Datasette§

To run the Datasette data exploration tool using Unit:

1. Install Unit with a Python 3.6+ language module.

2. Create a virtual environment to install Datasette’s PIP package:

   $ cd /path/to/app/
   $ python3 --version
         Python 3.Y.Z
   $ python3 -m venv venv
   $ source venv/bin/activate
   $ pip install datasette
   $ deactivate
   

   Warning

   Create your virtual environment with a Python version that matches the language module from Step 1 up to the minor number (3.Y in this example). Also, the app type in Step 5 must resolve to a similarly matching version; Unit doesn’t infer it from the environment.

3. Running Datasette on Unit requires a wrapper to expose the application object as the ASGI callable. Let’s use the following basic version, saving it as /path/to/app/asgi.py:

   import glob
   from datasette.app import Datasette
   
   application = Datasette(glob.glob('*.db')).app()
   

4. Run the following command so Unit can access the application directory:

   # chown -R unit:unit /path/to/app/
   

   Note

   The unit:unit user-group pair is available only with official packages, Docker images, and some third-party repos. Otherwise, account names may differ; run the ps aux | grep unitd command to be sure.

   For further details, including permissions, see the security checklist.

5. Next, prepare the Datasette configuration for Unit (use real values for type, home, and path):

   {
       "listeners": {
           "*:80": {
               "pass": "applications/datasette"
           }
       },
   
       "applications": {
           "datasette": {
               "type": "python 3.Y",
               "path": "/path/to/app/",
               "home": "/path/to/app/venv/",
               "module": "asgi",
               "callable": "app"
           }
       }
   }
   

6. Upload the updated configuration. Assuming the JSON above was added to config.json:

   # curl -X PUT --data-binary @config.json --unix-socket \
          /path/to/control.unit.sock http://localhost/config/
   

   Note

   The control socket path may vary; run unitd -h or see Startup and Shutdown for details.

   After a successful update, Datasette should be available on the listener’s IP address and port: