How to exclude openvz guests?

[Ilya Ivanov]

I want to exclude all openvz guests the task being run. I've tried "when: not (ansible_virtualization_type == 'openvz' and ansible_virtualization_role == 'guest')" and some variations, but it doesn't work ("error while evaluating conditional"), seemingly because the variables are not defined. So how can I actually do it?

[Brian Coca]

you can put them into a group, either statically or dynamically with group_by (in a pre play).

then in the play that runs those tasks you can hosts: "all:!openvz", or if only for a task

when: inventory_hostname not in groups['openvz']

[Brian Coca]

otherwise, add 'is defined' to the vars you are checking.

[Ilya Ivanov]

I don't know the values ahead, so I can't use a static group. Adding "is defined" won't change the fact that it fails due to variable being undefined. I understand that it's the case for dynamic grouping based on a variable, as well.

[Michael DeHaan]

"Adding "is defined" won't change the fact that it fails due to variable being undefined."

Don't believe that's true.   Conditionals will still short circuit fine.

Also {{ x | default('none') }} == 'open_vz_whatever'

may also be an option

On Wed, Mar 19, 2014 at 12:28 AM, Ilya Ivanov <bear...@gmail.com> wrote:

I don't know the values ahead, so I can't use a static group. Adding "is defined" won't change the fact that it fails due to variable being undefined. I understand that it's the case for dynamic grouping based on a variable, as well.

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[Ilya Ivanov]

Yes, I think I confused it with another software that had a similar issue. Thanks.

This is what seems to work for me:
not_openvz_guest: ansible_virtualization_type is not defined or (ansible_virtualization_type is defined and not (ansible_virtualization_type == 'openvz' and ansible_virtualization_role == 'guest'))

[Brian Coca]

shorter version

not_openvz_guest: ansible_virtualization_type is not defined or not (ansible_virtualization_type == 'openvz' and ansible_virtualization_role == 'guest')

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Brian Coca
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