Installing Puppet on RHEL 7 / CentOS 7

Installing Puppet Server

Enable the Puppet platform Yum repo
rpm -Uvh https://yum.puppet.com/puppet6-release-el-7.noarch.rpm
Install puppet server
yum install puppetserver
Memory Configuration for puppet
By default, Puppet Server is configured to use 2GB of RAM. If your server has less than 2 GB of RAM, then configure less memory by editing JAVA_ARGS parameter.
vi /etc/sysconfig/puppetserver JAVA_ARGS="-Xms2g -Xmx2g" Example: For Setting Memory to 1 GB JAVA_ARGS="-Xms1g -Xmx1g" For Setting Memory to 512 MB JAVA_ARGS="-Xms512m -Xmx512m"
Start and Enable puppet server service
systemctl start puppetserver systemctl enable puppetserver

Installing Puppet Agent on Client Servers

Enable the Puppet platform Yum repo
rpm -Uvh https://yum.puppet.com/puppet6-release-el-7.noarch.rpm
Configure PATH Environment Variable
Run the following command to source script that puppet-agent has installed
source /etc/profile.d/puppet-agent.sh
Configure puppet server setting
puppet config set server puppet-master.example.com --section main
Enable puppet agent service
puppet resource service puppet ensure=running enable=true

Puppet Server Signing Agent Certificates

List the certificates pending for signing
/opt/puppetlabs/bin/puppetserver ca list
Sign all Agent Certificates
/opt/puppetlabs/bin/puppetserver ca sign --all
Puppet Server Deployment Configuration
Add the puppet configuration to following file which you want to push to all your client agents.
vi /etc/puppetlabs/code/environments/production/manifests/site.pp

Testing connection from puppet Agent to puppet server

• Login to the puppet Agent server and run following command to test Agent connection with puppet server.
puppet agent --test