[exporter/datadog] Send host metadata on change, refactor main host m…

…etadata sending (#25145)

**Description:** 

- [\*/datadog] Bump opentelemetry-mapping-go/\* to v0.7.1
- [exporter/datadog] Use reporter for exporter host as well

.chloggen/mx-psi_inframetadata-base-reporter.yaml

@@ -0,0 +1,28 @@
+# 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: datadogexporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Host metadata for remote hosts is now reported on first sight or on change
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [25145]
+
+# (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: | 
+  Host metadata for remote hosts will only be sent for payloads with the datadog.host.use_as_metadata resource attribute.
+
+# 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: [user]

exporter/datadogexporter/factory.go

@@ -246,7 +246,7 @@ func (f *factory) createMetricsExporter(
 				if md.ResourceMetrics().Len() > 0 {
 					attrs = md.ResourceMetrics().At(0).Resource().Attributes()
 				}
-				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs)
+				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs, metadataReporter)
 			})
 
 			// Consume resources for host metadata
@@ -331,7 +331,7 @@ func (f *factory) createTracesExporter(
 				if td.ResourceSpans().Len() > 0 {
 					attrs = td.ResourceSpans().At(0).Resource().Attributes()
 				}
-				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs)
+				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs, metadataReporter)
 			})
 			// Consume resources for host metadata
 			for i := 0; i < td.ResourceSpans().Len(); i++ {
@@ -402,7 +402,7 @@ func (f *factory) createLogsExporter(
 		pusher = func(_ context.Context, td plog.Logs) error {
 			f.onceMetadata.Do(func() {
 				attrs := pcommon.NewMap()
-				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs)
+				go hostmetadata.RunPusher(ctx, set, pcfg, hostProvider, attrs, metadataReporter)
 			})
 			for i := 0; i < td.ResourceLogs().Len(); i++ {
 				res := td.ResourceLogs().At(i).Resource()

exporter/datadogexporter/internal/hostmetadata/metadata.go

@@ -150,12 +150,11 @@ func NewPusher(params exporter.CreateSettings, pcfg PusherConfig) inframetadata.
 
 // RunPusher to push host metadata payloads from the host where the Collector is running periodically to Datadog intake.
 // This function is blocking and it is meant to be run on a goroutine.
-func RunPusher(ctx context.Context, params exporter.CreateSettings, pcfg PusherConfig, p source.Provider, attrs pcommon.Map) {
+func RunPusher(ctx context.Context, params exporter.CreateSettings, pcfg PusherConfig, p source.Provider, attrs pcommon.Map, reporter *inframetadata.Reporter) {
 	// Push metadata every 30 minutes
 	ticker := time.NewTicker(30 * time.Minute)
 	defer ticker.Stop()
 	defer params.Logger.Debug("Shut down host metadata routine")
-	pusher := NewPusher(params, pcfg)
 
 	// Get host metadata from resources and fill missing info using our exporter.
 	// Currently we only retrieve it once but still send the same payload
@@ -169,23 +168,18 @@ func RunPusher(ctx context.Context, params exporter.CreateSettings, pcfg PusherC
 		hostMetadata = metadataFromAttributes(attrs)
 	}
 	fillHostMetadata(params, pcfg, p, &hostMetadata)
-
-	// Run one first time at startup
-	if err := pusher.Push(ctx, hostMetadata); err != nil {
-		params.Logger.Warn("Initial host metadata failed", zap.Error(err))
-	} else {
-		params.Logger.Info("Sent initial host metadata")
+	// Consume one first time
+	if err := reporter.ConsumeHostMetadata(hostMetadata); err != nil {
+		params.Logger.Warn("Failed to consume host metadata", zap.Any("payload", hostMetadata))
 	}
 
 	for {
 		select {
 		case <-ctx.Done():
 			return
-		case <-ticker.C: // Send host metadata
-			if err := pusher.Push(ctx, hostMetadata); err != nil {
-				params.Logger.Warn("Sending host metadata failed", zap.Error(err))
-			} else {
-				params.Logger.Info("Sent host metadata")
+		case <-ticker.C:
+			if err := reporter.ConsumeHostMetadata(hostMetadata); err != nil {
+				params.Logger.Warn("Failed to consume host metadata", zap.Any("payload", hostMetadata))
 			}
 		}
 	}

exporter/datadogexporter/internal/hostmetadata/metadata_test.go

@@ -11,7 +11,9 @@ import (
 	"net/http/httptest"
 	"os"
 	"testing"
+	"time"
 
+	"github.com/DataDog/opentelemetry-mapping-go/pkg/inframetadata"
 	"github.com/DataDog/opentelemetry-mapping-go/pkg/inframetadata/payload"
 	"github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes"
 	"github.com/DataDog/opentelemetry-mapping-go/pkg/otlp/attributes/azure"
@@ -23,6 +25,7 @@ import (
 	"go.opentelemetry.io/collector/exporter/exportertest"
 	"go.opentelemetry.io/collector/pdata/pcommon"
 	conventions "go.opentelemetry.io/collector/semconv/v1.6.1"
+	"go.uber.org/zap"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/datadogexporter/internal/testutil"
 )
@@ -229,7 +232,7 @@ func TestPusher(t *testing.T) {
 	params := exportertest.NewNopCreateSettings()
 	params.BuildInfo = mockBuildInfo
 
-	hostProvider, err := GetSourceProvider(componenttest.NewNopTelemetrySettings(), "")
+	hostProvider, err := GetSourceProvider(componenttest.NewNopTelemetrySettings(), "source-hostname")
 	require.NoError(t, err)
 
 	attrs := testutil.NewAttributeMap(map[string]string{
@@ -242,7 +245,11 @@ func TestPusher(t *testing.T) {
 	defer server.Close()
 	pcfg.MetricsEndpoint = server.URL
 
-	go RunPusher(ctx, params, pcfg, hostProvider, attrs)
+	pusher := NewPusher(mockExporterCreateSettings, pcfg)
+	reporter, err := inframetadata.NewReporter(zap.NewNop(), pusher, 1*time.Second)
+	require.NoError(t, err)
+
+	go RunPusher(ctx, params, pcfg, hostProvider, attrs, reporter)
 
 	body := <-server.MetadataChan
 	var recvMetadata payload.HostMetadata

exporter/datadogexporter/logs_exporter.go

@@ -93,7 +93,7 @@ func (exp *logsExporter) consumeLogs(_ context.Context, ld plog.Logs) (err error
 			if ld.ResourceLogs().Len() > 0 {
 				attrs = ld.ResourceLogs().At(0).Resource().Attributes()
 			}
-			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs)
+			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs, exp.metadataReporter)
 		})
 
 		// Consume resources for host metadata

exporter/datadogexporter/metrics_exporter.go

@@ -190,7 +190,7 @@ func (exp *metricsExporter) PushMetricsData(ctx context.Context, md pmetric.Metr
 			if md.ResourceMetrics().Len() > 0 {
 				attrs = md.ResourceMetrics().At(0).Resource().Attributes()
 			}
-			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs)
+			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs, exp.metadataReporter)
 		})
 
 		// Consume resources for host metadata

exporter/datadogexporter/traces_exporter.go

@@ -103,7 +103,7 @@ func (exp *traceExporter) consumeTraces(
 			if td.ResourceSpans().Len() > 0 {
 				attrs = td.ResourceSpans().At(0).Resource().Attributes()
 			}
-			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs)
+			go hostmetadata.RunPusher(exp.ctx, exp.params, newMetadataConfigfromConfig(exp.cfg), exp.sourceProvider, attrs, exp.metadataReporter)
 		})
 
 		// Consume resources for host metadata