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

[Stefan Hornburg (Racke)]

On 15/10/2021 13:37, dulhaver via Ansible Project wrote:

On 10/15/2021 1:01 PM Stefan Hornburg (Racke) <ra...@linuxia.de> wrote:

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?

######################################################################
play -v --limit [host] postgres_install.yml --syntax-check
Using /path/to/ansible.cfg as config file
ERROR! We were unable to read either as JSON nor YAML, these are the errors we 
got from each:
JSON: Expecting value: line 1 column 1 (char 0)

Syntax Error while loading YAML.
   did not find expected key

The error appears to be in 
'/home/gwagner/repos/ansible/step/step_server_env/postgres_install_test_external.yml':
 line 130, column 4, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:
    - service_facts:
    ^ here
######################################################################

Could be an indentation problem.

Regards
       Racke

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'

ok, thx. I'll play with that

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

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