Note about correct python version in ray kubernetes doc

Ray Clusters Kubernetes
1

Hello,

I have been playing with helm. my conda env has python 3.6 but the server expects 3.7, can this be added as a note to the documentation so that the below error can be mitigated?

python ray/doc/kubernetes/example_scripts/run_local_example.py
Traceback (most recent call last):
File “ray/doc/kubernetes/example_scripts/run_local_example.py”, line 57, in
ray.util.connect(f"127.0.0.1:{LOCAL_PORT}")
File “/home/asmalvan/anaconda3/envs/ray/lib/python3.6/site-packages/ray/util/client_connect.py”, line 36, in connect
ignore_version=ignore_version)
File “/home/asmalvan/anaconda3/envs/ray/lib/python3.6/site-packages/ray/util/client/init.py”, line 79, in connect
self._check_versions(conn_info, ignore_version)
File “/home/asmalvan/anaconda3/envs/ray/lib/python3.6/site-packages/ray/util/client/init.py”, line 108, in _check_versions
raise RuntimeError(msg)
RuntimeError: Python minor versions differ between client and server: client is 3.6.13, server is 3.7.7

2

FYI I am using ray1.4.0 branch

3

Matching python versions is a difficult point.
I think it’s covered in the docs
https://docs.ray.io/en/master/cluster/kubernetes.html#running-ray-programs-with-ray-client
https://docs.ray.io/en/master/cluster/ray-client.html#versioning-requirements
but we should probably be louder about it e.g. by putting the warnings upfront rather than after the instructions.