# Docker cheatsheet ## Docker Registries & Repositories Login to a Registry ```bash docker login docker login localhost:8080 ``` Logout from a Registry ```bash docker logout docker logout localhost:8080 ``` Searching an Image ```bash docker search nginx docker search nginx --stars=3 --no-trunc busybox ``` Pulling an Image ```bash docker pull nginx docker pull eon01/nginx localhost:5000/myadmin/nginx ``` Pushing an Image ```bash docker push eon01/nginx docker push eon01/nginx localhost:5000/myadmin/nginx ``` ## Running Containers Creating a Container ```bash docker create -t -i eon01/infinite --name infinite ``` Running a Container ```bash docker run -it --name infinite -d eon01/infinite ``` Renaming a Container ```bash docker rename infinite infinity ``` Removing a Container ```bash docker rm infinite ``` Updating a Container ```bash docker update --cpu-shares 512 -m 300M infinite ``` ## Starting & Stopping Containers Starting ```bash docker start nginx ``` Stopping ```bash docker stop nginx ``` Restarting ```bash docker restart nginx ``` Pausing ```bash docker pause nginx ``` Unpausing ```bash docker unpause nginx ``` Blocking a Container ```bash docker wait nginx ``` Sending a SIGKILL ```bash docker kill nginx ``` Connecting to an Existing Container ```bash docker attach nginx ``` ## Getting Information about Containers Running Containers ```bash docker ps docker ps -a ``` Container Logs ```bash docker logs infinite ``` Inspecting Containers ```bash docker inspect infinite docker inspect --format '{{ .NetworkSettings.IPAddress }}' $(docker ps -q) ``` Containers Events ```bash docker events infinite ``` Public Ports ```bash docker port infinite ``` Running Processes ```bash docker top infinite ``` Container Resource Usage ```bash docker stats infinite ``` Inspecting Changes to Files or Directories on a Container's Filesystem ```bash docker diff infinite ``` ## Manipulating Images Listing Images ```bash docker images ``` Building Images ```bash docker build . docker build github.com/creack/docker-firefox docker build - < Dockerfile docker build - < context.tar.gz docker build -t eon/infinite . docker build -f myOtherDockerfile . curl example.com/remote/Dockerfile | docker build -f - . ``` Removing an Image ```bash docker rmi nginx ``` Loading a Tarred Repository from a File or the Standard Input Stream ```bash docker load < ubuntu.tar.gz docker load --input ubuntu.tar ``` Save an Image to a Tar Archive ```bash docker save busybox > ubuntu.tar ``` Showing the History of an Image ```bash docker history ``` Creating an Image Fron a Container ```bash docker commit nginx ``` Tagging an Image ```bash docker tag nginx eon01/nginx ``` Pushing an Image ```bash docker push eon01/nginx ``` ## Networking Creating Networks ```bash docker network create -d overlay MyOverlayNetwork docker network create -d bridge MyBridgeNetwork docker network create -d overlay \ --subnet=192.168.0.0/16 \ --subnet=192.170.0.0/16 \ --gateway=192.168.0.100 \ --gateway=192.170.0.100 \ --ip-range=192.168.1.0/24 \ --aux-address="my-router=192.168.1.5" --aux-address="my-switch=192.168.1.6" \ --aux-address="my-printer=192.170.1.5" --aux-address="my-nas=192.170.1.6" \ MyOverlayNetwork ``` Removing a Network ```bash docker network rm MyOverlayNetwork ``` Listing Networks ```bash docker network ls ``` Getting Information About a Network ```bash docker network inspect MyOverlayNetwork ``` Connecting a Running Container to a Network ```bash docker network connect MyOverlayNetwork nginx ``` Connecting a Container to a Network When it Starts ```bash docker run -it -d --network=MyOverlayNetwork nginx ``` Disconnecting a Container from a Network ```bash docker network disconnect MyOverlayNetwork nginx ``` ## Cleaning Docker Removing a Running Container ```bash docker rm nginx ``` Removing a Container and its Volume ```bash docker rm -v nginx ``` Removing all Exited Containers ```bash docker rm $(docker ps -a -f status=exited -q) ``` Removing All Stopped Containers ```bash docker rm `docker ps -a -q` ``` Removing a Docker Image ```bash docker rmi nginx ``` Removing Dangling Images ```bash docker rmi $(docker images -f dangling=true -q) ``` Removing all Images ```bash docker rmi $(docker images -a -q) ``` Stopping & Removing all Containers ```bash docker stop $(docker ps -a -q) && docker rm $(docker ps -a -q) ``` Removing Dangling Volumes ```bash docker volume rm $(docker volume ls -f dangling=true -q) ``` ## Docker Swarm Installing Docker Swarm ```bash curl -ssl https://get.docker.com | bash ``` Initializing the Swarm ```bash docker swarm init --advertise-addr 192.168.10.1 ``` Getting a Worker to Join the Swarm ```bash docker swarm join-token worker ``` Getting a Manager to Join the Swarm ```bash docker swarm join-token manager ``` Listing Services ```bash docker service ls ``` Listing nodes ```bash docker node ls ``` Creating a Service ```bash docker service create --name vote -p 8080:80 instavote/vote ``` Listing Swarm Tasks ```bash docker service ps ``` Scaling a Service ```bash docker service scale vote=3 ``` Updating a Service ```bash docker service update --image instavote/vote:movies vote docker service update --force --update-parallelism 1 --update-delay 30s nginx docker service update --update-parallelism 5--update-delay 2s --image instavote/vote:indent vote docker service update --limit-cpu 2 nginx docker service update --replicas=5 nginx ``` ## Misc Run an image in a container with its name ```bash docker run --rm `docker images --filter reference='*/log-generator' --format '{{.ID}}'` ``` Running a container from an image and open a shell into it with root privileges ```bash docker run --entrypoint="sh" --user=0 --privileged=true : ``` Loading image from file ```bash docker load < Downloads/scratch.tar.gz ``` Running an image with passing a local file as argument (after creating a volume for the file dynamically) - `-ti` for running bash into the container - `--rm` for removing container as soon as we exit ```bash docker run -v /local/file/path/file.txt:/dest/file/path/file.txt -ti --rm some-docker-image:tag arg1 arg2 ``` Logging into AWS-ECR to pull docker images ```bash aws ecr get-login-password --region | docker login --username AWS --password-stdin ".dkr.ecr..amazonaws.com" ``` See the contents (file and directories) inside a docker container: ```bash docker export | tar -t ```