How to get IP address of running docker container

Question

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?

Answer 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>

EDIT2 For modern docker engines, now it is this way (thanks to the commenters!):

docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' <containerNameOrId>

Answer 2

使用--format选项仅获取 IP 地址而不是整个容器信息：

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

Answer 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

Answer 4

如果你想在容器内直接获取它，你可以尝试

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

Answer 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 .

Answer 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, eg 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

Answer 7

If you want to view the IP address from within the running container, /etc/hosts file is a great place to look at. Now, to uniquely identify the entry within the hosts file, it is a good practise to run the container with the -h option. Sample commands are given below:

1. Run the container with -h set:

docker run -td -h guju <image name>

2. Log in to the running container and view the /etc/hosts file. It will show an entry like this:

172.17.0.5 guju

Answer 8

this will list all containers' IP addresses

while read ctr;do
    sudo docker inspect --format "$ctr "'{{.Name}}{{ .NetworkSettings.IPAddress }}' $ctr
done < <(docker ps -a --filter status=running --format '{{.ID}}')

Answer 9

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.