How to get the host IP in a docker container and connect to a service on the host

Question

How to get the host IP in the docker container

For example, the nginx container may use the host's ruby ​​service

Answer 1

The host uses loopback address aliases to solve this problem.

For example: add the alias IP 10.200.10.1 to the host's loopback address, and then use this IP in the container to connect to the host's service.

Configure local loopback address alias under MAC

Answer 2

1. Pass in docker run --env HOST_IP=192.168.0.160 through the environment variable and obtain

through the environment variable $HOST_IP

2. Bind the host when running dockerdocker run --network host，通过ip routeGet