configure_vlans.yml

---
- name: "Configure VLANS and SVI's on switches"
  hosts: "all"
  collections:
    - "ansible.netcommon"
  tasks:

    - name: "Store template path var per device type"
      set_fact:
        template_path: "templates/{{ ansible_network_os }}_vlans.j2"

    - name: "Print Template path"
      debug:
        msg: "{{template_path}}"

    - name: "Apply config updates from j2 templates"
      cli_config:
        config: "{{ lookup('template', template_path) }}"
      register: "vlan_updates"
      notify: "changes_occurred"

  handlers:
    # Arista supports on-box diff - yeilds a 'diff' key in the response if a change is made.
    # S4#diff running-config startup-config
    - name: "Print on-box diff when changes occur"
      listen: "changes_occurred"
      debug:
        msg: "{{ vlan_updates['diff'].split('\n') }}"
      when: "'diff' in vlan_updates"

    # Cisco IOS and NXOS do not support on-box diff - yields a 'commands' key in the response since no on-box diff if a change is made.
    - name: "Print commands issued when changes happen (no on-box diff)"
      listen: "changes_occurred"
      debug:
        var: "vlan_updates.commands"
      when: "'commands' in vlan_updates"

    # Save changes
    - name: "Save Configuration when changes occur"
      listen: "changes_occurred"
      cli_command:
        command: "copy running-config startup-config"