How to get a Docker container's IP address from the host
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 want to roll my own code deployment and container configuration scripts.
The --format option of inspect comes to the rescue.
Modern Docker client syntax is:
docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_name_or_id
Old Docker client syntax is:
docker inspect --format '{{ .NetworkSettings.IPAddress }}' container_name_or_id
These commands will return the Docker container's IP address.
As mentioned in the comments: if you are on Windows, use double quotes " instead of single quotes ' around the curly braces.
You can use docker inspect <container id>.
For example:
CID=$(docker run -d -p 4321 base nc -lk 4321);
docker inspect $CID
docker inspect $CID | grep IPAddress | cut -d '"' -f 4, it works fine :)
alias dockerip='docker ps | tail -n +2 | while read cid b; do echo -n "$cid\t"; docker inspect $cid | grep IPAddress | cut -d \" -f 4; done'
docker inspect -format '{{ .NetworkSettings.IPAddress }}' ${CID}
docker inspect -format '{{ .NetworkSettings.IPAddress }}' ${CID} is the new syntax. -format is deprecated, it becomes --format.
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 for UNIX based:
docker inspect <container id> | grep "IPAddress"
And for Windows CMD:
docker inspect <container id> | findstr "IPAddress"
docker run -it MYCONTAINER /bin/bash), the output of inspect has no section NetworkSettings!
docker network inspect bridge | grep Gateway | grep -o -E '[0-9.]+'
... | grep IP solution to all the formatting details required to get IP. +1
docker run -it MYIMAGE (that isn't a container name); if you do docker inspect MYIMAGE you will get static information about the image. You need to find the name of the running container (or use its id as others suggest). On my system, the first such container created from that image defaults to name MYIMAGE_1, so docker inspect MYIMAGE_1 has NetworkSettings.
docker inspect CONTAINER_ID | grep "IPAddress"
You can add -i to grep for ignoring the case then even the following will work:
docker inspect CONTAINER_ID | grep -i "IPaDDreSS"
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
{{.NetworkSettings.IPAddress }} to {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}
docker inspect --format '{{ .NetworkSettings.IPAddress }}' $(docker ps -aq | xargs) | sed -e '/^$/d'. The sed(1) removes empty lines for containers present, but not having an IP-address.
Add this shell script in your ~/.bashrc or relevant file:
docker-ip() {
docker inspect --format '{{ .NetworkSettings.IPAddress }}' "$@"
}
Then, to get an IP address of a container, simply do this:
docker-ip YOUR_CONTAINER_ID
For the new version of the Docker, please use the following:
docker-ip() {
docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' "$@"
}
Template parsing error: template: :1:19: executing "" at <.NetworkSettings.IPA...>: map has no entry for key "NetworkSettings"
source ~/.bash_profile
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
docker exec [container-name-or-id] ip a
docker exec [container-id or container-name] ipconfig
Show all container's IP addresses:
docker inspect --format='{{.Name}} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $(docker ps -aq)
As of Docker version 1.10.3, build 20f81dd
Unless you told Docker otherwise, Docker always launches your containers in the bridge network. So you can try this command below:
docker network inspect bridge
Which should then return a Containers section which will display the IP address for that running container.
[
{
"Name": "bridge",
"Id": "40561e7d29a08b2eb81fe7b02736f44da6c0daae54ca3486f75bfa81c83507a0",
"Scope": "local",
"Driver": "bridge",
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16"
}
]
},
"Containers": {
"025d191991083e21761eb5a56729f61d7c5612a520269e548d0136e084ecd32a": {
"Name": "drunk_leavitt",
"EndpointID": "9f6f630a1743bd9184f30b37795590f13d87299fe39c8969294c8a353a8c97b3",
"IPv4Address": "172.17.0.2/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
}
}
]
Execute:
docker ps -a
This will display active docker images:
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3b733ae18c1c parzee/database "/usr/lib/postgresql/" 6 minutes ago Up 6 minutes 5432/tcp serene_babbage
Use the CONTAINER ID value:
docker inspect <CONTAINER ID> | grep -w "IPAddress" | awk '{ print $2 }' | head -n 1 | cut -d "," -f1
"172.17.0.2"
My answer:
docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}} %tab% {{.Name}}' $(docker ps -aq
) | sed 's#%tab%#\t#g' | sed 's#/##g' | sort -t . -k 1,1n -k 2,2n -k 3,3n -k 4,4n
Also as a bash alias:
docker-ips() { docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}} %tab% {{.Name}}' $(docker ps -aq) | sed 's#%tab%#\t#g' | sed 's#/##g' | sort -t . -k 1,1n -k 2,2n -k 3,3n -k 4,4n }
Output is sorted by IP address, and tab delimited:
# docker-ips
172.18.0.2 memcached
172.18.0.3 nginx
172.18.0.4 fpm-backup
172.18.0.5 dns
172.18.0.6 fpm-beta
172.18.0.7 exim
172.18.0.8 fpm-delta
172.18.0.9 mariadb
172.18.0.10 fpm-alpha
172.19.0.2 nextcloud-redis
172.19.0.3 nextcloud-db
172.19.0.4 nextcloud
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
Here's a quick working answer:
Get your container name or ID:
docker container ls
Then get the IP:
docker inspect <container_ID Or container_name> |grep 'IPAddress'
Get the port:
docker inspect <container_ID Or container_name> |grep 'Port'
I wrote the following Bash script to get a table of IP addresses from all containers running under docker-compose.
