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Yep, also note that you have to wait 2x whatever the agent down time is set
to before the rescheduling occurs.

On Aug 6, 2017 20:46, "Curtis" <serverascode at gmail.com> wrote:

> On Sun, Aug 6, 2017 at 8:38 PM, Kevin Benton <kevin at benton.pub> wrote:
> > If you have 'allow_automatic_dhcp_failover' set to True then it will
> > automatically remove networks from DHCP agents that are offline.
> >
> > However, this only applies to networks that are in the
> admin_state_up=True
> > condition. If you explicitly set them to admin_state_up=False then
> automatic
> > rescheduling won't occur. This was intentionally done so operators could
> > avoid having networks rescheduled from DHCP agents they were performing
> > short term maintenance on.
> >
> > So next time just start by shutting the agent down and ensuring that
> > 'allow_automatic_dhcp_failover' is set to True in your server config
> and it
> > should work.
>
> Ok great, that makes sense to me. So if I had that
> allow_automatic_dhcp_failover set, and I was doing maintenance, then I
> could set admin_state_up to false. Or if I was migrating, leave it as
> true. Seems like a good setup.
>
> Thanks,
> Curtis.
>
> >
> > On Sun, Aug 6, 2017 at 3:16 PM, Xav Paice <xavpaice at gmail.com> wrote:
> >>
> >> Yeah, it's an odd one for sure, in my experience at least they do need
> to
> >> be manually re-scheduled.
> >>
> >> On Sun, 6 Aug 2017 at 11:27 Curtis <serverascode at gmail.com> wrote:
> >>>
> >>> I'm in the process of testing out moving around some neutron services.
> >>> I'm starting with dhcp-agent. I've got neutron set to have 3 dhcp
> >>> instances per network.
> >>>
> >>> I set the admin state of a single dhcp agent to down, then all the
> >>> dhcp namespaces were automatically removed from the node running dhcp
> >>> agent. Then I deleted the agent thinking the dhcp services would get
> >>> rescheduled to another node, but they were not. So now I've just got
> >>> two dhcp servers for most networks.
> >>>
> >>> Am I, as admin, expected to now do something like add all the networks
> >>> with only 2 dhcp servers to a new dhcp-agent (using neutron
> >>> dhcp-agent-network-add) or should neutron reschedule them
> >>> automagically?
> >>>
> >>> I'm hoping I just missed a step here. :)
> >>>
> >>> Thanks,
> >>> Curtis.
> >>>
> >>> _______________________________________________
> >>> OpenStack-operators mailing list
> >>> OpenStack-operators at lists.openstack.org
> >>> http://lists.openstack.org/cgi-bin/mailman/listinfo/
> openstack-operators
> >>
> >>
> >> _______________________________________________
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> >> OpenStack-operators at lists.openstack.org
> >> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
> >>
> >
>
>
>
> --
> Blog: serverascode.com
>
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