On Tue, 12 Jul 2022 at 08:54, Mohtashim S <mohtash...@gmail.com> wrote:
> The output is for logging and auditing purposes only.
>
> The apps may be run by other teams on their intended hosts as mentioned in
> the inventory file or on other hosts where they should not be running.
>
This confirms my suspicion that this isn't a technical problem but rather
an organisational one.
Since I don't believe in fixing organisational problems with technological
measures, I won't be able to help you with that.
Somebody else might, though.
>
> The dumps would help identify where the app was actually running at the
> time of play and then the play may choose to start / stop the app at the
> intended host.
>
> This is a real-world problem and any solution would be appretiated.
>
> On Tuesday, July 12, 2022 at 9:34:49 AM UTC+5:30 dnmv...@gmail.com wrote:
>
>> Suppose your playbook does what you (think) you want. Then what do you
>> intend to do with this output?
>> What if some apps are running on hosts they're not intended to run on? Do
>> you take some corrective measures? Or reinstall the host?
>> And why is it possible at all that apps appear on random inventory hosts?
>>
>> Rather than using ansible as a glorified shell wrapper to report proces
>> status, I would use it to set up the infra so that only the right apps run
>> on the right hosts.
>>
>>
>> On Tue, 12 Jul 2022 at 00:16, Mohtashim S <mohta...@gmail.com> wrote:
>>
>>> I have 3 applications hosted on three separate hosts and mentioned in
>>> the hosts file like below:
>>>
>>> cat my.hosts
>>>
>>> [app1_webapp]
>>> host3.mybank.com
>>>
>>> [app2_webapp]
>>> host5.mybank.com
>>>
>>> [app3_webapp]
>>> host8.mybank.com
>>> My requirement is to run two types of raw module commands.
>>>
>>> The first raw task which should run on all three hosts for all three
>>> applications i.e uptime
>>>
>>> The second raw task is ps command that should run only on the respective
>>> host i.e ps -ef | grep app1 should only run on host3.mybank.com
>>>
>>> Below is how I call my main.yml
>>>
>>> ansible-playbook -i my.hosts main.yml -e appname=app1,app2,app3
>>>
>>> cat main.yml
>>>
>>> - hosts: "{{ product(appname.split(',')) |
>>> product(['webapp'])|map('flatten')|map('join', '_') }}"
>>>
>>> user: user1
>>> gather_facts: no
>>>
>>> tasks:
>>>
>>> - name: Check Running Process
>>> raw: "ps -ef | grep {{ item }}"
>>> register: psout
>>> with_items: "{{ appname.split(',') }}"
>>>
>>> - name: DUMP Running Process
>>> debug:
>>> msg: "{{ psout.stdout }}"
>>>
>>> The above raw fails as it tried ps for each app on each hosts which is
>>> what I wish to skip (correct).
>>>
>>> How do I put a when condition so that the ps command for the respective
>>> app should run on the respective host only and not on all three hosts?
>>>
>>> Summary: my problem is regarding standard practice in infrastructure
>>> management. Each app runs on its own host as specified in the my.hosts
>>> file. I wish to find if the app process ps -ef | grep <app-name> is running
>>> on its own host(desired) and not on all inventory-hosts
>>>
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