--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Service/Amazon/Ec2/CloudWatch.php Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,357 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category Zend
+ * @package Zend_Service_Amazon
+ * @subpackage Ec2
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id: CloudWatch.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Service_Amazon_Ec2_Abstract
+ */
+require_once 'Zend/Service/Amazon/Ec2/Abstract.php';
+
+/**
+ * An Amazon EC2 interface that allows yout to run, terminate, reboot and describe Amazon
+ * Ec2 Instances.
+ *
+ * @category Zend
+ * @package Zend_Service_Amazon
+ * @subpackage Ec2
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Zend_Service_Amazon_Ec2_CloudWatch extends Zend_Service_Amazon_Ec2_Abstract
+{
+ /**
+ * The HTTP query server
+ */
+ protected $_ec2Endpoint = 'monitoring.amazonaws.com';
+
+ /**
+ * The API version to use
+ */
+ protected $_ec2ApiVersion = '2009-05-15';
+
+ /**
+ * XML Namespace for the CloudWatch Stuff
+ */
+ protected $_xmlNamespace = 'http://monitoring.amazonaws.com/doc/2009-05-15/';
+
+ /**
+ * The following metrics are available from each EC2 instance.
+ *
+ * CPUUtilization: The percentage of allocated EC2 compute units that are
+ * currently in use on the instance. This metric identifies the processing
+ * power required to run an application upon a selected instance.
+ *
+ * NetworkIn: The number of bytes received on all network interfaces by
+ * the instance. This metric identifies the volume of incoming network
+ * traffic to an application on a single instance.
+ *
+ * NetworkOut: The number of bytes sent out on all network interfaces
+ * by the instance. This metric identifies the volume of outgoing network
+ * traffic to an application on a single instance.
+ *
+ * DiskWriteOps: Completed write operations to all hard disks available to
+ * the instance. This metric identifies the rate at which an application
+ * writes to a hard disk. This can be used to determine the speed in which
+ * an application saves data to a hard disk.
+ *
+ * DiskReadBytes: Bytes read from all disks available to the instance. This
+ * metric is used to determine the volume of the data the application reads
+ * from the hard disk of the instance. This can be used to determine the
+ * speed of the application for the customer.
+ *
+ * DiskReadOps: Completed read operations from all disks available to the
+ * instances. This metric identifies the rate at which an application reads
+ * a disk. This can be used to determine the speed in which an application
+ * reads data from a hard disk.
+ *
+ * DiskWriteBytes: Bytes written to all disks available to the instance. This
+ * metric is used to determine the volume of the data the application writes
+ * onto the hard disk of the instance. This can be used to determine the speed
+ * of the application for the customer.
+ *
+ * Latency: Time taken between a request and the corresponding response as seen
+ * by the load balancer.
+ *
+ * RequestCount: The number of requests processed by the LoadBalancer.
+ *
+ * HealthyHostCount: The number of healthy instances. Both Load Balancing dimensions,
+ * LoadBalancerName and AvailabilityZone, should be specified when retreiving
+ * HealthyHostCount.
+ *
+ * UnHealthyHostCount: The number of unhealthy instances. Both Load Balancing dimensions,
+ * LoadBalancerName and AvailabilityZone, should be specified when retreiving
+ * UnHealthyHostCount.
+ *
+ * Amazon CloudWatch data for a new EC2 instance becomes available typically
+ * within one minute of the end of the first aggregation period for the new
+ * instance. You can use the currently available dimensions for EC2 instances
+ * along with these metrics in order to refine the slice of data you want returned,
+ * such as metric CPUUtilization and dimension ImageId to get all CPUUtilization
+ * data for instances using the specified AMI.
+ *
+ * @var array
+ */
+ protected $_validMetrics = array('CPUUtilization', 'NetworkIn', 'NetworkOut',
+ 'DiskWriteOps', 'DiskReadBytes', 'DiskReadOps',
+ 'DiskWriteBytes', 'Latency', 'RequestCount',
+ 'HealthyHostCount', 'UnHealthyHostCount');
+
+ /**
+ * Amazon CloudWatch not only aggregates the raw data coming in, it also computes
+ * several statistics on the data. The following table lists the statistics that you can request:
+ *
+ * Minimum: The lowest value observed during the specified period. This can be used to
+ * determine low volumes of activity for your application.
+ *
+ * Maximum: The highest value observed during the specified period. You can use this to
+ * determine high volumes of activity for your application.
+ *
+ * Sum: The sum of all values received (if appropriate, for example a rate would not be
+ * summed, but a number of items would be). This statistic is useful for determining
+ * the total volume of a metric.
+ *
+ * Average: The Average of all values received during the specified period. By comparing
+ * this statistic with the minimum and maximum statistics, you can determine the full
+ * scope of a metric and how close the average use is to the minimum and the maximum.
+ * This will allow you to increase or decrease your resources as needed.
+ *
+ * Samples: The count (number) of measures used. This statistic is always returned to
+ * show the user the size of the dataset collected. This will allow the user to properly
+ * weight the data.
