Docker and Java, notes from the Montreal JUG presentation

On Thursday the 28th of January 2016, I gave a talk on Docker and Java.

Here are some notes on this presentation.

Get the slides / demos code / comments

Some Docker related tools can’t use the Unix Socket and TLS is a pain for a demo

Well, you see what I mean : sometimes it’d be nice to open a non secured connection to a local Docker daemon (see this jenkins docker plugin issue for example), through a TCP port.

Since you can’t open both secured AND non secured port on the same Docker daemon, then you can use socat to the rescue.

Here is a Docker image to use socat to pipe a Docker unix socket to a TCP non secured port – so that you can still use those tools that require access to a Docker daemon, without disabling your daemon TLS config.

Jenkins has a nice way to extend its Docker image

Using a plugins.txt file, you can easily create a Jenkins Docker image that suits your needs, see this image of Jenkins that embeds few Docker plugins


It was a very nice experience to give this talk in front of the MontrealJUG crowd :

  • a lot of good questions, I learned a few things (TravisCI can build Docker images, I’m not the only one struggling to share docker-machine configurations on several laptops, volume is the one topic that makes everybody anxious : « how can I share them across different hosts ? », « what to use to back them up efficiently ? », etc.)
  • I did not know how long it would take to show all the demos and slides, and I let questions flow as I gave the talk : I was not done after 2 hours, so even if the organizers let me (almost) finish, some attendees got frustrated as they had to return home before the end :-(
  • Internet connection is hard : I could ssh to my azure box (where my daemon was running : to make pull / push fast), but not to the Docker daemon listening on 2376 – always have a VPN connection handy : it saved my talk.

I hope to give another talk there another time !


Laisser un commentaire

Votre adresse de messagerie ne sera pas publiée.

Le temps imparti est dépassé. Merci de saisir de nouveau le CAPTCHA.

Ce site utilise Akismet pour réduire les indésirables. En savoir plus sur comment les données de vos commentaires sont utilisées.