--node-args in PM2 while using json config mode - json

Question

I have a question, that's how to pass "--node-args" arguments in PM2 while using json config mode, like this:
pm2 start --node-args="--debug=5858" myPm2Config.json
well, I know I can write the arguments into myPm2Config.json file, but I dont want to do this, because I want to make two startup command as "debug" and "production" mode for launch application, such as "pm2_run" and "pm2_debug", and "pm2_debug" command with --node-args argument and "pm2_run" not, and I dont want to make two "myPm2Config.json" files, because that means if something needs changed, I will need to change two json config files, so, is there any easy way to do it? thanks guys!

Answer 1

I have found the solution! that's use js config instead of json config.
first, I create a pm2.config.js file. (mark: file name must be end with .config.js）
//[pm2.config.js]
let config = {
apps : [{
name : "node_shells",
script : "./bin/www",
log_date_format : "YYYY-MM-DD HH:mm:SS",
log_file : "logs/pm2.log",
error_file : "logs/pm2-err.log",
out_file : "logs/pm2-out.log",
pid_file : "logs/pm2.pid",
watch : true,
ignore_watch : ["logs/*", "node_modules/*", "uploads/*"]
}]
}
let debug_mode = false;
for(let arg of process.argv) {
if(arg == '-debug') {
debug_mode = true;
break;
}
}
if(debug_mode) {
console.log('== launching in debug mode ==');
config.apps[0].node_args = "--debug=5858";
}
else {
console.log('== launching in production mode ==');
config.apps[0].node_args = " "; //*require! or it will always uses latest debug options
}
module.exports = config;
then, create two launch files: "pm2_run" and "pm2_debug".
#[pm2_run]
pm2 start pm2.config.js
#[pm2_debug]
pm2 start pm2.config.js -- -debug
now, it's easy to switch debug mode or production mode!