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Lire les données de métrique agrégées

Explique comment lire des données de séries temporelles réduites.

Pages de documentation incluant cet exemple de code

Pour afficher l'exemple de code utilisé en contexte, consultez la documentation suivante :

Exemple de code

C#

public static object ReadTimeSeriesReduce(string projectId,
    string metricType = "compute.googleapis.com/instance/cpu/utilization")
{
    // Create client.
    MetricServiceClient metricServiceClient = MetricServiceClient.Create();
    // Initialize request argument(s).
    string filter = $"metric.type=\"{metricType}\"";
    ListTimeSeriesRequest request = new ListTimeSeriesRequest
    {
        ProjectName = new ProjectName(projectId),
        Filter = filter,
        Interval = new TimeInterval(),
    };
    // Create timestamp for current time formatted in seconds.
    long timeStamp = (long)(DateTime.UtcNow - s_unixEpoch).TotalSeconds;
    Timestamp startTimeStamp = new Timestamp();
    // Set startTime to limit results to the last 20 minutes.
    startTimeStamp.Seconds = timeStamp - (60 * 20);
    Timestamp endTimeStamp = new Timestamp();
    // Set endTime to current time.
    endTimeStamp.Seconds = timeStamp;
    TimeInterval interval = new TimeInterval();
    interval.StartTime = startTimeStamp;
    interval.EndTime = endTimeStamp;
    request.Interval = interval;
    // Aggregate results per matching instance.
    Aggregation aggregation = new Aggregation();
    Duration alignmentPeriod = new Duration();
    alignmentPeriod.Seconds = 600;
    aggregation.AlignmentPeriod = alignmentPeriod;
    aggregation.CrossSeriesReducer = Aggregation.Types.Reducer.ReduceMean;
    aggregation.PerSeriesAligner = Aggregation.Types.Aligner.AlignMean;
    // Add the aggregation to the request.
    request.Aggregation = aggregation;
    // Make the request.
    PagedEnumerable<ListTimeSeriesResponse, TimeSeries> response =
        metricServiceClient.ListTimeSeries(request);
    // Iterate over all response items, lazily performing RPCs as required.
    Console.WriteLine("CPU utilization:");
    foreach (var item in response)
    {
        var points = item.Points;
        Console.WriteLine("Average CPU utilization across all GCE instances:");
        Console.WriteLine($"  Last 10 min: {points[0].Value.DoubleValue}");
        Console.WriteLine($"  Last 10-20 min ago: {points[1].Value.DoubleValue}");
    }
    return 0;
}

Go

import (
	"context"
	"fmt"
	"io"
	"time"

	monitoring "cloud.google.com/go/monitoring/apiv3"
	"github.com/golang/protobuf/ptypes/duration"
	"github.com/golang/protobuf/ptypes/timestamp"
	"google.golang.org/api/iterator"
	monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
)

// readTimeSeriesReduce reads the last 20 minutes of the given metric, aligns
// everything on 10 minute intervals, and combines values from different
// instances.
func readTimeSeriesReduce(w io.Writer, projectID string) error {
	ctx := context.Background()
	client, err := monitoring.NewMetricClient(ctx)
	if err != nil {
		return fmt.Errorf("NewMetricClient: %v", err)
	}
	startTime := time.Now().UTC().Add(time.Minute * -20)
	endTime := time.Now().UTC()
	req := &monitoringpb.ListTimeSeriesRequest{
		Name:   "projects/" + projectID,
		Filter: `metric.type="compute.googleapis.com/instance/cpu/utilization"`,
		Interval: &monitoringpb.TimeInterval{
			StartTime: &timestamp.Timestamp{
				Seconds: startTime.Unix(),
			},
			EndTime: &timestamp.Timestamp{
				Seconds: endTime.Unix(),
			},
		},
		Aggregation: &monitoringpb.Aggregation{
			CrossSeriesReducer: monitoringpb.Aggregation_REDUCE_MEAN,
			PerSeriesAligner:   monitoringpb.Aggregation_ALIGN_MEAN,
			AlignmentPeriod: &duration.Duration{
				Seconds: 600,
			},
		},
	}
	it := client.ListTimeSeries(ctx, req)
	for {
		resp, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return fmt.Errorf("could not read time series value: %v", err)
		}
		fmt.Fprintln(w, "Average CPU utilization across all GCE instances:")
		fmt.Fprintf(w, "\tNow: %.4f\n", resp.GetPoints()[0].GetValue().GetDoubleValue())
		if len(resp.GetPoints()) > 1 {
			fmt.Fprintf(w, "\t10 minutes ago: %.4f\n", resp.GetPoints()[1].GetValue().GetDoubleValue())
		}
	}
	fmt.Fprintln(w, "Done")
	return nil
}

