Tutorial: Getting started

Getting started

How to install a test/development server

Manually:

  1. Install JS prerequisites: Node.js (12.x LTS), Grunt Client.
  2. Install Redis
  3. Probably already installed but otherwise, install build-essential, curl and git with (sudo) apt-get install build-essential git curl
  4. Install dependencies for Puppeteer (for PDF creation only)
  5. Clone this repository
  6. Create config/config.json. See How To configure.
  7. Install dependencies and build with npm install from the project root
  8. If still required build Internet Explorer 11 scripts with grunt build-ie11. IE11 support will be removed entirely in April 2020.

Using vagrant:

This takes several shortcuts. Do not use for production!

  1. Install Vagrant and VirtualBox
  2. Run vagrant up from project folder and wait until it completes *
  3. Log in to the VM with vagrant ssh and run cd /vagrant && npm start

The app should now be running on localhost:8006. You can test the API in a different console window with: curl --user enketorules: -d "server_url=https://ona.io/enketo&form_id=widgets" http://localhost:8006/api/v2/survey.

* sometimes vagrant up fails for reasons beyond our control - e.g. if external resources are temporarily unavailable. Try running vagrant reload --provision to resolve this.

Using Docker:

  1. Install Docker Compose.
  2. Create a config file at config/config.json specifying at minimum an API key.
  3. (Optional) For HTTPS, copy your SSL certificate and key files to setup/docker/secrets/ssl.crt and setup/docker/secrets/ssl.key respectively (take care not to commit these files back to any public git repository). Plain HTTP requests to Enketo Express will be automatically redirected to HTTPS.
  4. Execute docker-compose up -d from the setup/docker directory and wait to see e.g. Worker 1 ready for duty....
  5. To stop, execute docker-compose stop from the setup/docker directory. Database dumps from the main Redis instance will be mapped into the directory setup/docker/redis_main_data/.

The app should now be running on localhost.

How to install a production server

See this tutorial for detailed instructions. Another option, for some people, is Deployment on Heroku.

How to configure

All configuration is normally done in config/config.json. This file only has to contain the default properties that you'd like to override. For some it may be preferable to include all properties, to avoid surprises when the default configuration changes. Others may want to reduce hassle and keep the config.json as small as possible to automatically deploy configuration changes (e.g. new widgets). After editing the configuration, the app will need to be restarted.

As an alternative, there is an option to use environment variables instead of a config/config.json file. If the config/config.json file is missing Enketo will assume configuration is done with environment variables. A combination of both options is not supported. See config/sample.env for more information on equivalent environment variable names.

The default production configuration includes 2 redis instances. You can greatly simplify installation by using 1 redis instance instead (for development usage). To do this set the redis.cache.port to 6379 (same as redis.main.port). To set up 2 instances properly for production, you might find the vagrant setup steps in bootstrap.sh useful.

For development usages, it is helpful to set "linked form and data server" -> "server url" to "", so you can use any OpenRosa server with your local Enketo Express.

If you'd like to run a form server such as KoBoToolbox or ODK Aggregate or ODK Central on a private IP address during development, you need to add that IP address to "ip filtering" -> "allowIPAddressList".

For detailed guidance on each configuration item, see 10-configuration.

To configure your own custom external authentication also see this document.

How to run

Run with npm start from project root.

You can now check that the app is running by going to e.g. http://localhost:8005 (depending on your server and port set in config/config.json or the port forwarding set up in Vagrant (default is 8006))