Open Stack

On 01/16/2018 08:37 AM, Satish Patel wrote:
> Thanks Brian,
> 
> I may having difficulty to understand that example, if I have only /24 public subnet for cloud and have 200 compute node then how does it work?

The intention is to have a second subnet on the external network, but 
only have it usable within the datacenter.  If you create it and set the 
service-type to only certain types of ports, like DVR, then it won't be 
used for floating IP as the other one is.

-Brian

>> On Jan 15, 2018, at 9:47 PM, Brian Haley <haleyb.dev at gmail.com> wrote:
>>
>>> 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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