How to kill a running process using ansible?

Question

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.

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?

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 }}" 

Thanks!

Answer 1

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 }}"