Docker 🐋 quick guide

Posted on 18 Oct, 2020

Remove docker image.
bash
```
docker rmi <img-id>
```
Remove docker container.
bash
```
docker rm <container-id>
```

Build a docker image with a name.

bash

docker build -f <dockerfile-path> -t name .

Run a container.
bash
```
docker run -p 3000:3000 <container-id>
```
Stop a container.
bash
```
docker stop <container-id>
```
Run a container in detach mode (run in background).
bash
```
docker run -d <container-id>
```
For the love of God always add a -d while running a container. Speaking this from experience.
If you don't run in detach mode, you won't be able to Ctrl+C (or exit), instead use Ctrl+PC (yes the P key and C key).
List docker volumes.
bash
```
docker volume ls
```
Remove docker volume.
bash
```
docker volume rm <volume-name>
```
Check port mapping.
bash
```
docker port <name>
```
Starting a docker container
bash
```
docker start <container>
```
The first two letters of CONTAINER_ID can be provided as an argument too.

Run a command inside container.

bash

docker container exec <CONTAINER> ls -la

Check history of an image.
bash
```
docker history <IMAGE>
```

Connect to local port inside container.

bash

docker run -d --network=host --add-host=host.docker.internal:127.0.0.1

Docker Compose

Tip: Alias docker-compose to an alias like dc to make your life better

Build and run containers.
bash
```
docker-compose up --build
```
Start compose in detached mode
bash
```
docker-compose up -d
```
Stop containers.
bash
```
docker-compose stop
```

Check logs/console messages.

bash

docker-compose logs <image name>
# or better use docker
docker logs -f <image name>

To clear log output, use cmd + k, or ctrl + k

List all containers.
bash
```
docker-compose ps
```

Docker Quick Steals

Run a postgres container.

bash

docker run --name postgres --rm -p 5438:5432 -e POSTGRES_PASSWORD=pass -e POSTGRES_DB=test -d postgres

Get psql using

docker container exec -it postgres psql -U postgres -d test