Docker
Docker a wrapper around LXC. See Docker (software) on enwiki.
Installation
To install Docker on Debian: apt-get install docker.io (note it's NOT just "docker", that's an entirely unrelated package)
Building images
For services we recommend using the Deployment Pipeline which is Blubber. For other docker images, like infrastructure images, we manage them differently.
To just test building a random image a http server without state is a good candidate.
There is a Blubber/Tutorial/HelloWorld that shows how to convert a Blubber file to a Docker file and then build it.
Updating an image
Updating CI docker images
When updating CI images followind the documentation on mediawiki. However the basic process is
- update the changelog of the appropriate to force a docker image
- update the image version in the CI job specification