Re: [ansible-project] tell 'service' module to continue with playbook, if service isn't found

[Stefan Hornburg (Racke)]

On 15/10/2021 12:40, dulhaver via Ansible Project wrote:

On 10/15/2021 12:07 PM Stefan Hornburg (Racke) <ra...@linuxia.de> wrote:

On 15/10/2021 12:04, dulhaver via Ansible Project wrote:

On 10/15/2021 11:41 AM Stefan Hornburg (Racke) <ra...@linuxia.de> wrote:

On 15/10/2021 11:20, dulhaver via Ansible Project wrote:

I am trying to install postgresql via a playbook and want to make sure the service 
is not running prior installation on the target (rhel7/8 & debian10) machines.

However my task below

       - name: stop postgresql.service from systemd if running
         service:
           name: postgresql.service
           state: stopped
           # enabled: false
         become: yes

is failing ('Could not find the requested service postgresql.service: host')

so, I guess I have to build something that directs the target to ignore that 
and continues with the playbook. I just can't see anything

You can check the status of the postgresql service as follows:

    - service_facts:

    - debug:
        msg: "{{ ansible_facts.services.postgresql | default({ 'state' : 'absent'}) 
}}"

TASK [service_facts] 
***************************************************************************************************************************************
ok: [papas]

TASK [debug] 
***********************************************************************************************************************************************
ok: [papas] => {
       "msg": {
           "name": "postgresql",
           "source": "sysv",
           "state": "running"
       }
}

are those arguments to the the "service" module? how exaclty would I weave 
those into my task? I tried

    - name: stop postgresql.service from systemd if running
      service:
        name: postgresql
          service_facts:
          debug:
            msg: "{{ ansible_facts.services.postgresql | default({ 'state' : 
'absent'}) }}"
        state: stopped
        # enabled: false
      become: yes

but that did not work

No, use my tasks verbatim.

hm ... pasting this verbatim to my plabook does not survice a --symtax-check

What is the diagnosis of the syntax check?

I figured out soome sort of sense-making output with adding 2 tasks based on 
what you posted.

############################################################
   - name: gather service facts
     service_facts:

   - name: return postgres running or not
     debug:
       msg: "{{ ansible_facts.services.postgresql | default({ 'state' : 'absent'}) 
}}"
############################################################

however ... what do I do whith that output ('state: absent' in my test 
scenario)?

Maybe I need to put this to work as some sort of condition deciding whether to 
run a 'service' task disabling the postgresql.service or not?

Correct. For example:

when: ansible_facts.services.postgresql.state == 'running'

Regards
        Racke



--
Ecommerce and Linux consulting + Perl and web application programming.
Debian and Sympa administration.

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