PODMAN: ‘overlay’ is not supported over xfs

I *love* Podman. While Podman purports to be a way to test and troubleshoot Pods - "the smallest deployable units of computing that can be created and managed in Kubernetes" - where its real value lies for me and my coworkers is as a non-root, daemonless, drop-in replacement for Docker. We can run containers on … Continue reading PODMAN: ‘overlay’ is not supported over xfs

Statement of GPG Key Transition

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1,SHA512 Fri Dec 9 11:49:22 EST 2016 Statement of GPG Key Transition ------------------------------- In order to replace my older DSA-1024 key, I have set up a new OpenPGP key, and will be transitioning away from my old key. The old key will continue to be valid until 2017-06-01, but future … Continue reading Statement of GPG Key Transition

When Systemd, Docker and Golang Butt Heads

Image by Marius Kallhardt from near Bremen, Germany Creative Commons Attribution-Share Alike 2.0 Generic License We ran into a fun little bug this week at work that took a good while to track down to it's source.  Imagine this scenario: We start to receive reports that Docker has restarted, causing containers running on the hosts to … Continue reading When Systemd, Docker and Golang Butt Heads

Quick Tip – Docker ENV variables

It took me a little while to notice what was happening here, so I'm writing it down in case someone else needs it. Consider this example Dockerfile: FROM centos:centos7 MAINTAINER Chris Collins ENV VAR1="foo" ENV VAR2="bar" It's common practice to collapse the ENV lines into a single line, to save a layer: FROM centos:centos7 MAINTAINER Chris … Continue reading Quick Tip – Docker ENV variables