Is there some Ansible equivalent to "failed_when" for success

Question

Looking at the documentation about error handling Ansible error handling

I only see a way to fail the provisioning fail_when, i am wondering if there is any way to do the oposite.

something that looks like this:

- name: ping pong redis
  command: redis-cli ping
  register: command_result
  success_when: "'PONG' in command_result.stderr"

Thanks.

Answer 1

I think maybe assert module is what you want.

Examples:

- name: A single condition can be supplied as string instead of list
  ansible.builtin.assert:
    that: "ansible_os_family != 'RedHat'"

- name: Use yaml multiline strings to ease escaping
  ansible.builtin.assert:
    that:
      - "'foo' in some_command_result.stdout"
      - number_of_the_counting == 3
      - >
        "reject" not in some_command_result.stderr

- name: After version 2.7 both 'msg' and 'fail_msg' can customize failing assertion message
  ansible.builtin.assert:
    that:
      - my_param <= 100
      - my_param >= 0
    fail_msg: "'my_param' must be between 0 and 100"
    success_msg: "'my_param' is between 0 and 100"

- name: Please use 'msg' when ansible version is smaller than 2.7
  ansible.builtin.assert:
    that:
      - my_param <= 100
      - my_param >= 0
    msg: "'my_param' must be between 0 and 100"

- name: Use quiet to avoid verbose output
  ansible.builtin.assert:
    that:
      - my_param <= 100
      - my_param >= 0
    quiet: true