Neutron metadata proxy should be checked for liveness periodically

[Brian Haley]

We've seen at least one occurrence where the metadata proxy in the namespace has died, leading to unusable instances since their metadata requests fail to get required objects such as ssh keys.

The l3-agent can easily check all of it's sub-processes are still running, I have a small patch that can do this, along with a configuration option to enable it so users can choose not to run it.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/59997

[Mark McClain (markmcclain)]

Seems like this is something worth reviving.

[Brian Haley (brian-haley)]

Yes, agreed, I will update it for Juno as there are now some other things started from the l3-agent that probably want to be monitored as well.

[Brian Haley (brian-haley)]

This issue is now fixed in Kilo (or before?) with the ProcessMonitor changes in Neutron - the spawned metadata proxy is now "watched" and restarted if the user enables it. So this can be closed.

[Miguel Angel Ajo (mangelajo)]

Yes, this was fixed by Mike kolesnik or Assaf Muller I think.

Can't remember now.