Neutron dvr and vrrp config [closed]

asked 2014-11-15 13:12:43 -0500

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Hi, I've been looking all over the internet for a tutorial for configuring dvr and vrrp. I didnt find any! Can someone help me with this? I have 2 controller/network nodes and 3 compute nodes.

As i understand i now need the l3 agent on the compute nodes too because they will be handling the floating ip's insttead of the network node!

From what i understood i must enable on network nodes: l3_ha=true in neutron.conf for l3 agent HA and keepalive with VIP; router_distributed = True into neutron.conf; agent_mode = dvr_snat in l3_agent.ini; l2_population = True, tunnel_types = vxlan, enable_distributed_routing = True and append l2population to mechanism_drivers in ml2.conf under [agent] section;

On compute nodes i must edit: router_distributed = True in neutron.conf; agent_mode = dvr in l3_agent.ini and the same config as the controller on ml2_config.ini.

Ofcourse i need access to the external network on the compute nodes. Does the ml2 config under the [agent] section brakes my tenant network type that is gre?

Is there anything that i'm missing? Because i cannot figure this out!

Thank you!

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Closed for the following reason the question is answered, right answer was accepted by capsali
close date 2015-09-24 10:41:10.032993

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answered 2015-09-12 10:03:25 -0500

dbaxps

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updated 2015-09-12 10:15:43 -0500

I believe that @Anil is correct, you are mixing up thing which don't work both at a time (in Juno Release)
Post bellow is providing details of explanation given you above
https://kimizhang.wordpress.com/2014/...
Current status of problem maybe seen :-
1. https://bugs.launchpad.net/neutron/+b...
2. https://etherpad.openstack.org/p/DVR_...

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answered 2014-11-15 23:24:19 -0500

Anil

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looks like you are mixing 2 different ways to achieve HA for L3 As per my understanding either one should be used L3 agent with VRRP + keeplived or DVR with L3 on compute nodes.

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But as i understood we need l3 agent on controller nodes for snat that serves all of the vm's. If neteork node fails no more snat. That is why ibthought i needed l3_ha on network nodes. I could have misinterpreted this though!

capsali ( 2014-11-16 05:54:14 -0500 )edit

In Juno a router cannot be HA and DVR at the same time.

darragh-oreilly ( 2014-11-17 14:18:40 -0500 )edit

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answered 2014-11-17 07:31:56 -0500

mikemowgli
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I'm also interested in such a tutorial. From what I've read so far, DVR and VRRP, which are 2 ways to achieve HA, and could be combined. This is the best I found: http://assafmuller.com/2014/08/16/layer-3-high-availability/ (http://assafmuller.com/2014/08/16/lay...)