Re: [openstack-dev] [nova][neutron] Update on Neutron's rolling upgrade support?

[Jay Pipes]

Thanks very much for the update, Ihar, much appreciated!

On 01/26/2016 01:19 PM, Ihar Hrachyshka wrote:

Jay Pipes  wrote:


Hey Sean,

Tomorrow morning UTC, we'll be discussing Neutron topics at the Nova
mid-cycle. Wondering if you might give us a quick status update on
where we are with the Neutron devstack grenade jobs and what your work
has uncovered on the Neutron side that might be possible to discuss in
our midcycle meetup?


Lemme give you some update on the matter.

We experienced some grenade partial job failures in multinode when
creating initial long standing resources:

https://bugs.launchpad.net/neutron/+bug/1527675

That was identified as an MTU issue and to be fixed by a set of patches:

https://review.openstack.org/#/q/topic:multinode-neutron-mtu

The only needed piece not in yet is: https://review.openstack.org/267847
(we need someone from infra to give second +2)

With that, we pass past the resource creation phase and run actual tests
with 3 failures. You can see latest results using the following fake
patch: https://review.openstack.org/265759

Failure logs:
http://logs.openstack.org/59/265759/15/experimental/gate-grenade-dsvm-neutron-multinode/6c1c97b/console.html


All three tests fail when ssh-ing into an instance using br-ex. This may
be another MTU issue, now on br-ex side. We have not identified specific
fixes to merge for that yet.

Hope that helps,

Ihar

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[openstack-dev] [nova][neutron] Update on Neutron's rolling upgrade support?

[Jay Pipes]

Hey Sean,

Tomorrow morning UTC, we'll be discussing Neutron topics at the Nova 
mid-cycle. Wondering if you might give us a quick status update on where 
we are with the Neutron devstack grenade jobs and what your work has 
uncovered on the Neutron side that might be possible to discuss in our 
midcycle meetup?


Thanks!
-jay

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Re: [openstack-dev] [nova][neutron] Update on Neutron's rolling upgrade support?

[Ihar Hrachyshka]

Jay Pipes  wrote:


Hey Sean,

Tomorrow morning UTC, we'll be discussing Neutron topics at the Nova  
mid-cycle. Wondering if you might give us a quick status update on where  
we are with the Neutron devstack grenade jobs and what your work has  
uncovered on the Neutron side that might be possible to discuss in our  
midcycle meetup?


Lemme give you some update on the matter.

We experienced some grenade partial job failures in multinode when creating  
initial long standing resources:


https://bugs.launchpad.net/neutron/+bug/1527675

That was identified as an MTU issue and to be fixed by a set of patches:

https://review.openstack.org/#/q/topic:multinode-neutron-mtu

The only needed piece not in yet is: https://review.openstack.org/267847  
(we need someone from infra to give second +2)


With that, we pass past the resource creation phase and run actual tests  
with 3 failures. You can see latest results using the following fake patch:  
https://review.openstack.org/265759


Failure logs:  
http://logs.openstack.org/59/265759/15/experimental/gate-grenade-dsvm-neutron-multinode/6c1c97b/console.html


All three tests fail when ssh-ing into an instance using br-ex. This may be  
another MTU issue, now on br-ex side. We have not identified specific fixes  
to merge for that yet.


Hope that helps,

Ihar

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Re: [openstack-dev] [nova][neutron] Update on Neutron's rolling upgrade support?

[Sean M. Collins]

Ihar's e-mail summarizes things quite nicely. We have an ongoing topic
of conversation[1] about MTU configuration in Neutron. It is my personal
viewpoint that the current Neutron configuration for MTUs is not
intuitive and can be improved. There are a number of options that you
had to enable in the past, and we are attempting to change Neutron, in
order for things to Just Work™

[1]: http://lists.openstack.org/pipermail/openstack-dev/2016-January/084241.html
-- 
Sean M. Collins

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