function docker_container_names() {
docker ps -a --format "{{.Names}}" | xargs
}
# Get the IP address of a particular container
dip() {
local network
network='YOUR-NETWORK-HERE'
docker inspect --format "{{ .NetworkSettings.Networks.$network.IPAddress }}" "$@"
}
dipall() {
for container_name in $(docker_container_names);
do
local container_ip=$(dip $container_name)
if [[ -n "$container_ip" ]]; then
echo $(dip $container_name) " $container_name"
fi
done | sort -t . -k 3,3n -k 4,4n
}
You should change the variable network to your own network name.
Docker is written in Go and it uses Go syntax for query purposes too.
To inspect the IP address of a particular container, you need to run the command (-f for "format"):
docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' container_id_or_name
For the container ID or name, you can run the command
docker container ls
which will list every running container.
Reference containers by name:
docker run ... --name pg-master
Then grab the IP address address by name:
MASTER_HOST=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' pg-master)
Here's is a solution that I developed today in Python, using the docker inspect container JSON output as the data source.
I have a lot of containers and infrastructures that I have to inspect, and I need to obtain basic network information from any container, in a fast and pretty manner. That's why I made this script.
IMPORTANT: Since the version 1.9, Docker allows you to create multiple networks and attach them to the containers.
#!/usr/bin/python
import json
import subprocess
import sys
try:
CONTAINER = sys.argv[1]
except Exception as e:
print "\n\tSpecify the container name, please."
print "\t\tEx.: script.py my_container\n"
sys.exit(1)
# Inspecting container via Subprocess
proc = subprocess.Popen(["docker","inspect",CONTAINER],
stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
out = proc.stdout.read()
json_data = json.loads(out)[0]
net_dict = {}
for network in json_data["NetworkSettings"]["Networks"].keys():
net_dict['mac_addr'] = json_data["NetworkSettings"]["Networks"][network]["MacAddress"]
net_dict['ipv4_addr'] = json_data["NetworkSettings"]["Networks"][network]["IPAddress"]
net_dict['ipv4_net'] = json_data["NetworkSettings"]["Networks"][network]["IPPrefixLen"]
net_dict['ipv4_gtw'] = json_data["NetworkSettings"]["Networks"][network]["Gateway"]
net_dict['ipv6_addr'] = json_data["NetworkSettings"]["Networks"][network]["GlobalIPv6Address"]
net_dict['ipv6_net'] = json_data["NetworkSettings"]["Networks"][network]["GlobalIPv6PrefixLen"]
net_dict['ipv6_gtw'] = json_data["NetworkSettings"]["Networks"][network]["IPv6Gateway"]
for item in net_dict:
if net_dict[item] == "" or net_dict[item] == 0:
net_dict[item] = "null"
print "\n[%s]" % network
print "\n{}{:>13} {:>14}".format(net_dict['mac_addr'],"IP/NETWORK","GATEWAY")
print "--------------------------------------------"
print "IPv4 settings:{:>16}/{:<5} {}".format(net_dict['ipv4_addr'],net_dict['ipv4_net'],net_dict['ipv4_gtw'])
print "IPv6 settings:{:>16}/{:<5} {}".format(net_dict['ipv6_addr'],net_dict['ipv6_net'],net_dict['ipv6_gtw'])
The output is:
$ python docker_netinfo.py debian1
[frontend]
02:42:ac:12:00:02 IP/NETWORK GATEWAY
--------------------------------------------
IPv4 settings: 172.18.0.2/16 172.18.0.1
IPv6 settings: null/null null
[backend]
02:42:ac:13:00:02 IP/NETWORK GATEWAY
--------------------------------------------
IPv4 settings: 172.19.0.2/16 172.19.0.1
IPv6 settings: null/null null
I use this simple way
docker exec -it <container id or name> hostname -i
e.g
ubuntu@myhost:~$ docker exec -it 3d618ac670fe hostname -i
10.0.1.5
docker inspect --format '{{ .NetworkSettings.IPAddress }}' <containername or containerID here>
The above works if the container is deployed to the default bridge network.
