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Python libraries on an air-gapped machine

The Problem

Development and test clusters may be air-gapped so that client data or sensitive software under development is less likely to be leaked. This can cause problems when trying to install libraries, e.g. for Python-based software, especially if the cluster has an old version of a Linux OS installed.

The Solution

Setup Python's pip on the remote machine

  • On an Internet-enabled machine, download the Wheel file for pip from https://pypi.python.org/pypi/pip, such as pip-9.0.1-py2.py3-none-any.whl.
  • Copy the Wheel file (e.g. pip-9.0.1-py2.py3-none-any.whl) to the remote machine, e.g. using scp:
    • scp pip-9.0.1-py2.py3-none-any.whl user@host:/path
  • On the remote machine:
    • python pip-9.0.1-py2.py3-none-any.whl/pip install --no-index pip-9.0.1-py2.py3-none-any.whl
    • pip --version # this should display the version number if correctly installed

Download the required libraries

  • On an Internet-enabled machine, download the library and its dependencies using the following. Note that the air-gapped machine contained Python 2.7.5, so I had to set the version in the pip download.
    • mkdir downloads
    • cd dowloads
    • pip download --python-version 2.7.5 --only-binary=:all: <library>
  • Copy the wheel files over to the remote host, e.g.
    • scp *.whl user@host:/path

Install the libraries on the remote machine

  • On the remote (air-gapped) machine, type:
    • pip install --no-index --find-links="." <library>

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