Python on Amazon Linux 2 fails to resolve remote RDS host

Question

I installed Amazon Linux 2 as WSL on my Windows machine. I have a simple Python code to connect AWS RDS, which runs fine on Windows, but fails on Amazon Linux 2, with the following error.

```
Traceback (most recent call last):
  File "src/oracledb/impl/thin/connection.pyx", line 102, in oracledb.thin_impl.ThinConnImpl._connect_with_address
  File "src/oracledb/impl/thin/protocol.pyx", line 150, in oracledb.thin_impl.Protocol._connect_phase_one
  File "src/oracledb/impl/thin/protocol.pyx", line 262, in oracledb.thin_impl.Protocol._connect_tcp
  File "/usr/local/lib/python3.10/socket.py", line 824, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/usr/local/lib/python3.10/socket.py", line 955, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -2] Name or service not known
```
I followed instructions on[ this page](https://www.gcptutorials.com/post/python-3.10-installation-on-amazon-linux-2) to install Python on Amazon Linux 2.

Please advise what might be the cause and what should do to resolve it. Thank you in advance.

Accepted Answer

[This post](https://jamespotz.github.io/blog/how-to-fix-wsl2-and-cisco-vpn) helped me to resolve the issue.

Answer

I think WSL uses a different DNS server than your operating system. It uses a docker network dns server.

Try and update your /etc/resolv.conf to the same name server as your windows machine and see if this resolves the issue

This should be a permanent fix https://dev.to/abhiweb/set-persist-google-dns-server-in-wsl2-notes-4364

Python on Amazon Linux 2 fails to resolve remote RDS host

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