docker-basic-commands.md

Docker Basic Commands

## Build Images

• Create image using current directory’s Dockerfile
  docker build -t image-name .

• List images
  docker images

Running Container

• Create new container from specified image
  docker run image-name

• Assign a name to the container
  docker run --name nick-name image-name

• Run image with an entry point | override existing entrypoint
  docker run image-name cmd
docker run image-name --entrypoint cmd

• Run image in interactive mode
  docker run -it image-name

• Run image in detached mode
  docker run -d image-name

• Run image mapping container's port to the host
  docker run -p host-port:container-port image-name

Managing Containers

• List running containers
  docker ps

• List all containers
  docker ps -a

• Stop one or more running containers
  docker stop containerId

• Start one or more stopped containers
  docker start containerId

• Fetch the logs of a container
  docker logs containerId

• Fetch and follow log output of a container
  docker logs -f containerId

• Run a command in a running container in interactive mode
  docker exec -it containerId cmd

• Copy files/folders from container to local filesystem
  docker cp containerId:/workdir/file.ext .

• Copy files/folders from local filesystem to container
  docker cp file.ext containerId:/workdir/

• Remove container
  docker rm containerId

• Remove running container
  docker rm -f containerId

• Remove all running and stopped containers
  docker rm -f $(docker ps -a -q)

Persistant data using Volumes

• Creates a new volume that containers store data
  docker volume create volume-name

• Display detailed information on one or more volumes
  docker volume inspect volume-name

• List volumes
  docker volume ls

• Create a volume and then configure the container to use it
  docker run -v volume-name:/dir/dir container-name

• Create mapping between dir in host and container
  docker run -v $(pwd):/workdir container-name

Managing Images

Tagging Images

• Create tag to the image while building
  docker build -t image-name:tag .

• Create tag to the image after building
  docker image tag src-image:latest dst-image:tag

Saving & Loading Images

• Save one or more images to a tar archive
  docker image save -o image-name.tar image-name:tag

• Load an image from a tar archive
  docker image load -i image-name.tar

Remove Images

• Remove one or more images
  docker image rm image-name
docker rmi image-name

• Remove all images
  docker system prune -a

• Remove all stopped containers
  docker container prune

• Remove all dangling images
  docker image prune

• Remove all unused containers, networks, dangling and unreferenced images
  docker system prune

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Docker Swarm

• Initialize

docker swarm init

• Join Docker Cluster

```` docker swarm join --token SWMTKN-1-3pu6hszjas19xyp7ghgosyx9k8atbfcr8p2is99znpy26u2lkl-1awxwuwd3z9j1z3puu7rcgdbx <manager/worker>:2377 ```

• List Docker Nodes in Swarm Cluster

docker node ls

• List all running applications on this Docker host

docker stack ls

• Run the specified Compose file

docker stack deploy -c <composefile> <STACK_NAME>

• List the services associated with an app

docker stack services <appname>

• List the running containers associated with an app

docker stack ps <appname>

• Tear down an application

docker stack rm <STACK_NAME>alias dstr='docker stack rm'

• Docker Swarm Service list

docker service ls alias dsls='docker service ls'

• List the tasks of one or more services

docker service ps <service_name> alias dsp='docker service ps'

• Docker Swarm Service logs

alias dsl='docker service logs'

• Remove specific docker swarm service

alias dsr='docker service rm'

• Remove unused Containers, Images, Network, etc.

alias sprune='docker system prune'

• Remove unused Volumes

alias vprune='docker volume prune'

• Create Secret

docker secret create <SECRET_NAME> <SECRET_PATH>

• Create Config

docker config create <CONFIG_NAME> <CONFIG_FILE_PATH>