第 27 章 Managing systemd units by using RHEL system roles

Procedure

1. Create a playbook file, for example, ~/playbook.yml, with the following content. Use only the variables depending on what actions you want to perform.

   ---
   - name: Managing systemd services
     hosts: managed-node-01.example.com
     tasks:
       - name: Perform action on systemd units
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.systemd
         vars:
           systemd_started_units:
             - <systemd_unit_1>.service
           systemd_stopped_units:
             - <systemd_unit_2>.service
           systemd_restarted_units:
             - <systemd_unit_3>.service
           systemd_reloaded_units:
             - <systemd_unit_4>.service
           systemd_enabled_units:
             - <systemd_unit_5>.service
           systemd_disabled_units:
             - <systemd_unit_6>.service
           systemd_masked_units:
             - <systemd_unit_7>.service
           systemd_unmasked_units:
             - <systemd_unit_8>.service

   For details about all variables used in the playbook, see the /usr/share/ansible/roles/rhel-system-roles.systemd/README.md file on the control node.

2. Validate the playbook syntax:

   $ ansible-playbook --syntax-check ~/playbook.yml

   Note that this command only validates the syntax and does not protect against a wrong but valid configuration.

3. Run the playbook:

   $ ansible-playbook ~/playbook.yml