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CloudWatch 使用第 3 AWS SDK for PHP 版從 Amazon 獲取指標

指標是有關您系統效能的資料。您可以啟用某些資源的詳細監控，例如 Amazon EC2 執行個體或您自己的應用程式指標。

下列範例示範如何：

所有的範例程式碼都可以AWS SDK for PHP在這裡取得 GitHub。

登入資料

在執行範例程式碼之前，請依照中所述設定您的AWS認證憑證。然後匯入AWS SDK for PHP，如中所述基本使用。

列出指標

匯入

require 'vendor/autoload.php';

use Aws\CloudWatch\CloudWatchClient;
use Aws\Exception\AwsException;

範例程式碼

function listMetrics($cloudWatchClient)
{
    try {
        $result = $cloudWatchClient->listMetrics();

        $message = '';

        if (isset($result['@metadata']['effectiveUri'])) {
            $message .= 'For the effective URI at ' .
                $result['@metadata']['effectiveUri'] . ":\n\n";

            if (
                (isset($result['Metrics'])) and
                (count($result['Metrics']) > 0)
            ) {
                $message .= "Metrics found:\n\n";

                foreach ($result['Metrics'] as $metric) {
                    $message .= 'For metric ' . $metric['MetricName'] .
                        ' in namespace ' . $metric['Namespace'] . ":\n";

                    if (
                        (isset($metric['Dimensions'])) and
                        (count($metric['Dimensions']) > 0)
                    ) {
                        $message .= "Dimensions:\n";

                        foreach ($metric['Dimensions'] as $dimension) {
                            $message .= 'Name: ' . $dimension['Name'] .
                                ', Value: ' . $dimension['Value'] . "\n";
                        }

                        $message .= "\n";
                    } else {
                        $message .= "No dimensions.\n\n";
                    }
                }
            } else {
                $message .= 'No metrics found.';
            }
        } else {
            $message .= 'No metrics found.';
        }

        return $message;
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function listTheMetrics()
{
    $cloudWatchClient = new CloudWatchClient([
        'profile' => 'default',
        'region' => 'us-east-1',
        'version' => '2010-08-01'
    ]);

    echo listMetrics($cloudWatchClient);
}

// Uncomment the following line to run this code in an AWS account.
// listTheMetrics();

擷取指標的警示

匯入

require 'vendor/autoload.php';

use Aws\CloudWatch\CloudWatchClient;
use Aws\Exception\AwsException;

範例程式碼

function describeAlarmsForMetric(
    $cloudWatchClient,
    $metricName,
    $namespace,
    $dimensions
) {
    try {
        $result = $cloudWatchClient->describeAlarmsForMetric([
            'MetricName' => $metricName,
            'Namespace' => $namespace,
            'Dimensions' => $dimensions
        ]);

        $message = '';

        if (isset($result['@metadata']['effectiveUri'])) {
            $message .= 'At the effective URI of ' .
                $result['@metadata']['effectiveUri'] . ":\n\n";

            if (
                (isset($result['MetricAlarms'])) and
                (count($result['MetricAlarms']) > 0)
            ) {
                $message .= 'Matching alarms for ' . $metricName . ":\n\n";

                foreach ($result['MetricAlarms'] as $alarm) {
                    $message .= $alarm['AlarmName'] . "\n";
                }
            } else {
                $message .= 'No matching alarms found for ' . $metricName . '.';
            }
        } else {
            $message .= 'No matching alarms found for ' . $metricName . '.';
        }

        return $message;
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function describeTheAlarmsForMetric()
{
    $metricName = 'BucketSizeBytes';
    $namespace = 'AWS/S3';
    $dimensions = [
        [
            'Name' => 'StorageType',
            'Value' => 'StandardStorage'
        ],
        [
            'Name' => 'BucketName',
            'Value' => 'my-bucket'
        ]
    ];

    $cloudWatchClient = new CloudWatchClient([
        'profile' => 'default',
        'region' => 'us-east-1',
        'version' => '2010-08-01'
    ]);

    echo describeAlarmsForMetric(
        $cloudWatchClient,
        $metricName,
        $namespace,
        $dimensions
    );
}

