Docker Commands Cheat Sheet

docker build with a tag ``` docker build -t wingkwong/example:latest . ``` Run a simple container using the hello-world image: ``` docker run hello-world ``` Run a container using a specific image tag: ``` docker run nginx:1.15.11 ``` Run a container with a command and arguments: ``` docker run busybox echo hello world! ``` Run an Nginx container customized with a variety of flags: - -d: Run container in detached mode. The **docker run** command will exit immediately and the container will run in the background - --name: A container is assigned a random name by default, but you can give it a more descriptive name with this flag - --restart: specify when the container should be automatically restarted - no(default): never restart the container - on-failure: only if the container fails (exits with a non-zero exit code) - always: always restart the container whether it succeeds or fails. Also starts the container automatically on daemon startup - unless-stopped: always restart the container whether it succeeds or fails, and on daemon startup, unless the container was manually stopped ``` docker run -d --name nginx --restart unless-stopped -p 8080:80 --memory 500M --memory-reservation 256M nginx ``` List any currently running containers: ``` docker ps ``` List all containers, both running and stopped: ``` docker ps -a ``` Stop the Nginx container: ``` docker container stop nginx ``` Start a stopped container: ``` docker container start nginx ``` Delete a container (but it must be stopped first): ``` docker container rm nginx ``` Downgrade to a previous version： ``` sudo systemctl stop docker sudo apt-get remove -y docker-ce docker-ce-cli sudo apt-get update sudo apt-get install -y docker-ce=5:18.09.4~3-0~ubuntu-bionic docker-ce-cli=5:18.09.4~3-0~ubuntu-bionic docker version ``` Upgrade to a new version: ``` sudo apt-get install -y docker-ce=5:18.09.5~3-0~ubuntu-bionic docker-ce-cli=5:18.09.5~3-0~ubuntu-bionic docker version ``` Check the current default logging driver: ``` docker info | grep Logging ``` Edit daemon.json to set a new default logging driver configuration: ``` sudo vi /etc/docker/daemon.json { "log-driver": "json-file", "log-opts": { "max-size": "15m" } } ``` Restart docker ``` sudo systemctl restart docker ``` Run a docker container, overriding the system default logging driver settings: ``` docker run --log-driver json-file --log-opt max-size=50m nginx ``` Install Docker Engine： ``` sudo apt-get update sudo apt-get -y install \ apt-transport-https \ ca-certificates \ curl \ gnupg-agent \ software-properties-common curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - sudo apt-key fingerprint 0EBFCD88 sudo add-apt-repository \ "deb [arch=amd64] https://download.docker.com/linux/ubuntu \ $(lsb_release -cs) \ stable" sudo apt-get update sudo apt-get install -y docker-ce=5:18.09.5~3-0~ubuntu-bionic docker-ce-cli=5:18.09.5~3-0~ubuntu-bionic containerd.io sudo usermod -a -G docker cloud_user ``` Initialize Docker Swarm ``` docker swarm init --advertise-addr ``` View the current state of the swarm: ``` docker info ``` List the current nodes in the swarm and their status: ``` docker node ls ``` Get a join token from the manager. Run this command on the swarm manager: ``` docker swarm join-token worker ``` Copy the docker swarm join command provided in the output and run it on both workers: ``` docker swarm join --token :2377 ``` Docker Swarm Backup (on manager) ``` sudo systemctl stop docker sudo tar -zvcf backup.tar.gz -C /var/lib/docker/swarm sudo systemctl start docker ``` Docker Swarm Restore (on manager) ``` sudo systemctl stop docker sudo rm -rf /var/lib/docker/swarm/* sudo tar -zxvf backup.tar.gz -C /var/lib/docker/swarm/ sudo systemctl start docker docker node ls ``` View file system layes in an image. Nginx as an example ``` docker image history nginx ``` Delete an iamge. Nginx as an example ``` docker image rm nginx:1.14.0 ``` Download an image ``` docker image pull nginx:1.14.0 ``` List images on the system: ``` docker image ls docker image ls -a ``` Force Deleteion of an image used by a container ``` docker run -d --name nginx nginx:1.14.0 docker image rm -f nginx:1.14.0 ``` Delete an iamge. Nginx as an example ``` docker image rm nginx:1.14.0 ``` Locate a dangling image and clean it up. Nginx as an example ``` docker image ls -a docker container ls docker container rm -f nginx docker image ls -a docker image prune ``` Inspect image metadata. Nginx as an example ``` docker image inspect nginx:1.14.0 docker image inspect nginx:1.14.0 --format "{{.Architecture}}" docker image inspect nginx:1.14.0 --format "{{.Architecture}} {{.Os}}" ``` Enable Docker Swarm autolock ``` docker swarm update --autolock=true ``` Unlock the swarm using the unlock key ``` docker swarm unlock ``` Get the current unlock key ``` docker swarm unlock-key ``` Rotate the unlock key ``` docker swarm unlock-key -rotate ``` Disable autolock ``` docker swarm update --autolock=false ``` Start Compose application with detached mode: ``` docker-compose up -d ``` Stop Compose application ``` docker-compose down ``` List the Docker Compose container ``` docker-compose ps ``` Deploy a new Stack to the cluster using a compose file ``` docker stack deploy -c ``` List current stacks ``` docker stack ls ``` List the tasks associated with a stack ``` docker stack ps ``` List the services associated with a stack ``` docker stack services ``` Delete a stack ``` docker stack rm ```