Install Puppet agent on App Server03 and make service is running.
Solution:
First of all, enable the Puppet 5 Platform repository:
sudo rpm -Uvh https://yum.puppet.com/puppet5-release-el-7.noarch.rpm
SSH to stapp03 and install puppet:
sudo yum update -y
sudo yum install y puppet-agent
Start and enable service:
sudo systemctl start puppet && sudo systemctl enable puppet