Summary - docker run

Combine various run flags to run an interactive container.

Summary: docker run

In this group:

-it opens an interactive terminal; Ctrl+P, Ctrl+Q detaches without stopping.
--name gives a unique name; docker rename changes it.
--restart (no, on-failure, always, unless-stopped) provides resilience.
-w, --entrypoint, -u override image settings.
Containers should run as an unprivileged user with USER instead of root.

docker run -d --name api --restart unless-stopped -u 1000:1000 -w /app api:1.0

Exercise A production-like run

Start a container from the api:1.0 image with a single command: in the background, named api, restarting unless stopped by hand, with the user 1000:1000 and the working directory /app.

Test yourself

Which command is best for inspecting the inside of an image?
- docker run --rm -it --entrypoint sh image
- docker logs image
- docker build image
- docker stop image
Show answer

docker run --rm -it --entrypoint sh image — Replacing the entrypoint with a shell starts a shell instead of the application.

Run the container as UID 1000.

docker run --rm ____ 1000:1000 alpine id

Show answer

docker run --rm -u 1000:1000 alpine id

Match.

-it

Interactive
--restart

Restarting
-w

Directory
-u

User

Next lesson: docker images

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