[exporter/elasticsearch] Add initial support for metrics

.chloggen/add-metrics-to-elasticsearch-exporter.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: exporter/elasticsearch
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add initial support for metrics
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [33513]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

exporter/elasticsearchexporter/README.md

@@ -3,11 +3,13 @@
 <!-- status autogenerated section -->
 | Status        |           |
 | ------------- |-----------|
-| Stability     | [beta]: traces, logs   |
+| Stability     | [development]: metrics   |
+|               | [beta]: traces, logs   |
 | Distributions | [contrib] |
 | Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aexporter%2Felasticsearch%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aexporter%2Felasticsearch) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aexporter%2Felasticsearch%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aexporter%2Felasticsearch) |
 | [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@JaredTan95](https://www.github.com/JaredTan95), [@ycombinator](https://www.github.com/ycombinator), [@carsonip](https://www.github.com/carsonip) |
 
+[development]: https://github.com/open-telemetry/opentelemetry-collector#development
 [beta]: https://github.com/open-telemetry/opentelemetry-collector#beta
 [contrib]: https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib
 <!-- end autogenerated section -->
@@ -91,6 +93,13 @@ This can be customised through the following settings:
   takes resource or log record attribute named `elasticsearch.index.prefix` and `elasticsearch.index.suffix`
   resulting dynamically prefixed / suffixed indexing based on `logs_index`. (priority: resource attribute > log record attribute)
   - `enabled`(default=false): Enable/Disable dynamic index for log records
+- `metrics_index`: The [index] or [data stream] name to publish metrics to. The default value is `metrics-generic-default`.
+  ⚠️ Note that metrics support is currently in development.
+- `metrics_dynamic_index` (optional):
+  takes resource attributes named `elasticsearch.index.prefix` and `elasticsearch.index.suffix`
+  resulting dynamically prefixed / suffixed indexing based on `metrics_index`.
+  ⚠️ Note that metrics support is currently in development.
+  - `enabled`(default=false): Enable/Disable dynamic index for metrics
 - `traces_index`: The [index] or [data stream] name to publish traces to. The default value is `traces-generic-default`.
 - `traces_dynamic_index` (optional):
   takes resource or span attribute named `elasticsearch.index.prefix` and `elasticsearch.index.suffix`
@@ -170,6 +179,16 @@ Settings related to node discovery are:
 
 Node discovery can be disabled by setting `discover.interval` to 0.
 
+## Exporting metrics
+
+Metrics support is currently in development.
+The only metric types supported are:
+
+- Gauge
+- Sum
+
+Other metric types (Histogram, Exponential Histogram, Summary) are ignored.
+
 [confighttp]: https://github.com/open-telemetry/opentelemetry-collector/tree/main/config/confighttp/README.md#http-configuration-settings
 [configtls]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configtls/README.md#tls-configuration-settings
 [configauth]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/config/configauth/README.md#authentication-configuration

exporter/elasticsearchexporter/attribute.go

@@ -17,6 +17,7 @@ type attrGetter interface {
 }
 
 // retrieve attribute out of resource, scope, and record (span or log, if not found in resource)
+// Deprecated: Use getFromAttributesNew instead.
 func getFromAttributes(name string, resource, scope, record attrGetter) string {
 	var str string
 	val, exist := resource.Attributes().Get(name)
@@ -37,3 +38,12 @@ func getFromAttributes(name string, resource, scope, record attrGetter) string {
 	}
 	return str
 }
+
+func getFromAttributesNew(name string, defaultValue string, attributeMaps ...pcommon.Map) string {
+	for _, attributeMap := range attributeMaps {
+		if value, exists := attributeMap.Get(name); exists {
+			return value.AsString()
+		}
+	}
+	return defaultValue
+}

