Docker commands

Commands

Containers

Build a container using a Dockerfile in the current directory.

docker build -t <desired_container_name> .

Run a container in the background using port mapping.

docker run -dp 3000:3000 <container_name>

List containers

docker ps # Running only
docker ps -a # All containers
docker ps -s # Disk usage by container

Stop a container

docker stop <container_id>

Remove a container

docker rm <container_id> # Container id is obtained from "docker ps"

Volumes

Persistant storage (db) that wont be removed if the container is stopped. Create a volume

docker volume create <desired_volume_name>

Run a container with a volume

docker run -dp 3000:3000 -v <volume_name>:/etc/<folder_name> <container_name>

Locations where updates to files can be made without having to rebuild the container. Useful for coding changes locally and having the updates occur in the docker container. Example from: https://docs.docker.com/get-started/06_bind_mounts/

 docker run -dp 3000:3000 \
     -w /app -v "$(pwd):/app" \
     node:12-alpine \
     sh -c "yarn install && yarn run dev"

The -v "$(pwd):/app" controls the current bind directory.

Logs

See log processes:

docker log -f <container_id>

Simple processes

MySQL db

# Create mysql instance
docker run -d \
     --network todo-app --network-alias mysql \
     -v todo-mysql-data:/var/lib/mysql \
     -e MYSQL_ROOT_PASSWORD=<db_password> \
     -e MYSQL_DATABASE=<db_name> \
     mysql:5.7

# Check if working and connect to db
docker exec -it <mysql-container-id> mysql -u root -p

Networking functions

docker run -it --network todo-app nicolaka/netshoot

notes