Once OpenStack is installed, we need to do a certain steps before we start the instance for the first time.
Continue reading “Getting started with first instance on OpenStack”
Category: Neutron
OpenStack Liberty on Ubuntu 14.04 and Ubuntu 15.10 – Single machine setup
Install Ubuntu 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. Continue reading “OpenStack Liberty on Ubuntu 14.04 and Ubuntu 15.10 – Single machine setup”
OpenStack Juno on Debian Wheezy – Single Machine setup
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. Continue reading “OpenStack Juno on Debian Wheezy – Single Machine setup”
OpenStack Juno on Ubuntu 14.04 LTS and 14.10 – Single Machine Setup
Install Ubuntu 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. Continue reading “OpenStack Juno on Ubuntu 14.04 LTS and 14.10 – Single Machine Setup”
OpenStack Beginner’s Guide – For Ubuntu Trusty
Version 4 of OpenStack Beginner’s Guide is out. This guide is based on OpenStack Icehouse version. You can download the book by clicking the link below.
L3 connectivity using neutron-l3-agent
The neutron l3 agent is responsible for providing service for routing, natting, security-group rules and floatingip allocation. This purpose of this post is to document its working principles and also to enable users to effectively debug their Openstack cloud(most problems occur due to user mis configuration). The l3 agent offers these services from the network node and relies on neutron-openvswitch-agent to provide l2 connectivity to the instances running on compute nodes. This post assumes that the readers are aware of how l2 connectivity is achieved using ‘openvswitch’ mechanism driver. Continue reading “L3 connectivity using neutron-l3-agent”
L2 connectivity in OpenStack using OpenvSwitch mechanism driver
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.
Continue reading “L2 connectivity in OpenStack using OpenvSwitch mechanism driver”
Managing Openstack Internal/Data/External network in one interface
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
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Open vSwitch in Openstack
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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OpenStack Icehouse on Debian Wheezy – Single Machine setup
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.
Continue reading “OpenStack Icehouse on Debian Wheezy – Single Machine setup”
