Converting hexadecimal ip addresses to dotted quads with Bash

Sun 08 March 2015 by Lars Kellogg-Stedman Tags bash docker

This is another post that is primarily for my own benefit for the next time I forget how to do this.

I wanted to read routing information directly from /proc/net/route using bash, because you never know what may or may not be available in the minimal environment of …

read more

Unpacking Docker images with Undocker

Fri 13 February 2015 by Lars Kellogg-Stedman Tags docker

In some ways, the most exciting thing about Docker isn't the ability to start containers. That's been around for a long time in various forms, such as LXC or OpenVZ. What Docker brought to the party was a convenient method of building and distributing the filesystems necessary for running containers …

read more

Installing nova-docker with devstack

Wed 11 February 2015 by Lars Kellogg-Stedman Tags openstack docker devstack

This is a long-form response to this question, and describes how to get the nova-docker driver up running with devstack under Ubuntu 14.04 (Trusty). I wrote a similar post for Fedora 21, although that one was using the RDO Juno packages, while this one is using devstack and the …

read more

External networking for Kubernetes services

Tue 10 February 2015 by Lars Kellogg-Stedman Tags docker kubernetes

I have recently started running some "real" services (that is, "services being consumed by someone other than myself") on top of Kubernetes (running on bare metal), which means I suddenly had to confront the question of how to provide external access to Kubernetes hosted services. Kubernetes provides two solutions to …

read more

Installing nova-docker on Fedora 21/RDO Juno

Fri 06 February 2015 by Lars Kellogg-Stedman Tags docker openstack nova

This post comes about indirectly by a request on IRC in #rdo for help getting nova-docker installed on Fedora 21. I ran through the process from start to finish and decided to write everything down for posterity.

Getting started

I started with the Fedora 21 Cloud Image, because I'm installing …

read more