Question

How to Install Puppet on CentOS?

Answer 1

You need two nodes for Puppet to work, one Puppet master and one is Puppet agent. IIn this case there will be one puppet master and one puppet agent.

Create a CentOS node which will act as the master

Look at available timezones

timedatectl list-timezones

Select the one that suits you

sudo timedatectl set-timezone America/New_York

Install NTP

sudo yum -y install ntp
sudo ntpdate pool.ntp.org

Start NTP

sudo systemctl restart ntpd
sudo systemctl enable ntpd

Install Puppet Server

sudo rpm -ivh https://yum.puppetlabs.com/puppetlabs-release-pc1-el-7.noarch.rpm
sudo yum -y install puppetserver 

Configure memory allocations. Go to this file and chnage the JAVA_ARGS

sudo vi /etc/sysconfig/puppetserver
JAVA_ARGS="-Xms3g -Xmx3g"

Start Puppet Server

sudo systemctl start puppetserver
sudo systemctl enable puppetserver

Install Puppet Agent

sudo systemctl enable puppetserver
sudo yum -y install puppet-agent
sudo /opt/puppetlabs/bin/puppet resource service puppet ensure=running enable=true

Sign Certificate

List all the certificates

sudo /opt/puppetlabs/bin/puppet cert list

Sign them

sudo /opt/puppetlabs/bin/puppet cert sign certificate_name

or sign all of them

sudo /opt/puppetlabs/bin/puppet cert sign --all

And you're done:)