Ansible:在任务失败时执行清理 [英] Ansible: Perform Cleanup on Task Failure

问题描述

我目前正在编写一个遵循这种通用格式并通过 cron 作业运行的 Ansible play:

I'm currently writing an Ansible play that follows this general format and is run via a cron job:

pre_tasks:
  -Configuration / package installation

tasks:
  -Work with installed packages

post_tasks:
  -Cleanup / uninstall packages

上面的问题是有时 tasks 部分中的命令失败，当它执行时 post_tasks 部分不运行，使系统处于凌乱的状态.即使发生失败或致命错误，是否可以强制post_tasks中的命令运行?

The problem with the above is that sometimes a command in the tasks section fails, and when it does the post_tasks section doesn't run, leaving the system in a messy state. Is it possible to force the commands in post_tasks to run even if a failure or fatal error occurs?

我目前的方法是将 ignore_errors: yes 应用于 tasks 部分下的所有内容，然后将 when: 条件应用于每个任务单独检查先前的命令是否成功.

My current approach is to apply ignore_errors: yes to everything under the tasks section, and then apply a when: conditional to each task to individually check if the prior command succeeded.

这个解决方案看起来像一个黑客，但它变得更糟，因为即使设置了 ignore_errors: yes，如果任务遇到致命错误，整个游戏仍然会立即失败，所以我必须还运行 cron'd bash 脚本以在到达播放执行后手动检查事物.

This solution seems like a hack, but it gets worse because even with ignore_errors: yes set, if a Fatal error is encountered for a task the entire play will still immediately fail, so I have to also run a cron'd bash script to manually check on things after reach play execution.

我想要的只是保证即使 tasks 失败，post_tasks 仍会运行.我确信有一种方法可以在不求助于 bash 脚本包装器的情况下做到这一点.

All I want is a guarantee that even if tasks fails, post_tasks will still run. I'm sure there is a way to do this without resorting to bash script wrappers.

推荐答案

不要使用 post_tasks 块，而是将清理过程作为常规 tasks 的一部分.

Don't use post_tasks block but rather have your cleanup process as part of regular tasks.

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