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Summary - First container

Combine run, ps, stop and logs to manage a container.

Summary: the first container

In this group:

  • docker run image command: creates a container from an image; the container stops when the main process ends.
  • -d starts it in the background; docker exec runs a command in a running container.
  • docker ps (-a, -q, --filter, --format) lists containers.
  • stop shuts down gracefully, kill kills immediately, rm removes, start starts again.
  • docker logs shows stdout/stderr (-f, --tail, --since).
docker run -d --name web nginx
docker logs -f --tail 10 web
docker stop web && docker rm web

Practice A container's life cycle

Write four commands: start a container named web from nginx in the background; show the last 10 log lines; stop the container; remove the container.

Starter code

terminal
# buraya yaz

Sample solution

terminal
docker run -d --name web nginx
docker logs --tail 10 web
docker stop web
docker rm web

Expected output

7c2f4a9e1b3d
/docker-entrypoint.sh: Configuration complete; ready for start up
web
web

Questions and answers

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

1 Which stops all running containers with one command?

  • docker stop $(docker ps -q) Correct answer
  • docker stop --all-running
  • docker rm -a
  • docker ps --stop

Explanation: docker ps -q gives the IDs; stop takes all of them.

2 Pass the IDs to the command.

Question 
docker rm $(docker ps -a ____)
Answer 
docker rm $(docker ps -a -q)

Explanation: -q prints only the IDs.

3 Match.

Term Meaning
docker run New container
docker exec Command in an existing container
docker logs Output records
docker rm Removal

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