How to get a Docker container's IP address from the host

Question

Is there a command I can run to get the container\'s IP address right from the host after a new container is created?

Basically, once Docker creates the container, I

Answer 1

Based on some of the answers I loved, I decided to merge them to a function to get all the IP addresses and another for an specific container. They are now in my .bashrc file.

docker-ips() {
    docker inspect --format='{{.Name}} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aq)
}

docker-ip() {
  docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$@"
}

The first command gives the IP address of all the containers and the second a specific container's IP address.

docker-ips
docker-ip YOUR_CONTAINER_ID

Answer 2

Just for completeness:

I really like the --format option, but at first I wasn't aware of it so I used a simple Python one-liner to get the same result:

docker inspect <CONTAINER> |python -c 'import json,sys;obj=json.load(sys.stdin);print obj[0]["NetworkSettings"]["IPAddress"]'

Answer 3

To get all container names and their IP addresses in just one single command.

docker inspect -f '{{.Name}} - {{.NetworkSettings.IPAddress }}' $(docker ps -aq)

If you are using docker-compose the command will be this:

docker inspect -f '{{.Name}} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aq)

The output will be:

/containerA - 172.17.0.4
/containerB - 172.17.0.3
/containerC - 172.17.0.2

Answer 4

In Docker 1.3+, you can also check it using:

Enter the running Docker (Linux):

docker exec [container-id or container-name] cat /etc/hosts
172.17.0.26 d8bc98fa4088
127.0.0.1   localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.17 mysql

For windows:

docker exec [container-id or container-name] ipconfig

Answer 5

Combining previous answers with finding the container ID based on the Docker image name:

docker inspect --format '{{ .NetworkSettings.IPAddress }}' `docker ps | grep $IMAGE_NAME | sed 's/\|/ /' | awk '{print $1}'`

Answer 6

You can use docker inspect <container id>.

For example:

CID=$(docker run -d -p 4321 base nc -lk 4321);
docker inspect $CID