Docker

Krishna Neupane

Jan 2, 2023

Getting Started

The getting started guide on Docker has detailed instructions for setting up Docker.

After setup is complete, run the following commands to verify the success of installation:

Docker Cheatsheet for Beginners

This cheatsheet is a beginner-friendly guide to Docker commands, covering the most commonly used commands for running and managing containers, working with images, and networking. It also includes a section on Docker Compose, which is a tool for defining and running multi-container applications. This cheatsheet is designed to help new users get started with Docker and become familiar with the most essential commands in a concise and easy-to-follow format.

Running and managing containers

Run a container from an image

docker start <container_id>: Start a stopped container
docker stop <container_id>: Stop a running container
docker kill <container_id>: Forcefully stop a running container
docker attach <container_id>: Attach to a running container
docker exec -it <container_id> <command>: Run a command in an interactive shell in a running container
docker rm <container_id>: Remove a stopped container
docker inspect <container_id>: Inspect a container
docker logs <container_id>: View logs for a container
docker top <container_id>: View processes in a container

Managing images

docker images: List available images
docker rmi <image_id>: Remove an image
docker history <image_id>: View the history of an image
docker pull <image>: Download an image from a registry (e.g., Docker Hub)
docker build -t <name> .: Build an image from a Dockerfile in the current directory and give it the specified name
docker push <image>: Push an image to a registry
docker tag <image_id> <tag>: Tag an image

Managing container resources

docker run --cpus=<num> <image>: Limit the number of CPU cores available to a container
docker run --memory=<size> <image>: Limit the amount of memory available to a container

Managing container metadata

docker run --name=<name> <image>: Assign a name to a container
docker run -e <key>=<value> <image>: Set an environment variable in a container

Managing container users

docker run --user=<user> <image>: Run a container as a specific user
docker run --user=<uid>:<gid> <image>: Run a container as a specific user and group

Managing container volumes

docker run -v <host_path>:<container_path> <image>: Bind mount a host path to a container path
docker run -v <host_path>:<container_path>:ro <image>: Bind mount a host path to a container path in read-only mode
docker run -v <container_path> <image>: Create a data volume in a container
docker run --mount type=volume,src=<volume_name>,dst=<container_path> <image>: Use a named volume in a container

Managing container networks

docker run --network <network> <image>: Connect a container to a network
docker run --network <network> --ip <ip_address> <image>: Connect a container to a network and specify its IP address
docker network create <network>: Create a new network
docker network rm <network>: Remove a network

Managing container ports

docker run -p <host_port>:<container_port> <image>: Publish a container port to the host
docker port <container_id>: View the port mappings for a container

Managing container security

docker run --security-opt=<option> <image>: Set a security option for a container

Managing container health

docker run --health-cmd=<command> <image>: Set a command to be used to check the health of a container

Managing container capabilities

docker run --cap-add=<capability> <image>: Add a capability to a container
docker run --cap-drop=<capability> <image>: Drop a capability from a container

Managing container isolation

docker run --isolation=<isolation> <image>: Set the isolation level for a container

Managing container storage

docker run --storage-opt=<option> <image>: Set a storage option for a container

Managing container labels

docker run --label <key>=<value> <image>: Add a label to a container

Managing container UTS namespace

docker run --uts=<uts> <image>: Set the UTS namespace mode for a container

Managing a Swarm

docker swarm init: Initialize a Swarm
docker swarm join: Join a Swarm as a worker
docker swarm join-token worker: View the command to join a Swarm as a worker
docker swarm leave: Leave a Swarm

Managing Swarm services

docker service create <image>: Create a new service
docker service inspect <service_id>: Inspect a service
docker service logs <service_id>: View logs for a service
docker service ls: List all services
docker service tasks <service_id>: List tasks of a service
docker service rm <service_id>: Remove a service
docker service rollback <service_id>: Roll back a service
docker service scale <service_id>=<replicas>: Scale a service
docker service update <service_id> <options>: Update the configuration of a service

Managing Swarm nodes

docker node demote <node_id>: Demote a manager node
docker node inspect <node_id>: Inspect a node
docker node ls: List all nodes
docker node promote <node_id>: Promote a worker node
docker node update <node_id> <options>: Update the configuration of a node

Managing Compose projects

docker-compose up: Start and recreate containers
docker-compose up -d: Start containers in detached mode
docker-compose up --no-recreate: Start containers without recreating them
docker-compose up --force-recreate: Recreate containers before starting them
docker-compose down: Stop and remove containers
docker-compose stop: Stop containers
docker-compose start: Start stopped containers
docker-compose restart: Restart running containers
docker-compose build: Build images before starting containers
docker-compose pull: Pull images before starting containers

Managing Compose services

docker-compose run <service> <command>: Run a command in a new container
docker-compose exec <service> <command>: Run a command in an existing container
docker-compose up --no-deps <service>: Start a service without starting linked services

Managing Compose configuration

docker-compose config: Validate and view the Compose file
docker-compose config > <file>: Generate a Compose file in the specified format

Managing Compose environments

docker-compose -f <file> <command>: Use the specified Compose file for the command
docker-compose --env-file <file> <command>: Load environment variables from the specified file for the command
docker-compose --project-name <name> <command>: Set the project name for the command

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