This Python package allows entering Linux kernel namespaces (mount, IPC, net, PID, user and UTS) by doing the "setns" syscall. The command line interface tries to be similar to the nsenter C program.

Requires Python 2.6 or higher

See the introductory blog post "Entering Kernel Namespaces from Python".

Install from PyPI:

sudo pip3 install nsenter

Install from git source:

python3 setup.py install

Example command line usage:

docker run -d --name=redis -t redis
sudo nsenter --all --target=`docker inspect --format '{{ .State.Pid }}' redis` /bin/bash

Example usage from Python:

import subprocess
from nsenter import Namespace

with Namespace(mypid, 'net'):
    # output network interfaces as seen from within the mypid's net NS:
    subprocess.check_output(['ip', 'a'])