Posts

Post - DEVCONF.cz 2019

This weekend, from the 25th until the 27th of January, the DEVCONF.cz took place at the Faculty of Information Technology Brno (Czech Republic) and I’ve got the chance to attend. As an Open Source addicted community driven conference, which is mainly sponsored by Red Hat there was no ticket charge, but a free ticket registration was required. Read more...

January 2019

Post - Site Reliability Engineering

The two weeks Holidays vacation is over, we are back at work and the Docker Swarms ran fully unattended without a single outage during this period! For every IT engineer reliability may be something different because it depends upon which goals you have to achieve with your team. Read more...

January 2019

Post - Condense DockerCon EU 2018 Barcelona

This year we had the great opportunity to attend to DockerCon EU 2018 at Barcelona with four people. Two of us, Alex and Martin are developers, and Bernhard and I are operators so we did a real DevOps journey! The decision to go with both teams, in terms of DevOps, was the best we ever made and we are very thankful that our company, STRABAG BRVZ supported this idea. In fact, there were a lot of topics which were developer focused and in parallel there were also a lot of breakouts that were more operator focused. So we’ve got the best of both world Read more...

December 2018

Post - Running Play with Docker on AWS

Some weeks ago I dived a little bit into the Play with Docker GitHub repository because I would like to run Play With Docker (called PWD) locally to have a backup option during a Docker Meetup if something would be wrong with the internet connectivity or with the Docker prepared workshop sessions. Read more...

December 2018

Post - Docker, block I/O and the black hole

Last week, Bernhard and I had to investigate high disk I/O load reported by one of our storage colleagues on our NFS server which serves the data for our Docker containers. We still have high disk load, because we are running lots of containers and therefore this post is will not resolve a load issue but it will give you some deep insights about some strange behaviors and technical details which we discovered during our I/O deep dive. Read more...

October 2018

Post - Writing a Docker Volume Plugin for CephFS

Currently we are evaluating Ceph for our Docker/Kubernetes on-premise cluster for persistent volume storage. Kubernetes officially supports CephRBD and CephFS as storage volume driver. Docker does not offer a Docker Volume plugin for CephFS currently. Read more...

September 2018

Post - Docker Swarm Network – Down the Rabbit Hole

Last week we tracked down a recurring problem with our Docker Swarm, more exactly with the Docker overlay network. To anticipate it, there is a merge which might fix this, but not for Docker-CE 18.03 . The pull mentioned is also not included in Docker-CE 18.06.1 but it is already merged into Moby and part of Docker-CE 18.09.0-ce-tp5 which means that the fix should be available with Docker-CE 18.09. Read more...

August 2018

Post - A way to DevOps - About failure culture and the five whys

After my talks I am regularly asked how we managed it to tear down the wall between Operations and Development. Read more...

February 2018
Nifty tech tag lists from Wouter Beeftink