Starting Pm2 in auto cluster mode

[shaunakv1]

Hello,

I am using the v8.9.4 node image. I am trying to figure out how to get pm2 to start in built-in cluster mode. If I scale up my app service plan I can actually have more CPU. I want to get pm2 to spin up more clusters. this command pm2 start app.js -i max auto detects the number of CPUs and spins up right number of node instances.

This should in theory be transparent to the web app. I tried to spin up the cluster manually by running that command straight in console, and they spin up alright. Also use up CPU much better.

How can I use the current container to start my application using pm2 in cluster mode?

Thanks!

[tony-gutierrez]

You need to set the nodeProcessCountPerApplication to 0 in iisnode.yml in your root.
https://github.com/tjanczuk/iisnode/blob/master/src/samples/configuration/iisnode.yml

[shaunakv1]

I am not using the windows azure web app. I use the nodejs container which does not use IIS.

[tony-gutierrez]

Hmm, theres probably somewhere where you can relay config flags to PM2, but I am not familiar with it. Perhaps you can configure this in the process.json file?

#10

http://pm2.keymetrics.io/docs/usage/application-declaration/#process-file

[techno246]

It appears that if you set your startup file to process.json, it will start PM2 in cluster. You can then set the number of instances in process.json.

{
  "name": "worker",
  "script": "./server.js",
  "instances": 4,
  "merge_logs": true,
  "log_date_format": "YYYY-MM-DD HH:mm Z",
  "watch": true,
  "watch_options": {
    "followSymlinks": true,
    "usePolling": true,
    "interval": 5
  }
}

Logs here https://gist.github.com/techno246/fbe2de3b3521464b549d3498e2b0ac03 (same one I posted in issue #47 )