Puppet Installation

--Public DNS
ec2-10-10-10-10.compute-1.amazonaws.com
ec2-20-20-20-20.compute-1.amazonaws.com
ec2-30-30-30-30.compute-1.amazonaws.com
ec2-40-40-40-40.compute-1.amazonaws.com

--Private DNS
ip-50-50-50-50.ec2.internal
ip-60-60-60-60.ec2.internal
ip-70-70-70-70.ec2.internal
ip-80-80-80-80.ec2.internal

--Download Puppet on all nodes
wget https://apt.puppetlabs.com/puppet5-release-xenial.deb
sudo dpkg -i puppet5-release-xenial.deb
sudo apt update

--Install puppetserver on Puppet Master

sudo apt-get install puppetserver

--Install agents on 3 nodes

sudo apt-get install puppet-agent

--Update Puppet configuration

sudo vi /etc/puppetlabs/puppet/puppet.conf

server=ip-50-50-50-50.ec2.internal

runinterval = 1800

--Start Puppet server
sudo service puppetserver start

--Start Puppet agent
sudo /opt/puppetlabs/bin/puppet resource service puppet ensure=running enable=true

--Sign Certificates

sudo /opt/puppetlabs/bin/puppet cert list

sudo /opt/puppetlabs/bin/puppet cert sign ip-60-60-60-60.ec2.internal
sudo /opt/puppetlabs/bin/puppet cert sign ip-70-70-70-70.ec2.internal
sudo /opt/puppetlabs/bin/puppet cert sign ip-80-80-80-80.ec2.internal

Puppet Concepts with Tomcat Installation

--Private DNS
ip-10-10-10-10.ec2.internal (Master)
ip-20-20-20-20.ec2.internal (Agent 1)
ip-30-30-30-30.ec2.internal (Agent 2)
ip-40-40-40-40.ec2.internal (Agent 3)

--Create module tomcat
cd /etc/puppetlabs/code/environments/production/modules

mkdir tomcat

--Create manifest folder

cd tomcat

mkdir manifests

--Create init.pp (class name should match the name of the module)

vi init.pp

class tomcat {
}

--Create install.pp

vi install.pp

class tomcat::install {

 package{'tomcat8':
  ensure => installed
 } 
 
 package{'tomcat8-admin':
  ensure => installed
 }
 
}

--Create start.pp

vi start.pp

class tomcat::start{

 service{'tomcat8' :
  ensure => running
 }
 
}

--Node assignments

cd /etc/puppetlabs/code/environments/production/manifests

vi tomcat.pp

node 'ip-20-20-20-20.ec2.internal' {
 include tomcat::install
 include tomcat::start
}

--To run agent "pull" on as needed basis

sudo /opt/puppetlabs/bin/puppet agent --test

--Create config.pp

cd /etc/puppetlabs/code/environments/production/modules/tomcat/manifests

vi config.pp

class tomcat::config {
 
 file { '/etc/tomcat8/tomcat-users.xml':
  source   => 'puppet:///modules/tomcat/tomcat-users.xml',
  owner    => 'tomcat8', 
  group    => 'tomcat8', 
  mode     => '0600',
  notify   => Service['tomcat8'] 
 }
 
}


--Copy tomcat-users.xml file


--Add config to tomcat.pp

cd /etc/puppetlabs/code/environments/production/manifests

vi tomcat.pp

node 'ip-20-20-20-20.ec2.internal' {
 include tomcat::install
 include tomcat::config
 include tomcat::start
}