exporter/elasticsearchexporter/config.go

@@ -47,6 +47,12 @@ type Config struct {
 	LogsIndex string `mapstructure:"logs_index"`
 	// fall back to pure LogsIndex, if 'elasticsearch.index.prefix' or 'elasticsearch.index.suffix' are not found in resource or attribute (prio: resource > attribute)
 	LogsDynamicIndex DynamicIndexSetting `mapstructure:"logs_dynamic_index"`
+
+	// This setting is required when the exporter is used in a metrics pipeline.
+	MetricsIndex string `mapstructure:"metrics_index"`
+	// fall back to pure MetricsIndex, if 'elasticsearch.index.prefix' or 'elasticsearch.index.suffix' are not found in resource attributes
+	MetricsDynamicIndex DynamicIndexSetting `mapstructure:"metrics_dynamic_index"`
+
 	// This setting is required when traces pipelines used.
 	TracesIndex string `mapstructure:"traces_index"`
 	// fall back to pure TracesIndex, if 'elasticsearch.index.prefix' or 'elasticsearch.index.suffix' are not found in resource or attribute (prio: resource > attribute)

exporter/elasticsearchexporter/config_test.go

@@ -57,11 +57,12 @@ func TestConfig(t *testing.T) {
 					NumConsumers: exporterhelper.NewDefaultQueueSettings().NumConsumers,
 					QueueSize:    exporterhelper.NewDefaultQueueSettings().QueueSize,
 				},
-				Endpoints:   []string{"https://elastic.example.com:9200"},
-				Index:       "",
-				LogsIndex:   "logs-generic-default",
-				TracesIndex: "trace_index",
-				Pipeline:    "mypipeline",
+				Endpoints:    []string{"https://elastic.example.com:9200"},
+				Index:        "",
+				LogsIndex:    "logs-generic-default",
+				MetricsIndex: "metrics-generic-default",
+				TracesIndex:  "trace_index",
+				Pipeline:     "mypipeline",
 				ClientConfig: confighttp.ClientConfig{
 					Timeout:         2 * time.Minute,
 					MaxIdleConns:    &defaultMaxIdleConns,
@@ -109,11 +110,65 @@ func TestConfig(t *testing.T) {
 					NumConsumers: exporterhelper.NewDefaultQueueSettings().NumConsumers,
 					QueueSize:    exporterhelper.NewDefaultQueueSettings().QueueSize,
 				},
-				Endpoints:   []string{"http://localhost:9200"},
-				Index:       "",
-				LogsIndex:   "my_log_index",
-				TracesIndex: "traces-generic-default",
-				Pipeline:    "mypipeline",
+				Endpoints:    []string{"http://localhost:9200"},
+				Index:        "",
+				LogsIndex:    "my_log_index",
+				MetricsIndex: "metrics-generic-default",
+				TracesIndex:  "traces-generic-default",
+				Pipeline:     "mypipeline",
+				ClientConfig: confighttp.ClientConfig{
+					Timeout:         2 * time.Minute,
+					MaxIdleConns:    &defaultMaxIdleConns,
+					IdleConnTimeout: &defaultIdleConnTimeout,
+					Headers: map[string]configopaque.String{
+						"myheader": "test",
+					},
+				},
+				Authentication: AuthenticationSettings{
+					User:     "elastic",
+					Password: "search",
+					APIKey:   "AvFsEiPs==",
+				},
+				Discovery: DiscoverySettings{
+					OnStart: true,
+				},
+				Flush: FlushSettings{
+					Bytes: 10485760,
+				},
+				Retry: RetrySettings{
+					Enabled:         true,
+					MaxRequests:     5,
+					InitialInterval: 100 * time.Millisecond,
+					MaxInterval:     1 * time.Minute,
+					RetryOnStatus:   []int{http.StatusTooManyRequests, http.StatusInternalServerError},
+				},
+				Mapping: MappingsSettings{
+					Mode:  "none",
+					Dedup: true,
+					Dedot: true,
+				},
+				LogstashFormat: LogstashFormatSettings{
+					Enabled:         false,
+					PrefixSeparator: "-",
+					DateFormat:      "%Y.%m.%d",
+				},
+			},
+		},
+		{
+			id:         component.NewIDWithName(metadata.Type, "metric"),
+			configFile: "config.yaml",
+			expected: &Config{
+				QueueSettings: exporterhelper.QueueSettings{
+					Enabled:      true,
+					NumConsumers: exporterhelper.NewDefaultQueueSettings().NumConsumers,
+					QueueSize:    exporterhelper.NewDefaultQueueSettings().QueueSize,
+				},
+				Endpoints:    []string{"http://localhost:9200"},
+				Index:        "",
+				LogsIndex:    "logs-generic-default",
+				MetricsIndex: "my_metric_index",
+				TracesIndex:  "traces-generic-default",
+				Pipeline:     "mypipeline",
 				ClientConfig: confighttp.ClientConfig{
 					Timeout:         2 * time.Minute,
 					MaxIdleConns:    &defaultMaxIdleConns,

