Open Stack

Hi James,

Thanks for your answer!
As Mathieu said, we are currently working on the multi-node part of the
project and try to understand how the multi-node feature of nodepool could
be used by the other components of the infra.

Does something like the following lines make sense?

+ when a job with multi-node is required :
    - Jenkins selects a slave who has (for instance) the
"multi-devstack-precise" label
    - Jenkins clones devstack-gate inside the primary node
    - devstack-gate is executed "as usual" on the primary node (call of
devstack-vm-gate-wrap.sh --> setup_workspace --> setup_project -->
devstack-vm-gate.sh --> setup_localrc --> stack.sh)
    - at the end of the execution of stack.sh, a new part of code into
devstack-vm-gate.sh will allow to SSH into the "subnodes" thanks to the
/etc/nodepool files (this step may probably be done in parallel)
        * devstack-gate is cloned inside the subnodes
        * devstack-vm-gate-wrap.sh is executed inside the subnodes with
specifics environments variables in order to generate a good localrc for
the subnodes (some modifications of setup_localrc may have to probably be
done)

Thanks for your comments!
Jérôme

2014-04-03 11:14 GMT+02:00 Mathieu Rohon <mathieu.rohon at gmail.com>:

> Hi jim,
>
> >> Hi all,
> >>
> >> I see the very nice set of patches merged for multi-node in nodepool.
> >> Now that this part is done, will the next step be to modify
> devstack-gate
> >> to allow it to take advantage of the new multi-node feature of nodepool?
> >> There is already some work on that part?
> >
> > Yes, I think that will be the next step (at least, after this change:
> > https://review.openstack.org/#/c/84473/ merges and we do some simple
> > tests to validate that it works).
> >
> > I know that Sean Dague has run some multi-node devstack tests locally.
> > I haven't looked at the multinode devstack code in a while, but I expect
> > that we will need to have devstack-gate take the nodepool information
> > and use it to configure devstack for multi-node.  Are you interested in
> > working on that?
> >
> > -Jim
> >
>
> Thanks for your work on the multinode part of nodepool. Actually, we
> spent some time to dive into nodepool code and concept to propose this
> kind of evolution. Unfortunatly we didn't knew that you were working
> on this, If we had known, we would have worked on the devstack-gate
> evolution to take benefit of your effort. We probably should have open
> a BP to have a better visibility.
> However, it has helped us to better understand the CI process. As you
> know, having some multinode test in the gate is something that we
> would like to see as quick as possible. So we will try to spend some
> time on it, and to propose some evolutions of devstack-gate (or any
> other tool) to see jenkins running multinode tempest test. We don't
> have your expertise on CI tools, so may be we should fill a BP to have
> a place to discuss about specifications of this work?
>
> Mathieu
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-infra/attachments/20140403/4a3975c5/attachment.html>