docs: fixes rideshare example

Author: petethepig

examples/golang-push/rideshare/main.go

@@ -47,16 +47,6 @@ func index(w http.ResponseWriter, r *http.Request) {
 
 func main() {
 	config := rideshare.ReadConfig()
-	config.AppName = os.Getenv("PYROSCOPE_APPLICATION_NAME")
-	if config.AppName == "" {
-		config.AppName = "ride-sharing-app"
-	}
-	hostname, err := os.Hostname()
-	if err == nil {
-		config.Tags = map[string]string{
-			"hostname": hostname,
-		}
-	}
 
 	tp, _ := setupOTEL(config)
 	defer func() {

examples/golang-push/rideshare/rideshare/rideshare.go

@@ -76,8 +76,16 @@ type Config struct {
 }
 
 func ReadConfig() Config {
+	appName := os.Getenv("PYROSCOPE_APPLICATION_NAME")
+	if appName == "" {
+		appName = "ride-sharing-app"
+	}
+	hostname, err := os.Hostname()
+	if err != nil {
+		hostname = "unknown"
+	}
 	c := Config{
-		AppName:                    os.Getenv("PYROSCOPE_APPLICATION_NAME"),
+		AppName:                    appName,
 		PyroscopeServerAddress:     os.Getenv("PYROSCOPE_SERVER_ADDRESS"),
 		PyroscopeBasicAuthUser:     os.Getenv("PYROSCOPE_BASIC_AUTH_USER"),
 		PyroscopeBasicAuthPassword: os.Getenv("PYROSCOPE_BASIC_AUTH_PASSWORD"),
@@ -91,7 +99,8 @@ func ReadConfig() Config {
 		UseDebugTracer: os.Getenv("DEBUG_TRACER") == "1",
 		UseDebugLogger: os.Getenv("DEBUG_LOGGER") == "1",
 		Tags: map[string]string{
-			"region": os.Getenv("REGION"),
+			"region":   os.Getenv("REGION"),
+			"hostname": hostname,
 		},
 
 		ParametersPoolSize: envIntOrDefault("PARAMETERS_POOL_SIZE", 1000),