Suggestions for the Docker MAINTAINER directive
Because nobody asked for it, this is my opinion on the use of the
MAINTAINER directive in your Dockerfiles.
The documentation says simply:
The MAINTAINER instruction allows you to set the Author field of the generated images.
Many people end up putting the name and email address of an actual …read more
Using tools badly: time shifting git commits with Workinghours
This is a terrible hack. If you are easily offended by bad ideas implemented poorly, move along!
You are working on a wonderful open source project...but you are not supposed to be working on that project! You're supposed to be doing your real work! Unfortunately, your extra-curricular activity is …read more
Booting cloud images with libvirt
Most major distributions now provide "cloud-enabled" images designed for use in cloud environments like OpenStack and AWS. These images are usually differentiated by (a) being relatively small, and (b) running cloud-init at boot to perform initial system configuration tasks using metadata provided by the cloud environment.
Because of their small …read more
Diagnosing problems with an OpenStack deployment
I recently had the chance to help a colleague debug some problems in his OpenStack installation. The environment was unique because it was booting virtualized aarch64 instances, which at the time did not have any PCI bus support...which in turn precluded things like graphic consoles (i.e., VNC or …read more
Converting hexadecimal ip addresses to dotted quads with Bash
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
bash, because you never know what may or may not be available
in the minimal environment of …