Filtering libvirt XML in Nova

Thu 05 February 2015 by Lars Kellogg-Stedman Tags openstack nova

I saw a request from a customer float by the other day regarding the ability to filter the XML used to create Nova instances in libvirt. The customer effectively wanted to blacklist a variety of devices (and device types). The consensus seems to be "you can't do this right now …

read more

Docker vs. PrivateTmp

Sun 18 January 2015 by Lars Kellogg-Stedman Tags docker systemd namespaces

While working with Docker the other day, I ran into an undesirable interaction between Docker and systemd services that utilize the PrivateTmp directive.

The PrivateTmp directive, if true, "sets up a new file system namespace for the executed processes and mounts private /tmp and /var/tmp directories inside it that …

read more

Running nova-libvirt and nova-docker on the same host

Sat 17 January 2015 by Lars Kellogg-Stedman Tags openstack docker

I regularly use OpenStack on my laptop with libvirt as my hypervisor. I was interested in experimenting with recent versions of the nova-docker driver, but I didn't have a spare system available on which to run the driver, and I use my regular nova-compute service often enough that I didn't …

read more

Building a minimal web server for testing Kubernetes

Sun 04 January 2015 by Lars Kellogg-Stedman Tags docker kubernetes

I have recently been doing some work with Kubernetes, and wanted to put together a minimal image with which I could test service and pod deployment. Size in this case was critical: I wanted something that would download quickly when initially deployed, because I am often setting up and tearing …

read more

Accessing the serial console of your Nova servers

Mon 22 December 2014 by Lars Kellogg-Stedman Tags openstack nova

One of the new features available in the Juno release of OpenStack is support for serial console access to your Nova servers. This post looks into how to configure the serial console feature and then how to access the serial consoles of your Nova servers.

read more