pip3 install without sudo in a venv virtual environment fails with "Failed to establish a new connection: [Errno -2] Name or service not known

Question

I am trying to install flask with pip3 in a virtual environment and it fails when I run

(VirtEnv) $ pip3 install flask

With:

Collecting flask
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f870ae3bc18>: Failed to establish a new connection: [Errno -2] Name or service not known',)': /simple/flask/
Could not find a version that satisfies the requirement flask (from versions: )
No matching distribution found for flask

However when I run with sudo, the command succeeds but I've read this will install the file outside the virtual environment when using sudo. Running outside the virtual environment also succeeds.

@CristiFati yes, I was shortening to fit in the title. Should that tell me the solution? — user5389726598465, Jun 15 '18 at 01:38
@PuffinGDI The DNS was resolved wrongly within a virtual environment using a local dns server. — user5389726598465, Jun 15 '18 at 02:02

user5389726598465 · Answer 1 · 2018-06-15T02:32:19.477

0

Previously for another project, I had set up a local DNS and had changed my dns settings to use a local DNS server 192.168. and my local gateway as the dns. I could access flask from my computer but something about the virtual environment didn't work until I set the DNS servers to google 8.8.8.8. See here for instructions.

edited Jun 15 '18 at 02:32

answered Jun 15 '18 at 02:03

user5389726598465

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pip3 install without sudo in a venv virtual environment fails with "Failed to establish a new connection: [Errno -2] Name or service not known

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