Docker

List docker images

docker images/docker image ls

List running/stopped containers

• docker ps

• docker ps -a

Create and run container.

docker run -d —rm —name <container-name> -p <host port:container port> <image>

Step into running container terminal

docker exec -it <container> sh

How to delete image/running container

• docker rm -f <container> // stop and remove

• docker rmi <img>

The command that builds custom image from Dockerfile

docker build <path-to-Dockerfile-directory> -t <name:tag>

Create a Dockerfile with the postgres image, add persistence to data.

FROM postgres

WORKDIR app

COPY ./init.sql .

# Set environment variables

ENV POSTGRES_DB=app

ENV POSTGRES_USER=appuser

ENV POSTGRES_PASSWORD=apppassword

# Expose default Postgres port

EXPOSE 5432

VOLUME /var/lib/postgresql/data

CMD [“postgres“]