TL/DR;
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$docker login
$docker pull <image>
$docker run -it <image> bash
$exit
$docker ps -a
$docker images
$docker restart
$docker exec -it <container> bash
$docker commit <container> <image>
$docker tag <source> <target> $docker push <image>
$docker rmi <image>
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Image and container
List docker images
List containers
Start a container
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docker run <image>
# example
docker run -v ~/repo/dhub/work:/work -p 8888:8888 --name my-env datascientistus/ds-python-env2
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Stop a container
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docker stop <container or container ID>
# example
docker stop my-env
# or
docker stop a8de52ea8c03
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Remove a container
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docker rm <container or container ID>
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Restart a container
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docker restart <container or container ID>
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Run something with running docker image
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docker run -it ubuntu bash
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Run something (e.g. bash) on running container
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docker exec -it <container or container ID> bash
# For example
docker exec -it 06ac5464b94f bash
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Detatch: Ctrl + p + q
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(Ctrl + p + q)
# read escape sequence
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On the docker container,
exit: stop the container process- detach (
Ctrl + p + q): the container process remains.
Attach: Revisit the detached process
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docker attach <container or container ID>
## for example
% docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
06ac5464b94f ubuntu "bash" 47 minutes ago Up 32 minutes sad_austin
% docker attach 06ac5464b94f
root@06ac5464b94f:/#
# exit stops the container
exit
% docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
06ac5464b94f ubuntu "bash" 49 minutes ago Exited (0) 11 seconds ago sad_austin
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Exercise: restart, exec, exit, see images
Images
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% docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
06ac5464b94f ubuntu "bash" 52 minutes ago Exited (137) 35 seconds ago sad_austin
% docker restart 06ac5464b94f
06ac5464b94f
# Below start the different process
% docker exec -it 06ac5464b94f bash
root@06ac5464b94f:/#
# exit
exit
% docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
06ac5464b94f ubuntu "bash" About an hour ago Up 2 minutes sad_austin
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Commit image
Save local image from a container
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% docker commit 06ac5464b94f ubuntu:updated
sha256:c57dfbc430344f1a469821e20ed01589617e40c57fa58b71792f63b741cb088a
% docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu updated ubuntu latest 37f74891464b 4 weeks ago 69.2MB
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Change docker repository name
As we created a repository named tatoflam/my-ubuntu on docker hub, we need to set the same name for the local image.
In this case,
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% docker tag ubuntu:updated tatoflam/my-ubuntu
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This adds the tag name for the same image:
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% docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu updated c57dfbc43034 13 minutes ago 69.2MB
tatoflam/my-ubuntu latest c57dfbc43034 13 minutes ago 69.2MB
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Tips:
The full image name is <hostname>:<port>/<username>/<repository>:<tag>
For example, registry-1.docker.io/library/ubuntu:latest
Push the docker images
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% docker push tatoflam/my-ubuntu
Using default tag: latest
The push refers to repository [docker.io/tatoflam/my-ubuntu]
40fc4e8520dd: Pushed
c5ca84f245d3: Mounted from library/ubuntu
latest: digest: sha256:1a3c6fc4dc497d324ae307cb081a5ca3a07b083a1ae746ce206be376cb5004f5 size: 736
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Remove the local image and pull the new one on the docker hub
Remove the docker image (with the specific image name)
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% docker rmi tatoflam/my-ubuntu
Untagged: tatoflam/my-ubuntu:latest
Untagged: tatoflam/
my-ubuntu@sha256:1a3c6fc4dc497d324ae307cb081a5ca3a07b083a1ae746ce206be376cb5004f5
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Check the image name removed (the original one remains)
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% docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu updated c57dfbc43034 19 minutes ago 69.2MB
ubuntu latest 37f74891464b 4 weeks ago 69.2MB
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Pull the pushed image from Dockerhub.
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% docker pull tatoflam/my-ubuntu
Using default tag: latest
latest: Pulling from tatoflam/my-ubuntu
Digest: sha256:1a3c6fc4dc497d324ae307cb081a5ca3a07b083a1ae746ce206be376cb5004f5
Status: Downloaded newer image for tatoflam/my-ubuntu:latest
docker.io/tatoflam/my-ubuntu:latest
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Check the image.
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% docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
ubuntu updated c57dfbc43034 19 minutes ago 69.2MB
tatoflam/my-ubuntu latest ubuntu latest 37f74891464b 4 weeks ago 69.2MB
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What docker run does?
- docker run
- run = create(create container) + start (start container and run default command, then exit)
- docker create
- docker ps -a
- docker start
- docker start -a
docker start -a show the output of the default command.
What is docker run "-it"?
- -i : input available
- -t: display format pretty
Stop or(and) remove
- Remove container
- Stop container
- Remove every stopped containers
Name container
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docker run --name <name> <image>
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for example
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docker run --name sample_container ubuntu
tato@tmbp-2330 repo % docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
24778a850909 ubuntu "/bin/bash" 15 seconds ago Exited (0) 14 seconds ago sample_container
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Detached mode and foreground mode
- detached mode : Detach container after run it (background)
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$ docker run -d <image>
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- (short-term) foreground mode : Remove container after exit it (one-time container)
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$ docker run --rm <image>
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For example
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$ docker run -d --name detached_contaner ubuntu
8b26fbe30c045a9d31c0a2524f2bf1703c270006b9796fbe5795d0948f70c01a
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8b26fbe30c04 ubuntu "/bin/bash" 12 seconds ago Exited (0) 11 seconds ago detached_contaner
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$ docker run --rm --name removed_contaner ubuntu "echo" "helloworld"
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8b26fbe30c04 ubuntu "/bin/bash" 2 minutes ago Exited (0) 2 minutes ago detached_contaner
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No container running with --rm as the container is removed.