Block块

多个action组装成块，可以根据不同条件执行一段语句 ：

  1.  tasks:
  2.      - block:
  3.          - yum: name={{ item }} state=installed
  4.            with_items:
  5.              - httpd
  6.              - memcached
  8.          - template: src=templates/src.j2 dest=/etc/foo.conf
  10.          - service: name=bar state=started enabled=True
  12.        when: ansible_distribution == 'CentOS'
  13.        become: true
  14.        become_user: root

组装成块处理异常更方便：

  1. tasks:
  2.   - block:
  3.       - debug: msg='i execute normally'
  4.       - command: /bin/false
  5.       - debug: msg='i never execute, cause ERROR!'
  6.     rescue:
  7.       - debug: msg='I caught an error'
  8.       - command: /bin/false
  9.       - debug: msg='I also never execute :-('
  10.     always:
  11.       - debug: msg="this always executes"