// Uncomment the following line to run this code in an AWS account.
// describeTheAlarmsForMetric();

取得指標統計數字

匯入

require 'vendor/autoload.php';

use Aws\CloudWatch\CloudWatchClient;
use Aws\Exception\AwsException;

範例程式碼

function getMetricStatistics(
    $cloudWatchClient,
    $namespace,
    $metricName,
    $dimensions,
    $startTime,
    $endTime,
    $period,
    $statistics,
    $unit
) {
    try {
        $result = $cloudWatchClient->getMetricStatistics([
            'Namespace' => $namespace,
            'MetricName' => $metricName,
            'Dimensions' => $dimensions,
            'StartTime' => $startTime,
            'EndTime' => $endTime,
            'Period' => $period,
            'Statistics' => $statistics,
            'Unit' => $unit
        ]);

        $message = '';

        if (isset($result['@metadata']['effectiveUri'])) {
            $message .= 'For the effective URI at ' .
                $result['@metadata']['effectiveUri'] . "\n\n";

            if (
                (isset($result['Datapoints'])) and
                (count($result['Datapoints']) > 0)
            ) {
                $message .= "Datapoints found:\n\n";

                foreach ($result['Datapoints'] as $datapoint) {
                    foreach ($datapoint as $key => $value) {
                        $message .= $key . ' = ' . $value . "\n";
                    }

                    $message .= "\n";
                }
            } else {
                $message .= 'No datapoints found.';
            }
        } else {
            $message .= 'No datapoints found.';
        }

        return $message;
    } catch (AwsException $e) {
        return 'Error: ' . $e->getAwsErrorMessage();
    }
}

function getTheMetricStatistics()
{
    // Average number of Amazon EC2 vCPUs every 5 minutes within
    // the past 3 hours.
    $namespace = 'AWS/Usage';
    $metricName = 'ResourceCount';
    $dimensions = [
        [
            'Name' => 'Service',
            'Value' => 'EC2'
        ],
        [
            'Name' => 'Resource',
            'Value' => 'vCPU'
        ],
        [
            'Name' => 'Type',
            'Value' => 'Resource'
        ],
        [
            'Name' => 'Class',
            'Value' => 'Standard/OnDemand'
        ]
    ];
    $startTime = strtotime('-3 hours');
    $endTime = strtotime('now');
    $period = 300; // Seconds. (5 minutes = 300 seconds.)
    $statistics = ['Average'];
    $unit = 'None';

    $cloudWatchClient = new CloudWatchClient([
        'profile' => 'default',
        'region' => 'us-east-1',
        'version' => '2010-08-01'
    ]);

    echo getMetricStatistics(
        $cloudWatchClient,
        $namespace,
        $metricName,
        $dimensions,
        $startTime,
        $endTime,
        $period,
        $statistics,
        $unit
    );

    // Another example: average number of bytes of standard storage in the
    // specified Amazon S3 bucket each day for the past 3 days.

    /*
    $namespace = 'AWS/S3';
    $metricName = 'BucketSizeBytes';
    $dimensions = [
        [
            'Name' => 'StorageType',
            'Value'=> 'StandardStorage'
        ],
        [
            'Name' => 'BucketName',
            'Value' => 'my-bucket'
        ]
    ];
    $startTime = strtotime('-3 days');
    $endTime = strtotime('now');
    $period = 86400; // Seconds. (1 day = 86400 seconds.)
    $statistics = array('Average');
    $unit = 'Bytes';

    $cloudWatchClient = new CloudWatchClient([
        'profile' => 'default',
        'region' => 'us-east-1',
        'version' => '2010-08-01'
    ]);

    echo getMetricStatistics($cloudWatchClient, $namespace, $metricName,
    $dimensions, $startTime, $endTime, $period, $statistics, $unit);
    */
}

// Uncomment the following line to run this code in an AWS account.
// getTheMetricStatistics();