模組文件

1. 查詢 cron 模組文件。

   [deyu1@kvm19 ansible]$ ansible-doc cron
   

2. 查詢 cron 模組文件的範例，2點及5點執行 "ls -alh > /dev/null"。

   [deyu1@kvm19 ansible]$ ansible-doc cron | grep ^EX -A55
   EXAMPLES:
   
   - name: Ensure a job that runs at 2 and 5 exists. Creates an entry like 
   		"0 5,2 * * ls -alh > /dev/null"
     ansible.builtin.cron:
       name: "check dirs"
       minute: "0"
       hour: "5,2"
       job: "ls -alh > /dev/null"
   

3. 刪除名為 "an old job" 的例行性工作。

   - name: 'Ensure an old job is no longer present. Removes any job that is
   		prefixed by "#Ansible: an old job" from the crontab'
     ansible.builtin.cron:
       name: "an old job"
       state: absent
   

4. 新增一個cron job，在 reboot 時執行 "/some/job.sh"。

   - name: Creates an entry like "@reboot /some/job.sh"
     ansible.builtin.cron:
       name: "a job for reboot"
       special_time: reboot
       job: "/some/job.sh"
   

5. 在 crontab 的最上方新增一行 "PATH=/opt/bin"。

   - name: Creates an entry like "PATH=/opt/bin" on top of crontab
     ansible.builtin.cron:
       name: PATH
       env: yes
       job: /opt/bin
   

6. 在 PATH 宣告行後面新增一行 "APP_HOME=/src/app"。

   - name: Creates an entry like "APP_HOME=/srv/app" and insert it after PATH declaration
     ansible.builtin.cron:
       name: APP_HOME
       env: yes
       job: /srv/app
       insertafter: PATH
   

7. 在 /etc/cron.d 目錄下新增一個例行性工作檔ansible_yum-autoupdate，每星期二12點整執行job。

   - name: Creates a cron file under /etc/cron.d
     ansible.builtin.cron:
       name: yum autoupdate
       weekday: 2
       minute: 0
       hour: 12
       user: root
       job: "YUMINTERACTIVE=0 /usr/sbin/yum-autoupdate"
       cron_file: ansible_yum-autoupdate
   

8. 刪除 /etc/cron.d 目錄下的例行性工作檔ansible_yum-autoupdate。

   - name: Removes a cron file from under /etc/cron.d
     ansible.builtin.cron:
       name: "yum autoupdate"
       cron_file: ansible_yum-autoupdate
       state: absent
   

9. 刪除 crontab 的環境變數 "APP_HOME=/src/app"。

   - name: Removes "APP_HOME" environment variable from crontab
     ansible.builtin.cron:
       name: APP_HOME
       env: yes
       state: absent
   

10. 建立一個不安全的 cron。

    - name: Create an insecure cron
      ansible.builtin.cron:
        path: /work
        owner: root
        group: root
        mode: '1777'