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

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问题描述

我有一个应该在指定 IP 上配置的剧本,然后连接到这个应用程序来配置里面的东西.

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:我需要在更改应用程序配置中的任何内容后重新启动应用程序,如果我不重新启动应用程序,则连接失败(没有连接,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).

我目前的剧本:

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 configure_app 在执行更改应用程序中的数据"之前发生更改,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运行而不是在播放结束时运行,则需要将其放在两个任务之间:

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:

- 元:flush_handlers

示例取自 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,这将导致所有挂起的处理程序在该点运行,而不仅仅是那个特定的处理程序.

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

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