Opbeans for Node.js

The Opbeans inventory management system is a demo app created and maintained by Elastic.

Technology Stack

This application uses the following technologies:

• Node.js
• Express
• PostgreSQL
• Redis
• React (via opbeans-frontend)
• React Router (via opbeans-frontend)
• Redux (via opbeans-frontend)
• Elastic APM

Configuration

Setup the following environment variables:

• NODE_ENV - The current Node environment (set to production to enable Elastic APM)
• PORT - The port at which to run the Opbeans server (default: 3000)
• PGHOST - PostgreSQL server host
• PGPORT - PostgreSQL server port
• PGUSER - PostgreSQL database username
• PGPASSWORD - PostgreSQL database password
• PGDATABASE - PostgreSQL database name (default: opbeans)
• ELASTIC_APM_SERVICE_NAME - Elastic APM service name for the server app (default: opbeans-node)
• ELASTIC_APM_SERVER_URL - APM Server URL (default: http://localhost:8200)
• ELASTIC_APM_JS_SERVER_URL - Elastic APM Server URL for the client app (default: http://localhost:3000)
• ELASTIC_APM_JS_SERVICE_NAME - Elastic APM App Name for the client app (defaults to name from opbeans-frontend package.json file
• ELASTIC_APM_JS_SERVICE_VERSION - Elastic APM App Name for the client app (defaults to version from opbeans-frontend package.json file

For a complete list of Elastic APM agent environment variables, see the offical documentation

For a complete list of PostgreSQL environment variables see the official documentation.

Bootstrap

Populate the database with tables and basic data:

npm run db-setup

Generate random orders:

node db/generate_orders.js <num>

Where <num> is the amount of orders to create.

Start

npm start

Updating the client

If NODE_ENV isn't production, running npm install will also clone, install and build [opbeats-frontend]. If you ever want to update the opbeans-frontend, just run:

npm run client-update

Testing locally

The simplest way to test this demo is by running:

make test

Tests are written using bats under the tests dir

Publishing to dockerhub locally

Publish the docker image with

VERSION=1.2.3 make publish

NOTE: VERSION refers to the tag for the docker image which will be published in the registry

Demo notes

Trigger error

The app have a built-in bug that you can trigger by navigating to the path /is-it-coffee-time.

Trigger slowness

The app have two npm scripts for adding a new customer:

• customer-add-ok, which will add a new customer
• customer-add-redos, which fail adding a new customer and block the server from processing any other requests in the meantime.

Run either of the two scripts using npm run <name>.

If running inside docker, you can run it using docker compose, e.g:

docker compose exec opbeans-node npm run customer-add-redos

License

MIT

Made with ♥️ and ☕️ by Elastic.