uv pip install error: No such host is known. (os error 11001)

[contang0]

I am trying to use uv in a corporate environment and unfortunately packages fail to install. I get the following error:

error: error sending request for url (https://pypi.org/simple/networkx/): error trying to connect: dns error: No such host is known. (os error 11001)
  Caused by: error trying to connect: dns error: No such host is known. (os error 11001)
  Caused by: dns error: No such host is known. (os error 11001)

• The command you invoked (e.g., uv pip sync requirements.txt), ideally including the --verbose flag.

uv pip install networkx

• The current uv platform.

Windows 11

• The current uv version (uv --version).

uv 0.1.11 (32e5cac 2024-02-26)

[konstin]

Do you know some details about your proxy setup?

[contang0]

Hardly.. we're a big organisation. I know that we're using certificates to bypass a proxy, but not much more.

[samypr100]

I know that we're using certificates to bypass a proxy

What's you pip.conf file like?

Do you configure a custom CA certificate like pip config set global.cert /path/to/your/ca-bundle.crt
or do you set some environment variables like REQUESTS_CA_BUNDLE or anything like described in https://pip.pypa.io/en/stable/topics/https-certificates/#using-a-specific-certificate-store

[samypr100]

@konstin we can probably add support to allow users to specify their own CA bundles for uv-client like pip allows?

Maybe UV_CERT or UV_CA_BUNDLE to be similar to of PIP_CERT? Which would mean it reads it in and adds it to the reqwest client.

Also worth considering supporting pip.conf eventually.

[zanieb]

You can use SSL_CERT_FILE since we're using rustls-native-certs

There's a pip.conf issue at #1404

[contang0]

I had a look at my pip.ini (which is, I believe, the Windows alternative of pip.conf). It actually doesn't have any configuration for certs, just URLs to our Artifactory server that I think hosts a copy of pypi. We use our own copy for security reasons.

So I believe I would need a way to point uv to our local artifactory server rather than looking up pypi.

[global]
# pypi-remote is a local mirror of https://files.pythonhosted.org
index-url = https://artifactory.url/api/pypi/pypi-remote/simple
# pypi-local is a repository for packages developed at our organisation
extra-index-url = https:///artifactory.url/artifactory/api/pypi/pypi-local/simple

[search]
index = https://artifactory.url/artifactory/api/pypi/pypi-remote/

[zanieb]

You can set the UV_INDEX_URL and UV_EXTRA_INDEX_URL environment variables or use the corresponding CLI flags.

[charliermarsh]

Gonna tentatively close this out, since the thread suggests this is solved by the env vars.