exporter/elasticsearchexporter/exporter.go

@@ -14,6 +14,7 @@ import (
 	"go.opentelemetry.io/collector/exporter"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.opentelemetry.io/collector/pdata/ptrace"
 )
 
@@ -132,11 +133,69 @@ func (e *elasticsearchExporter) pushLogRecord(ctx context.Context, resource pcom
 
 	document, err := e.model.encodeLog(resource, record, scope)
 	if err != nil {
-		return fmt.Errorf("Failed to encode log event: %w", err)
+		return fmt.Errorf("failed to encode log event: %w", err)
 	}
 	return pushDocuments(ctx, fIndex, document, e.bulkIndexer)
 }
 
+func (e *elasticsearchExporter) pushMetricsData(
+	ctx context.Context,
+	metrics pmetric.Metrics,
+) error {
+	var errs []error
+
+	resourceMetrics := metrics.ResourceMetrics()
+	for i := 0; i < resourceMetrics.Len(); i++ {
+		resourceMetric := resourceMetrics.At(i)
+		resource := resourceMetric.Resource()
+		scopeMetrics := resourceMetric.ScopeMetrics()
+		for j := 0; j < scopeMetrics.Len(); j++ {
+			scope := scopeMetrics.At(j).Scope()
+			metricSlice := scopeMetrics.At(j).Metrics()
+
+			if err := e.pushMetricSlice(ctx, resource, metricSlice, scope); err != nil {
+				if ctxErr := ctx.Err(); ctxErr != nil {
+					return ctxErr
+				}
+
+				errs = append(errs, err)
+			}
+
+		}
+	}
+
+	return errors.Join(errs...)
+}
+
+func (e *elasticsearchExporter) pushMetricSlice(
+	ctx context.Context,
+	resource pcommon.Resource,
+	slice pmetric.MetricSlice,
+	scope pcommon.InstrumentationScope,
+) error {
+	fIndex := e.index
+	if e.dynamicIndex {
+		prefix := getFromAttributesNew(indexPrefix, "", resource.Attributes())
+		suffix := getFromAttributesNew(indexSuffix, "", resource.Attributes())
+
+		fIndex = fmt.Sprintf("%s%s%s", prefix, fIndex, suffix)
+	}
+
+	documents, err := e.model.encodeMetrics(resource, slice, scope)
+	if err != nil {
+		return fmt.Errorf("failed to encode a metric event: %w", err)
+	}
+
+	for _, document := range documents {
+		err := pushDocuments(ctx, fIndex, document, e.bulkIndexer)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func (e *elasticsearchExporter) pushTraceData(
 	ctx context.Context,
 	td ptrace.Traces,
@@ -185,7 +244,7 @@ func (e *elasticsearchExporter) pushTraceRecord(ctx context.Context, resource pc
 
 	document, err := e.model.encodeSpan(resource, span, scope)
 	if err != nil {
-		return fmt.Errorf("Failed to encode trace record: %w", err)
+		return fmt.Errorf("failed to encode trace record: %w", err)
 	}
 	return pushDocuments(ctx, fIndex, document, e.bulkIndexer)
 }

exporter/elasticsearchexporter/exporter_test.go

@@ -25,7 +25,9 @@ import (
 	"go.opentelemetry.io/collector/exporter"
 	"go.opentelemetry.io/collector/exporter/exportertest"
 	"go.opentelemetry.io/collector/extension/auth/authtest"
+	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.opentelemetry.io/collector/pdata/ptrace"
 )
 
