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/
broker.go
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/
broker.go
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/*
Copyright 2020 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
http://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 lib
import (
"context"
"fmt"
"net/http"
"strconv"
"time"
monitoring "cloud.google.com/go/monitoring/apiv3/v2"
"github.com/golang/protobuf/ptypes"
"github.com/google/go-cmp/cmp"
"github.com/google/knative-gcp/test/lib/metrics"
"google.golang.org/api/iterator"
monitoringpb "google.golang.org/genproto/googleapis/monitoring/v3"
)
type BrokerMetricAssertion struct {
ProjectID string
BrokerName string
BrokerNamespace string
StartTime time.Time
CountPerType map[string]int64
}
func (a BrokerMetricAssertion) Assert(client *monitoring.MetricClient) error {
ctx := context.Background()
start, err := ptypes.TimestampProto(a.StartTime)
if err != nil {
return err
}
end, err := ptypes.TimestampProto(time.Now())
if err != nil {
return err
}
it := client.ListTimeSeries(ctx, &monitoringpb.ListTimeSeriesRequest{
Name: fmt.Sprintf("projects/%s", a.ProjectID),
Filter: a.StackdriverFilter(),
Interval: &monitoringpb.TimeInterval{StartTime: start, EndTime: end},
View: monitoringpb.ListTimeSeriesRequest_FULL,
})
gotCount := make(map[string]int64)
for {
ts, err := it.Next()
if err == iterator.Done {
break
}
if err != nil {
return err
}
labels := ts.GetMetric().GetLabels()
eventType := labels["event_type"]
code, err := strconv.Atoi(labels["response_code"])
if err != nil {
return fmt.Errorf("metric has invalid response code label: %v", ts.GetMetric())
}
// Ignore undesired response code in metric count comparison due to flakiness in broker.
// The sender pod will retry StatusCode 404, 503 and 500.
// StatusCode 500 is currently for reducing flakiness caused by Workload Identity credential sync up.
// We would remove it after https://github.com/google/knative-gcp/issues/1058 lands, as 500 error may indicate bugs in our code.
if code == http.StatusNotFound || code == http.StatusServiceUnavailable || code == http.StatusInternalServerError {
continue
}
if code != http.StatusAccepted {
return fmt.Errorf("metric has unexpected response code: %v", ts.GetMetric())
}
gotCount[eventType] = gotCount[eventType] + metrics.SumCumulative(ts)
}
if diff := cmp.Diff(a.CountPerType, gotCount); diff != "" {
return fmt.Errorf("unexpected broker metric count (-want, +got) = %v", diff)
}
return nil
}
func (a BrokerMetricAssertion) StackdriverFilter() string {
filter := map[string]interface{}{
"metric.type": BrokerEventCountMetricType,
"resource.type": BrokerMetricResourceType,
"resource.label.namespace_name": a.BrokerNamespace,
"resource.label.broker_name": a.BrokerName,
}
return metrics.StringifyStackDriverFilter(filter)
}