[exporter/googlepubsub] expose Endpoint and Insecure

expose `Endpoint` and `Insecure` in configuration

fixes: open-telemetry#29304

.chloggen/googlecloudpubsubexporter-expose-insecure.yaml

@@ -0,0 +1,11 @@
+# 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: googlecloudpubsubexporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Expose `Endpoint` and `Insecure` in configuration.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [29304]

exporter/googlecloudpubsubexporter/README.md

@@ -28,6 +28,11 @@ The following configuration options are supported:
   the smallest timestamp of all the messages.
   * `allow_drift` (Optional): The maximum difference the `ce-time` attribute can be set from the system clock. When the
   drift is set to 0, the maximum drift from the clock is allowed (only applicable to `earliest`).
+* `endpoint` (Optional): Override the default Pubsub Endpoint, useful when connecting to the PubSub emulator instance
+  or switching between [global and regional service endpoints](https://cloud.google.com/pubsub/docs/reference/service_apis_overview#service_endpoints).
+* `insecure` (Optional): allows performing “insecure” SSL connections and transfers, useful when connecting to a local
+  emulator instance. Only has effect if Endpoint is not ""
+
 ```yaml
 exporters:
   googlecloudpubsub:

exporter/googlecloudpubsubexporter/config.go

@@ -22,10 +22,10 @@ type Config struct {
 	ProjectID string `mapstructure:"project"`
 	// User agent that will be used by the Pubsub client to connect to the service
 	UserAgent string `mapstructure:"user_agent"`
-	// Override of the Pubsub endpoint, for testing only
-	endpoint string
+	// Override of the Pubsub Endpoint, leave empty for the default endpoint
+	Endpoint string `mapstructure:"endpoint"`
 	// Only has effect if Endpoint is not ""
-	insecure bool
+	Insecure bool `mapstructure:"insecure"`
 
 	// The fully qualified resource name of the Pubsub topic
 	Topic string `mapstructure:"topic"`

exporter/googlecloudpubsubexporter/exporter.go

@@ -94,16 +94,16 @@ func (ex *pubsubExporter) generateClientOptions() (copts []option.ClientOption)
 	if ex.userAgent != "" {
 		copts = append(copts, option.WithUserAgent(ex.userAgent))
 	}
-	if ex.config.endpoint != "" {
-		if ex.config.insecure {
+	if ex.config.Endpoint != "" {
+		if ex.config.Insecure {
 			var dialOpts []grpc.DialOption
 			if ex.userAgent != "" {
 				dialOpts = append(dialOpts, grpc.WithUserAgent(ex.userAgent))
 			}
-			conn, _ := grpc.Dial(ex.config.endpoint, append(dialOpts, grpc.WithTransportCredentials(insecure.NewCredentials()))...)
+			conn, _ := grpc.Dial(ex.config.Endpoint, append(dialOpts, grpc.WithTransportCredentials(insecure.NewCredentials()))...)
 			copts = append(copts, option.WithGRPCConn(conn))
 		} else {
-			copts = append(copts, option.WithEndpoint(ex.config.endpoint))
+			copts = append(copts, option.WithEndpoint(ex.config.Endpoint))
 		}
 	}
 	return copts

exporter/googlecloudpubsubexporter/exporter_test.go

@@ -31,9 +31,9 @@ func TestGenerateClientOptions(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	exporterConfig := cfg.(*Config)
-	exporterConfig.endpoint = srv.Addr
+	exporterConfig.Endpoint = srv.Addr
 	exporterConfig.UserAgent = "test-user-agent"
-	exporterConfig.insecure = true
+	exporterConfig.Insecure = true
 	exporterConfig.ProjectID = "my-project"
 	exporterConfig.Topic = "projects/my-project/topics/otlp"
 	exporterConfig.TimeoutSettings = exporterhelper.TimeoutSettings{
@@ -44,7 +44,7 @@ func TestGenerateClientOptions(t *testing.T) {
 	options := exporter.generateClientOptions()
 	assert.Equal(t, option.WithUserAgent("test-user-agent"), options[0])
 
-	exporter.config.insecure = false
+	exporter.config.Insecure = false
 	options = exporter.generateClientOptions()
 	assert.Equal(t, option.WithUserAgent("test-user-agent"), options[0])
 	assert.Equal(t, option.WithEndpoint(srv.Addr), options[1])
@@ -63,8 +63,8 @@ func TestExporterDefaultSettings(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	exporterConfig := cfg.(*Config)
-	exporterConfig.endpoint = srv.Addr
-	exporterConfig.insecure = true
+	exporterConfig.Endpoint = srv.Addr
+	exporterConfig.Insecure = true
 	exporterConfig.ProjectID = "my-project"
 	exporterConfig.Topic = "projects/my-project/topics/otlp"
 	exporterConfig.TimeoutSettings = exporterhelper.TimeoutSettings{
@@ -91,9 +91,9 @@ func TestExporterCompression(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	exporterConfig := cfg.(*Config)
-	exporterConfig.endpoint = srv.Addr
+	exporterConfig.Endpoint = srv.Addr
 	exporterConfig.UserAgent = "test-user-agent"
-	exporterConfig.insecure = true
+	exporterConfig.Insecure = true
 	exporterConfig.ProjectID = "my-project"
 	exporterConfig.Topic = "projects/my-project/topics/otlp"
 	exporterConfig.TimeoutSettings = exporterhelper.TimeoutSettings{

exporter/googlecloudpubsubexporter/factory_test.go

@@ -31,7 +31,7 @@ func TestCreateTracesExporter(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	eCfg := cfg.(*Config)
-	eCfg.endpoint = "http://testing.invalid"
+	eCfg.Endpoint = "http://testing.invalid"
 
 	te, err := factory.CreateTracesExporter(
 		context.Background(),
@@ -46,7 +46,7 @@ func TestCreateMetricsExporter(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	eCfg := cfg.(*Config)
-	eCfg.endpoint = "http://testing.invalid"
+	eCfg.Endpoint = "http://testing.invalid"
 
 	me, err := factory.CreateMetricsExporter(
 		context.Background(),
@@ -61,7 +61,7 @@ func TestLogsCreateExporter(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	eCfg := cfg.(*Config)
-	eCfg.endpoint = "http://testing.invalid"
+	eCfg.Endpoint = "http://testing.invalid"
 
 	me, err := factory.CreateLogsExporter(
 		context.Background(),
@@ -76,7 +76,7 @@ func TestEnsureExporter(t *testing.T) {
 	factory := NewFactory()
 	cfg := factory.CreateDefaultConfig()
 	eCfg := cfg.(*Config)
-	eCfg.endpoint = "http://testing.invalid"
+	eCfg.Endpoint = "http://testing.invalid"
 
 	exporter1 := ensureExporter(exportertest.NewNopCreateSettings(), eCfg)
 	exporter2 := ensureExporter(exportertest.NewNopCreateSettings(), eCfg)