Install Puppet agent and cloud-init on RHEL 8 (CentOS, RockyLinux, AlmaLinux)

setup_server.sh

#!/usr/bin/env bash

set -e

# Ensure the script is running as root	
if [[ "$(id -u)" != '0' ]]; then	
  exec sudo "${BASH_SOURCE[0]:-$0}" "$@"	
fi

try_install() {
  if ! command -v $1 &> /dev/null; then
    echo "===> Installing ${1}"
    dnf install -y $1
  fi
}

# Update the system
echo "===> Updating system"
dnf upgrade -y --refresh

# Install a release package to enable Puppet Platform repositories
echo "===> Installing Puppet release packages"
dnf install -y https://yum.puppet.com/puppet7-release-el-8.noarch.rpm
dnf install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

# Install puppet agent
echo "===> Installing Puppet agent"
dnf install -y puppet-agent

# Install cloud-init if it is not already present
try_install cloud-init

# Enable the puppet agent to start on next boot
systemctl enable puppet

# Reset cloud-init
cloud-init clean

echo "===> Done"