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wavefront_converter.go
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/
wavefront_converter.go
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// Copyright 2018-2019 VMware, Inc. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
package summary
import (
"strings"
"github.com/wavefronthq/observability-for-kubernetes/collector/internal/wf"
"github.com/wavefronthq/go-metrics-wavefront/reporting"
"github.com/wavefronthq/observability-for-kubernetes/collector/internal/configuration"
"github.com/wavefronthq/observability-for-kubernetes/collector/internal/filter"
"github.com/wavefronthq/observability-for-kubernetes/collector/internal/metrics"
"github.com/wavefronthq/observability-for-kubernetes/collector/internal/util"
gm "github.com/rcrowley/go-metrics"
log "github.com/sirupsen/logrus"
)
// converts Sets to Metrics.
type pointConverter struct {
cluster string
prefix string
tags map[string]string
filters filter.Filter
collectedPoints gm.Counter
filteredPoints gm.Counter
}
// NewPointConverter creates a new processor that converts summary stats data into the Wavefront point format
func NewPointConverter(cfg configuration.SummarySourceConfig, cluster string) (metrics.Processor, error) {
cluster = strings.TrimSpace(cluster)
if cluster == "" {
cluster = "k8s-cluster"
}
pt := map[string]string{"type": "kubernetes.summary_api"}
return &pointConverter{
cluster: cluster,
prefix: configuration.GetStringValue(cfg.Prefix, "kubernetes."),
tags: cfg.Tags,
filters: filter.FromConfig(cfg.Filters),
collectedPoints: gm.GetOrRegisterCounter(reporting.EncodeKey("source.points.collected", pt), gm.DefaultRegistry),
filteredPoints: gm.GetOrRegisterCounter(reporting.EncodeKey("source.points.filtered", pt), gm.DefaultRegistry),
}, nil
}
func (converter *pointConverter) Name() string {
return "wavefront_point_converter"
}
func (converter *pointConverter) Process(batch *metrics.Batch) (*metrics.Batch, error) {
if len(batch.Sets) == 0 {
return batch, nil
}
metricSets := batch.Sets
nodeName := util.GetNodeName()
ts := batch.Timestamp
log.WithField("total", len(metricSets)).Debug("Processing metric sets")
for _, key := range sortedMetricSetKeys(metricSets) {
ms := metricSets[key]
// Populate tag map
tags := make(map[string]string)
// Add pod labels as tags
converter.addLabelTags(ms, tags)
hostname := tags["hostname"]
metricType := tags["type"]
if strings.Contains(tags["container_name"], sysSubContainerName) {
//don't send system subcontainers
continue
}
for _, metricName := range sortedMetricValueKeys(ms.Values) {
metricValue := ms.Values[metricName]
var value float64
if metrics.ValueInt64 == metricValue.ValueType {
value = float64(metricValue.IntValue)
} else if metrics.ValueFloat == metricValue.ValueType {
value = metricValue.FloatValue
} else {
continue
}
ts := ts.Unix()
source := nodeName
if source == "" {
if metricType == "cluster" {
source = converter.cluster
} else if metricType == "ns" {
source = tags["namespace_name"] + "-ns"
} else {
source = hostname
}
}
// convert to a point and add it to the data batch
point := wf.NewPoint(converter.cleanMetricName(metricType, metricName), value, ts, source, tags)
batch.Metrics = wf.FilterAppend(converter.filters, converter.filteredPoints, batch.Metrics, point)
converter.collectedPoints.Inc(1)
}
for _, metric := range ms.LabeledValues {
var value float64
if metrics.ValueInt64 == metric.ValueType {
value = float64(metric.IntValue)
} else if metrics.ValueFloat == metric.ValueType {
value = metric.FloatValue
} else {
continue
}
ts := ts.Unix()
source := nodeName
if source == "" {
source = hostname
}
labels := metric.Labels
if labels == nil {
labels = make(map[string]string, len(tags))
}
for k, v := range tags {
labels[k] = v
}
// convert to a point and add it to the data batch
point := wf.NewPoint(converter.cleanMetricName(metricType, metric.Name), value, ts, source, labels)
batch.Metrics = wf.FilterAppend(converter.filters, converter.filteredPoints, batch.Metrics, point)
converter.collectedPoints.Inc(1)
}
}
return batch, nil
}
func (converter *pointConverter) addLabelTags(ms *metrics.Set, tags map[string]string) {
for _, labelName := range sortedLabelKeys(ms.Labels) {
labelValue := ms.Labels[labelName]
if labelName == "labels" {
for _, label := range strings.Split(labelValue, ",") {
//labels = app:webproxy,version:latest
tagParts := strings.SplitN(label, ":", 2)
if len(tagParts) == 2 {
tags["label."+tagParts[0]] = tagParts[1]
}
}
} else {
tags[labelName] = labelValue
}
}
}
func (converter *pointConverter) cleanMetricName(metricType string, metricName string) string {
cleanName := converter.prefix
if len(metricType) > 0 {
cleanName += metricType + "."
}
return cleanName + strings.Replace(metricName, "/", ".", -1)
}