However, if using a custom bridge network or a overlay network, I found the below to work better:
docker exec <containername or containerID here> /sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'
To extend ko-dos' answer, here's an alias to list all container names and their IP addresses:
alias docker-ips='docker ps | tail -n +2 | while read -a a; do name=${a[$((${#a[@]}-1))]}; echo -ne "$name\t"; docker inspect $name | grep IPAddress | cut -d \" -f 4; done'
docker ps -q to avoid the tail, and --format to avoid the grep. Also you can pass multiple container IDs to docker inspect rather than loop in shell.
docker ps -q only displays the containers' numeric IDs, but I think using their name is better. tail is only to get rid of the first line (table header) & is still needed. I could use --format, though: docker ps | tail -n +2 | while read -a a; do name=${a[$((${#a[@]}-1))]}; echo -ne "$name\t"; docker inspect --format="{{.NetworkSettings.IPAddress}}" $name | cut -d \" -f 4; done. But that doesn't seem like a big improvement... the grep was more readable IMO.
docker inspect $cid | grep IPAddress | cut -d '"' -f 4 | tail -n 1
docker ps | tail -n +2 | while read -a a; do name=${a[$((${#a[@]}-1))]}; echo ${name};docker inspect $name | grep "IPAddress.*[0-9]\+"; done
NOTE!!! for Docker Compose Usage:
Since Docker Compose creates an isolated network for each cluster, the methods below do not work with docker-compose.
The most elegant and easy way is defining a shell function, currently the most-voted answer @WouterD's:
dockip() {
docker inspect --format '{{ .NetworkSettings.IPAddress }}' "$@"
}
Docker can write container IDs to a file like Linux programs:
Running with --cidfile=filename, Docker dumps the ID of the container to "filename".
See "Docker runs PID equivalent Section" for more information.
--cidfile="app.cid": Write the container ID to the file
Using a PID file:
Running container with --cidfile parameter, the app.cid file content is like: a29ac3b9f8aebf66a1ba5989186bd620ea66f1740e9fe6524351e7ace139b909 You can use file content to inspect Docker containers: blog-v4 git:(develop) ✗ docker inspect `cat app.cid` You can extract the container IP using an inline Python script: $ docker inspect `cat app.cid` | python -c "import json;import sys;\ sys.stdout.write(json.load(sys.stdin)[0]['NetworkSettings']['IPAddress'])" 172.17.0.2
Here's a more human friendly form:
#!/usr/bin/env python
# Coding: utf-8
# Save this file like get-docker-ip.py in a folder that in $PATH
# Run it with
# $ docker inspect <CONTAINER ID> | get-docker-ip.py
import json
import sys
sys.stdout.write(json.load(sys.stdin)[0]['NetworkSettings']['IPAddress'])
See "10 alternatives of getting the Docker container IP addresses" for more information.
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}'`
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"]'
For those who came from Google to find a solution for command execution from the terminal (not by a script), "jid", which is an interactive JSON drill-down utility with autocomplete and suggestion, lets you do the same thing with less typing.
docker inspect $CID | jid
Type Tab .Net Tab and you'll see something like:
[Filter]> .[0].NetworkSettings
{
"Bridge": "",
"EndpointID": "b69eb8bd4f11d8b172c82f21ab2e501fe532e4997fc007ed1a997750396355d5",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"HairpinMode": false,
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"LinkLocalIPv6Address": "",
"LinkLocalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"Networks": {
"bridge": {
"Aliases": null,
"EndpointID": "b69eb8bd4f11d8b172c82f21ab2e501fe532e4997fc007ed1a997750396355d5",
"Gateway": "172.17.0.1",
"GlobalIPv6Address": "",
Type .IPA Tab and you'll see something like:
[Filter]> .[0].NetworkSettings.IPAddress
"172.17.0.2"
If you installed Docker using Docker Toolbox, you can use the Kitematic application to get the container IP address:
Select the container Click on Settings Click in Ports tab.
docker inspect does not work when you run docker toolbox. It will report an IP address, but it is not the correct address that your services will use.
To get the IP address and host port of a container:
docker inspect containerId | awk '/IPAddress/ || /HostPort/'
Output:
"HostPort": "4200"
"HostPort": "4200"
"SecondaryIPAddresses": null,
"IPAddress": "172.17.0.2",
"IPAddress": "172.17.0.2",
For windows 10:
docker inspect --format "{{ .NetworkSettings.IPAddress }}" containerId
This will list down all the container IPs on the host:
sudo docker ps -aq | while read line; do sudo docker inspect -f '{{.Name}} - {{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' $line ; done
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 ${s} | jq -r 'map(.NetworkSettings.Networks) []' | grep "IPAddress";
done
/server1_web_1:
"IPAddress": "172.20.0.4",
"IPAddress": "172.18.0.5",
/server1_php_1:
"IPAddress": "172.20.0.3",
"IPAddress": "172.18.0.4",
/docker-gen:
"IPAddress": "172.18.0.3",
/nginx-proxy:
"IPAddress": "172.20.0.2",
"IPAddress": "172.18.0.2",
Docker inspect use to print all container ips and its respective names
docker ps -q | xargs -n 1 docker inspect --format '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}} {{ .Name }}' | sed 's/ \// /'
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<no value>response on a Mac using Fig/Boot2Docker{{ .NetworkSettings.Networks.$network.IPAddress }}. The default appears to be bridge, but under docker-compose this will be a specific name that depends on the name of your app (I think from the --project-name flag, though that's also going to depend on what type of networking config you have set up). I wrote a full answer in an answer here stackoverflow.com/questions/17157721/…docker inspect <container id> and scroll down you will find the container ip-address