[exporter/elasticsearch] Add mapping.mode: raw configuration option

.chloggen/exp-es-omit-attributes-prefix.yaml

@@ -0,0 +1,33 @@
+# 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: elasticsearchexporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add `mapping.mode: raw` configuration option"
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [26647]
+
+# (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: |
+  Setting `mapping.mode: raw` in the Elasticsearch exporter's configuration
+  will result logs and traces being indexed into Elasticsearch with their
+  attribute fields directly at the root level of the document instead inside an
+  `Attributes` object. Similarly, this setting will also result in traces being
+  indexed into Elasticsearch with their event fields directly at the root level
+  of the document instead of inside an `Events` object.
+
+# 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

@@ -68,6 +68,9 @@ This exporter supports sending OpenTelemetry logs to [Elasticsearch](https://www
     - `ecs`: Try to map fields defined in the
              [OpenTelemetry Semantic Conventions](https://github.com/open-telemetry/semantic-conventions)
              to [Elastic Common Schema (ECS)](https://www.elastic.co/guide/en/ecs/current/index.html).
+    - `raw`: Omit the `Attributes.` string prefixed to field names for log and 
+             span attributes as well as omit the `Events.` string prefixed to
+             field names for span events. 
   - `fields` (optional): Configure additional fields mappings.
   - `file` (optional): Read additional field mappings from the provided YAML file.
   - `dedup` (default=true): Try to find and remove duplicate fields/attributes

exporter/elasticsearchexporter/config.go

@@ -175,6 +175,7 @@ type MappingMode int
 const (
 	MappingNone MappingMode = iota
 	MappingECS
+	MappingRaw
 )
 
 var (
@@ -188,6 +189,8 @@ func (m MappingMode) String() string {
 		return ""
 	case MappingECS:
 		return "ecs"
+	case MappingRaw:
+		return "raw"
 	default:
 		return ""
 	}
@@ -198,6 +201,7 @@ var mappingModes = func() map[string]MappingMode {
 	for _, m := range []MappingMode{
 		MappingNone,
 		MappingECS,
+		MappingRaw,
 	} {
 		table[strings.ToLower(m.String())] = m
 	}
@@ -231,3 +235,10 @@ func (cfg *Config) Validate() error {
 
 	return nil
 }
+
+// MappingMode returns the mapping.mode defined in the given cfg
+// object. This method must be called after cfg.Validate() has been
+// called without returning an error.
+func (cfg *Config) MappingMode() MappingMode {
+	return mappingModes[cfg.Mapping.Mode]
+}

exporter/elasticsearchexporter/config_test.go

@@ -85,6 +85,10 @@ func TestLoadConfig(t *testing.T) {
 	defaultLogstashFormatCfg.(*Config).Endpoints = []string{"http://localhost:9200"}
 	defaultLogstashFormatCfg.(*Config).LogstashFormat.Enabled = true
 
+	defaultRawCfg := createDefaultConfig()
+	defaultRawCfg.(*Config).Endpoints = []string{"http://localhost:9200"}
+	defaultRawCfg.(*Config).Mapping.Mode = "raw"
+
 	tests := []struct {
 		configFile string
 		id         component.ID
@@ -200,6 +204,11 @@ func TestLoadConfig(t *testing.T) {
 			configFile: "config.yaml",
 			expected:   defaultLogstashFormatCfg,
 		},
+		{
+			id:         component.NewIDWithName(metadata.Type, "raw"),
+			configFile: "config.yaml",
+			expected:   defaultRawCfg,
+		},
 	}
 
 	for _, tt := range tests {

exporter/elasticsearchexporter/logs_exporter.go

@@ -53,7 +53,11 @@ func newLogsExporter(logger *zap.Logger, cfg *Config) (*elasticsearchLogsExporte
 		maxAttempts = cfg.Retry.MaxRequests
 	}
 
