Open Stack

Hi,

We are working to get test coverage for XenServer, and wanted to share
the ideas, to see if we are on the right path. The goal would be to use
the official CI to run tests on XenServer.

1 - Installation

So the issue, is that there is no XenServer image available in the RS
cloud. In order to install an XS instance, we can take a standard image,
execute a script on it, and end up with a running XS. The only issue,
that during this install phase, several reboots are performed. To add
support for the install phase in nodepool, see this change:

    https://review.openstack.org/61463

2 - Prepare your system for imaging

After nodepool finished with the installation, it should be able to
access a standard distribution on the public IP, so it will happily
execute the setup script. However, before creating a snapshot from the
instance, we would need to tell the hypervisor, that it'll be
snapshotted - so during the next boot, it will be able to pick up new IP
addresses, etc (sort of Windows' sysprep)

    We haven't committed any patch for this yet

After these bits solved, several instances could be launched from the
snapshot, and we expect that with a proper localrc, they will be
well-behaving nodes.

3 - Wire up to the system

Our understanding, is that we'll need to:

Add the install, and prepare scripts to:
    config/modules/openstack_project/files/nodepool/scripts
Configure the images in:
    config/modules/openstack_project/templates/nodepool/nodepool.yaml.erb
Add localrc tweaks here:
    devstack-gate/devstack-vm-gate.sh
Add jobs here:
    config/modules/openstack_project/files/jenkins_job_builder/config/devstack-gate.yaml
And ask zuul to trigger them here:
    config/modules/openstack_project/files/zuul/layout.yaml

The wip changes to these are proposed by John:
    https://review.openstack.org/#/c/60900/
    https://review.openstack.org/#/c/60902/
    https://review.openstack.org/#/c/60903/

Any suggestions regarding to these changes?

Thanks,
Mate


-- 
Mate Lakat