aws-cloudwatch-chart

A node.js module to draw charts for AWS CloudWatch metrics

Example chart:

Installation:

npm install aws-cloudwatch-chart

Usage:

	var AwsCloudWatchChart = require('aws-cloudwatch-chart');
	var config = require('./config.json');
	var acs = new AwsCloudWatchChart(config);

	acs.getChart().then(function(chart){
		chart.save('image.png').then(function(filename){
			//// filename should be == 'image.png' this is your chart.
		});
	});

or

	acs.getChart().then(function(chart){
		chart.get().then(function(image){
			//// image is png image.
		}
	});

config.json example:

	{
		"metrics": [	/// array of metrics settings
			{
                /// Title of metrics. Will be displayed on chart's legend. Should be unique
				"title": "Server1 Max CPU",
                /// AWS namespace
				/// http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/aws-namespaces.html
				"namespace": "AWS/EC2",
                /// Metric name
				/// http://docs.aws.amazon.com/AmazonCloudWatch/latest/DeveloperGuide/CW_Support_For_AWS.html
				"metricName": "CPUUtilization",		
                /// Statistics values. 'Maximum' and "Average" supported 
				"statisticValues": "Maximum",		
                /// Unit. http://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_GetMetricStatistics.html
                /// 'Percent' and 'Count' currently supported
				"unit": "Percent",					
                /// Chart line color for this metric
				"color": "af9cf4",				
                /// Line thickness in px
				"thickness": 2,					
                /// Dashed or solid
				"dashed": false,				
                /// Any property other that listed above will be added to Dimensions array. It's different for different metrics namespaces
				/// InstanceId. This parameter is for Dimensions array. Different for different metrics namespaces
				/// http://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_Dimension.html  
				"InstanceId": "i-2d55aad0",			
			}
		],
		"aws": {
        	/// AWS IAM accessKeyId
            /// Dpn't forget to allow IAM to access CloudWatch. Not other policies are required. Safe.
			"accessKeyId": "XXXXXXXXXXXXXXXXXX",				
            /// AWS IAM secretAccessKey
			"secretAccessKey": "XXXXXX/XXXXXXXXX/XXXXXXXXXXX/XXXXXXXXX",	
            /// AWS region
			"region": "us-east-1"												
		},
		"timeOffset": 1440,		//// Get statistic for last 1440 minutes
		"timePeriod": 60,		//// Get statistic for each 60 seconds 
		"chartSamples": 20,		//// Data points extrapolated on chart
		"width": 1000,			//// Result image width. Maximum value for width or height is 1,000. Width x height cannot exceed 300,000.
		"height":250 			//// Result image height. Maximum value for width or height is 1,000. Width x height cannot exceed 300,000.
	}

AWS Lambda ready:

Sample AWS Lambda function. Posts CloudWatch Alerts via SNS topic via Lambda function to Slack channel. And draws charts for CPUUtilization and CPUCreditBalance (for T2 instances) metrics.

Source

On GitHub

License

MIT