Get the host name from within the docker container from Python program

host name of docker container
docker-compose container hostname
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docker run -v option

As per my application requirement, I need to get the server IP and the server name from the python program. But my application is resides inside the specific docker container on top of the Ubuntu.

I have tried like the below

import os
os.system("hostname")  # to get the hostname
os.system("hostname -i") # to get the host ip 

Output: 2496c9ab2f4a172.*.*.*

But it is giving the host name as a it's residing docker containerid and the host_ip as it's private ip address as above. I need the hostname as it is the server name. But when I type these above commands in the terminal I am able to get result what I want.

You won't be able to get the host system's name this way. To get it, you can either define an environment variable, either in your Dockerfile, or when running your container (-e option). Alternatively, you can mount your host /etc/hostname file into the container, or copy it...

This is an example run command I use to set the environment variable HOSTNAME to the host's hostname within the container:

docker run -it -e "HOSTNAME=$(cat /etc/hostname)" <image> <cmd>

In python you can then run os.environ["HOSTNAME"] to get the hostname. As far as the IP address goes, I use this command to get retrieve it from a running container:

route -n | awk '/UG[ \t]/{print $2}'

You will have to install route to be able to use this command. It is included in the package net-tools. apt-get install net-tools

Get the host name from within the docker container from Python , You won't be able to get the host system's name this way. To get it, you can either define an environment variable, either in your Dockerfile,  Getting the docker name doesn't appear to be trivial: mount the host socket via docker API seems like an over kill. a simple hack I came up with to get Docker name within Container: # Python STD library on Linux/Unix system relied on nsswitch.conf (file, dns) for resolution via import socket.

An alternative might be the following:


NODENAME: '{{.Node.Hostname}}'

This will get you the Hostname of the Node, where the container is running as an environment variable (tested on Docker-Swarm / CoreOs Stable).

Containers, Expose host devices to the container, as a list of strings in the form the container to have read-write access to the host's /dev/sda via a node named /dev/​xvda ContainerError – If the container exits with a non-zero exit code and detach is  The –name parameter names the container and the -p parameter maps the host’s port 5000 to the containers port of 5000. Lastly, the my-python-app refers to the image to run. After it starts, you should be able to browse to the container. Depending on how you are running Docker depends on what the IP address of the application will be.

you can go for something like this:

def determine_docker_host_ip_address():
    cmd = "ip route show"
    import subprocess
    process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
    output, error = process.communicate()
    return str(output).split(' ')[2]

Is there any way to use hostname command in the container? · Issue , Once you have given a container a hostname you cant change it. image is started and the application has a problem with hostnames starting with a number -c 4026532305 net 28 1785 root /usr/bin/python /usr/local/bin/supervisord -c Access to additional Docker run flags (hostname in particular) #297. Docker for Mac / Docker for Windows. As of Docker v18.03+ you can use the host.docker.internal hostname to connect to your Docker host. This could come in handy if you wanted to connect to a database that’s running on your host but isn’t running inside of a container.

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Docker Tutorial: Get Going From Scratch, We stop containers with docker stop <container name> and remove them with docker rm <container Containers don't automatically have access to the host network. First, we'll create a small Python script named # Install Python and Basic Python Tools RUN apt-get install -y python python-dev python-distribute python-pip Application Deployment Given that we are building docker images to deploy Python web applications, we can very all take advantage of docker’s ADD command to copy the application repository, preferably with a REQUIREMENTS file to

docker attach, Attach local standard input, output, and error streams to a running container of the three) to a running container using the container's ID or name. If the container was run with -i and -t , you can detach from a container and leave it running Instead, users should use the docker logs command to get access to the logs. docker stop daemon docker rm <your first container name> docker rm daemon To remove all containers, we can use the following command: docker rm -f $(docker ps -aq) docker rm is the command to remove the container.-f flag (for rm) stops the container if it’s running (i.e., force deletion).-q flag (for ps) is to print only container IDs.