Upgrading Docker

The only case where special attention is required is for GPU nodes in the development cluster (or any other edge case that has a special configuration contained in the /etc/docker/daemon.json configuration file.

The general procedure is as follows:

1. copy the /etc/docker/daemon.json file aside
2. upgrade docker
3. replace the /etc/docker/daemon.json file
4. restart docker

These steps are implemented for the dev cluster in the 'update-docker.sh' script in the k8s-admin repository on GitLab.