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| 1 | +// Copyright The OpenTelemetry Authors |
| 2 | +// |
| 3 | +// Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | +// you may not use this file except in compliance with the License. |
| 5 | +// You may obtain a copy of the License at |
| 6 | +// |
| 7 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | +// |
| 9 | +// Unless required by applicable law or agreed to in writing, software |
| 10 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | +// See the License for the specific language governing permissions and |
| 13 | +// limitations under the License. |
| 14 | + |
| 15 | +package v1beta1 |
| 16 | + |
| 17 | +import ( |
| 18 | + "context" |
| 19 | + "strings" |
| 20 | + |
| 21 | + "go.opentelemetry.io/otel" |
| 22 | + "go.opentelemetry.io/otel/attribute" |
| 23 | + "go.opentelemetry.io/otel/exporters/prometheus" |
| 24 | + "go.opentelemetry.io/otel/metric" |
| 25 | + sdkmetric "go.opentelemetry.io/otel/sdk/metric" |
| 26 | + "sigs.k8s.io/controller-runtime/pkg/metrics" |
| 27 | +) |
| 28 | + |
| 29 | +const ( |
| 30 | + meterName = "crd-metrics" |
| 31 | +) |
| 32 | + |
| 33 | +// Metric labels |
| 34 | + |
| 35 | +const ( |
| 36 | + prefix = "opentelemetry_collector_" |
| 37 | + receivers = prefix + "receivers" |
| 38 | + exporters = prefix + "exporters" |
| 39 | + processors = prefix + "processors" |
| 40 | + extensions = prefix + "extensions" |
| 41 | + mode = prefix + "info" |
| 42 | +) |
| 43 | + |
| 44 | +type components struct { |
| 45 | + receivers []string |
| 46 | + processors []string |
| 47 | + exporters []string |
| 48 | + extensions []string |
| 49 | +} |
| 50 | + |
| 51 | +// BootstrapMetrics configures the OpenTelemetry meter provider with the Prometheus exporter. |
| 52 | +func BootstrapMetrics() error { |
| 53 | + |
| 54 | + exporter, err := prometheus.New(prometheus.WithRegisterer(metrics.Registry)) |
| 55 | + if err != nil { |
| 56 | + return err |
| 57 | + } |
| 58 | + provider := sdkmetric.NewMeterProvider(sdkmetric.WithReader(exporter)) |
| 59 | + otel.SetMeterProvider(provider) |
| 60 | + return err |
| 61 | +} |
| 62 | + |
| 63 | +func extractElements(elements map[string]interface{}) []string { |
| 64 | + if elements == nil { |
| 65 | + return []string{} |
| 66 | + } |
| 67 | + |
| 68 | + itemsMap := map[string]struct{}{} |
| 69 | + var items []string |
| 70 | + for key := range elements { |
| 71 | + itemName := strings.SplitN(key, "/", 2)[0] |
| 72 | + itemsMap[itemName] = struct{}{} |
| 73 | + } |
| 74 | + for key := range itemsMap { |
| 75 | + items = append(items, key) |
| 76 | + } |
| 77 | + return items |
| 78 | +} |
| 79 | + |
| 80 | +func getComponentsFromConfigV1Beta1(yamlContent Config) *components { |
| 81 | + |
| 82 | + info := &components{ |
| 83 | + receivers: extractElements(yamlContent.Receivers.Object), |
| 84 | + exporters: extractElements(yamlContent.Exporters.Object), |
| 85 | + } |
| 86 | + |
| 87 | + if yamlContent.Processors != nil { |
| 88 | + info.processors = extractElements(yamlContent.Processors.Object) |
| 89 | + } |
| 90 | + |
| 91 | + if yamlContent.Extensions != nil { |
| 92 | + info.extensions = extractElements(yamlContent.Extensions.Object) |
| 93 | + } |
| 94 | + return info |
| 95 | +} |
| 96 | + |
| 97 | +func IncCounters(ctx context.Context, collector *OpenTelemetryCollector) error { |
| 98 | + return updateCounter(ctx, collector, true) |
| 99 | +} |
| 100 | + |
| 101 | +func DecCounters(ctx context.Context, collector *OpenTelemetryCollector) error { |
| 102 | + return updateCounter(ctx, collector, false) |
| 103 | +} |
| 104 | + |
| 105 | +func updateCounter(ctx context.Context, collector *OpenTelemetryCollector, up bool) error { |
| 106 | + meter := otel.Meter(meterName) |
| 107 | + receiversCounter, err := meter.Int64UpDownCounter(receivers) |
| 108 | + if err != nil { |
| 109 | + return err |
| 110 | + } |
| 111 | + |
| 112 | + exporterCounter, err := meter.Int64UpDownCounter(exporters) |
| 113 | + if err != nil { |
| 114 | + return err |
| 115 | + } |
| 116 | + |
| 117 | + processorCounter, err := meter.Int64UpDownCounter(processors) |
| 118 | + if err != nil { |
| 119 | + return err |
| 120 | + } |
| 121 | + |
| 122 | + extensionsCounter, err := meter.Int64UpDownCounter(extensions) |
| 123 | + if err != nil { |
| 124 | + return err |
| 125 | + } |
| 126 | + |
| 127 | + components := getComponentsFromConfigV1Beta1(collector.Spec.Config) |
| 128 | + moveCounter(ctx, collector, components.receivers, receiversCounter, up) |
| 129 | + moveCounter(ctx, collector, components.exporters, exporterCounter, up) |
| 130 | + moveCounter(ctx, collector, components.processors, processorCounter, up) |
| 131 | + moveCounter(ctx, collector, components.extensions, extensionsCounter, up) |
| 132 | + |
| 133 | + return nil |
| 134 | +} |
| 135 | + |
| 136 | +func moveCounter( |
| 137 | + ctx context.Context, collector *OpenTelemetryCollector, types []string, upDown metric.Int64UpDownCounter, up bool) { |
| 138 | + for _, exporter := range types { |
| 139 | + inc := 1 |
| 140 | + if !up { |
| 141 | + inc = -1 |
| 142 | + } |
| 143 | + upDown.Add(ctx, int64(inc), metric.WithAttributes( |
| 144 | + attribute.Key("collector_name").String(collector.Name), |
| 145 | + attribute.Key("namespace").String(collector.Namespace), |
| 146 | + attribute.Key("type").String(exporter), |
| 147 | + )) |
| 148 | + } |
| 149 | +} |
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