Moninode

Monitor library written for client/server side needs in javascript. Monitorized values:

• os free memory
• load average ( 1, 5 and 15 minutes)
• RSS
• process uptime
• number of callbacks in the Node work queue, like setIntervals, timeouts, http requests etc

Resources:

• Homepage
• Git
• NPM

Setup

npm install moninode

Using moninode

Add it to your worker

var Moninode = require('moninode');
var moninode = new Moninode();

Start collecting OS status

m.start( options )

• options:
  • interval - data collecting interval in miliseconds, defaults to 60000
  • fremem - Minimum Free memory in bytes to trigger alarm
  • rss - Maximum RSS memory used by current process in bytes to trigger alarm
  • handles - Maximum number of callbacks waiting in the Node work queue, this value is taken from process._getActiveHandles()

Stop collecting OS status

m.stop()

Events

• log
  • triggers everytime moninode collects OS status
  • Example:

     	moninode.on("log", function( data)
     	{
     		console.log('[log]' + JSON.stringify(data));
     	})
     ///Outputs:
     /// [log]{"load1":0,"load5":0,"load15":0,"freemem":3772477440,"rss":12623872,"uptime":3}
    

• alarm
  • triggers when any threshold is reach:
  • Example:

     	moninode.on("alarm", function( data)
     	{
     		console.log('[alarm]' + JSON.stringify(data));
     	})
     ///Outputs:
     /// [alarm]{"type":"rss","data":{"load1":0,"load5":0,"load15":0,"freemem":3772289024,"rss":13770752,"uptime":6}}
    

Example

var Moninode = require('moninode');

var m = new Moninode();
m.start({ rss: 13369344, interval : 3000});


m.on("log", function( data)
{
	console.log('[log]' + JSON.stringify(data));
})
m.on("alarm", function( data)
{
	console.log('[alarm]' + JSON.stringify(data));
})

setTimeout(function(){
	m.stop();
},10000)

Change Log

0.0.2

• added handles count, value collected with process._getActiveHandles()

0.0.1

• added events log, alarm
• start