stoy 0.0.16

Jupyter Server auto stop

stoy

Application for shutting down kernels in Jupyter Lab after they were idle for a specified period of time. The jupyter instance itself is terminated when no kernels were open for some time.

Usage

Add the following to on_start.sh script of your Sagemaker instance:

pip3 install stoy
export TOKEN=`generate-token`
echo -e '\nc.NotebookApp.token="'$TOKEN'"\n' >> /home/ec2-user/.jupyter/jupyter_notebook_config.py 
stoy --kernel-idle=3600 --server-idle=1800 --token=$TOKEN --url="https://localhost:8443" --log="/var/log" &

generate-token is a script installed with stoy that uses uuid.uuid4 to generate a unique token. The token is saved in an environment variable. The echo command adds the token to Jupyter notebook configuration file. Finally, stoy is started as a background script and the token is passed to it.

Troubleshooting

The application saves logs in stoy.log located in the directory specified by the --log argument. The default location is ~/.stoy/stoy.log.
To access the logs open jupyter lab terminal and run tail, for example:

tail -f /var/log/stoy.log

or

tail -f ~/.stoy/stoy.log

Use Control-C to stop watching the logs.