openvswitch-switch daemon starts before a datapath is installed

[Ian Wells]

Seen by John DeN on a compute node. Dependency absent: vswitch/manifests/ovs.pp

[Mark T. Voelker (mvoelker)]

Assigning to Robert as I believe he was working with John to debug earlier today. Feel free to reassign if not.

[John DeNisco (jdenisco)]

I've attached syslog from the control and the compute node. A workaround is to execute the following on the compute node:

apt-get install module-assistant
module-assistant auto-install openvswitch-datapath

[John DeNisco (jdenisco)]

syslog from the compute node

[John DeNisco (jdenisco)]

syslog from the control node

[Ian Wells (ijw-ubuntu)]

There are two separate issues here, it seems:

1. missing dependencies in openvswitch, now largely fixed by Ian in the vswitch module

2. A bug in the packaging of openvswitch:

https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/962189

And even this breaks down into several problems:
- you can set autoinstall for the module, and it at least tries to build it, but at least with the older 3.2.0-23 headers it claims not to compile
- if you install the kernel without the headers - as you might reasonably do, since the headers don't actually seem to auto-update versions - then it attempts to compile but fails with the same 'no headers' message.

Thus, to get this to work:
- install headers for all linux kernels resident on your system (in case of a reboot-upgrade) plus the one that's running (in case its image has been removed)
- install the openvswitch-datapath-dkms module
- check it builds, because a silent failure is a possibility
- never update the kernel, apparently, for this may leave you once more without a module

... and this would all work so much better if the openvswitch scripts actually flagged that something was wrong when they couldn't insert the kernel header - they do, textually, but return '0' when they're done.

[Daneyon Hansen (danehans)]

I fixed this in my Quantum module several weeks ago: https://github.com/danehans/openstack-quantum-puppet/commits/master

[Ian Wells (ijw-ubuntu)]

No, you didn't. There were at least two bugs in the vswitch module I had
to fix to get this to work reliably.

--
Ian.

On 17/01/2013 00:02, "Daneyon Hansen" <email address hidden> wrote:

>I fixed this in my Quantum module several weeks ago:
>https://github.com/danehans/openstack-quantum-puppet/commits/master
>
>--
>You received this bug notification because you are subscribed to the bug
>report.
>https://bugs.launchpad.net/bugs/1092172
>
>Title:
> openvswitch-switch daemon starts before a datapath is installed
>
>Status in Openstack @ Cisco:
> New
>Status in Cisco Openstack folsom series:
> Triaged
>
>Bug description:
> Seen by John DeN on a compute node. Dependency absent:
> vswitch/manifests/ovs.pp
>
>To manage notifications about this bug go to:
>https://bugs.launchpad.net/openstack-cisco/+bug/1092172/+subscriptions

[Robert Starmer (starmer)]

We are not currently seeing this bug any longer (as of the last major patch set/rework of) puppet-quantum, puppet-vswitch, puppet-openstack.