Ansible: past when simulator

Question

Ansible provides a module failed_whenthat allows users to specify specific failure conditions for their tasks, for example. a specific string is found in stdout or stderr.

I am trying to do the opposite: I would like my tasks to not crash if any of the rowset is found in stdout or stderr. In other words, I would like to bring something closer to the functionality of the module passed_when.

• I still want it to go fine when the return code is 0.
• But if it fails (rc! = 0), then it must first check for a row.
• those. if some string is found, it passes no matter what.

My reasoning is as follows:

There are many reasons why the task is a failure - but some of them, depending on the result, I do not consider as a failure in the current context.

Does anyone have a good idea how this can be achieved?

Answer 1

Look at here:

Is there any Ansible equivalent of "failed_when" for success

- name: ping pong redis
  command: redis-cli ping
  register: command_result
  failed_when: 
    - "'PONG' not in command_result.stderr"
    - "command_result.rc != 0"

• will not work if the return code is 0 and there is no "PONG" in stderr.
• will not work if stderr has "PONG".

So, it passes if any of the list is False

Answer 2

Your original question was formulated as follows (using logical logic to simplify it):

Executes a command if a rowset is found in stdout or stderr

Rephrase your logic:

, stdout stderr. , failed_when. :

---
- name: Test failed_when as succeed_if
  hosts: localhost
  connection: local
  gather_facts: no

  tasks:
    - name: "'succeed_if' set of strings in stdout"
      command: /bin/echo succeed1
      register: command_result
      failed_when: "command_result.stdout not in ['succeed1',]"

    - name: "'succeed_if' set of strings in stdout (multiple values)"
      command: /bin/echo succeed2
      register: command_result
      failed_when: "command_result.stdout not in ['succeed1', 'succeed2']"

    - name: "'succeed_if' set of strings in stderr (multiple values)"
      shell: ">&2 /bin/echo succeed2 "
      register: command_result
      failed_when: "command_result.stderr not in ['succeed1', 'succeed2']"

    - name: "'succeed_if' set of strings in stderr (multiple values) or rc != 0"
      shell: ">&2 /bin/echo succeed2; /bin/false"
      register: command_result
      failed_when: "command_result.stderr not in ['succeed1', 'succeed2'] and command_result.rc != 0"

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