[receiver/otlp] Promote component.UseLocalHostAsDefaultHost to beta

.chloggen/mx-psi_enable-component-localhost-fgh.yaml

@@ -0,0 +1,26 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: otlpreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Switch to `localhost` as the default for all endpoints.
+
+# One or more tracking issues or pull requests related to the change
+issues: [8510]
+
+# (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: |
+  Disable the `component.UseLocalHostAsDefaultHost` feature gate to temporarily get the previous default.
+
+# 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: []

config/configgrpc/configgrpc_test.go

@@ -32,6 +32,8 @@ import (
 	"go.opentelemetry.io/collector/config/configtls"
 	"go.opentelemetry.io/collector/extension/auth"
 	"go.opentelemetry.io/collector/extension/auth/authtest"
+	"go.opentelemetry.io/collector/featuregate"
+	"go.opentelemetry.io/collector/internal/localhostgate"
 	"go.opentelemetry.io/collector/pdata/ptrace/ptraceotlp"
 )
 
@@ -437,6 +439,13 @@ func TestUseSecure(t *testing.T) {
 }
 
 func TestGRPCServerWarning(t *testing.T) {
+	prev := localhostgate.UseLocalHostAsDefaultHostfeatureGate.IsEnabled()
+	require.NoError(t, featuregate.GlobalRegistry().Set(localhostgate.UseLocalHostAsDefaultHostID, false))
+	defer func() {
+		// Restore previous value.
+		require.NoError(t, featuregate.GlobalRegistry().Set(localhostgate.UseLocalHostAsDefaultHostID, prev))
+	}()
+
 	tests := []struct {
 		name     string
 		settings ServerConfig

config/configgrpc/go.mod

@@ -15,6 +15,7 @@ require (
 	go.opentelemetry.io/collector/config/configtls v0.103.0
 	go.opentelemetry.io/collector/config/internal v0.103.0
 	go.opentelemetry.io/collector/extension/auth v0.103.0
+	go.opentelemetry.io/collector/featuregate v1.10.0
 	go.opentelemetry.io/collector/pdata v1.10.0
 	go.opentelemetry.io/collector/pdata/testdata v0.103.0
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0
@@ -51,7 +52,6 @@ require (
 	github.com/prometheus/procfs v0.15.0 // indirect
 	go.opentelemetry.io/collector/confmap v0.103.0 // indirect
 	go.opentelemetry.io/collector/extension v0.103.0 // indirect
-	go.opentelemetry.io/collector/featuregate v1.10.0 // indirect
 	go.opentelemetry.io/otel/exporters/prometheus v0.49.0 // indirect
 	go.opentelemetry.io/otel/metric v1.27.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.27.0 // indirect

config/confighttp/confighttp_test.go

@@ -33,6 +33,8 @@ import (
 	"go.opentelemetry.io/collector/config/configtls"
 	"go.opentelemetry.io/collector/extension/auth"
 	"go.opentelemetry.io/collector/extension/auth/authtest"
+	"go.opentelemetry.io/collector/featuregate"
+	"go.opentelemetry.io/collector/internal/localhostgate"
 )
 
 type customRoundTripper struct {
@@ -514,6 +516,13 @@ func TestHTTPServerSettingsError(t *testing.T) {
 }
 
 func TestHTTPServerWarning(t *testing.T) {
+	prev := localhostgate.UseLocalHostAsDefaultHostfeatureGate.IsEnabled()
+	require.NoError(t, featuregate.GlobalRegistry().Set(localhostgate.UseLocalHostAsDefaultHostID, false))
+	defer func() {
+		// Restore previous value.
+		require.NoError(t, featuregate.GlobalRegistry().Set(localhostgate.UseLocalHostAsDefaultHostID, prev))
+	}()
+
 	tests := []struct {
 		name     string
 		settings ServerConfig

config/confighttp/go.mod

@@ -16,6 +16,7 @@ require (
 	go.opentelemetry.io/collector/config/configtls v0.103.0
 	go.opentelemetry.io/collector/config/internal v0.103.0
 	go.opentelemetry.io/collector/extension/auth v0.103.0
+	go.opentelemetry.io/collector/featuregate v1.10.0
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.52.0
 	go.opentelemetry.io/otel v1.27.0
 	go.uber.org/goleak v1.3.0
@@ -46,7 +47,6 @@ require (
 	github.com/prometheus/procfs v0.15.0 // indirect
 	go.opentelemetry.io/collector/confmap v0.103.0 // indirect
 	go.opentelemetry.io/collector/extension v0.103.0 // indirect
-	go.opentelemetry.io/collector/featuregate v1.10.0 // indirect
 	go.opentelemetry.io/collector/pdata v1.10.0 // indirect
 	go.opentelemetry.io/otel/exporters/prometheus v0.49.0 // indirect
 	go.opentelemetry.io/otel/metric v1.27.0 // indirect

internal/localhostgate/featuregate.go

@@ -23,7 +23,7 @@
 var UseLocalHostAsDefaultHostfeatureGate = mustRegisterOrLoad(
 	featuregate.GlobalRegistry(),
 	UseLocalHostAsDefaultHostID,
-	featuregate.StageAlpha,
+	featuregate.StageBeta,
 	featuregate.WithRegisterDescription("controls whether server-like receivers and extensions such as the OTLP receiver use localhost as the default host for their endpoints"),
 )
 
@@ -60,8 +60,8 @@
 // LogAboutUseLocalHostAsDefault logs about the upcoming change from 0.0.0.0 to localhost on server-like components.
 func LogAboutUseLocalHostAsDefault(logger *zap.Logger) {
 	if !UseLocalHostAsDefaultHostfeatureGate.IsEnabled() {
-		logger.Warn(
-			"The default endpoints for all servers in components will change to use localhost instead of 0.0.0.0 in a future version. Use the feature gate to preview the new default.",
+		logger.Info(
+			"The default endpoints for all servers in components have changed to use localhost instead of 0.0.0.0. Use the feature gate to temporarily revert to the previous default.",
 			zap.String("feature gate ID", UseLocalHostAsDefaultHostID),
 		)
 	}

otelcol/testdata/otel-log-to-file.yaml

@@ -14,7 +14,7 @@ exporters:
 service:
   telemetry:
     logs:
-      level: warn
+      level: info
       output_paths:
         # The folder need to be created prior to starting the collector
         - ${ProgramData}\OpenTelemetry\Collector\Logs\otelcol.log

receiver/otlpreceiver/config_test.go

@@ -88,7 +88,7 @@ func TestUnmarshalConfig(t *testing.T) {
 			Protocols: Protocols{
 				GRPC: &configgrpc.ServerConfig{
 					NetAddr: confignet.AddrConfig{
-						Endpoint:  "0.0.0.0:4317",
+						Endpoint:  "localhost:4317",
 						Transport: confignet.TransportTypeTCP,
 					},
 					TLSSetting: &configtls.ServerConfig{
@@ -117,7 +117,7 @@ func TestUnmarshalConfig(t *testing.T) {
 				},
 				HTTP: &HTTPConfig{
 					ServerConfig: &confighttp.ServerConfig{
-						Endpoint: "0.0.0.0:4318",
+						Endpoint: "localhost:4318",
 						TLSSetting: &configtls.ServerConfig{
 							Config: configtls.Config{
 								CertFile: "test.crt",