Docker on TP workstations

On TP workstations, Docker runs in rootless mode: the container engine executes within your session, without administrator privileges. There is no shared Docker daemon on the machine, and you don't need to install or start anything: everything is ready when you log in.

Docker is ready as soon as you log in

The script /etc/profile.d/62-docker-rootless.sh, executed automatically at each login, configures your environment (UID ranges, environment variables, access to the rootless daemon): the docker and docker compose commands work seamlessly in your session, without any manipulation.

docker run hello-world
docker compose up -d

Where to work with Docker

• Docker must be used in the /home/local/<username>/ directory: this is the machine's local disk, the only location compatible with build contexts and volumes.
• Local volumes must not be mounted in your home /home/local.isima.fr/<username>/: this directory is a network space (encrypted, backed up), not suitable storage for Docker volumes.
• Images and containers remain local to the machine: they disappear at nightly reboot, and the workstation may be reinstalled without notice. Store files to be retrieved from one session to the next in ~/shared (see homedirs), and re-download your images each session.

To remember

• All code must be archived on the GitLab software forge (https://gitlab.isima.fr ).
• To retrieve or publish your images on the ISIMA / LIMOS image registry, use docker login registry.isima.fr as described in the registry documentation.

Alternative: your personal VM

On the VM assigned to you, you are root: using Docker there poses no particular problem — classic installation and daemon, volumes wherever you want, persistent data from one session to the next.