PM2 Config with Multiple Processes

Question

I am trying to configure a PM2 config file to start two services when its starts. I want to start React on port 80 ad Node api server on 8080. When it runs the API runs on 80 and nothing runs on 8080. What am I missing in my file. I used the default create react setup to create my React structure and I'm not sure what file the script should point to. Here is the file I created:

 module.exports = { apps : [ { name: 'REACTJS', script: 'client/src/index.js', args: "port=80 sitename='React.js Website'", instances: 0, autorestart: true, watch: true, max_memory_restart: '1G', env: { NODE_ENV: 'development' }, env_production: { NODE_ENV: 'production' } }, { name: 'NODEJS', script: 'server/node.js', args: "port=8080 sitename='Node.js API Server'", // Options reference: https://pm2.io/doc/en/runtime/reference/ecosystem-file/ instances: 0, autorestart: true, watch: true, exec_mode: 'cluster' } ] }; 

Answer 1

in your config, you can pass PORT as well may be you can pass in args or you can pass in ENV [recomended] , and for that, in your node application, where you are doing something like this: app.listen(<PORT>) . make sure, you are taking PORT from ENV , like this : process.env.PORT

in this case your config should look like this:

//process.js

module.exports={
  apps : [
    {
      name: 'REACTJS',
      script: 'client/src/index.js',
      instances: 1, 
      autorestart: true,
      watch: true,
      max_memory_restart: '1G',
      env: {
        NODE_ENV: 'development',
        port:80,
        sitename:'React.js Website'
      },
      env_production: {
        NODE_ENV: 'production',
        port:80,
        sitename:'React.js Website'
      }
    },
    {
      name: 'NODEJS',
      script: 'server/node.js',
      instances: 1,
      autorestart: true,
      watch: true,
      exec_mode: 'cluster',
      env: {
        NODE_ENV: 'development',
        PORT:8080,
        //... all you ENV vars goes here for development mode
      },
      env_production: {
        NODE_ENV: 'production',
        PORT:8080,
         //... all you ENV vars goes here for production mode
      }
  }
]
};

To run,

DEV: pm2 start process.js //by default it considers development mode

PROD: pm2 start process.js --env production

NOTE: Make sure, in your node app you are taking PORT from env, (eg process.env.PORT )

once again,in your react app, that is client/src/index.js , please check wheather you are taking port number like this process.env.port or processs.env.PORT and change in the pm2 config accordingly.