[openstack-dev] [kolla] Building Kolla containers with 3rd party vendor drivers

Sandhya Dasu (sadasu) sadasu at cisco.com
Fri May 11 17:02:44 UTC 2018

Hi Paul,
    I am happy to use the changes you proposed to

I was under the impression that this was disallowed for drivers that weren’t
considered “reference drivers”. If that is no longer the case, I am happy to go
this route and abandon the approach I took in my diffs in:

I agree with the reasoning that Kolla cannot possibly maintain a large
number of neutron-server containers, one per plugin.

To support operators that want to build their own images, I was hoping that
we could come up with a mechanism by which the 3rd party driver owners
provide the code (template-override.j2 or Dockerfile.j2 as the case maybe)
to build their containers. This code can definitely live out-of-tree with the
drivers themselves.

Optionally, we could have them reside in-tree in Kolla in a separate directory, 
say “additional drivers”. Kolla will not be responsible for building a container
per driver or for building a huge (neutron-server) container containing all
interested drivers.

Operators that need one or more of these “additional drivers” will be provided
with documentation on how the code in the “additional drivers” path can be
used to build their own containers. This documentation will also detail how
to combine more than one 3rd party drivers into their own container.

I would like the community’s input on what approach best aligns with Kolla’s
and the larger OpenStack community’s goals.


On 5/11/18, 5:35 AM, "Paul Bourke" <paul.bourke at oracle.com> wrote:

    Hi Sandhya,
    Thanks for starting this thread. I've moved it to the mailing list so 
    the discussion can be available to anyone else who is interested, I hope 
    you don't mind.
    If your requirement is to have third party plugins (such as Cisco) that 
    are not available on tarballs.openstack.org, available in Kolla, then 
    this is already possible.
    Using the Cisco case as an example, you would simply need to submit the 
    following patch to 
         'neutron-server-plugin-networking-cisco': {
             'type': 'git',
             'location': ('https://github.com/openstack/networking-cisco')},
    This will then include that plugin as part of the future neutron-server 
    If the requirement is to have Kolla publish a neutron-server container 
    with *only* the Cisco plugin, then this is where it gets a little more 
    tricky. Sure, we can go the route that's proposed in your patch, but we 
    end up then maintaining a massive number of neutron-server containers, 
    one per plugin. It also does not address then the issue of what people 
    want to do when they want a combination or mix of plugins together.
    So right now I feel Kolla takes a middle ground, where we publish a 
    neutron-server container with a variety of common plugins. If operators 
    have specific requirements, they should create their own config file and 
    build their own images, which we expect any serious production setup to 
    be doing anyway.
    On 10/05/18 18:12, Sandhya Dasu (sadasu) wrote:
    > Yes, I think there is some misunderstanding on what I am trying to accomplish here.
    > I am utilizing existing Kolla constructs to prove that they work for 3rd party out of tree vendor drivers too.
    > At this point, anything that a 3rd party vendor driver does (the way they build their containers, where they publish it and how they generate config) is completely out of scope of Kolla.
    > I want to use the spec as a place to articulate and discuss best practices and figure out what part of supporting 3rd party vendor drivers can stay within the Kolla tree and what should be out.
    > I have witnessed many discussions on this topic but they only take away I get is “there are ways to do it but it can’t be part of Kolla”.
    > Using the existing kolla constructs of template-override, plugin-archive and config-dir, let us say the 3rd party vendor builds a container.
    > OpenStack TC does not want these containers to be part of tarballs.openstack.org. Kolla publishes its containers to DockerHub under the Kolla project.
    > If these 3rd party vendor drivers publish to Dockerhub they will have to publish under a different project. So, an OpenStack installation that needs these drivers will have to pull images from 2 or more Dokerhub projects?!
    > Or do you prefer if the OpenStack operator build their own images using the out-of-tree Dockerfile for that vendor?
    > Again, should the config changes to support these drivers be part of the kolla-ansible repo or should they be out-of-tree?
    > It is hard to have this type of discussion on IRC so I started this email thread.
    > Thanks,
    > Sandhya
    > On 5/10/18, 5:59 AM, "Paul Bourke (pbourke) (Code Review)" <review at openstack.org> wrote:
    >      Paul Bourke (pbourke) has posted comments on this change. ( https://review.openstack.org/567278 )
    >      Change subject: Building Kolla containers with 3rd party vendor drivers
    >      ......................................................................
    >      Patch Set 2: Code-Review-1
    >      Hi Sandhya, after reading the spec most of my thoughts echo Eduardo's. I'm wondering if there's some misunderstanding on how the current plugin functionality works? Feels free to ping me on irc I'd be happy to discuss further - maybe there's still some element of what's there that's not working for your use case.
    >      --
    >      To view, visit https://review.openstack.org/567278
    >      To unsubscribe, visit https://review.openstack.org/settings
    >      Gerrit-MessageType: comment
    >      Gerrit-Change-Id: I681d6a7b38b6cafe7ebe88a1a1f2d53943e1aab2
    >      Gerrit-PatchSet: 2
    >      Gerrit-Project: openstack/kolla
    >      Gerrit-Branch: master
    >      Gerrit-Owner: Sandhya Dasu <sadasu at cisco.com>
    >      Gerrit-Reviewer: Duong Ha-Quang <duonghq at vn.fujitsu.com>
    >      Gerrit-Reviewer: Eduardo Gonzalez <dabarren at gmail.com>
    >      Gerrit-Reviewer: Paul Bourke (pbourke) <paul.bourke at oracle.com>
    >      Gerrit-Reviewer: Zuul
    >      Gerrit-HasComments: No

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