On Wed, Jan 27, 2016 at 4:10 PM, Sean M. Collins <s...@coreitpro.com> wrote: > Hi, > > I started poking a bit at https://bugs.launchpad.net/devstack/+bug/1535661 > > We have radvd processes that the l3 agent launches, and if the l3 agent > is terminated these radvd processes continue to run. I think we should > probably terminate them when the l3 agent is terminated, like if we are > in DevStack and doing an unstack.sh[1]. There's a fix on the DevStack > side but I'm waffling a bit on if it's the right thing to do or not[2]. > > The only concern I have is if there are situations where the l3 agent > terminates, but we don't want data plane disruption. For example, if > something goes wrong and the L3 agent dies, if the OS will be sending a > SIGABRT (which my WIP patch doesn't catch[3] and radvd would continue to run) > or if a > SIGTERM is issued, or worse, an OOM event occurs (I think thats a > SIGTERM too?) and you get an outage.
RDO systemd init script for the L3 agent will send a signal 15 when 'systemctl restart neutron-l3-agent' is executed. I assume Debian/Ubuntu do the same. It is imperative that agent restarts do not cause data plane interruption. This has been the case for the L3 agent for a while, and recently for the OVS agent. There's a difference between an uninstallation (unstack.sh) and an agent restart/upgrade, let's keep it that way :) > > [1]: > https://github.com/openstack-dev/devstack/blob/master/lib/neutron-legacy#L767 > > [2]: https://review.openstack.org/269560 > > [3]: https://review.openstack.org/273228 > -- > Sean M. Collins > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
