判断语句 之 执行结果判断

常常用于判断前一个命令执行的结果.

参数	释义	示例
success	执行状态为成功为真	when: result is success
succeeded
failure	执行状态为失败为真	when: result is failure
failed
change	执行状态为change为真	when: result is chang
changed
skip	执行状态为skip为真	when result is skip
skipped

- hosts: all
  vars:
  - username: test1
  tasks:
  - name: detect whether the user exists
    shell:
      id {{ username }}
    register: result
    ignore_errors: true
  - name: debug
    debug:
      msg: "{{ username }} exsist,nothing to do"
    when: result is success
  - name: user add {{ username }}
    user:
      name: "{{ username }}"
      state: present
    when: result is failure