Changing actions in case a node fails

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1

Hi there,

I’ve been looking arround trying to find a way, with no luck.

When running a playbook against multiple nodes (say 5), and one of them fail a task (or block), I would like the other 4 nodes to run different tasks than the ones they would run if non of the nodes fail.

Is there any way to signal those nodes or to send them a variable which I could use to choose the actions to be taken?

The case of use is that if something fails in any host, I would like to “undo” what I have already done…

Thanks!

2

In 2.0.1, we’re going to allow the use of any_errors_fatal at the block level, so you can simply do this:

  • block:

  • task1: …

  • task2: …
    …

  • taskN: …

rescue:

  • undo_taskN: …
    …

  • undo_task2: …

  • undo_task1: …

any_errors_fatal: yes

However, there is currently a bug in 2.0.0.x where any_errors_fatal is not working as stated in the documentation, so you’ll have to wait until we get 2.0.1 out to do this.

3

Hi James,

This is a really nice feature! I was just trying to get there by using “delegate_facts” which is not that clean of a solution,… :wink:

Will this feature be in the “devel” branch soon?

And till now (with this new feature) was there any other way to achieve this?

Thank you very much!

4

This should be active in devel already, yes, and will be included in 2.0.1 as well.

5

Hi James,

Yes it seems something is different regarding this on devel branch. But either I don’t understand what it does or something is not right.

In the current version (2.0.0.0) if I try to use “any_errors_fatal” in a block level it fails because this is not an option to be usable on a block.
With the devel branch this changes. Now I can use this option but it doesn’t do what I was expecting.
Now if one of the hosts fails, it make the rest fail and stop executing the playbook. But I am not able to have it execute the “rescue” part.

`

  • name: deploy
    hosts: all
    gather_facts: True
    tasks:
  • block:
  • file: path=/tmp/testfolder1 state=directory
    rescue:
  • file: path=/tmp/testfolder2 state=directory
    any_errors_fatal: yes
    `

In this example, if I make it fail creating “/tmp/testfolder1”, it will not be creating “/tmp/testfolder2”.

Is this the way it is supposed to work? or should I open an issue on github?

Thanks!

6

Yes, please do.

7

Hi there,

For anyone interest and to close this thread.
I reported the bug and it is already solved!

https://github.com/ansible/ansible/issues/14024

Now In case of any host fail it will execute rescue to all of them! (devel branch only).

What a great feature!!!

Thanks James!