Connecting to local runtime via Google Cloud SDK

[markmorr]

Hi,

I am attempting to connect to a VM instance I started from GCP so that I can take advantage of a GPU in Google Colab. I am following the instructions here. I also attempted solutions from the issues raised here and here but they didn't work--I think my problem is somewhat different. I am using the following commands
First in Google Cloud SDK:
gcloud compute ssh --zone "us-central1-a" [instance_name] --project [project_name] -- -L 8889:locahost:8889
Then, in the instance that starts up:
jupyter serverextension enable --py jupyter_http_over_ws
jupyter notebook --NotebookApp.allow_origin="https://colab.research.google.com" --port=8889 --NotebookApp.port_retries=0 --no-browser

After those, my instance generates the url as expected, but when I paste it into my browser it says 'The site can't be reached.' (Connection reset error).
Any help or suggestions would be greatly appreciated!