Solara server

The solara server enables running ipywidgets based applications without a real Jupyter kernel, allowing multiple "Virtual kernels" to share the same process for better performance and scalability.

Readiness check

To check if the server is ready to accept request, the /readyz endpoint is added, and should return a 200 HTTP status code, e.g.:

$ curl http://localhost:8765/readyz
curl -I localhost:8765

HTTP/1.1 200 OK
...

Production mode

By default, solara runs in development mode. This means, it will:

• Automatically reload your project files by watching files on the filesystemn
• Load debug version of the CSS files and JavaScript files for improved error messages (which leads to larger asset files).

To disabled all of these option, pass the --production flag, or set the environment variable SOLARA_MODE=production.

Telemetry

Solara uses Mixpanel to collect usage of the solara server. We track when a server is started, stopped and a daily report of the number of unique users and connections made. To opt out of mixpanel telemetry, either:

• Set the environmental variable SOLARA_TELEMETRY_MIXPANEL_ENABLE to False.
• Install python-dotenv and put SOLARA_TELEMETRY_MIXPANEL_ENABLE=False in a .env file.
• Run in auto restart mode (e.g. using $ solara run sol.py --auto-restart)