L2 connectivity is the most basic requirement in a network. All cloud platforms allow users to create subnets. Subnets are L2 segments to which the servers attach their interfaces to and start sending and receiving traffic. Servers on the same L2 segment can reach each other directly. They only need to resolve the destination MAC address using ARP. In the world of networking this service is provided by your access switch.
A common problem for people who want to try Openstack without a full blown hardware setup is that they have just one network interface. Openstack identifies three distinct networks
A multitude of Openstack users eventually run into Open vSwitch. Not because they want to, but because they have to. So here is something to deconstruct what Open vSwitch really is, and what it does.
What is Open vSwitch?
In the words of the Open vSwitch website:
“Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license. It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces and protocols (e.g. NetFlow, sFlow, SPAN, RSPAN, CLI, LACP, 802.1ag).”
Openstack uses Open vSwitch as its default virtual switch. There are various reasons for this. The primary reason is VLAN support. Open vSwitch is inherently built with VLAN support, and Openstack uses VLANs extensively to differentiate between its virtual networks. Also, Open vSwitch is works very well in a distributed environment. This is extremely important in a platform like…
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Install Debian 7 with partitioning scheme as per your requirements.
Note: Run all the commands as root. We assume that the IP of the Single machine is 10.0.0.1.
The Single machine setup has all the services running. Cinder part is to be added in the future.
Install Ubuntu 12.04 with partitioning scheme as per your requirements.
Note: Run all the commands as super-user. We assume that the IP of the Single machine is 10.0.0.1.
The following procedure can be used to install OpenStack Grizzly on Ubuntu 12.04 LTS
Quantum control flow by Johnson D is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.