PM2 Ecosystem config example

ecosystem.config.js

// ============== PM2 ECOSYSTEM FILE =================
// /srv/www/pm2/ecosystem.config.js

// shared environment variables
const commonEnv = {
  devEnv: {},
  prodEnv: {
    SHARED_SECRET: '123456',
    ANOTHER_SHARED_SECRET: '123456',
    NODE_ENV: 'PROD',
  },
};
// individual variables live in app's .env files
// NODE npm start script loading individual .env files: "start": " nodemon --exec babel-node -r dotenv/config app.js",

module.exports = {
  apps: [
    {
      name: 'APP-NAME',     // will be used to refer to app in pm2 commands.
                            // it's convenient if it's the same as nginx location and folder name but not necessary
      cwd: '/path/to/app',  // I prefer absolute paths for clarity but this can be a relative path
      script: 'npm',
      args: 'start',
      log_date_format: 'YYYY-MM-DD HH:mm Z',
      env: {
        PORT: 1234,
        ...commonEnv.prod,
      },
    },
    {
      name: 'ANOTHER-APP',
      cwd: '/path/to/app',
      script: 'npm',
      args: 'start',
      env: {
        ...commonEnv.prod,
      },
    },
  ],
};

// pm2 commands:
// $ pm2 ecosystem // generate sample file
// $ pm2 start/reload/restart/stop app-name 
// $ pm2 logs app-name --lines 5000 
// $ pm2 start ecosystem.config.js


// ============== ECOSYSTEM END =================