Planned lessonJNR-049-L03

Running containers

On This Lesson 4 topics

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

start, inspect, and stop containers.

docker run -d --name db -p 5432:5432 postgres:16 starts a container in the background.
-p host:container maps a port so you can reach the app.
-e NAME=value sets environment variables.
docker ps lists running containers; docker stop, docker rm stop and remove.
Containers are disposable: removing one deletes its internal data unless you use a volume.

Draft outline details

bash

docker run -d --name db -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres:16
docker ps
docker stop db && docker rm db

What does -p 8080:80 do?

Show answer

Maps host port 8080 to container port 80.

Apply this lesson with the module's lab, exercises and quiz.

Marking a lesson complete is optional and you can undo it any time. Your progress stays in this browser.