cmd/dnsupdater/main.go: Adding logging

cmd/dnsupdater/main.go

@@ -1,47 +1,61 @@
 package main
 
 import (
-	"fmt"
 	"os"
+	"time"
 
 	"dnsupdater/app"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 )
 
 func main() {
+	log.Logger = log.Output(zerolog.ConsoleWriter{
+		Out:        os.Stderr,
+		TimeFormat: time.RFC3339,
+	})
+
 	config, err := app.LoadConfig("config.yml")
 	if err != nil {
-		fmt.Println("Failed to load config:", err)
-		os.Exit(1)
+		log.Fatal().Err(err).Msg("Failed to load config")
 	}
 
 	app, err := app.NewApp(config)
 	if err != nil {
-		fmt.Println("Failed to initialize application:", err)
-		os.Exit(1)
+		log.Fatal().Err(err).Msg("Failed to initialize application")
 	}
 
-	for service, domains := range config.Updates {
-		fmt.Println("Service", service)
+	for service_name, domains := range config.Updates {
+
+		log.Info().Str("service", service_name).Msg("Begin update for service")
 
 		// Get service
-		service := app.ProviderManager.Get(service)
+		service := app.ProviderManager.Get(service_name)
 
 		for domain, records := range domains {
-			fmt.Println("  ", "Domain", domain)
-			fmt.Println("  ", "Records")
 			for name, data := range records {
 
+				logger := log.With().
+					Str("service", service_name).
+					Str("domain", domain).
+					Str("record", name).
+					Str("interface", data).
+					Logger()
+
 				ip, err := app.GetIP(data)
 				if err != nil {
-					fmt.Println(err)
+					logger.Error().Err(err).Msg("Failed to fetch ip")
 					continue
 				}
 
-				fmt.Println("    Update: ", name, data, ip)
+				logger = logger.With().IPAddr("ip", ip).Logger()
 
 				err = service.Update(domain, name, ip)
 				if err != nil {
-					fmt.Println("Error", err)
+					logger.Error().Err(err).Msg("Failed to update record")
+				} else {
+					logger.Info().Msg("Record updated")
 				}
 			}
 		}