[rdo-list] [quickstart] Status of undercloud baremetal role and future evolutions

[Wesley Hayutin]

On Fri, Nov 4, 2016 at 1:36 PM, Raoul Scarazzini <rasca at redhat.com> wrote:

> Hi guys,
> just would like to share the status around the role in the subject so to
> keep the one interested up to date. What we want to achieve with this
> role is to have a ready to use baremetal undercloud, like the virtual
> one produced by tripleo-quickstart.
> At the moment there is just one job in the RDO pipeline that uses this
> role [1], plan is to have more than this, because you already know that
> "with baremetal is never easy".
>

This role sets up the undercloud on a provided server directly w/o setting
up a virtual guest for the undercloud.
I would think the performance team would be interested in this role so that
the undercloud performance metrics are not skewed by libvirt.

I was also thinking it may be useful in the multinode nodepool workflow,
where the undercloud is directly installed.  I don't see there being an
advantage in using it, but I could be missing something.

I could also see ops teams taking advantage of this to deploy out to
production environments.  We would need to ensure the role is uncoupled
from any provisioning, but I see it being valuable for sure.

I've copied some other folks to get their thoughts.
Thanks Raoul!

>
> I've worked to make the role integrate with the oooq evolution, trying
> to reuse as much as possible the existing extra roles. So, with the
> latest modifications the role does these basic task:
>
> 1) machine-provision: provide the machine with specific a script that
> needs to be passed;
> 2) machine-setup: create the user, add the machine to ansible inventory
> and basically makes virthost == undercloud;
> 3) undercloud-repos-conf: configure the repos based upon the release
> parameter passed to quickstar.sh command line;
> 4) overcloud-images: download the images again based upon the release
> parameter;
>
> So a playbook that deploys a complete undercloud baremetal env should
> include these roles:
>
> - tripleo-baremetal-undercloud
> - undercloud-scripts (from tripleo-quickstart)
> - undercloud-install (from tripleo-quickstart)
>
> The additional role for the baremetal preparation must be used to finish
> the bm setup:
>
> - overcloud-prep-baremetal
>
> And then, from this point on, everything can proceed with the usual
> order, so:
>
> - overcloud-prep-config
> - overcloud-prep-images
> - overcloud-prep-flavors
> - overcloud-prep-network
> - tripleo-overcloud
> - tripleo-inventory
>
> In addition one can specify the validation steps, in my case I'm using
> this [2] because of HA.
>
> Interventions were needed on these roles:
>
> - ansible-role-tripleo-overcloud-prep-network: Do not copy
> network-environment.yaml on baremetal [3];
> - ansible-role-tripleo-overcloud-prep-baremetal: Add optional upstream
> ipxe installation [4];
> - ansible-role-tripleo-baremetal-undercloud: Integrate role with oooq
> extra roles [5];
>
> That's basically all, all this stuff was tested as working on a bm env,
> and basically I'm asking now for reviews and considerations.
>
> Thanks,
>
> [1]
> https://rhos-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/
> tripleo-quickstart-newton-baremetal-undercloud-haa01-
> lab-float_nic_with_vlans/
> [2]
> https://github.com/redhat-openstack/ansible-role-
> tripleo-overcloud-validate-ha
> [3] https://review.gerrithub.io/#/c/300865/
> [4] https://review.gerrithub.io/#/c/300866/
> [5] https://review.gerrithub.io/#/c/300869/
>
> --
> Raoul Scarazzini
> rasca at redhat.com
>
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