Docker Network

3 types of network:

• container to internet (default)
• container to local host (use host.doc ker.internal as address)
• container to container
  • hardcode: the ip address of another container can be found via docker inspect <container_id>), which can be used in the primary container
  • To allow multiple containers talk to each other, we need a container networks

docker network create my_network     # create a docker interal network
docker run --network my_network ...  # run container with the networ

• create a network shared by multiple containers
• IPs are automatically resolved by using the service name (e.g. mongodb://172.17.0.2:27017 → mongodb://mongodb_container:27017 )
• docker WILL NOT replace the resource, it just detects the outgoing requests and resolves the IP for such requests