Is there a way to output only the last 5 lines of an Ansible shell output, for example?
Maybe using loops?
Example:
- name: Running Migrations
ansible.builtin.shell: /some-script-produces-lot-of-output.sh
register: ps
- debug: var=ps.stdout_lines
Debug should only output the last 5 lines.
You can use Python's slicing notation for this:
- debug:
var: ps.stdout_lines[-5:]
Will output the 5 lines from the end of the list (hence the negative value) up until the end of the list.
Given the tasks
- command: printf "line1\nline2\nline3\nline4\nline5\nline6\nline7\nline8\nline9\nline10"
register: ps
- debug:
var: ps.stdout_lines[-5:]
This yields:
TASK [command] ************************************************************
changed: [localhost]
TASK [debug] **************************************************************
ok: [localhost] =>
ps.stdout_lines[-5:]:
- line6
- line7
- line8
- line9
- line10