How to get IP address of running docker container

问题

I am using Docker for Mac. I am running a nodejs based microservice in a Docker container. I want to test node microservice through the browser. How to get IP address of running docker container?

回答1:

If you don't want to map ports from your host to the container you can access directly to the docker range ip for the container. This range is by default only accessed from your host. You can check your container network data doing:

docker inspect <containerNameOrId>

Probably is better to filter:

docker inspect <containerNameOrId> | grep '"IPAddress"' | head -n 1

Usually, the default docker ip range is 172.17.0.0/16. Your host should be 172.17.0.1 and your first container should be 172.17.0.2 if everything is normal and you didn't specify any special network options.

EDIT Another more elegant way using docker features instead of "bash tricking":

docker inspect -f "{{ .NetworkSettings.IPAddress }}" <containerNameOrId>

回答2:

Use --format option to get only the IP address instead whole container info:

sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}' <CONTAINER ID>

回答3:

For modern docker engines use this command :

docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name_or_id

and for older engines use :

docker inspect --format '{{ .NetworkSettings.IPAddress }}' container_name_or_id

回答4:

if you want to obtain it right within the container, you can try

ip a | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b" | grep 172.17

回答5:

You can start your container with the flag -P. This "assigns" a random port to the exposed port of your image.

With docker port <container id> you can see the randomly choosen port. Access is then possible via localhost:port.

回答6:

For my case, below worked on Mac:

I could not access container IPs directly on Mac. I need to use localhost with port forwarding, e.g. if the port is 8000, then http://localhost:8000

See https://docs.docker.com/docker-for-mac/networking/#known-limitations-use-cases-and-workarounds

The original answer was from: https://github.com/docker/for-mac/issues/2670#issuecomment-371249949

回答7:

You can not access the docker's IP from outside of that host machine. If your browser is on another machine better to map the host port to container port by passing -p 8080:8080 to run command.

Passing -p you can map host port to container port and a proxy is set to forward all traffix for said host port to designated container port.

来源：https://stackoverflow.com/questions/43692961/how-to-get-ip-address-of-running-docker-container