Recently, I installed latest docker on my machine. But I noticed lots of new features, commands and aliases to the existing commands and felt it was worth posting.
Docker version that I installed is 17.03.0-ce, Click here to know how to install Docker
- As we can see in docker help, commands are grouped as management commands under names like container, network, image, etc as per their purpose.
$ docker --help Usage: docker COMMAND A self-sufficient runtime for containers ... ... Management Commands: container Manage containers image Manage images network Manage networks node Manage Swarm nodes plugin Manage plugins secret Manage Docker secrets service Manage services stack Manage Docker stacks swarm Manage Swarm system Manage Docker volume Manage volumes Commands: ... ... Run 'docker COMMAND --help' for more information on a command.
- For example, Under
docker container, all commands related to managing to containers are classified.
$ docker container --help Usage: docker container COMMAND Manage containers Options: --help Print usage Commands: attach Attach to a running container commit Create a new image from a container's changes cp Copy files/folders between a container and the local filesystem create Create a new container ... ... wait Block until one or more containers stop, then print their exit codes Run 'docker container COMMAND --help' for more information on a command.
- There is new feature here, which makes plugin management in docker easier, now we can easily install or delete or get information about plugins.
$ docker plugin --help Usage: docker plugin COMMAND Manage plugins Options: --help Print usage Commands: create Create a plugin from a rootfs and configuration. Plugin data directory must contain config.json and rootfs directory. disable Disable a plugin enable Enable a plugin inspect Display detailed information on one or more plugins install Install a plugin ls List plugins push Push a plugin to a registry rm Remove one or more plugins set Change settings for a plugin upgrade Upgrade an existing plugin
docker container lsis same as
$ docker container ls -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 66d17f3bc07e hello-world "/hello" About a minute ago Exited (0) About a minute ago ecstatic_lamarr
docker image lsis same as
# docker image ls REPOSITORY TAG IMAGE ID CREATED SIZE fedora latest 0047cca29c6f 5 days ago 230 MB hello-world latest 48b5124b2768 2 months ago 1.84 kB
docker system command added:
docker system df- Show docker disk Usage
# docker system df TYPE TOTAL ACTIVE SIZE RECLAIMABLE Images 1 0 1.84 kB 1.84 kB (100%) Containers 0 0 0 B 0 B Local Volumes 0 0 0 B 0 B
docker system events- Get real time events (like oc get events in openshift)
docker system info- Displays System-wide information
docker system prune- Removes unused data
WARNING! This will remove: - all stopped containers - all volumes not used by at least one container - all networks not used by at least one container - all dangling images Are you sure you want to continue? [y/N]
prune feature added:
docker container prune- Remove all stopped containers
docker image prune- Remove unused images
docker network prune- Remove all unused networks
docker volume prune- Remove all unused volumes
above all things can be achieved by using one command also,
docker system prune(WARNING!, be careful with this command.)
- Click here for more command line reference.