Ansible:对任务失败执行清理 [英] Ansible: Perform Cleanup on Task Failure

问题描述

我目前正在按照这种通用格式编写Ansible剧本，并通过cron作业运行:

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

上述问题是有时 tasks 部分中的命令失败，而 post_tasks 部分不运行时，系统处于凌乱的状态.即使发生或致命错误，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?

我当前的方法是将 ignore_errors:是应用于 tasks 部分下的所有内容，然后将 when:有条件地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.

此解决方案似乎像黑客一样，但由于即使设置了 ignore_errors:是，它也会变得更糟，如果在执行任务时遇到致命错误，则整个游戏仍然会立即失败，因此我必须还可以执行cron'd bash脚本，以在执行播放后手动检查事物.

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.

我要保证的是，即使 tasks 失败， post_tasks 仍然可以运行.我确定有一种方法可以不使用bash脚本包装器.

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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