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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 custommetric contains custom metric samples.
package custommetric
import (
"context"
"fmt"
"log"
"math/rand"
"time"
monitoring "cloud.google.com/go/monitoring/apiv3"
timestamp "github.com/golang/protobuf/ptypes/timestamp"
"google.golang.org/api/iterator"
metricpb "google.golang.org/genproto/googleapis/api/metric"
monitoredres "google.golang.org/genproto/googleapis/api/monitoredres"
monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
)
const metricType = "custom.googleapis.com/custom_measurement"
// [START monitoring_write_timeseries]
// writeTimeSeriesValue writes a value for the custom metric created
func writeTimeSeriesValue(projectID, metricType string) error {
ctx := context.Background()
c, err := monitoring.NewMetricClient(ctx)
if err != nil {
return err
}
now := &timestamp.Timestamp{
Seconds: time.Now().Unix(),
}
req := &monitoringpb.CreateTimeSeriesRequest{
Name: "projects/" + projectID,
TimeSeries: []*monitoringpb.TimeSeries{{
Metric: &metricpb.Metric{
Type: metricType,
Labels: map[string]string{
"environment": "STAGING",
},
},
Resource: &monitoredres.MonitoredResource{
Type: "gce_instance",
Labels: map[string]string{
"instance_id": "test-instance",
"zone": "us-central1-f",
},
},
Points: []*monitoringpb.Point{{
Interval: &monitoringpb.TimeInterval{
StartTime: now,
EndTime: now,
},
Value: &monitoringpb.TypedValue{
Value: &monitoringpb.TypedValue_Int64Value{
Int64Value: rand.Int63n(10),
},
},
}},
}},
}
log.Printf("writeTimeseriesRequest: %+v\n", req)
err = c.CreateTimeSeries(ctx, req)
if err != nil {
return fmt.Errorf("could not write time series value, %v ", err)
}
return nil
}
// [END monitoring_write_timeseries]
// [START monitoring_read_timeseries_simple]
// readTimeSeriesValue reads the TimeSeries for the value specified by metric type in a time window from the last 20 minutes.
func readTimeSeriesValue(projectID, metricType string) error {
ctx := context.Background()
c, err := monitoring.NewMetricClient(ctx)
if err != nil {
return err
}
startTime := time.Now().UTC().Add(time.Minute * -20).Unix()
endTime := time.Now().UTC().Unix()
req := &monitoringpb.ListTimeSeriesRequest{
Name: "projects/" + projectID,
Filter: fmt.Sprintf("metric.type=\"%s\"", metricType),
Interval: &monitoringpb.TimeInterval{
StartTime: &timestamp.Timestamp{Seconds: startTime},
EndTime: &timestamp.Timestamp{Seconds: endTime},
},
}
iter := c.ListTimeSeries(ctx, req)
for {
resp, err := iter.Next()
if err == iterator.Done {
break
}
if err != nil {
return fmt.Errorf("could not read time series value, %v ", err)
}
log.Printf("%+v\n", resp)
}
return nil
}
// [END monitoring_read_timeseries_simple]
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