Java

MetricServiceClient metricServiceClient = MetricServiceClient.create();
String projectId = System.getProperty("projectId");
ProjectName name = ProjectName.of(projectId);

// Restrict time to last 20 minutes
long startMillis = System.currentTimeMillis() - ((60 * 20) * 1000);
TimeInterval interval =
    TimeInterval.newBuilder()
        .setStartTime(Timestamps.fromMillis(startMillis))
        .setEndTime(Timestamps.fromMillis(System.currentTimeMillis()))
        .build();

Aggregation aggregation =
    Aggregation.newBuilder()
        .setAlignmentPeriod(Duration.newBuilder().setSeconds(600).build())
        .setPerSeriesAligner(Aggregation.Aligner.ALIGN_MEAN)
        .setCrossSeriesReducer(Aggregation.Reducer.REDUCE_MEAN)
        .build();

ListTimeSeriesRequest.Builder requestBuilder =
    ListTimeSeriesRequest.newBuilder()
        .setName(name.toString())
        .setFilter("metric.type=\"compute.googleapis.com/instance/cpu/utilization\"")
        .setInterval(interval)
        .setAggregation(aggregation);

ListTimeSeriesRequest request = requestBuilder.build();

ListTimeSeriesPagedResponse response = metricServiceClient.listTimeSeries(request);

System.out.println("Got timeseries: ");
for (TimeSeries ts : response.iterateAll()) {
  System.out.println(ts);
}

Node.js

// Imports the Google Cloud client library
const monitoring = require('@google-cloud/monitoring');

// Creates a client
const client = new monitoring.MetricServiceClient();

/**
 * TODO(developer): Uncomment and edit the following lines of code.
 */
// const projectId = 'YOUR_PROJECT_ID';

const request = {
  name: client.projectPath(projectId),
  filter: 'metric.type="compute.googleapis.com/instance/cpu/utilization"',
  interval: {
    startTime: {
      // Limit results to the last 20 minutes
      seconds: Date.now() / 1000 - 60 * 20,
    },
    endTime: {
      seconds: Date.now() / 1000,
    },
  },
  // Aggregate results per matching instance
  aggregation: {
    alignmentPeriod: {
      seconds: 600,
    },
    crossSeriesReducer: 'REDUCE_MEAN',
    perSeriesAligner: 'ALIGN_MEAN',
  },
};

// Writes time series data
const [result] = await client.listTimeSeries(request);
if (result.length === 0) {
  console.log('No data');
  return;
}
const reductions = result[0].points;

console.log('Average CPU utilization across all GCE instances:');
console.log(`  Last 10 min: ${reductions[0].value.doubleValue}`);
console.log(`  10-20 min ago: ${reductions[0].value.doubleValue}`);

PHP

use Google\Cloud\Monitoring\V3\MetricServiceClient;
use Google\Cloud\Monitoring\V3\Aggregation_Aligner;
use Google\Cloud\Monitoring\V3\Aggregation_Reducer;
use Google\Cloud\Monitoring\V3\Aggregation;
use Google\Cloud\Monitoring\V3\TimeInterval;
use Google\Cloud\Monitoring\V3\ListTimeSeriesRequest_TimeSeriesView;
use Google\Protobuf\Duration;
use Google\Protobuf\Timestamp;

/**
 * Example:
 * ```
 * read_timeseries_reduce($projectId);
 * ```
 *
 * @param string $projectId Your project ID
 */
function read_timeseries_reduce($projectId, $minutesAgo = 20)
{
    $metrics = new MetricServiceClient([
        'projectId' => $projectId,
    ]);

