opentelemetry-collector/processor/memorylimiter/metrics.go

95 lines
2.7 KiB
Go

// Copyright 2019, OpenTelemetry Authors
//
// 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.
// This file contains metrics to record dropped data via memory limiter,
// the package and its int wouldn't be necessary when proper dependencies are
// exposed via packages.
package memorylimiter
import (
"sync"
"go.opencensus.io/stats"
"go.opencensus.io/stats/view"
"go.opencensus.io/tag"
)
// Keys and stats for telemetry.
var (
TagExporterNameKey, _ = tag.NewKey("exporter")
StatDroppedSpanCount = stats.Int64(
"spans_dropped",
"counts the number of spans dropped",
stats.UnitDimensionless)
StatDroppedMetricCount = stats.Int64(
"metrics_dropped",
"counts the number of metrics dropped",
stats.UnitDimensionless)
)
var initOnce sync.Once
func initMetrics() {
initOnce.Do(func() {
tagKeys := []tag.Key{
TagExporterNameKey,
}
droppedSpanBatchesView := &view.View{
Name: "batches_dropped",
Measure: StatDroppedSpanCount,
Description: "The number of span batches dropped.",
TagKeys: tagKeys,
Aggregation: view.Count(),
}
droppedSpansView := &view.View{
Name: StatDroppedSpanCount.Name(),
Measure: StatDroppedSpanCount,
Description: "The number of spans dropped.",
TagKeys: tagKeys,
Aggregation: view.Sum(),
}
droppedMetricBatchesView := &view.View{
Name: "batches_dropped",
Measure: StatDroppedMetricCount,
Description: "The number of metric batches dropped.",
TagKeys: tagKeys,
Aggregation: view.Count(),
}
droppedMetricsView := &view.View{
Name: StatDroppedMetricCount.Name(),
Measure: StatDroppedMetricCount,
Description: "The number of metrics dropped.",
TagKeys: tagKeys,
Aggregation: view.Sum(),
}
view.Register(droppedSpanBatchesView, droppedSpansView, droppedMetricBatchesView, droppedMetricsView)
})
}
// statsTagsForBatch creates a tag.Mutator that can be used to add a metric
// label with the processorName to context.Context via stats.RecordWithTags
// function. This ensures uniformity of labels for the metrics.
func statsTagsForBatch(processorName string) []tag.Mutator {
statsTags := []tag.Mutator{
tag.Upsert(TagExporterNameKey, processorName),
}
return statsTags
}