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Understand all kinds of networks in openstack

asked 2019-08-16 01:48:58 -0500

sakiraa gravatar image

I am learning Openstack. In the learning process, there are so many kinds of networks that is confusing. Could someone help me this? I am very appreciated for your help!

  • Is it DATA NETWORK is VM TRAFFIC NETWORK?
  • Is it EXTERNAL NETWORK is PUBLIC NETWORK or PROVIDER NETWORK?
  • What about Tenant Network?
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answered 2019-08-16 02:50:42 -0500

updated 2019-08-16 02:55:29 -0500

Yes, the term data network is sometimes used for the network that carries traffic to and from VMs. It's a network underlying the cloud; it is not visible to cloud users.

What do you mean by PUBLIC NETWORK? I have not heard the term in the context of OpenStack, although it could be synonymous to external network. An external network is indeed a provider network (but a provider network does not have to be external).

Tenant network is usually a network that doesn't directly correspond to a physical network or VLAN and can be created and deleted by a non-privileged user.

Please be aware that these terms are not necessarily very well defined. But you could say something like this: "My cloud uses VXLAN tunnels to implement tenant networks. The data network on which those tunnels are created has a speed of 100Gbit/s. My cloud has two external networks that correspond to VLANs in the datacentre."

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I read Public Networkdefinition from this https://github.com/ChaimaGhribi/OpenStack-Juno-Installation/blob/master/OpenStack-Juno-Installation.rst (https://github.com/ChaimaGhribi/OpenS...) But I do not know what virtualbox network adapter should I use to create Public Network ( NAT, Host Only or Internal Network) ?

sakiraa gravatar imagesakiraa ( 2019-08-16 07:18:18 -0500 )edit

Public network on the Github page = external network. I would just use bridged networks.

However, to save you from tears: Don't use Juno installation instructions for current or recent OpenStack releases. There is a very high chance they won't work, since many configuration settings have changed.

Bernd Bausch gravatar imageBernd Bausch ( 2019-08-16 07:36:55 -0500 )edit

Regarding VIrtualBox networking: You need internet connection for the installation, so NAT or bridged is required.

Bernd Bausch gravatar imageBernd Bausch ( 2019-08-16 07:44:52 -0500 )edit

Thank you but following the openstack guideline is too hard for me. I really need something step-by-step like the github link.

sakiraa gravatar imagesakiraa ( 2019-08-16 08:10:02 -0500 )edit

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Asked: 2019-08-16 01:48:58 -0500

Seen: 31 times

Last updated: Aug 16