Ansible在2.0版本引入块功能,块功能可以将任务进行分组,并且可以块级别上应用任务变量,同时支持在块内进行异常处理
常用语法:
- block:定义块
rescue:当出现异常时,执行的语句
always:无论结果如何都要执行的语句
块用法示例:
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[root@nfs-server playbook] # cat block.yml
--- - hosts: webservers remote_user: root
gather_facts: True
tasks:
- block:
- service: name={{ item }} state=stopped
with_items:
- nginx
- httpd
- memcached
tags:
- stop_application
- yum: name={{ item }} state=absent
with_items:
- nginx
- httpd
- memcached
tags:
- remove_soft
when: ansible_os_family == 'RedHat'
[root@nfs-server playbook] # ansible-playbook block.yml
PLAY [webservers] ************************************************************************************************************************************** TASK [Gathering Facts] ********************************************************************************************************************************* ok: [192.168.2.111] ok: [192.168.2.101] TASK [service] ***************************************************************************************************************************************** changed: [192.168.2.101] => (item=nginx) changed: [192.168.2.111] => (item=nginx) ok: [192.168.2.101] => (item=httpd) ok: [192.168.2.111] => (item=httpd) changed: [192.168.2.111] => (item=memcached) changed: [192.168.2.101] => (item=memcached) TASK [yum] ********************************************************************************************************************************************* changed: [192.168.2.101] => (item=[u 'nginx' , u 'httpd' , u 'memcached' ])
changed: [192.168.2.111] => (item=[u 'nginx' , u 'httpd' , u 'memcached' ])
PLAY RECAP ********************************************************************************************************************************************* 192.168.2.101 : ok=3 changed=2 unreachable=0 failed=0 192.168.2.111 : ok=3 changed=2 unreachable=0 failed=0
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本文转自激情燃烧的岁月博客51CTO博客,原文链接http://blog.51cto.com/liuzhengwei521/1962666如需转载请自行联系原作者 weilovepan520 |