如何在Ansible中执行任务之前强制处理程序运行? [英] How to force handler to run before executing a task in Ansible?

问题描述

我有一个剧本，应该在指定的IP上进行配置，然后连接到此应用以在内部配置内容.

I have a playbook which should configure on specified IP, and than connect to this app to configure stuff inside.

我遇到了一个问题:更改了应用程序配置中的任何内容后，我需要重新启动应用程序，如果不重新启动应用程序，则无法连接到该应用程序(无连接，因为应用程序对使用新IP的新配置一无所知我正在尝试访问的地址).

I've got a problem: I need to restart app after I've changed anything in app config, and if I do not restart app, connection to it failed (no connection because app knows nothing about new config with new IP address I'm trying to access).

我当前的剧本:

tasks:
- name: Configure app
  template: src=app.conf.j2 dest=/etc/app.conf
  notify: restart app

- name: Change data in app
  configure_app: host={{new_ip}} data={{data}}

handlers:
- name: restart app
  service: name=app state=restarted

如果在执行更改应用程序中的数据"之前更改了configure_app，我需要强制处理程序运行.

I need to force the handler to run if configure_app changed before executing 'Change data in app'.

推荐答案

如果要强制处理程序在两个任务之间而不是在播放结束时运行，则需要将此处理程序放在两个任务之间:

If you want to force the handler to run in between the two tasks instead of at the end of the play, you need to put this between the two tasks:

- meta: flush_handlers

示例摘自ansible 文档 :

Example taken from the ansible documentation :

tasks:
   - shell: some tasks go here
   - meta: flush_handlers
   - shell: some other tasks

请注意，这将导致所有待处理的处理程序在该时刻运行，而不仅仅是特定的处理程序.

Note that this will cause all pending handlers to run at that point, not just that specific one.

这篇关于如何在Ansible中执行任务之前强制处理程序运行?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！