Quantum in Too Much Detail

Thu 14 November 2013 by Lars Kellogg-Stedman Tags openstack quantum networking

I originally posted this article on the RDO website.

The players

This document describes the architecture that results from a particular OpenStack configuration, specifically:

  • Quantum networking using GRE tunnels;
  • A dedicated network controller;
  • A single instance running on a compute host

Much of the document will be relevant to other …

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Moving to GitHub

Wed 13 November 2013 by Lars Kellogg-Stedman Tags blog

This blog has been hosted on scriptogram for the past year or so. Unfortunately, while I like the publish-via-Dropbox mechanism, there have been enough problems recently that I've finally switched over to using GitHub Pages for hosting. I've been thinking about doing this for a while, but the things that …

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A random collection of OpenStack Tools

Tue 12 November 2013 by Lars Kellogg-Stedman Tags openstack

I've been working with OpenStack a lot recently, and I've ended up with a small collection of utilities that make my life easier. On the odd chance that they'll make your life easier, too, I thought I'd hilight them here.


Crux is a tool for provisioning tenants, users, and …

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Why does the Neutron documentation recommend three interfaces?

Mon 28 October 2013 by Lars Kellogg-Stedman Tags openstack neutron networking

The documentation for configuring Neutron recommends that a network controller has three physical interfaces:

Before you start, set up a machine to be a dedicated network node. Dedicated network nodes should have the following NICs: the management NIC (called MGMT_INTERFACE), the data NIC (called DATA_INTERFACE), and the external NIC (called …

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Automatic hostname entries for libvirt domains

Fri 04 October 2013 by Lars Kellogg-Stedman Tags libvirt virtualization

Have you ever wished that you could use libvirt domain names as hostnames? So that you could do something like this:

$ virt-install -n anewhost ...
$ ssh clouduser@anewhost

Since this is something that would certainly make my life convenient, I put together a small script called virt-hosts that makes this possible …

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