@@ -449,6 +451,26 @@ func TestExporterLogs(t *testing.T) {
 	})
 }
 
+func TestExporterMetrics(t *testing.T) {
+	t.Run("publish with success", func(t *testing.T) {
+		rec := newBulkRecorder()
+		server := newESTestServer(t, func(docs []itemRequest) ([]itemResponse, error) {
+			rec.Record(docs)
+			return itemsAllOK(docs)
+		})
+
+		exporter := newTestMetricsExporter(t, server.URL)
+		dp := pmetric.NewNumberDataPoint()
+		dp.SetDoubleValue(123.456)
+		dp.SetTimestamp(pcommon.NewTimestampFromTime(time.Now()))
+		mustSendMetricSumDataPoints(t, exporter, dp)
+		mustSendMetricGaugeDataPoints(t, exporter, dp)
+
+		rec.WaitItems(2)
+	})
+
+}
+
 func TestExporterTraces(t *testing.T) {
 	t.Run("publish with success", func(t *testing.T) {
 		rec := newBulkRecorder()
@@ -634,6 +656,24 @@ func newTestTracesExporter(t *testing.T, url string, fns ...func(*Config)) expor
 	return exp
 }
 
+func newTestMetricsExporter(t *testing.T, url string, fns ...func(*Config)) exporter.Metrics {
+	f := NewFactory()
+	cfg := withDefaultConfig(append([]func(*Config){func(cfg *Config) {
+		cfg.Endpoints = []string{url}
+		cfg.NumWorkers = 1
+		cfg.Flush.Interval = 10 * time.Millisecond
+	}}, fns...)...)
+	exp, err := f.CreateMetricsExporter(context.Background(), exportertest.NewNopSettings(), cfg)
+	require.NoError(t, err)
+
+	err = exp.Start(context.Background(), componenttest.NewNopHost())
+	require.NoError(t, err)
+	t.Cleanup(func() {
+		require.NoError(t, exp.Shutdown(context.Background()))
+	})
+	return exp
+}
+
 func newTestLogsExporter(t *testing.T, url string, fns ...func(*Config)) exporter.Logs {
 	exp := newUnstartedTestLogsExporter(t, url, fns...)
 	err := exp.Start(context.Background(), componenttest.NewNopHost())
@@ -671,6 +711,35 @@ func mustSendLogs(t *testing.T, exporter exporter.Logs, logs plog.Logs) {
 	require.NoError(t, err)
 }
 
+func mustSendMetricSumDataPoints(t *testing.T, exporter exporter.Metrics, dataPoints ...pmetric.NumberDataPoint) {
+	metrics := pmetric.NewMetrics()
+	scopeMetrics := metrics.ResourceMetrics().AppendEmpty().ScopeMetrics().AppendEmpty()
+	for _, dataPoint := range dataPoints {
+		metric := scopeMetrics.Metrics().AppendEmpty()
+		metric.SetEmptySum()
+		metric.SetName("sum")
+		dataPoint.CopyTo(metric.Sum().DataPoints().AppendEmpty())
+	}
+	mustSendMetrics(t, exporter, metrics)
+}
+
+func mustSendMetricGaugeDataPoints(t *testing.T, exporter exporter.Metrics, dataPoints ...pmetric.NumberDataPoint) {
+	metrics := pmetric.NewMetrics()
+	scopeMetrics := metrics.ResourceMetrics().AppendEmpty().ScopeMetrics().AppendEmpty()
+	for _, dataPoint := range dataPoints {
+		metric := scopeMetrics.Metrics().AppendEmpty()
+		metric.SetEmptyGauge()
+		metric.SetName("gauge")
+		dataPoint.CopyTo(metric.Gauge().DataPoints().AppendEmpty())
+	}
+	mustSendMetrics(t, exporter, metrics)
+}
+
+func mustSendMetrics(t *testing.T, exporter exporter.Metrics, metrics pmetric.Metrics) {
+	err := exporter.ConsumeMetrics(context.Background(), metrics)
+	require.NoError(t, err)
+}
+
 func mustSendSpans(t *testing.T, exporter exporter.Traces, spans ...ptrace.Span) {
 	traces := ptrace.NewTraces()
 	resourceSpans := traces.ResourceSpans().AppendEmpty()