当我们想在满足一个条件下,执行多个任务时,就需要分组了。而不再每个任务都要用when。
tasks:
- block:
- command: echo 1
- shell: echo 2
- raw: echo 3
when: ansible_distribution == 'CentOS'
错误处理
tasks:
- block:
- debug: msg='i execute normally'
- command: /bin/false
- debug: msg='i never execute, cause ERROR!'
rescue:
- debug: msg='I caught an error'
- command: /bin/false
- debug: msg='I also never execute :-('
always:
- debug: msg="this always executes"
block中的任务在执行中,如果有任何错误,将执行rescue中的任务。 无论在block和rescue中发生或没有发生错误,always部分都运行。
发生错误后,运行handlers
tasks:
- block:
- debug: msg='i execute normally'
notify: run me even after an error
- command: /bin/false
rescue:
- name: make sure all handlers run
meta: flush_handlers
handlers:
- name: run me even after an error
debug: msg='this handler runs even on error'
测试的时候,设置meta: flush_handlers时,handlers 不执行,rescue的任务还是执行的。