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docker network ls

Learn to list networks with docker network ls.

docker network ls

Docker creates three networks with the installation: bridge, host and none. docker network ls lists them and the ones you created:

$ docker network ls
NETWORK ID     NAME            DRIVER    SCOPE
1a2b3c4d5e6f   bridge          bridge    local
2b3c4d5e6f70   host            host      local
3c4d5e6f7081   none            null      local
4d5e6f708192   proje_default   bridge    local

Inspecting a network

docker network inspect shows the network's subnet, gateway and connected containers with their IP addresses:

$ docker network inspect -f '{{range .IPAM.Config}}{{.Subnet}}{{end}}' bridge
172.17.0.0/16
$ docker network inspect -f '{{range .Containers}}{{.Name}} {{.IPv4Address}}{{"\n"}}{{end}}' proje_default
proje-db-1 172.18.0.2/16
proje-api-1 172.18.0.3/16

Practice Explore the networks

Write two commands: list only the networks with the bridge driver (--filter driver=bridge); then print the subnet of the bridge network with the {{range .IPAM.Config}}{{.Subnet}}{{end}} template.

Starter code

terminal
# buraya yaz

Sample solution

terminal
docker network ls --filter driver=bridge
docker network inspect -f '{{range .IPAM.Config}}{{.Subnet}}{{end}}' bridge

Expected output

NETWORK ID     NAME            DRIVER    SCOPE
1a2b3c4d5e6f   bridge          bridge    local
4d5e6f708192   proje_default   bridge    local
172.17.0.0/16

Questions and answers

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

1 Who created the proje_default network?

  • The Docker installation
  • The operating system
  • Kubernetes
  • Docker Compose, for the project folder Correct answer

Explanation: Compose creates a name_default network for each project.

2 Show the network's details.

Question 
docker network ____ bridge
Answer 
docker network inspect bridge

Explanation: inspect gives the subnet and connected containers.

3 Match.

Term Meaning
network ls List networks
network inspect Details
172.17.0.0/16 Default bridge subnet
SCOPE local Single-host network

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