Manage maintenance mode on Arista EOS with Ansible

- name: Manage maintenance mode
  hosts: all
  gather_facts: false
  tasks:
      # Enable
    - name: Check maintenance mode
      arista.eos.eos_command:
        commands: show maintenance | json
      register: maintenance_mode_check_before_output
    - name: Enable maintenance mode
      when: >
        maintenance_mode_check_before_output.stdout[0].units.System.adminState != 'underMaintenance'
        and
        maintenance_mode_check_before_output.stdout[0].units.System.state != 'underMaintenance'
      arista.eos.eos_config:
        lines:
          - quiesce
        parents:
          - maintenance
          - unit System
        save_when: changed
    
    - name: Wait for full maintenance mode
      arista.eos.eos_command:
        commands: show maintenance | json
      register: result
      until: >
        result.stdout[0].units.System.adminState == 'underMaintenance'
        and
        result.stdout[0].units.System.state == 'underMaintenance'
      retries: 36          # 36 × 10s = 360s max wait time.  Arista default is 300 seconds.
      delay: 10
      changed_when: false
      
    # Disable
    - name: Check maintenance mode
      arista.eos.eos_command:
        commands: show maintenance | json
      register: maintenance_mode_check_after_output
    
    - name: Disable maintenance mode
      when: maintenance_mode_check_after_output.stdout[0].units.System.adminState == 'underMaintenance'
      arista.eos.eos_config:
        lines:
          - no quiesce
        parents:
          - maintenance
          - unit System
        save_when: changed