-	model := &encodeModel{dedup: cfg.Mapping.Dedup, dedot: cfg.Mapping.Dedot}
+	model := &encodeModel{
+		dedup: cfg.Mapping.Dedup,
+		dedot: cfg.Mapping.Dedot,
+		mode:  cfg.MappingMode(),
+	}
 
 	indexStr := cfg.LogsIndex
 	if cfg.Index != "" {

exporter/elasticsearchexporter/logs_exporter_test.go

@@ -122,7 +122,7 @@ func TestExporter_New(t *testing.T) {
 				cfg.Mapping.Dedot = false
 				cfg.Mapping.Dedup = true
 			}),
-			want: successWithInternalModel(&encodeModel{dedot: false, dedup: true}),
+			want: successWithInternalModel(&encodeModel{dedot: false, dedup: true, mode: MappingECS}),
 		},
 	}
 

exporter/elasticsearchexporter/model.go

@@ -30,6 +30,7 @@ type mappingModel interface {
 type encodeModel struct {
 	dedup bool
 	dedot bool
+	mode  MappingMode
 }
 
 const (
@@ -47,7 +48,7 @@ func (m *encodeModel) encodeLog(resource pcommon.Resource, record plog.LogRecord
 	document.AddString("SeverityText", record.SeverityText())
 	document.AddInt("SeverityNumber", int64(record.SeverityNumber()))
 	document.AddAttribute("Body", record.Body())
-	document.AddAttributes("Attributes", record.Attributes())
+	m.encodeAttributes(&document, record.Attributes())
 	document.AddAttributes("Resource", resource.Attributes())
 	document.AddAttributes("Scope", scopeToAttributes(scope))
 
@@ -74,9 +75,9 @@ func (m *encodeModel) encodeSpan(resource pcommon.Resource, span ptrace.Span, sc
 	document.AddInt("TraceStatus", int64(span.Status().Code()))
 	document.AddString("TraceStatusDescription", span.Status().Message())
 	document.AddString("Link", spanLinksToString(span.Links()))
-	document.AddAttributes("Attributes", span.Attributes())
+	m.encodeAttributes(&document, span.Attributes())
 	document.AddAttributes("Resource", resource.Attributes())
-	document.AddEvents("Events", span.Events())
+	m.encodeEvents(&document, span.Events())
 	document.AddInt("Duration", durationAsMicroseconds(span.StartTimestamp().AsTime(), span.EndTimestamp().AsTime())) // unit is microseconds
 	document.AddAttributes("Scope", scopeToAttributes(scope))
 
@@ -91,6 +92,22 @@ func (m *encodeModel) encodeSpan(resource pcommon.Resource, span ptrace.Span, sc
 	return buf.Bytes(), err
 }
 
+func (m *encodeModel) encodeAttributes(document *objmodel.Document, attributes pcommon.Map) {
+	key := "Attributes"
+	if m.mode == MappingRaw {
+		key = ""
+	}
+	document.AddAttributes(key, attributes)
+}
+
+func (m *encodeModel) encodeEvents(document *objmodel.Document, events ptrace.SpanEventSlice) {
+	key := "Events"
+	if m.mode == MappingRaw {
+		key = ""
+	}
+	document.AddEvents(key, events)
+}
+
 func spanLinksToString(spanLinkSlice ptrace.SpanLinkSlice) string {
 	linkArray := make([]map[string]any, 0, spanLinkSlice.Len())
 	for i := 0; i < spanLinkSlice.Len(); i++ {

exporter/elasticsearchexporter/model_test.go

@@ -4,13 +4,17 @@
 package elasticsearchexporter
 
 import (
+	"fmt"
 	"testing"
 	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	"go.opentelemetry.io/collector/pdata/ptrace"
 	semconv "go.opentelemetry.io/collector/semconv/v1.18.0"
+
+	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/elasticsearchexporter/internal/objmodel"
 )
 
