production.json

{
  "apps": [
  {

    // name your app will have in PM2
    "name": "open311",

    // path of your app
    "script": "server.js",

    // arguments given to your app when it is launched
    "args": [],

    // arguments given to node when it is launched
    "node_args": [],

    //run in cluster mode
    //see http:https://pm2.keymetrics.io/docs/usage/cluster-mode/
    "exec_mode": "cluster", //fork

    //run as many instances as number of cpus
    "instances": "max", //2

    // fix multiple instance environment config sharing
    // see https://github.com/lorenwest/node-config/issues/244
    // see http:https://pm2.keymetrics.io/docs/usage/environment/#specific-environment-variables
    "instance_var": "INSTANCE_ID",

    //enables the watch feature, defaults to "false". 
    //if true, it will restart your app everytime a file change is detected 
    //on the folder or subfolder of your app.
    "watch": false,

    // env variables which will appear in your app
    "env":
    {
      "NODE_ENV": "production"
    }
  },
  {

    // name your app will have in PM2
    "name": "open311-worker",

    // path of your app
    "script": "worker.js",

    // arguments given to your app when it is launched
    "args": [],

    // arguments given to node when it is launched
    "node_args": [],

    //run in cluster mode
    //see http:https://pm2.keymetrics.io/docs/usage/cluster-mode/
    "exec_mode": "cluster", //fork

    //run as many instances as number of cpus
    "instances": 2, //max

    // fix multiple instance environment config sharing
    // see https://github.com/lorenwest/node-config/issues/244
    // see http:https://pm2.keymetrics.io/docs/usage/environment/#specific-environment-variables
    "instance_var": "INSTANCE_ID",

    //enables the watch feature, defaults to "false". 
    //if true, it will restart your app everytime a file change is detected 
    //on the folder or subfolder of your app.
    "watch": false,

    // env variables which will appear in your app
    "env":
    {
      "NODE_ENV": "production"
    }
  }]
}