+ *
+ * Statistics are computed within a period you specify, such as all CPUUtilization within a
+ * five minute period. At a minimum, all data is aggregated into one minute intervals. This
+ * is the minimum resolution of the data. It is this data that can be aggregated into larger
+ * periods of time that you request.
+ *
+ * Aggregate data is generally available from the service within one minute from the end of the
+ * aggregation period. Delays in data propagation might cause late or partially late data in
+ * some cases. If your data is delayed, you should check the service’s Health Dashboard for
+ * any current operational issues with either Amazon CloudWatch or the services collecting
+ * the data, such as EC2 or Elastic Load Balancing.
+ *
+ * @var array
+ */
+ protected $_validStatistics = array('Average', 'Maximum', 'Minimum', 'Samples', 'Sum');
+
+ /**
+ * Valid Dimention Keys for getMetricStatistics
+ *
+ * ImageId: This dimension filters the data you request for all instances running
+ * this EC2 Amazon Machine Image (AMI).
+ *
+ * AvailabilityZone: This dimension filters the data you request for all instances
+ * running in that EC2 Availability Zone.
+ *
+ * AutoScalingGroupName: This dimension filters the data you request for all instances
+ * in a specified capacity group. An AutoScalingGroup is a collection of instances
+ * defined by customers of the Auto Scaling service. This dimension is only available
+ * for EC2 metrics when the instances are in such an AutoScalingGroup.
+ *
+ * InstanceId: This dimension filters the data you request for only the identified
+ * instance. This allows a user to pinpoint an exact instance from which to monitor data.
+ *
+ * InstanceType: This dimension filters the data you request for all instances running
+ * with this specified instance type. This allows a user to catagorize his data by the
+ * type of instance running. For example, a user might compare data from an m1.small instance
+ * and an m1.large instance to determine which has the better business value for his application.
+ *
+ * LoadBalancerName: This dimension filters the data you request for the specified LoadBalancer
+ * name. A LoadBalancer is represented by a DNS name and provides the single destination to
+ * which all requests intended for your application should be directed. This metric allows
+ * you to examine data from all instances connected to a single LoadBalancer.
+ *
+ * @var array
+ */
+ protected $_validDimensionsKeys = array('ImageId', 'AvailabilityZone', 'AutoScalingGroupName',
+ 'InstanceId', 'InstanceType', 'LoadBalancerName');
+
+ /**
+ * Returns data for one or more statistics of given a metric
+ *
+ * Note:
+ * The maximum number of datapoints that the Amazon CloudWatch service will
+ * return in a single GetMetricStatistics request is 1,440. If a request is
+ * made that would generate more datapoints than this amount, Amazon CloudWatch
+ * will return an error. You can alter your request by narrowing the time range
+ * (StartTime, EndTime) or increasing the Period in your single request. You may
+ * also get all of the data at the granularity you originally asked for by making
+ * multiple requests with adjacent time ranges.
+ *
+ * @param array $options The options you want to get statistics for:
+ * ** Required **
+ * MeasureName: The measure name that corresponds to
+ * the measure for the gathered metric. Valid EC2 Values are
+ * CPUUtilization, NetworkIn, NetworkOut, DiskWriteOps
+ * DiskReadBytes, DiskReadOps, DiskWriteBytes. Valid Elastic
+ * Load Balancing Metrics are Latency, RequestCount, HealthyHostCount
+ * UnHealthyHostCount
+ * Statistics: The statistics to be returned for the given metric. Valid
+ * values are Average, Maximum, Minimum, Samples, Sum. You can specify
+ * this as a string or as an array of values. If you don't specify one
+ * it will default to Average instead of failing out. If you specify an incorrect
+ * option it will just skip it.
+ * ** Optional **
+ * Dimensions: Amazon CloudWatch allows you to specify one Dimension to further filter
+ * metric data on. If you don't specify a dimension, the service returns the aggregate
+ * of all the measures with the given measure name and time range.
+ * Unit: The standard unit of Measurement for a given Measure. Valid Values: Seconds,
+ * Percent, Bytes, Bits, Count, Bytes/Second, Bits/Second, Count/Second, and None
+ * Constraints: When using count/second as the unit, you should use Sum as the statistic
+ * instead of Average. Otherwise, the sample returns as equal to the number of requests
+ * instead of the number of 60-second intervals. This will cause the Average to
+ * always equals one when the unit is count/second.
+ * StartTime: The timestamp of the first datapoint to return, inclusive. For example,
+ * 2008-02-26T19:00:00+00:00. We round your value down to the nearest minute.
+ * You can set your start time for more than two weeks in the past. However,
+ * you will only get data for the past two weeks. (in ISO 8601 format)
+ * Constraints: Must be before EndTime
+ * EndTime: The timestamp to use for determining the last datapoint to return. This is
+ * the last datapoint to fetch, exclusive. For example, 2008-02-26T20:00:00+00:00.
