Install and Configure Puppet Master Server and Puppet Agent on Linux (RHEL 7/RHEL 8)

Published: 01 January 1970
on channel: Nehra Classes

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Puppet:
Puppet is an open source DevOps systems management tool for centralizing and automating the configuration management process.
It is used to configure, manage, deploy, and orchestrate various applications and services across the whole infrastructure of an organization.

Install & Configure Puppet Master & Client:

Puppet Server: (192.168.1.115)

1. Stop the firewall if you are using Virtual Machines in your own small private network, but it is not recommended in an organisation.
systemctl stop firewalld

2. Set the Master Server Hostname as Puppet, because clients use this name.
hostnamectl set-hostname puppet

3. Download the puppet.noarch rpm file to Create repo file, so that you can install packages from internet.
rpm -Uvh https://yum.puppetlabs.com/puppetlabs...

4. Install puppet master package using yum.
yum install -y puppetserver

5. Edit puppet master configuration file and change memory size to 512m from 2g, so that it doesn't cause problems.
gedit /etc/sysconfig/puppetserver
512m

6. Start the puppetserver service.
systemctl start puppetserver

7. Enable the puppetserver service, so that it can restart at its own as soon as the machine gets rebooted.
systemctl enable puppetserver

8. Verify the status of puppetserver service.
systemctl status puppetserver

Now go to Client: (192.168.1.116)

1. Set the hostname as client.
hostnamectl set-hostname client

2. Edit the hosts file and make the master server entry in it.
vim /etc/hosts
192.168.1.115 puppet puppet-master

3. Download the puppet.noarch rpm file to Create repo file, so that you can install packages from internet.
rpm -Uvh https://yum.puppetlabs.com/puppetlabs...

4. Install puppet agent using yum.
yum install -y puppet-agent

5. Check the client connectivity with master using telnet.
telnet puppet 8140
OR
telnet 192.168.1.115 8140

6. Start the puppet agent services using below command which will send a certificate to master server to get it signed.
/opt/puppetlabs/bin/puppet resource service puppet ensure=running enable=true

Move to Puppet Master:
1. List the certificates which are yet to get singed by master using below command.
/opt/puppetlabs/bin/puppet cert list

2. Sign the pending certificate using below command, so that we can use puppet.
/opt/puppetlabs/bin/puppet cert sign client

3. Recheck the certificates which are yet to get singed by master using below command.
/opt/puppetlabs/bin/puppet cert list

4. To see the details of all the certificates (pending & signed both).
/opt/puppetlabs/bin/puppet cert list -all

5. Create a sample file to check test the master puppet configuration.
touch /etc/puppetlabs/code/environments/production/manifests/sample.pp

Move to Client:

1. Test the client working, pull the test file created by master.
/opt/puppetlabs/bin/puppet agent --test

If everything goes OK then,

Move to Master:
1. Edit the test file and set any action to be performed on client using puppet. e.g. install httpd package on client using puppet, write this code and save the file.
vim /etc/puppetlabs/code/environments/production/manifests/sample.pp
node 'client' {
package{ 'httpd' :
ensure = installed,
}
}

Move to Client:
1. Again pull the request from the master.
/opt/puppetlabs/bin/puppet agent --test

2. Start httpd service.
#systemctl start httpd

3. Open Web Browser =) Write localhost in address bar
It will show you the http webpage, it means httpd package got successfully installed through puppet on client machine.

We are done.
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