[openstack-dev] [fuel] Ability to colocate roles

Bogdan Dobrelya bdobrelia at mirantis.com
Wed Jun 29 08:39:10 UTC 2016

On 06/28/2016 06:15 PM, Alex Schultz wrote:
> Hey fuel folks,
> So I know we have designation of conflicts[0] on roles to prevent two
> roles from being on the same node. Should we also support a colocation
> option?  My thought behind this is that if we were to expose more of the
> underlying functionality (such as a corosync role), we could then
> require that roles like database[1] or rabbitmq[2] be combined with the
> corosync role rather than relying on dirty hiera overrides.  In the

Good point. A role definition looking like this:
    name: "Controller"
    description: "..."
      - compute
      - ceph_osd
      - corosync
      - haproxy
      - database
      - messaging

Would look a way better than hacky code examples you provided.

> longer term this could be useful for splitting apart some of the
> controller functionality into smaller roles but still requiring that
> they be next to each other on nodes.
> Thoughts?
> Thanks,
> -Alex
> [0] https://docs.fuel-infra.org/fuel-dev/develop/nailgun/customization/roles.html
> [1] https://github.com/openstack/fuel-plugin-detach-database/blob/master/deployment_scripts/database_hiera_override.pp#L83-L92
> [2] https://github.com/openstack/fuel-plugin-detach-rabbitmq/blob/master/deployment_scripts/rabbitmq_hiera_override.pp#L47-L48
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Best regards,
Bogdan Dobrelya,
Irc #bogdando

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