[Openstack] DVR Public IP consumption

Brian Haley haleyb.dev at gmail.com
Tue Jan 16 02:47:00 UTC 2018


On 01/15/2018 01:57 PM, Satish Patel wrote:
> I am planning to build openstack on production and big question is
> network (legacy vs DVR) but in DVR big concern is number of Public IP
> used on every compute node, I am planning to add max 100 node in
> cluster in that case it will use 100 public IP for compute node, Ouch!

You can reduce this public IP consumption by using multiple subnets on 
the external network, with one just for those DVR interfaces. See
https://docs.openstack.org/ocata/networking-guide/config-service-subnets.html
Example #2 for a possible configuration.

As for what type of L3 configuration to run, it seems like you have a 
good idea of some of the trade-offs with each.

-Brian

> If i use legacy compute node then it could be bottleneck or failure
> node if not in HA.
> 
> what most of company use for network node?  DVR or legacy?
> 
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