✨ Config service

pkg/config/main.go

@@ -0,0 +1,133 @@
+package main
+
+import (
+	"fmt"
+	"hash/fnv"
+	"os"
+	"os/signal"
+	"strconv"
+	"strings"
+	"syscall"
+
+	"git.solsynth.dev/goatworks/turbine/pkg/shared/registrar"
+
+	"github.com/gofiber/fiber/v3"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+	"github.com/spf13/viper"
+)
+
+func hash(s string) uint32 {
+	h := fnv.New32a()
+	h.Write([]byte(s))
+	return h.Sum32()
+}
+
+func init() {
+	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
+}
+
+func main() {
+	log.Info().Msg("Starting Config Service...")
+	viper.SetConfigName("settings")
+	viper.AddConfigPath(".")
+	viper.SetConfigType("toml")
+
+	if err := viper.ReadInConfig(); err != nil {
+		log.Fatal().Err(err).Msg("Failed to read config file")
+	}
+	log.Info().Msg("Configuration loaded.")
+
+	// --- Service Registration ---
+	etcdEndpoints := viper.GetStringSlice("etcd.endpoints")
+	if len(etcdEndpoints) == 0 {
+		log.Fatal().Msg("etcd.endpoints not configured")
+	}
+
+	if viper.GetBool("etcd.insecure") {
+		for i, ep := range etcdEndpoints {
+			if !strings.HasPrefix(ep, "http://") && !strings.HasPrefix(ep, "https://") {
+				etcdEndpoints[i] = "http://" + ep
+			}
+		}
+	}
+
+	serviceReg, err := registrar.NewServiceRegistrar(etcdEndpoints)
+	if err != nil {
+		log.Fatal().Err(err).Msg("Failed to create service registrar")
+	}
+
+	listenAddr := viper.GetString("listen")
+	host := viper.GetString("host")
+	if host == "" {
+		log.Fatal().Msg("host not configured")
+	}
+	portStr := strings.TrimPrefix(listenAddr, ":")
+	port, err := strconv.Atoi(portStr)
+	if err != nil {
+		log.Fatal().Err(err).Msg("Invalid listen address")
+	}
+
+	serviceName := "config"
+	instanceID := fmt.Sprint(hash(fmt.Sprintf("%s-%s-%d", serviceName, host, port)))[:8]
+
+	err = serviceReg.Register(serviceName, "http", instanceID, host, port, 30)
+	if err != nil {
+		log.Fatal().Err(err).Msg("Failed to register service")
+	}
+	log.Info().Str("service", serviceName).Str("instanceID", instanceID).Msg("Service registered successfully")
+
+	// --- Web Server ---
+	app := fiber.New(fiber.Config{
+		ServerHeader: "Turbine Config",
+	})
+
+	// This is the main endpoint that serves the configuration as JSON.
+	app.Get("/", func(c fiber.Ctx) error {
+		log.Info().Msg("Serving shared configuration as JSON")
+
+		// Use a new Viper instance to read the shared config
+		v := viper.New()
+		v.SetConfigName("shared_config")
+		v.AddConfigPath(".") // Look in the current directory (pkg/config)
+		v.SetConfigType("toml")
+
+		if err := v.ReadInConfig(); err != nil {
+			log.Error().Err(err).Msg("Failed to read shared_config.toml")
+			return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
+				"error": "could not load configuration",
+			})
+		}
+
+		return c.JSON(v.AllSettings())
+	})
+
+	// Health check endpoint
+	app.Get("/health", func(c fiber.Ctx) error {
+		return c.SendString("Config service is running")
+	})
+
+	// --- Graceful Shutdown ---
+	go func() {
+		err := app.Listen(listenAddr, fiber.ListenConfig{DisableStartupMessage: true})
+		if err != nil {
+			log.Fatal().Err(err).Msg("Failed to start server")
+		}
+	}()
+	log.Info().Msg("Server is listening on " + listenAddr)
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	<-stop
+
+	log.Info().Msg("Shutting down service...")
+	if err := serviceReg.Deregister(); err != nil {
+		log.Error().Err(err).Msg("Failed to deregister service")
+	} else {
+		log.Info().Msg("Service deregistered successfully")
+	}
+
+	if err := app.Shutdown(); err != nil {
+		log.Error().Err(err).Msg("Error during server shutdown")
+	}
+}

pkg/config/settings.toml

@@ -0,0 +1,12 @@
+# The address the config service will listen on
+listen = ":8081"
+
+# The host address to register with etcd.
+# This should be the address that other services can use to reach this service.
+# For local testing, 127.0.0.1 is fine. In production, this should be a reachable IP.
+host = "127.0.0.1"
+
+# ETCD configuration for service registration
+[etcd]
+endpoints = ["etcd.orb.local:2379"]
+insecure = true

pkg/config/shared_config.toml

@@ -0,0 +1,5 @@
+[database]
+connection_string = "postgres://user:password@db-host:5432/mydatabase?sslmode=require"
+
+[redis]
+address = "redis-host:6379"