Rollback in Ansible ?

[Ryad karkar]

Hey all,

I want know when i play one task who failed if possible that ansible do rollback ?

Exemple :

- name: "create file"

  shell: touch test_file.txt

When i play this task, she failed so i want one task or method for rollback please ?

I see in documentation officielle the module aci_config_rollback but i don't konw how works this module...

https://docs.ansible.com/ansible/latest/modules/aci_config_rollback_module.html

Can you help me ?

Thanks community ansible !! :)

Regards,

[Stefan Hornburg (Racke)]

On 5/14/19 11:54 AM, Ryad karkar wrote:
> Hey all,
>
> I want know when i play one task who failed if possible that ansible do rollback ?
>
> Exemple :
>
> - name: "create file"
>   shell: touch test_file.txt
>
> When i play this task, she failed so i want one task or method for rollback please ?

Hello Ryad,

what do you have in mind for the rollback for this task. Usually, if "touch" fails nothing changes on the target
system.

>
> I see in documentation officielle the module *aci_config_rollback* but i don't konw how works this module...
>
> https://docs.ansible.com/ansible/latest/modules/aci_config_rollback_module.html

That looks like it applies for a very specific use case.

Regards
Racke

>
> Can you help me ?
>
> Thanks community ansible !! :)
>
> Regards,
>

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

[Ryad karkar]

Hey stefan,

Yes but if i want one procedure for install one application, exemple:

- block:

     - name: task 1

        ......

        .....

 

    - name: task 2

      ......

      ......

 

i want that if one task fails, I want him to go back on all the tasks that play it.

Do you understand what i say or no ?

Can you help me please :)

Regards

Le mardi 14 mai 2019 12:20:04 UTC+2, Stefan Hornburg (Racke) a écrit :

On 5/14/19 11:54 AM, Ryad karkar wrote:
> Hey all,
>
> I want know when i play one task who failed if possible that ansible do rollback ?
>
> Exemple :
>
> - name: "create file"
>   shell: touch test_file.txt
>
> When i play this task, she failed so i want one task or method for rollback please ?

Hello Ryad,

what do you have in mind for the rollback for this task. Usually, if "touch" fails nothing changes on the target
system.

>
> I see in documentation officielle the module *aci_config_rollback* but i don't konw how works this module...
>
> https://docs.ansible.com/ansible/latest/modules/aci_config_rollback_module.html

That looks like it applies for a very specific use case.

Regards
        Racke

>
> Can you help me ?
>
> Thanks community ansible !! :)
>
> Regards,
>
> --
> You received this message because you are subscribed to the Google Groups "Ansible Project" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to

> ansible...@googlegroups.com <mailto:ansible-project+unsub...@googlegroups.com>.

[James Cassell]

On Tue, May 14, 2019, at 8:04 AM, Ryad karkar wrote:
> Hey stefan,
>
> Yes but if i want one procedure for install one application, exemple:
>
> - block:
>
> - name: task 1
> ......
> .....
>
> - name: task 2
> ......
> ......
>
> i want that if one task fails, I want him to go back on all the tasks that
> play it.
>

You can write rollback tasks in a `rescue` section, followed by a fail task, but there is no automatic rollback functionality unless you write it yourself.

V/r,
James Cassell

[Ryad karkar]

Hey,

Ok, thank you very much for your help !!

I will try rescue

Regards,

[Eric Hymowitz]

The problem you have is that ansible does not retain the old state of the machine when it makes changes.  The fact that you executed the command "touch test_file.txt" does not indicate whether test_file.txt did or did not exist prior to running the command.  So to "roll back", do you erase the file?  Change the date-stamp back to what it was?

Probably the closest thing you will find is a "block" with a "rescue" section attached, to specify what you want to happen in the event of an error.

https://docs.ansible.com/ansible/latest/user_guide/playbooks_blocks.html

--EbH

[Ryad karkar]

Hey,

It is really very interesting this section rescue but if in my block I execute for example a script sql which does a lot of actions and that there is an error ...

So what to put in the rescue section?

Thanks for your help ! :)

Regards,

[James Cassell]

On Tue, May 14, 2019, at 12:08 PM, Ryad karkar wrote:
> Hey,
>
> It is really very interesting this section rescue but if in my block I
> execute for example a script sql which does a lot of actions and that there
> is an error ...
>

This is beyond the scope of ansible. You should have the rescue block do what is necessary to recover from your SQL script, or use something like a SQL transaction, but, again, it's beyond the scope of ansible.

V/r,
James Cassell

[Ryad karkar]

Ok, i will play with rescue fonctionnality for do one rollback if there is one error in my block.

Thank you very much for your answer goy !! ;)

Regards,