[Openstack-operators] Neutron DHCP failover bug

Assaf Muller amuller at redhat.com
Thu Oct 1 00:52:19 UTC 2015


On Wed, Sep 30, 2015 at 7:25 PM, Sam Morrison <sorrison at gmail.com> wrote:

>
> On 30 Sep 2015, at 3:48 pm, John Dewey <john at dewey.ws> wrote:
>
> Why not run neutron dhcp agents on both nodes?
>
>
> Yeah have tried this too.
>
> We don’t do this due to metadata, DHCP adds a static route to the metadata
> agent (which is the same as the network node running DHCP). If the network
> node is down the instances loose metadata if they happened to get a lease
> from that DHCP server. With failover the IP address transfers to the other
> network node and metadata keeps working for all.
>

That's interesting. Looks like DHCP A/A only works if you use your (HA)
routers to provide metadata, then.


>
> Make sense?
>
> Sam
>
>
>
> _______________________________________________
> OpenStack-operators mailing list
> OpenStack-operators at lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstack.org/pipermail/openstack-operators/attachments/20150930/45e127c6/attachment.html>


More information about the OpenStack-operators mailing list