To handle this, I would create a custom fact (
http://docs.ansible.com/playbooks_variables.html#local-facts-facts-d) that
returned whether the current host is in the master state. Then you could
write two tasks as follows:
- name: shut down non-masters
# <- whatever method you're using to shut things down, ie. service, etc.
when: not ansible_local.master_status.is_master
- name: shut down the master last
# <- whatever method you're using to shut things down, ie. service, etc.
when: ansible_local.master_status.is_master
Assuming the local fact was named "master_status.fact" and it returned JSON
like {'is_master': true}.
On Fri, May 2, 2014 at 10:05 AM, nfwlpw <[email protected]> wrote:
> This might be a newbie question, but I can't figure out how to without
> writing a wrapper around ansible, or invoking ansible multiple times
>
> Let's say this is my inventory:
>
> [some_service]
> A
> B
> C
>
> Some_service runs in synchronization mode so one is the master, which need
> to be shut down last.
>
> The trouble is I do not know without actually running "some_command" which
> one is the master, so the shutdown order might be B->C->A or A->C->B, etc.
>
> Is it possible to have ansible runs normally over these hosts, read the
> exit status of "some_command" and then delay executing shutdown on master
> until the others are done?
>
>
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