內容集的角色文件

1. 查詢可用的 RHEL system roles。

   [deyu1@kvm19 ansible]$ ls collections/ansible_collections/rhel/system_roles/roles
   certificate                       private_metrics_subrole_elasticsearch
   cockpit                           private_metrics_subrole_grafana
   crypto_policies                   private_metrics_subrole_mssql
   firewall                          private_metrics_subrole_pcp
   ha_cluster                        private_metrics_subrole_postfix
   kdump                             private_metrics_subrole_redis
   kernel_settings                   private_metrics_subrole_repository
   logging                           private_metrics_subrole_spark
   metrics                           selinux
   nbde_client                       ssh
   nbde_server                       sshd
   network                           storage
   postfix                           timesync
   private_logging_subrole_rsyslog   tlog
   private_metrics_subrole_bpftrace  vpn
   

2. 查看角色 timesync 的使用文件，其中範例如下：

   [deyu1@kvm19 ansible]$ grep ^Example -A17 ....../system_roles/roles/timesync/README.md
   Example Playbook
   ----------------
   
   Install and configure ntp to synchronize the system clock with three NTP servers:
   
   “`yaml
   - hosts: targets
     vars:
       timesync_ntp_servers:
         - hostname: foo.example.com
           iburst: yes
         - hostname: bar.example.com
           iburst: yes
         - hostname: baz.example.com
           iburst: yes
     roles:
       - rhel.system_roles.timesync
   “`