Errors during model build : Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/prometheus-client/

Version/Environment (if relevant):

4.x, 5.x 

Issue:

When deploying a Model API the build is very slow and the build logs list repeating network related errors like:

Jan 23 2023 18:14:08 +0100 #13 4.807 WARNING: Retrying (Retry(total=9, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x7f081026bd90>: Failed to establish a new connection: [Errno -2] Name or service not known')': /simple/prometheus-client/

The model eventually deploys, but the build process is slow.

Root Cause:

Model API initialization code tries to install the python package prometheus-client 0.11.0 (among others), a client for metrics & monitoring tools.  If your system is air-gapped or public/internet access is tightly controlled your system might not be able to fetch that python package from https://pypi.org, resulting in the error above.

Resolution:

Install prometheus-client in your project's Compute Environment via a dockerfile instruction:

RUN pip install prometheus-client==0.11.0

If this isn't possible another idea is to modify pip's config files to make it not retry and "fail fast", like:
pip config --quiet --user set global.retries 0
pip config --quiet --user set global.timeout 1
pip config --quiet --user set global.disable-pip-version-check True

Notes/Information:

If the above isn't possible please reach out to Domino Technical Support referencing DOM #36045 and DOM #41738