Python getting Docker Container Name from the inside of a docker container

Question

I need to get the containers name, from within the running container in python

i could easily get the container id from inside the container in python with

bashCommand = """head -1 /proc/self/cgroup|cut -d/ -f3"""
output = subprocess.check_output(['bash','-c', bashCommand])
print output

now i need the containername

What would you do with this information if you had it? A process in a container has a pretty limited ability to interact with its outside world. — David Maze
– David Maze, Commented Jul 26, 2018 at 17:38
i need to save the containername in a mysqldb to the running script informations — Human Khoo
– Human Khoo, Commented Jul 26, 2018 at 17:40

D. Vinson · Accepted Answer · 2019-06-26 05:01:06Z

2

Just set the Name at runtime like:

docker run --name MYCOOLCONTAINER alpine:latest

Then:

bashCommandName = `echo $NAME`

output = subprocess.check_output(['bash','-c', bashCommandName]) 

print output

edited Jun 26, 2019 at 5:01

answered Jul 27, 2018 at 1:56

D. Vinson

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5 Comments

Danny Over a year ago

This got me on the right track (so thank you!), but for people still struggling, the syntax that worked for me was --name container_name, not NAME="CONTAINERNAME"

Cerin Over a year ago

The container name refers to the name given to it in Docker via the --name parameter, not an environment variable...

jai.maruthi Over a year ago

Can I do this on a windows container? When i try 'hostname' on powershell, I get the container id. But get error for 'name' or $name

D. Vinson Over a year ago

Try $NAME (case sensitive)

Jan Frederik Over a year ago

This doesn't work for me. Docker 20.10.6 on Ubuntu 20.04: Start the container with an interactive shell: docker run -it --rm --name MYCOOLCONTAINER alpine:latest sh. There, I run set to view all environment variables. However none contains MYCOOLCONTAINER.

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