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On 17.10.2018 15:45, Florian Engelmann wrote:
>> On 10.10.2018 09:06, Florian Engelmann wrote:
>>> Now I get you. I would say all configuration templates need to be 
>>> changed to allow, eg.
>>>
>>> $ grep http /etc/kolla/cinder-volume/cinder.conf
>>> glance_api_servers = http://10.10.10.5:9292
>>> auth_url = http://internal.somedomain.tld:35357
>>> www_authenticate_uri = http://internal.somedomain.tld:5000
>>> auth_url = http://internal.somedomain.tld:35357
>>> auth_endpoint = http://internal.somedomain.tld:5000
>>>
>>> to look like:
>>>
>>> glance_api_servers = http://glance.service.somedomain.consul:9292
>>> auth_url = http://keystone.service.somedomain.consul:35357
>>> www_authenticate_uri = http://keystone.service.somedomain.consul:5000
>>> auth_url = http://keystone.service.somedomain.consul:35357
>>> auth_endpoint = http://keystone.service.somedomain.consul:5000
>>>
>>
>> The idea with Consul looks interesting.
>>
>> But I don't get your issue with VIP address and spine-leaf network.
>>
>> What we have:
>> - controller1 behind leaf1 A/B pair with MLAG
>> - controller2 behind leaf2 A/B pair with MLAG
>> - controller3 behind leaf3 A/B pair with MLAG
>>
>> The VIP address is active on one controller server.
>> When the server fail then the VIP will move to another controller 
>> server.
>> Where do you see a SPOF in this configuration?
>>
>
> So leaf1 2 and 3 have to share the same L2 domain, right (in IPv4 
> network)?
>
Yes, they share L2 domain but we have ARP and ND suppression enabled.

It is an EVPN network where there is a L3 with VxLANs between leafs and 
spines.

So we don't care where a server is connected. It can be connected to any 
leaf.


> But we wanna deploy a layer3 spine-leaf network were every leaf is 
> it's own L2 domain and everything above is layer3.
>
> eg:
>
> leaf1 = 10.1.1.0/24
> leaf2 = 10.1.2.0/24
> leaf2 = 10.1.3.0/24
>
> So a VIP like, eg. 10.1.1.10 could only exist in leaf1
>
In my opinion it's a very constrained environment, I don't like the idea.


Regards,

Piotr