Overview

Cube.js is designed to work with different configuration sources. There are two ways you can set configuration options; via a configuration file, commonly known as the cube.js file, and environment variables.

Configuration Precedence

In Cube.js, environment variables take precedence over values specified in cube.js. In production scenarios, it allows changing configuration by simply switching environment variables, which is generally safer, faster and easier than re-deploying the codebase.

Development Mode

Cube.js can be run in an insecure, development mode by setting the CUBEJS_DEV_MODE environment variable to true. Putting Cube.js in development mode does the following:

Disables authentication checks
Enables background refresh for in-memory cache and scheduled pre-aggregations
Allows another log level to be set (trace)
Enables the Playground on http://localhost:4000
Uses memory instead of redis as the default cache/queue engine
Logs incorrect/invalid configuration for externalRefresh /waitForRenew instead of throwing errors

Configuring CORS

The Cube.js REST API supports Cross-Origin Resource Sharing (CORS) for all API requests. By default, the middleware allows requests from any origin (*). To change the allowed domain, you can do the following:

module.exports = {
  http: {
    cors: {
      origin: 'https://myapp.com',
    },
  },
};

Please consult the Configuration Reference for more options.

Migrating from Express to Docker

Since v0.23, Cube.js CLI uses the docker template instead of express as a default for project creation, and it is the recommended route for production. To migrate you should move all Cube.js dependencies in package.json to devDependencies and leave dependencies that you use to configure Cube.js in dependencies.

For example, your existing package.json might look something like:

{
  "name": "cubejs-app",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "dev": "node index.js"
  },
  "dependencies": {
    "@cubejs-backend/postgres-driver": "^0.20.0",
    "@cubejs-backend/server": "^0.20.0",
    "jwk-to-pem": "^2.0.4"
  }
}

It should become:

{
  "name": "cubejs-app",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "dev": "./node_modules/.bin/cubejs-server server"
  },
  "dependencies": {
    "jwk-to-pem": "^2.0.4"
  },
  "devDependencies": {
    "@cubejs-backend/postgres-driver": "^0.23.6",
    "@cubejs-backend/server": "^0.23.7"
  }
}

You should also rename your index.js file to cube.js and replace the CubejsServer.create() call with export of configuration using module.exports.

For an index.js like the following:

const CubejsServer = require('@cubejs-backend/server');
const fs = require('fs');
const jwt = require('jsonwebtoken');
const jwkToPem = require('jwk-to-pem');
const jwks = JSON.parse(fs.readFileSync('jwks.json'));
const _ = require('lodash');

const server = new CubejsServer({
  checkAuth: async (req, auth) => {
    const decoded = jwt.decode(auth, { complete: true });
    const jwk = _.find(jwks.keys, (x) => x.kid === decoded.header.kid);
    const pem = jwkToPem(jwk);
    req.authInfo = jwt.verify(auth, pem);
  },
  contextToAppId: ({ authInfo }) => `APP_${authInfo.userId}`,
  preAggregationsSchema: ({ authInfo }) =>
    'pre_aggregations_${authInfo.userId}',
});

server
  .listen()
  .then(({ version, port }) => {
    console.log(`🚀 Cube.js server (${version}) is listening on ${port}`);
  })
  .catch((e) => {
    console.error('Fatal error during server start: ');
    console.error(e.stack || e);
  });

It should be renamed to cube.js and its' contents should look like:

const fs = require('fs');
const jwt = require('jsonwebtoken');
const jwkToPem = require('jwk-to-pem');
const jwks = JSON.parse(fs.readFileSync('jwks.json'));
const _ = require('lodash');

module.exports = {
  checkAuth: async (req, auth) => {
    const decoded = jwt.decode(auth, { complete: true });
    const jwk = _.find(jwks.keys, (x) => x.kid === decoded.header.kid);
    const pem = jwkToPem(jwk);
    req.authInfo = jwt.verify(auth, pem);
  },
  contextToAppId: ({ authInfo }) => `APP_${authInfo.userId}`,
  preAggregationsSchema: ({ authInfo }) =>
    'pre_aggregations_${authInfo.userId}',
};