onos_ml2 mechanism driver not found when we are trying to deploy onos with kolla ansible

[Brijesh]

When i am trying to deploy onos with kolla ansible, neutron_server container stuck in restating state.
Error in neutron_server.log:
CRITICAL neutron.plugins.ml2.managers [-] The following mechanism drivers were not found: set(['onos_ml2'])

Expected result: All openstack service should be working fine.

Steps to reproduce: Deploy openstack stein using kolla ansible
set enable_onos: "yes" in /etc/kolla/global.yml
Deployment is completed successfully but neutron_server container on controller is in restarting state.

Environment:
NAME="Ubuntu"
VERSION="16.04.6 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.6 LTS"
VERSION_ID="16.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
VERSION_CODENAME=xenial
UBUNTU_CODENAME=xenial

Linux controller 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Client: Docker Engine - Community
 Version: 19.03.4
 API version: 1.40
 Go version: go1.12.10
 Git commit: 9013bf583a
 Built: Fri Oct 18 15:53:51 2019
 OS/Arch: linux/amd64
 Experimental: false

Server: Docker Engine - Community
 Engine:
  Version: 19.03.4
  API version: 1.40 (minimum version 1.12)
  Go version: go1.12.10
  Git commit: 9013bf583a
  Built: Fri Oct 18 15:52:23 2019
  OS/Arch: linux/amd64
  Experimental: false
 containerd:
  Version: 1.2.10
  GitCommit: b34a5c8af56e510852c35414db4c1f4fa6172339
 runc:
  Version: 1.0.0-rc8+dev
  GitCommit: 3e425f80a8c931f88e6d94a8c831b9d5aa481657
 docker-init:
  Version: 0.18.0
  GitCommit: fec3683

pip show kolla-ansible:
Name: kolla-ansible
Version: 8.0.1
Summary: Ansible Deployment of Kolla containers
Home-page: https://docs.openstack.org/kolla-ansible/latest/
Author: OpenStack
Author-email: <email address hidden>
License: Apache License, Version 2.0
Location: /usr/local/lib/python2.7/dist-packages
Requires: oslo.utils, jmespath, oslo.config, PyYAML, setuptools, pbr, six, Jinja2, netaddr, cryptography, docker
Required-by:

[Mark Goddard (mgoddard)]

Hi Brijesh. We don't currently include the ONOS plugin in our neutron-server image. In fact, it looks like the networking-onos plugin hasn't been released since 2015: https://pypi.org/project/networking-onos/#history. I would consider an alternative.

[Brijesh (brijesh.mishra)]

Hi Mark

Where it should be installed, inside neutron-server container?
But my neutron-server container is in restarting state so i am not able to login into that.

[Mark Goddard (mgoddard)]

I would expect it needs to be installed in neutron-server, yes. Rebuild the image with that package installed. Or if you remove the driver from config it should start ok.

But seriously, the project is dead as far as I can tell.

[Brijesh (brijesh.mishra)]

So you mean to say that onos will not be supported in kolla ansible, right?

[Mark Goddard (mgoddard)]

We won't support software that itself is not supported.

[Brijesh (brijesh.mishra)]

So which SDN is compatible with kolla anisble (For stein release)?

[Mark Goddard (mgoddard)]

Well it's not just kolla ansible - the networking-onos plugin is no longer maintained.

We have OpenDaylight support, although I have not used it and I understand the version of ODL is quite old now. We are considering adding support for OVN in the next release (Ussuri).

I just checked, and ONOS support was added to kolla-ansible in the Stein release: https://review.opendev.org/#/c/551826/. I would suggest getting in touch with someone from 99cloud (e.g. Jeffrey4l or caoyuan) to ask about how they are using it.

[Brijesh (brijesh.mishra)]

I have already gone through this review and done all the required changes but still i am getting above error.

[Mark Goddard (mgoddard)]

That's because we don't install networking-onos in the neutron-server container image. You would need to do that yourself. https://docs.openstack.org/kolla/latest/admin/image-building.html

[Brijesh (brijesh.mishra)]

Thanks Mark for the info.

[Radosław Piliszek (yoctozepto)]

Mark, being precise, support was added in Rocky and it broke in Stein. :-)

[Radosław Piliszek (yoctozepto)]

Brijesh, OpenStack in general seems to support OpenDaylight, kolla-ansible deploys some old version (which we are deprecating already) but it should be easy to integrate with externally deployed OpenDaylight using config overrides. If you are looking for a fully-fledged SDN solution that works with OpenStack, then ODL is your best bet. Sharing words of wisdom, make sure you really need the SDN platform - it always adds complexity and we have all seen ppl who would be fine with bare Neutron.