rh358/cr-services/deploy_varnish.yml

---
- name: Ensure Varnish is deployed
  hosts: serverb.lab.example.com
  gather_facts: false
  become: true

  tasks:
    - name: the varnish package is installed
      yum:
        name: varnish
        state: present

    - name: the systemd drop-in directory exists
      file:
        path: /etc/systemd/system/varnish.service.d
        state: directory

    - name: the varnish systemd service configuration file is deployed
      copy:
        # You need to create that configuration file
        src: files/port.conf
        dest: /etc/systemd/system/varnish.service.d/port.conf
      notify:
        - reload systemd
        - restart varnish

    - name: the Varnish configuration file is deployed
      copy:
        # You need to complete that configuration file
        src: files/default.vcl
        dest: /etc/varnish/default.vcl
      notify: restart varnish

    - name: the varnish service is started and enabled
      service:
        name: varnish
        state: started
        enabled: yes

    - name: the port 9000 is opened in the firewall
      firewalld:
        port: 9000/tcp
        state: enabled
        immediate: yes
        permanent: yes

  handlers:
    - name: reload systemd
      systemd:
        daemon_reload: yes

    - name: restart varnish
      service:
        name: varnish
        state: restarted