rhel-to-oel-switch.yaml

- hosts: all
  become: yes
  become_user: root
  become_method: sudo
  remote_user: sys-admin

  vars:
    rhel_release:
    - redhat-release 
    - redhat-release-eula

  tasks:
   - name: Uninstall unnecessary Packages
     shell: rpm -e --nodeps {{ rhel_release }} 

   - name: Install Oracle Linux Release for OEL 7
     shell: rpm -i https://yum.oracle.com/repo/OracleLinux/OL7/latest/x86_64/getPackage/oraclelinux-release-el7-1.0-17.el7.x86_64.rpm
     when: (ansible_facts['distribution'] == "RedHat" and ansible_facts['distribution_major_version'] == "7")

   - name: Install Oracle Linux Release for OEL 8
     shell: rpm -i https://yum.oracle.com/repo/OracleLinux/OL8/baseos/latest/x86_64/getPackage/oraclelinux-release-el8-1.0-38.el8.x86_64.rpm
     when: (ansible_facts['distribution'] == "RedHat" and ansible_facts['distribution_major_version'] == "8")

   - name: Install Oracle Linux Release for OEL 9
     shell: rpm -i https://yum.oracle.com/repo/OracleLinux/OL9/baseos/latest/x86_64/getPackage/oraclelinux-release-el9-1.0-15.el9.x86_64.rpm
     when: (ansible_facts['distribution'] == "RedHat" and ansible_facts['distribution_major_version'] == "9")

   - name: Install oraclelinux-release package
     yum:
      name: oraclelinux-release 
      state: latest

   - name: Switch OS from RHEL to OEL
     shell: yum -y distro-sync

   - name: Remove Unnecessary Pacakages
     yum:
      name: 
       - subscription-manager 
       - insights-client
      state: absent

   - name: Rebuild the initial RAM filesystem
     shell: dracut -f

   - name: Reboot Machine after OS Version Switch
     reboot:
      pre_reboot_delay: 5
      post_reboot_delay: 30
      reboot_timeout: 300
      msg: "Reboot initiated by Ansible after OS Version Switch"
      test_command: w