dashing job for fetching CPU usage and Instance count from AWS. Create an aws-config.json, and update your AutoScalingGroupName here. It assumes a List widget named servers and a Meter widget named cpu in your dashboard. { "accessKeyId": "XXXXXX", "secretAccessKey": "XXXXX", "region": "ap-southeast-1" }

gistfile1.txt

"use strict";

var AWS = require('aws-sdk');
AWS.config.loadFromPath(__dirname + '/../aws-config.json');

var autoscaling = new AWS.AutoScaling();
var cloudwatch = new AWS.CloudWatch();

function goFigure() {
  var e = new Date();
  var d = new Date(Date.now() - 5*60*1000);

  autoscaling.describeAutoScalingInstances({},function(err,data) {
    if (!err) {
      var items = data.AutoScalingInstances.map(function(srv) { 
        return { label: srv.InstanceId, value: srv.HealthStatus };
      });
      send_event('servers', { items: items });
    }
  });

  cloudwatch.getMetricStatistics({ Namespace: 'AWS/EC2' , MetricName: 'CPUUtilization', 
                                   Dimensions: [ { Name: 'AutoScalingGroupName', Value: 'adproxyasgrp' } ],
                                   StartTime:d , EndTime: e, Period: 60, Statistics: [ 'Average','SampleCount' ],
                                 }, function(err,data) {
    var datapoint = data.Datapoints.pop();
    if (err) {
      return console.log(err);
    }
    send_event('cpu',{ value: Math.floor(datapoint.Average), 
                       moreinfo: 'CPU usage at ' + datapoint.Timestamp.toTimeString()  });
  });
}

goFigure();

setInterval(goFigure,60*1000);