[extension/jaegerremotesampling] jaegerremotesampling adopts component.UseLocalHostAsDefaultHost feature gate (open-telemetry#30983)

Description:
jaegerremotesampling extension adopts
component.UseLocalHostAsDefaultHost feature gate

Link to tracking Issue:

open-telemetry#30702

Fixes
open-telemetry#30982

Documentation:
Updated docs.

Co-authored-by: Pablo Baeyens <[email protected]>

Author: 2 people

.chloggen/mx-psi_internal-localhostgate.yaml

@@ -27,6 +27,7 @@ subtext: |
     - receiver/influxdb
     - receiver/zookeeper
     - receiver/signalfx
+    - extension/jaegerremotesampling
     - receiver/jaeger
     - receiver/skywalking
 

extension/jaegerremotesampling/README.md

@@ -17,8 +17,11 @@
 This extension allows serving sampling strategies following the Jaeger's remote sampling API. This extension can be configured to proxy requests to a backing remote sampling server, which could potentially be a Jaeger Collector down the pipeline, or a static JSON file from the local file system.
 
 By default, two listeners are made available:
-- `localhost:5778`, following the legacy remote sampling endpoint as defined by Jaeger
-- `localhost:14250`, following the gRPC remote sampling endpoint, also defined by Jaeger
+- `0.0.0.0:5778`, following the legacy remote sampling endpoint as defined by Jaeger
+- `0.0.0.0:14250`, following the gRPC remote sampling endpoint, also defined by Jaeger
+
+The `component.UseLocalHostAsDefaultHost` feature gate changes this to localhost:9943. This will become the default in a future release.
+
 
 Note that the port `14250` will clash with the Jaeger Receiver. When both are used, it's recommended to change this extension to use another port.
 

extension/jaegerremotesampling/config_test.go

@@ -29,9 +29,9 @@ func TestLoadConfig(t *testing.T) {
 		{
 			id: component.NewID(metadata.Type),
 			expected: &Config{
-				HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: ":5778"},
+				HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: "0.0.0.0:5778"},
 				GRPCServerSettings: &configgrpc.GRPCServerSettings{NetAddr: confignet.NetAddr{
-					Endpoint:  ":14250",
+					Endpoint:  "0.0.0.0:14250",
 					Transport: "tcp",
 				}},
 				Source: Source{
@@ -44,9 +44,9 @@ func TestLoadConfig(t *testing.T) {
 		{
 			id: component.NewIDWithName(metadata.Type, "1"),
 			expected: &Config{
-				HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: ":5778"},
+				HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: "0.0.0.0:5778"},
 				GRPCServerSettings: &configgrpc.GRPCServerSettings{NetAddr: confignet.NetAddr{
-					Endpoint:  ":14250",
+					Endpoint:  "0.0.0.0:14250",
 					Transport: "tcp",
 				}},
 				Source: Source{

extension/jaegerremotesampling/factory.go

@@ -16,6 +16,7 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/extension/jaegerremotesampling/internal/metadata"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/internal/common/localhostgate"
 )
 
 // NewFactory creates a factory for the jaeger remote sampling extension.
@@ -31,11 +32,11 @@ func NewFactory() extension.Factory {
 func createDefaultConfig() component.Config {
 	return &Config{
 		HTTPServerConfig: &confighttp.HTTPServerConfig{
-			Endpoint: ":5778",
+			Endpoint: localhostgate.EndpointForPort(5778),
 		},
 		GRPCServerSettings: &configgrpc.GRPCServerSettings{
 			NetAddr: confignet.NetAddr{
-				Endpoint:  ":14250",
+				Endpoint:  localhostgate.EndpointForPort(14250),
 				Transport: "tcp",
 			},
 		},

extension/jaegerremotesampling/factory_test.go

@@ -18,9 +18,9 @@ import (
 func TestCreateDefaultConfig(t *testing.T) {
 	// prepare and test
 	expected := &Config{
-		HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: ":5778"},
+		HTTPServerConfig: &confighttp.HTTPServerConfig{Endpoint: "0.0.0.0:5778"},
 		GRPCServerSettings: &configgrpc.GRPCServerSettings{NetAddr: confignet.NetAddr{
-			Endpoint:  ":14250",
+			Endpoint:  "0.0.0.0:14250",
 			Transport: "tcp",
 		}},
 	}

extension/jaegerremotesampling/go.mod

@@ -5,6 +5,7 @@ go 1.20
 require (
 	github.com/fortytw2/leaktest v1.3.0
 	github.com/jaegertracing/jaeger v1.53.0
+	github.com/open-telemetry/opentelemetry-collector-contrib/internal/common v0.93.0
 	github.com/stretchr/testify v1.8.4
 	github.com/tilinna/clock v1.1.0
 	go.opentelemetry.io/collector/component v0.93.1-0.20240130182548-89388addcc7f
@@ -90,3 +91,5 @@ retract (
 	v0.76.1
 	v0.65.0
 )
+
+replace github.com/open-telemetry/opentelemetry-collector-contrib/internal/common => ../../internal/common