===== Docker Network by examples =====

List Networks:

  docker network ls

Create a Bridge Network:

  docker network create my-bridge-network

Run a Container on a Custom Bridge Network:

  docker run -d --name my-container --network my-bridge-network nginx

Inspect Network

  docker network inspect my-bridge-network

Run a Container Using Host Network:

  docker run --network host -d nginx


Create a network with your own subnet:

  docker network create \
    --driver bridge \
    --subnet 10.10.0.0/24 \
    --gateway 10.10.0.1 \
    mynet

List all Containers inside a network

  docker network inspect mynet \
    -f '{{json .Containers}}'


Start Postgres inside your own bridge network and add a container:

<code bash>
docker network create app-net
docker volume create pgdata

docker run -d \
  --name db \
  --network app-net \
  -e POSTGRES_PASSWORD=secret \
  -v pgdata:/var/lib/postgresql/18/docker \
  postgres:18

# local bridge network create a DNS service:
docker run --rm --network app-net alpine nslookup db

docker run -d \
  --name app \
  --network app-net \
  -p 8080:8080 \
  myapp
</code>