[Openstack] [OpenStack][Compute-Neutron] Is it possible to create flat network from different NICs

[Soheil Pourbafrani]

Hi,

I installed OpenStack on One node (for test) and creating a flat external
network I could connect VMs to the provider network (internet).

In the production environment, we have 4 NIC on each server and each server
(compute node) will run 4 instances. My question is, is it possible to
create a separate external network based on each NIC (so 4 external
networks) and run each instance using one of them?

[Slawomir Kaplonski]

Hi,

Yes, that should be possible. You can create 4 bridges on compute node and add all of them to bridge_mappings config option.
Then You can create 4 networks with different physical_network for each of them and agent will know which bridge should be used for ports from each network.
It is described e.g. in [1].

[1] https://ask.openstack.org/en/question/94206/how-to-understand-the-bridge_mappings/?answer=94230#post-id-94230

Hi,
I installed OpenStack on One node (for test) and creating a flat external network I could connect VMs to the provider network (internet).
In the production environment, we have 4 NIC on each server and each server (compute node) will run 4 instances. My question is, is it possible to create a separate external network based on each NIC (so 4 external networks) and run each instance using one of them?
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—
Slawek Kaplonski
Senior software engineer
Red Hat


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[Soheil Pourbafrani]

Thanks a lot.

Post by Slawomir Kaplonski
Hi,
Yes, that should be possible. You can create 4 bridges on compute node and
add all of them to bridge_mappings config option.
Then You can create 4 networks with different physical_network for each of
them and agent will know which bridge should be used for ports from each
network.
It is described e.g. in [1].
[1]
https://ask.openstack.org/en/question/94206/how-to-understand-the-bridge_mappings/?answer=94230#post-id-94230

Post by Soheil Pourbafrani
Hi,
I installed OpenStack on One node (for test) and creating a flat

external network I could connect VMs to the provider network (internet).

Post by Soheil Pourbafrani
In the production environment, we have 4 NIC on each server and each

server (compute node) will run 4 instances. My question is, is it possible
to create a separate external network based on each NIC (so 4 external
networks) and run each instance using one of them?

Post by Soheil Pourbafrani
_______________________________________________

http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
—
Slawek Kaplonski
Senior software engineer
Red Hat