How to pass node v8 args and script args to pm2?

Question

I need to be able to start the app below with pm2 but don't know how to start it with pm2.

node --expose-gc bin/www arg1 arg2 arg3 

I know about --node-args but I think is only for --expose-gc.

Answer 1

After some digging, I've found out that what I was looking for was the double dash on linux.

The normal code,

node --expose-gc bin/www arg1 arg2 arg3 

The same code using pm2

pm2 start bin/www --node-args="--expose-gc" -- arg1 arg2 arg3 

All v8 arguments you have to put inside --node-args and all scrips args to be grabbed from process.argv you have to put after the double dash.

I hope that in the future they implement something link --script-args="arg1 arg2 arg3". Would be very nice for those that isn't a linux expert.

Answer 2

Another way is to create application declaration json file where you specify args key. Look at documentation on PM2 site.

Example of pm2.json file:

{   "apps" : [{     "name"        : "appname",     "script"      : "app.js",     "args"        : ["-s", "123"],     "node_args"   : "--harmony",     "merge_logs"  : true,     "cwd"         : "/this/is/a/path/to/start/script",     "env": {         "NODE_ENV": "production"     }   }] } 

And run it as follows:

$ pm2 start pm2.json