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

Use:

docker inspect $CID | grep IPAddress | grep -v null| cut -d '"' -f 4 | head -1

Answer 2

Docker is written in Go and it uses Go syntax for query purposes too.

To inspect the IP address of a particular container, you need to run the command (-f for "format"):

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

For the container ID or name, you can run the command

docker container ls

which will list every running container.

Answer 3

First get the container ID:

docker ps

(First column is for container ID)

Use the container ID to run:

docker inspect <container ID>

At the bottom,under "NetworkSettings", you can find "IPAddress"

Or Just do:

docker inspect <container id> | grep "IPAddress"

Answer 4

Show all container's IP addresses:

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

Answer 5

The accepted answer does not work well with multiple networks per container:

> docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' cc54d96d63ea

172.20.0.4172.18.0.5

The next best answer is closer:

> docker inspect cc54d96d63ea | grep "IPAddress"

"SecondaryIPAddresses": null,
"IPAddress": "",
    "IPAddress": "172.20.0.4",
    "IPAddress": "172.18.0.5",

I like to use jq to parse the network JSON:

> docker inspect cc54d96d63ea | jq -r 'map(.NetworkSettings.Networks) []'

{
  "proxy": {
    "IPAMConfig": null,
    "Links": [
      "server1_php_1:php",
      "server1_php_1:php_1",
      "server1_php_1:server1_php_1"
    ],
    "Aliases": [
      "cc54d96d63ea",
      "web"
    ],
    "NetworkID": "7779959d7383e9cef09c970c38c24a1a6ff44695178d314e3cb646bfa30d9935",
    "EndpointID": "4ac2c26113bf10715048579dd77304008904186d9679cdbc8fcea65eee0bf13b",
    "Gateway": "172.20.0.1",
    "IPAddress": "172.20.0.4",
    "IPPrefixLen": 24,
    "IPv6Gateway": "",
    "GlobalIPv6Address": "",
    "GlobalIPv6PrefixLen": 0,
    "MacAddress": "02:42:ac:14:00:04",
    "DriverOpts": null
  },
  "webservers": {
    "IPAMConfig": null,
    "Links": [
      "server1_php_1:php",
      "server1_php_1:php_1",
      "server1_php_1:server1_php_1"
    ],
    "Aliases": [
      "cc54d96d63ea",
      "web"
    ],
    "NetworkID": "907a7fba8816cd0ad89b7f5603bbc91122a2dd99902b504be6af16427c11a0a6",
    "EndpointID": "7febabe380d040b96b4e795417ba0954a103ac3fd37e9f6110189d9de92fbdae",
    "Gateway": "172.18.0.1",
    "IPAddress": "172.18.0.5",
    "IPPrefixLen": 24,
    "IPv6Gateway": "",
    "GlobalIPv6Address": "",
    "GlobalIPv6PrefixLen": 0,
    "MacAddress": "02:42:ac:12:00:05",
    "DriverOpts": null
  }
}

To list the IP addresses of every container then becomes:

for s in `docker ps -q`; do
  echo `docker inspect -f "{{.Name}}" ${s}`:
  docker inspect ${s} | jq -r 'map(.NetworkSettings.Networks) []' | grep "IPAddress";
done

/server1_web_1:
    "IPAddress": "172.20.0.4",
    "IPAddress": "172.18.0.5",
/server1_php_1:
    "IPAddress": "172.20.0.3",
    "IPAddress": "172.18.0.4",
/docker-gen:
    "IPAddress": "172.18.0.3",
/nginx-proxy:
    "IPAddress": "172.20.0.2",
    "IPAddress": "172.18.0.2",

Answer 6

Reference containers by name:

docker run ... --name pg-master

Then grab the IP address address by name:

MASTER_HOST=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' pg-master)