Is it possible to bind on another IP than 127.0.0.1 on MacOS?-CodePudding

On MacOS 12, using Docker 20.10, I'm not able to start a container on another IP:

% docker run -p 127.123.2.13:80:80 -d nginx
a9216ae29940f7357b9b4826ecddf041f1805c9ee48ba1336361277fc0dcb524
docker: Error response from daemon: Ports are not available: listen tcp 127.0.17.1:80: bind: can't assign requested address.

Is there any other way?

CodePudding user response：

In order to bind to the ip, other than 0.0.0.0, you need to have an interface in your system with the desired ip. For example, watch docker failing to bind to a non-existent ip of 127.0.0.2:

docker run -p 127.0.0.2:80:80 -d nginx
cc79b1b60c9f5e245b326bbfcc17d4a1f1abe6fad6fd12f9677b66bbee972a12
docker: Error response from daemon: Ports are not available: listen tcp 127.0.0.2:80: bind: can't assign requested address.

Now I create an alias for my existing interface lo0:

sudo ifconfig lo0 alias 127.0.0.2 netmask 0xff000000

and try again:

docker run -p 127.0.0.2:80:80 -d nginx
05223ecb6ae99a25b7423f014b9b95422c621717705ce1c255bea04072c45263

docker ps -a
CONTAINER ID   IMAGE     COMMAND                  CREATED          STATUS         PORTS                  NAMES
cc79b1b60c9f   nginx     "/docker-entrypoint.…"   2 minutes ago    Created                               hardcore_haslett
05223ecb6ae9   nginx     "/docker-entrypoint.…"   2 minutes ago    Up 2 minutes   127.0.0.2:80->80/tcp   pensive_bardeen