Dockerコンテナからホストにアクセスする方法

Problem

Do not know how to go out packet to host machine from a docker container.

bash-4.4# wget http://localhost:9040 --2022-11-02 05:14:45-- http://localhost:9040/ Resolving localhost... 127.0.0.1, ::1 Connecting to localhost|127.0.0.1|:9040... failed: Connection refused. Connecting to localhost|::1|:9040... failed: Address not available. Retrying. --2022-11-02 05:14:46-- (try: 2) ...

Solution

Use domain host.docker.internal.

bash-4.4# wget http://host.docker.internal:9040 --2022-11-02 05:18:29-- http://host.docker.internal:9040/ Resolving host.docker.internal... 192.168.65.2 Connecting to host.docker.internal|192.168.65.2|:9040... connected. HTTP request sent, awaiting response... 403 Forbidden

Or you can show IP of the domain.

bash-4.4# nslookup host.docker.internal nslookup: can't resolve '(null)': Name does not resolve Name: host.docker.internal Address 1: 192.168.65.2

bash-4.4# wget http://192.168.65.2:9040 --2022-11-02 05:21:40-- http://192.168.65.2:9040/ Connecting to 192.168.65.2:9040... connected. HTTP request sent, awaiting response... 200 OK

References

• How to access host port from docker container - Stack Overflow