第 28 章 Configuring time synchronization by using RHEL system roles

Procedure

1. Create a playbook file, for example, ~/playbook.yml, with the following content:

   ---
   - name: Managing time synchronization
     hosts: managed-node-01.example.com
     tasks:
       - name: Configuring NTP with an internal server (preferred) and a public server pool as fallback
         ansible.builtin.include_role:
           name: redhat.rhel_system_roles.timesync
         vars:
           timesync_ntp_servers:
           - hostname: time.example.com
             trusted: yes
             prefer: yes
             iburst: yes
           - hostname: 0.rhel.pool.ntp.org
             pool: yes
             iburst: yes

   The settings specified in the example playbook include the following:

   pool: <yes|no>

   Flags a source as an NTP pool rather than an individual host. In this case, the service expects that the name resolves to multiple IP addresses which can change over time.

   iburst: yes

   Enables fast initial synchronization.

   For details about all variables used in the playbook, see the /usr/share/ansible/roles/rhel-system-roles.timesync/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