To output a list of all containers execute the docker ps.
The command takes a name or ID of a container on the system. To clean up old containers from a Docker host you use the docker rm command. There is not automated process to clean up old, unused volumes. Volumes are similar to container layers in that they are only removed manually. It also leaves a lot of cruft behind until those layers are manually removed. This significanlty speeds up the Docker build processes. Each container is given a unique hash, and any new actions that mirror that already creater layer use that layer instead of creating a new one. The reason old container layers are left on disk is for cache reasons. As time goes on these orphaned containers eat up unnecessary disk space that can easily be reclaimed. As we change actions old container layers are orphaned and replaced by new container layers. This information is especially useful for anyone running a docker development environment, where frequent image builds and runs are not uncommon.ĭocker images and containers consist of several container layers, one for each action in a Dockerfile.
In this tutorial, you will learn how to remove Docker containers and volumes from your Docker host. Docker volumes containers Learn how to delete old and unsused Docker containers and volumes and reclaim free space on your host