    $projectName = $metrics->projectName($projectId);
    $filter = 'metric.type="compute.googleapis.com/instance/cpu/utilization"';

    $startTime = new Timestamp();
    $startTime->setSeconds(time() - (60 * $minutesAgo));
    $endTime = new Timestamp();
    $endTime->setSeconds(time());

    $interval = new TimeInterval();
    $interval->setStartTime($startTime);
    $interval->setEndTime($endTime);

    $alignmentPeriod = new Duration();
    $alignmentPeriod->setSeconds(600);
    $aggregation = new Aggregation();
    $aggregation->setAlignmentPeriod($alignmentPeriod);
    $aggregation->setCrossSeriesReducer(Aggregation_Reducer::REDUCE_MEAN);
    $aggregation->setPerSeriesAligner(Aggregation_Aligner::ALIGN_MEAN);

    $view = ListTimeSeriesRequest_TimeSeriesView::FULL;

    $result = $metrics->listTimeSeries(
        $projectName,
        $filter,
        $interval,
        $view,
        ['aggregation' => $aggregation]);

    printf('Average CPU utilization across all GCE instances:' . PHP_EOL);
    if ($timeSeries = $result->iterateAllElements()->current()) {
        $reductions = $timeSeries->getPoints();
        printf('  Last 10 minutes: ');
        printf($reductions[0]->getValue()->getDoubleValue() . PHP_EOL);
        if (count($reductions) > 1) {
            printf('  10-20 minutes ago: ');
            printf($reductions[1]->getValue()->getDoubleValue() . PHP_EOL);
        }
    }
}

Python

client = monitoring_v3.MetricServiceClient()
project_name = f"projects/{project_id}"

now = time.time()
seconds = int(now)
nanos = int((now - seconds) * 10 ** 9)
interval = monitoring_v3.TimeInterval(
    {
        "end_time": {"seconds": seconds, "nanos": nanos},
        "start_time": {"seconds": (seconds - 3600), "nanos": nanos},
    }
)
aggregation = monitoring_v3.Aggregation(
    {
        "alignment_period": {"seconds": 1200},  # 20 minutes
        "per_series_aligner": monitoring_v3.Aggregation.Aligner.ALIGN_MEAN,
        "cross_series_reducer": monitoring_v3.Aggregation.Reducer.REDUCE_MEAN,
        "group_by_fields": ["resource.zone"],
    }
)

results = client.list_time_series(
    request={
        "name": project_name,
        "filter": 'metric.type = "compute.googleapis.com/instance/cpu/utilization"',
        "interval": interval,
        "view": monitoring_v3.ListTimeSeriesRequest.TimeSeriesView.FULL,
        "aggregation": aggregation,
    }
)
for result in results:
    print(result)

Ruby

# Your Google Cloud Platform project ID
# project_id = "YOUR_PROJECT_ID"

client = Google::Cloud::Monitoring.metric_service
project_name = client.project_path project: project_id

interval = Google::Cloud::Monitoring::V3::TimeInterval.new
now = Time.now
interval.end_time = Google::Protobuf::Timestamp.new seconds: now.to_i,
                                                    nanos:   now.nsec
interval.start_time = Google::Protobuf::Timestamp.new seconds: now.to_i - 1200,
                                                      nanos:   now.nsec
filter = 'metric.type = "compute.googleapis.com/instance/cpu/utilization"'
view = Google::Cloud::Monitoring::V3::ListTimeSeriesRequest::TimeSeriesView::FULL
aggregation = Google::Cloud::Monitoring::V3::Aggregation.new(
  alignment_period:     { seconds: 1200 },
  per_series_aligner:   Google::Cloud::Monitoring::V3::Aggregation::Aligner::ALIGN_MEAN,
  cross_series_reducer: Google::Cloud::Monitoring::V3::Aggregation::Reducer::REDUCE_MEAN,
  group_by_fields:      ["resource.zone"]
)

results = client.list_time_series name:        project_name,
                                  filter:      filter,
                                  interval:    interval,
                                  view:        view,
                                  aggregation: aggregation
results.each do |result|
  p result
end