

}

}