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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

Practice 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.

Starter code

terminal
# buraya yaz

Expected output

6e7f8a9b0c1d

Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 Which command is best for inspecting the inside of an image?

  • docker run --rm -it --entrypoint sh image Correct answer
  • docker logs image
  • docker build image
  • docker stop image

Explanation: Replacing the entrypoint with a shell starts a shell instead of the application.

2 Run the container as UID 1000.

Question 
docker run --rm ____ 1000:1000 alpine id
Answer 
docker run --rm -u 1000:1000 alpine id

Explanation: -u takes a user or UID:GID.

3 Match.

Term Meaning
-it Interactive
--restart Restarting
-w Directory
-u User

All lessons in Beginner

1 What is Docker?

  1. What is Docker?
  2. Containers and virtual machines
  3. Images and containers
  4. Docker architecture
  5. Use cases
  6. Summary - What is Docker

2 Installation and first commands

  1. Installing Docker
  2. docker version
  3. docker info
  4. The hello-world container
  5. Docker Desktop
  6. Summary - Installation

3 First container

  1. docker run basics
  2. Running in the background
  3. docker ps
  4. docker stop and rm
  5. docker logs
  6. Summary - First container

4 Dockerfile basics

  1. What is a Dockerfile?
  2. The FROM instruction
  3. The RUN instruction
  4. COPY and ADD
  5. CMD and ENTRYPOINT
  6. Summary - Dockerfile

5 Build and images

  1. docker build
  2. Tagging images
  3. Build context
  4. Layers and cache
  5. .dockerignore
  6. Summary - Build

6 docker run options

  1. Interactive mode
  2. Naming containers
  3. Restart policy
  4. Working directory
  5. Switching users
  6. Summary - docker run

7 Image management

  1. docker images
  2. docker rmi
  3. docker pull
  4. docker push
  5. docker tag
  6. Summary - Image management

8 Port mapping

  1. The port concept
  2. The -p flag
  3. Multiple ports
  4. Random ports
  5. IP binding
  6. Summary - Port mapping

9 Volumes and data

  1. Data persistence
  2. Named volumes
  3. The -v flag
  4. Bind mounts
  5. Volume management
  6. Summary - Volumes

10 Environment variables

  1. The -e flag
  2. The ENV instruction
  3. The ARG instruction
  4. env-file
  5. The WORKDIR instruction
  6. Summary - Environment

11 Project: docker-compose

  1. Compose design
  2. Service definition
  3. Database service
  4. Volume and network
  5. Putting it together - compose

12 Docker Hub and registry

  1. What is Docker Hub?
  2. docker login
  3. Searching images
  4. Official images
  5. Private registry
  6. Summary - Registry

13 Network basics

  1. Network drivers
  2. docker network ls
  3. Bridge network
  4. Container connectivity
  5. Publishing ports
  6. Summary - Network

14 Beginner final

  1. Challenge - Dockerfile
  2. Challenge - Build and run
  3. Challenge - Volume
  4. Challenge - Compose
  5. Challenge - Beginner project