Why does a compute node require at least 2 network interfaces (minimal architecture ) ??

asked 2017-07-27 18:44:05 -0500

chine.elyes gravatar image

In the documentations , it's written that "The controller node requires a minimum of two network interfaces." for a minimal proof-of-concept architecture. Why so ?

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answered 2017-07-28 09:16:40 -0500

updated 2017-07-28 09:25:06 -0500

Usually in data centers, there are 4 types of networks in an OpenStack deployment. I think the minimum two networks you mentioned are External network and Management Network.

1 External network: this is to access to OpenStack API from the Internet in the case of a public cloud or intranet in the case of a private cloud.

2 Management Network: a private network which is used for communication between the OpenStack control plane and the compute infrastructure. The message bus and database are on this network.

3 Tenant network

4 Storage Network

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answered 2017-07-27 21:23:13 -0500

luowei gravatar image

One for the management network and one for the provider network. If I only have one interface, I just use vlan subinterfaces. https://askubuntu.com/questions/66050...

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Although recommended is 2 network interfaces, yet for Proof-of Concepts [POC], one can easily build the openstack using single interface which will beused for management, tunneling and external connection.

Praveen N gravatar imagePraveen N ( 2017-07-28 00:32:08 -0500 )edit

Hope this link may be of some help OpenStack using packstack http://therandomsecurityguy.com/opens...

Praveen N gravatar imagePraveen N ( 2017-07-28 00:36:29 -0500 )edit

Packstack, by default, uses a single interface.

Bernd Bausch gravatar imageBernd Bausch ( 2017-07-28 01:29:00 -0500 )edit

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Asked: 2017-07-27 18:44:05 -0500

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Last updated: Jul 28 '17