+ * (in ISO 8601 format)
+ */
+ public function getMetricStatistics(array $options)
+ {
+ $_usedStatistics = array();
+
+ $params = array();
+ $params['Action'] = 'GetMetricStatistics';
+
+ if (!isset($options['Period'])) {
+ $options['Period'] = 60;
+ }
+ if (!isset($options['Namespace'])) {
+ $options['Namespace'] = 'AWS/EC2';
+ }
+
+ if (!isset($options['MeasureName']) || !in_array($options['MeasureName'], $this->_validMetrics, true)) {
+ throw new Zend_Service_Amazon_Ec2_Exception('Invalid Metric Type: ' . $options['MeasureName']);
+ }
+
+ if(!isset($options['Statistics'])) {
+ $options['Statistics'][] = 'Average';
+ } elseif(!is_array($options['Statistics'])) {
+ $options['Statistics'][] = $options['Statistics'];
+ }
+
+ foreach($options['Statistics'] as $k=>$s) {
+ if(!in_array($s, $this->_validStatistics, true)) continue;
+ $options['Statistics.member.' . ($k+1)] = $s;
+ $_usedStatistics[] = $s;
+ }
+ unset($options['Statistics']);
+
+ if(isset($options['StartTime'])) {
+ if(!is_numeric($options['StartTime'])) $options['StartTime'] = strtotime($options['StartTime']);
+ $options['StartTime'] = gmdate('c', $options['StartTime']);
+ } else {
+ $options['StartTime'] = gmdate('c', strtotime('-1 hour'));
+ }
+
+ if(isset($options['EndTime'])) {
+ if(!is_numeric($options['EndTime'])) $options['EndTime'] = strtotime($options['EndTime']);
+ $options['EndTime'] = gmdate('c', $options['EndTime']);
+ } else {
+ $options['EndTime'] = gmdate('c');
+ }
+
+ if(isset($options['Dimensions'])) {
+ $x = 1;
+ foreach($options['Dimensions'] as $dimKey=>$dimVal) {
+ if(!in_array($dimKey, $this->_validDimensionsKeys, true)) continue;
+ $options['Dimensions.member.' . $x . '.Name'] = $dimKey;
+ $options['Dimensions.member.' . $x . '.Value'] = $dimVal;
+ $x++;
+ }
+
+ unset($options['Dimensions']);
+ }
+
+ $params = array_merge($params, $options);
+
+ $response = $this->sendRequest($params);
+ $response->setNamespace($this->_xmlNamespace);
+
+ $xpath = $response->getXPath();
+ $nodes = $xpath->query('//ec2:GetMetricStatisticsResult/ec2:Datapoints/ec2:member');
+
+ $return = array();
+ $return['label'] = $xpath->evaluate('string(//ec2:GetMetricStatisticsResult/ec2:Label/text())');
+ foreach ( $nodes as $node ) {
+ $item = array();
+
+ $item['Timestamp'] = $xpath->evaluate('string(ec2:Timestamp/text())', $node);
+ $item['Unit'] = $xpath->evaluate('string(ec2:Unit/text())', $node);
+ $item['Samples'] = $xpath->evaluate('string(ec2:Samples/text())', $node);
+ foreach($_usedStatistics as $us) {
+ $item[$us] = $xpath->evaluate('string(ec2:' . $us . '/text())', $node);
+ }
+
+ $return['datapoints'][] = $item;
+ unset($item, $node);
+ }
+
+ return $return;
+
+ }
+
+ /**
+ * Return the Metrics that are aviable for your current monitored instances
+ *
+ * @param string $nextToken The NextToken parameter is an optional parameter
+ * that allows you to retrieve the next set of results
+ * for your ListMetrics query.
+ * @return array
+ */
+ public function listMetrics($nextToken = null)
+ {
+ $params = array();
+ $params['Action'] = 'ListMetrics';
+ if (!empty($nextToken)) {
+ $params['NextToken'] = $nextToken;
+ }
+
+ $response = $this->sendRequest($params);
+ $response->setNamespace($this->_xmlNamespace);
+
+ $xpath = $response->getXPath();
+ $nodes = $xpath->query('//ec2:ListMetricsResult/ec2:Metrics/ec2:member');
+
+ $return = array();
+ foreach ( $nodes as $node ) {
+ $item = array();
+
+ $item['MeasureName'] = $xpath->evaluate('string(ec2:MeasureName/text())', $node);
+ $item['Namespace'] = $xpath->evaluate('string(ec2:Namespace/text())', $node);
+ $item['Deminsions']['name'] = $xpath->evaluate('string(ec2:Dimensions/ec2:member/ec2:Name/text())', $node);
+ $item['Deminsions']['value'] = $xpath->evaluate('string(ec2:Dimensions/ec2:member/ec2:Value/text())', $node);
+
+ if (empty($item['Deminsions']['name'])) {
+ $item['Deminsions'] = array();
+ }
+
+ $return[] = $item;
+ unset($item, $node);
+ }
+
+ return $return;
+ }
+}