如何使用Ansible杀死正在运行的进程?

问题描述

我有一个有趣的剧本，可以杀死正在运行的进程，并且在大多数情况下都能正常工作！但是，有时我们会发现无法杀死进程，因此，"wait_for"超时，并抛出错误并且它停止了该过程.

I have an ansible playbook to kill running processes and works great most of the time!, however, from time to time we find processes that just can't be killed so, "wait_for" gets to the timeout, throws an error and it stops the process.

当前的解决方法是手动进入包装盒，使用"kill -9"并再次运行ansible剧本，所以我想知道是否有任何方法可以解决来自ansible本身的情况?不想从一开始就使用kill -9，但我也许可以解决超时问题?即使在300秒内没有杀死进程的情况下，也可以使用kill -9?但是最好的方法是什么?

The current workaround is to manually go into the box, use "kill -9" and run the ansible playbook again so I was wondering if there is any way to handle this scenario from ansible itself?, I mean, I don't want to use kill -9 from the beginning but I maybe a way to handle the timeout?, even to use kill -9 only if process hasn't been killed in 300 seconds? but what would be the best way to do it?

这些是我目前拥有的任务:

These are the tasks I currently have:

- name: Get running processes
  shell: "ps -ef | grep -v grep | grep -w {{ PROCESS }} | awk '{print $2}'"
  register: running_processes

- name: Kill running processes
  shell: "kill {{ item }}"
  with_items: "{{ running_processes.stdout_lines }}"

- name: Waiting until all running processes are killed
  wait_for:
    path: "/proc/{{ item }}/status"
    state: absent
  with_items: "{{ running_processes.stdout_lines }}"

谢谢！

推荐答案

您可以忽略wait_for上的错误，并注册结果以强制杀死失败的项目:

You could ignore errors on wait_for and register the result to force kill failed items:

- name: Get running processes
  shell: "ps -ef | grep -v grep | grep -w {{ PROCESS }} | awk '{print $2}'"
  register: running_processes

- name: Kill running processes
  shell: "kill {{ item }}"
  with_items: "{{ running_processes.stdout_lines }}"

- wait_for:
    path: "/proc/{{ item }}/status"
    state: absent
  with_items: "{{ running_processes.stdout_lines }}"
  ignore_errors: yes
  register: killed_processes

- name: Force kill stuck processes
  shell: "kill -9 {{ item }}"
  with_items: "{{ killed_processes.results | select('failed') | map(attribute='item') | list }}"

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