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time_series_align.go
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time_series_align.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package snippets contains examples of using the monitoring API.
package snippets
// [START monitoring_read_timeseries_align]
import (
"context"
"fmt"
"io"
"time"
monitoring "cloud.google.com/go/monitoring/apiv3"
"cloud.google.com/go/monitoring/apiv3/v2/monitoringpb"
"github.com/golang/protobuf/ptypes/duration"
"github.com/golang/protobuf/ptypes/timestamp"
"google.golang.org/api/iterator"
)
// readTimeSeriesAlign reads the last 20 minutes of the given metric and aligns
// everything on 10 minute intervals.
func readTimeSeriesAlign(w io.Writer, projectID string) error {
ctx := context.Background()
client, err := monitoring.NewMetricClient(ctx)
if err != nil {
return fmt.Errorf("NewMetricClient: %w", err)
}
defer client.Close()
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: ×tamp.Timestamp{
Seconds: startTime.Unix(),
},
EndTime: ×tamp.Timestamp{
Seconds: endTime.Unix(),
},
},
Aggregation: &monitoringpb.Aggregation{
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: %w", err)
}
fmt.Fprintln(w, resp.GetMetric().GetLabels()["instance_name"])
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
}
// [END monitoring_read_timeseries_align]