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Can your OpenStack architecture have both self-service & provider networking?

asked 2019-09-06 11:35:24 -0500

dabovard gravatar image

I am trying to set up my OpenStack architecture to have internet connectivity. I have followed the installation guide, but have been confused about the provider networking aspect of it. I set up a self-service network in which all of my instances can communicate with one another, but I am struggling figuring out how to get external internet access.

My nodes all have two NIC's (eth0, and eth1 which are connected to virtual bridges virbr0 and virbr1 respectively on the host). The installation guide eluded that you have to choose between one of the two options (self-service or provider) during neutron configuration.

Can your architecture have both self-service networking and provider networking? If not, how does one gain external access with a self-service network?


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answered 2019-09-07 00:02:47 -0500

In short, the answer is yes.

A self-service network that is not connected to a provider network is possible, but it has no connectivity to anything outside the cloud. So normally you set up an external provider network (or more than one) when you have self-service networks. This is what the installation guide does.

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Thank you for answering so many of my questions! Does the provider Network need to be directly connected to the physical NIC on the host running openstack(right now it's virbr1)? I am trying to set up floating IPs in their own private address space on the provider, but I can't get connectivity.

dabovard gravatar imagedabovard ( 2019-09-07 13:53:31 -0500 )edit

It depends on what you mean by "directly". Example: When you use the ML2 core plugin and the openvswitch mechanism driver, the NIC is plugged into the so-called external bridge. See

Bernd Bausch gravatar imageBernd Bausch ( 2019-09-07 17:08:22 -0500 )edit

Thanks Bernd, will check it out!

dabovard gravatar imagedabovard ( 2019-09-09 11:11:04 -0500 )edit

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Asked: 2019-09-06 11:35:24 -0500

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Last updated: Sep 07 '19