仅在需要升级时停止服务的 Ansible 方法 [英] Ansible way to stop a service only if it needs to be upgraded
本文介绍了仅在需要升级时停止服务的 Ansible 方法的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在 ansible playbook 中,如果需要升级,我想停止 MariaDB(在我的情况下,从 RPM 包重新启动并不总是有效).我对 ansible 很陌生.
In an ansible playbook I want to stop MariaDB if an upgrade is needed (restart from the RPM package does not always work in my situation). I'm quite new to ansible.
我想出了这个:
- name: "Check if MariaDB needs to be upgraded"
shell: "yum check-update MariaDB-server|grep MariaDB|wc -l"
register: needs_update
- name: "Stop mysql service"
service:
name: mysql
state: stopped
when: needs_update.stdout == "1"
有没有比执行 shell 命令更好的方法呢?运行它时,我收到警告:
Is there a better way to do this then by executing a shell command? When running it I get warnings:
TASK [mariadb_galera : Check if MariaDB needs to be upgraded] ******************
changed: [139.162.220.42] => {"changed": true, "cmd": "yum check-update MariaDB-server|grep MariaDB|wc -l", "delta": "0:00:00.540862", "end": "2017-03-01 13:03:34.415272", "rc": 0, "start": "2017-03-01 13:03:33.874410", "stderr": "", "stdout": "0", "stdout_lines": ["0"], "warnings": ["Consider using yum module rather than running yum"]}
[WARNING]: Consider using yum module rather than running yum
谢谢!
推荐答案
您可以通过以下方式隐藏警告:
You can hide warning with:
- name: "Check if MariaDB needs to be upgraded"
shell: "yum check-update MariaDB-server|grep MariaDB|wc -l"
args:
warn: false
register: needs_update
或者你可以欺骗 Ansible 在 check_mode
中执行 yum
任务:
Or you can trick Ansible to execute yum
task in check_mode
:
- name: "Check if MariaDB needs to be upgraded (CHECK MODE!)"
yum:
name: MariaDB-server
state: latest
check_mode: yes
register: needs_update_check
- name: "Stop mysql service"
service:
name: mysql
state: stopped
when: needs_update_check | changed
请在使用前测试此代码.
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