NodeJS Process Management at Brin.gr

myapp.js

//
// The following snippet must be inserted at the top of your main js file
//

process.title = "myapp";

var PID_FILE  = "/usr/local/var/run/"+process.title+".pid"
,   fs        = require('fs');

fs.writeFileSync(PID_FILE, process.pid+"\n");

process.on("uncaughtException", function(err) {
  console.error("[uncaughtException]", err);
  return process.exit(1);
});

process.on("SIGTERM", function() {
  console.log("SIGTERM (killed by supervisord or another process management tool)");
  return process.exit(0);
});

process.on("SIGINT", function() {
  console.log("SIGINT");
  return process.exit(0);
});

process.on("exit", function() {
  return fs.unlink(PID_FILE);
});

//
// Your code start here
//

setInterval(console.log.bind(console, "i'm aliiive"), 1000);

myapp.monit.conf

with pidfile /usr/local/var/run/myapp.pid
  start program = "/usr/bin/supervisorctl start myapp"
  stop program = "/usr/bin/supervisorctl stop myapp"
  if 10 restarts within 10 cycles
    then timeout

myapp.supervisord.conf

[program:myapp]
command=node myapp.js                   ; the program (relative uses PATH, can take args)
directory=/www/app/                     ; directory to cwd to before exec (def no cwd)
process_name=myapp                      ; process_name expr (default %(program_name)s)
autorestart=true                        ; whether/when to restart (default: unexpected)
startsecs=1                             ; number of secs prog must stay running (def. 1)
stopwaitsecs=10                         ; max num secs to wait b4 SIGKILL (default 10)
stdout_logfile=/var/log/myapp.log       ; stdout log path, NONE for none default AUTO
stderr_logfile=/var/log/myapp.err.log   ; stderr log path, NONE for none default AUTO