[OTEL-2125] Add E2E test for no dd exporter case

cmd/otel-agent/subcommands/run/command.go

@@ -25,6 +25,7 @@ import (
 	"github.com/DataDog/datadog-agent/comp/core/hostname/hostnameinterface"
 	"github.com/DataDog/datadog-agent/comp/core/hostname/remotehostnameimpl"
 	log "github.com/DataDog/datadog-agent/comp/core/log/def"
+	logfx "github.com/DataDog/datadog-agent/comp/core/log/fx"
 	logtracefx "github.com/DataDog/datadog-agent/comp/core/log/fx-trace"
 	"github.com/DataDog/datadog-agent/comp/core/secrets"
 	tagger "github.com/DataDog/datadog-agent/comp/core/tagger/def"
@@ -106,8 +107,20 @@ func runOTelAgentCommand(ctx context.Context, params *subcommands.GlobalParams,
 			fx.Provide(func() coreconfig.Component {
 				return acfg
 			}),
+			fx.Provide(func(_ coreconfig.Component) log.Params {
+				return log.ForDaemon(params.LoggerName, "log_file", pkgconfigsetup.DefaultOTelAgentLogFile)
+			}),
+			logfx.Module(),
+			fetchonlyimpl.Module(),
+			// TODO: don't rely on this pattern; remove this `OptionalModuleWithParams` thing
+			//       and instead adapt OptionalModule to allow parameter passing naturally.
+			//       See: https://github.com/DataDog/datadog-agent/pull/28386
+			configsyncimpl.OptionalModuleWithParams(),
+			fx.Provide(func() configsyncimpl.Params {
+				return configsyncimpl.NewParams(params.SyncTimeout, params.SyncDelay, true)
+			}),
 			converterfx.Module(),
-			fx.Provide(func(cp converter.Component) confmap.Converter {
+			fx.Provide(func(cp converter.Component, _ optional.Option[configsync.Component]) confmap.Converter {
 				return cp
 			}),
 			collectorcontribFx.Module(),

comp/otelcol/ddflareextension/impl/server.go

@@ -116,7 +116,7 @@ func newServer(endpoint string, handler http.Handler, auth bool) (*server, error
 	// no easy way currently to pass required bearer auth token to OSS collector;
 	// skip the validation if running inside a separate collector
 	// TODO: determine way to allow OSS collector to authenticate with agent, OTEL-2226
-	if auth {
+	if auth && util.GetAuthToken() != "" {
 		r.Use(validateToken)
 	}
 

test/new-e2e/tests/otel/otel-agent/config/no-dd-exporter.yml

@@ -0,0 +1,23 @@
+receivers:
+  otlp:
+    protocols:
+      grpc:
+         endpoint: 0.0.0.0:4317
+      http:
+         endpoint: 0.0.0.0:4318
+
+exporters:
+  debug:
+    verbosity: detailed
+
+service:
+  pipelines:
+    traces:
+      receivers: [otlp]
+      exporters: [debug]
+    metrics:
+      receivers: [otlp]
+      exporters: [debug]
+    logs:
+      receivers: [otlp]
+      exporters: [debug]

test/new-e2e/tests/otel/otel-agent/minimal_test.go

@@ -32,8 +32,8 @@ var minimalProvidedConfig string
 //go:embed testdata/minimal-full-config.yml
 var minimalFullConfig string
 
-//go:embed testdata/minimal-sources.json
-var minimalSources string
+//go:embed testdata/sources.json
+var sources string
 
 func TestOTelAgentMinimal(t *testing.T) {
 	values := `
@@ -82,7 +82,7 @@ func (s *minimalTestSuite) TestOTelAgentInstalled() {
 }
 
 func (s *minimalTestSuite) TestOTelFlareExtensionResponse() {
-	utils.TestOTelFlareExtensionResponse(s, minimalProvidedConfig, minimalFullConfig, minimalSources)
+	utils.TestOTelFlareExtensionResponse(s, minimalProvidedConfig, minimalFullConfig, sources)
 }
 
 func (s *minimalTestSuite) TestOTelFlareFiles() {

test/new-e2e/tests/otel/otel-agent/no_dd_exporter_test.go

@@ -0,0 +1,58 @@
+// Unless explicitly stated otherwise all files in this repository are licensed
+// under the Apache License Version 2.0.
+// This product includes software developed at Datadog (https://www.datadoghq.com/).
+// Copyright 2016-present Datadog, Inc.
+
+// Package otelagent contains e2e otel agent tests
+package otelagent
+
+import (
+	_ "embed"
+	"testing"
+
+	"github.com/DataDog/test-infra-definitions/components/datadog/kubernetesagentparams"
+
+	"github.com/DataDog/datadog-agent/test/new-e2e/pkg/e2e"
+	"github.com/DataDog/datadog-agent/test/new-e2e/pkg/environments"
+	awskubernetes "github.com/DataDog/datadog-agent/test/new-e2e/pkg/environments/aws/kubernetes"
+	"github.com/DataDog/datadog-agent/test/new-e2e/tests/otel/utils"
+)
+
+type noDDExporterTestSuite struct {
+	e2e.BaseSuite[environments.Kubernetes]
+}
+
+//go:embed config/no-dd-exporter.yml
+var noDDExporterConfig string
+
+//go:embed testdata/no-dd-exporter-provided-config.yml
+var noDDExporterProvidedConfig string
+
+//go:embed testdata/no-dd-exporter-full-config.yml
+var noDDExporterFullConfig string
+
+func TestOTelAgentWithNoDDExporter(t *testing.T) {
+	values := `
+datadog:
+  logs:
+    containerCollectAll: false
+    containerCollectUsingFiles: false
+`
+	t.Parallel()
+	e2e.Run(t, &noDDExporterTestSuite{},
+		e2e.WithProvisioner(
+			awskubernetes.KindProvisioner(
+				awskubernetes.WithAgentOptions(
+					kubernetesagentparams.WithHelmValues(values),
+					kubernetesagentparams.WithOTelAgent(),
+					kubernetesagentparams.WithOTelConfig(noDDExporterConfig),
+				))))
+}
+
+func (s *noDDExporterTestSuite) TestOTelAgentInstalled() {
+	utils.TestOTelAgentInstalled(s)
+}
+
+func (s *noDDExporterTestSuite) TestOTelFlareExtensionResponse() {
+	utils.TestOTelFlareExtensionResponse(s, noDDExporterProvidedConfig, noDDExporterFullConfig, sources)
+}