 var expectedSpanBody = `{"@timestamp":"2023-04-19T03:04:05.000000006Z","Attributes.service.instance.id":"23","Duration":1000000,"EndTimestamp":"2023-04-19T03:04:06.000000006Z","Events.fooEvent.evnetMockBar":"bar","Events.fooEvent.evnetMockFoo":"foo","Events.fooEvent.time":"2023-04-19T03:04:05.000000006Z","Kind":"SPAN_KIND_CLIENT","Link":"[{\"attribute\":{},\"spanID\":\"\",\"traceID\":\"01020304050607080807060504030200\"}]","Name":"client span","Resource.cloud.platform":"aws_elastic_beanstalk","Resource.cloud.provider":"aws","Resource.deployment.environment":"BETA","Resource.service.instance.id":"23","Resource.service.name":"some-service","Resource.service.version":"env-version-1234","Scope.lib-foo":"lib-bar","Scope.name":"io.opentelemetry.rabbitmq-2.7","Scope.version":"1.30.0-alpha","SpanId":"1920212223242526","TraceId":"01020304050607080807060504030201","TraceStatus":2,"TraceStatusDescription":"Test"}`
@@ -63,3 +67,110 @@ func mockResourceSpans() ptrace.Traces {
 	event.Attributes().PutStr("evnetMockBar", "bar")
 	return traces
 }
+
+func TestEncodeAttributes(t *testing.T) {
+	t.Parallel()
+
+	attributes := pcommon.NewMap()
+	err := attributes.FromRaw(map[string]any{
+		"s": "baz",
+		"o": map[string]any{
+			"sub_i": 19,
+		},
+	})
+	require.NoError(t, err)
+
+	tests := map[string]struct {
+		mappingMode MappingMode
+		want        func() objmodel.Document
+	}{
+		"raw": {
+			mappingMode: MappingRaw,
+			want: func() objmodel.Document {
+				return objmodel.DocumentFromAttributes(attributes)
+			},
+		},
+		"none": {
+			mappingMode: MappingNone,
+			want: func() objmodel.Document {
+				doc := objmodel.Document{}
+				doc.AddAttributes("Attributes", attributes)
+				return doc
+			},
+		},
+		"ecs": {
+			mappingMode: MappingECS,
+			want: func() objmodel.Document {
+				doc := objmodel.Document{}
+				doc.AddAttributes("Attributes", attributes)
+				return doc
+			},
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			m := encodeModel{
+				mode: test.mappingMode,
+			}
+
+			doc := objmodel.Document{}
+			m.encodeAttributes(&doc, attributes)
+			require.Equal(t, test.want(), doc)
+		})
+	}
+}
+
+func TestEncodeEvents(t *testing.T) {
+	t.Parallel()
+
+	events := ptrace.NewSpanEventSlice()
+	events.EnsureCapacity(4)
+	for i := 0; i < 4; i++ {
+		event := events.AppendEmpty()
+		event.SetTimestamp(pcommon.NewTimestampFromTime(time.Now().Add(time.Duration(i) * time.Minute)))
+		event.SetName(fmt.Sprintf("event_%d", i))
+	}
+
+	tests := map[string]struct {
+		mappingMode MappingMode
+		want        func() objmodel.Document
+	}{
+		"raw": {
+			mappingMode: MappingRaw,
+			want: func() objmodel.Document {
+				doc := objmodel.Document{}
+				doc.AddEvents("", events)
+				return doc
+			},
+		},
+		"none": {
+			mappingMode: MappingNone,
+			want: func() objmodel.Document {
+				doc := objmodel.Document{}
+				doc.AddEvents("Events", events)
+				return doc
+			},
+		},
+		"ecs": {
+			mappingMode: MappingECS,
+			want: func() objmodel.Document {
+				doc := objmodel.Document{}
+				doc.AddEvents("Events", events)
+				return doc
+			},
+		},
+	}
+
+	for name, test := range tests {
+		t.Run(name, func(t *testing.T) {
+			m := encodeModel{
+				mode: test.mappingMode,
+			}
+
+			doc := objmodel.Document{}
+			m.encodeEvents(&doc, events)
+			require.Equal(t, test.want(), doc)
+		})
+	}
+}

exporter/elasticsearchexporter/testdata/config.yaml

@@ -44,3 +44,7 @@ elasticsearch/logstash_format:
   endpoints: [http://localhost:9200]
   logstash_format:
     enabled: true
+elasticsearch/raw:
+  endpoints: [http://localhost:9200]
+  mapping:
+    mode: raw

exporter/elasticsearchexporter/trace_exporter.go

@@ -49,7 +49,11 @@ func newTracesExporter(logger *zap.Logger, cfg *Config) (*elasticsearchTracesExp
 		maxAttempts = cfg.Retry.MaxRequests
 	}
 
-	model := &encodeModel{dedup: cfg.Mapping.Dedup, dedot: cfg.Mapping.Dedot}
+	model := &encodeModel{
+		dedup: cfg.Mapping.Dedup,
+		dedot: cfg.Mapping.Dedot,
+		mode:  cfg.MappingMode(),
+	}
 
 	return &elasticsearchTracesExporter{
 		logger:      logger,

exporter/elasticsearchexporter/traces_exporter_test.go

@@ -99,7 +99,7 @@ func TestTracesExporter_New(t *testing.T) {
 				cfg.Mapping.Dedot = false
 				cfg.Mapping.Dedup = true
 			}),
-			want: successWithInternalModel(&encodeModel{dedot: false, dedup: true}),
+			want: successWithInternalModel(&encodeModel{dedot: false, dedup: true, mode: MappingECS}),
 		},
 	}