chore(tfstated): prepare for listening on a second port

cmd/tfstated/main.go

@@ -30,17 +30,21 @@ func run(
 		return err
 	}
 
-	httpServer := backend.Run(ctx, db, getenv, stderr)
+	backend := backend.Run(ctx, db, getenv, stderr)
+
+	<-ctx.Done()
+	shutdownCtx := context.Background()
+	shutdownCtx, shutdownCancel := context.WithTimeout(shutdownCtx, 10*time.Second)
+	defer shutdownCancel()
+
 	var wg sync.WaitGroup
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		<-ctx.Done()
+		if err := backend.Shutdown(shutdownCtx); err != nil {
-		shutdownCtx := context.Background()
+			slog.Error("error shutting down backend http server", "error", err)
-		shutdownCtx, cancel := context.WithTimeout(shutdownCtx, 10*time.Second)
+		}
-		defer cancel()
+	}()
-		if err := httpServer.Shutdown(shutdownCtx); err != nil {
-			_, _ = fmt.Fprintf(stderr, "error shutting down http server: %+v\n", err)
 		}
 	}()
 	wg.Wait()

cmd/tfstated/main_test.go

@@ -15,7 +15,7 @@ import (
 )
 
 var baseURI = url.URL{
-	Host:   "127.0.0.1:8081",
+	Host:   "127.0.0.1:8082",
 	Path:   "/",
 	Scheme: "http",
 }
@@ -31,7 +31,7 @@ func TestMain(m *testing.M) {
 		case "TFSTATED_HOST":
 			return "127.0.0.1"
 		case "TFSTATED_PORT":
-			return "8081"
+			return "8082"
 		case "VERSIONS_HISTORY_LIMIT":
 			return "3"
 		default:
@@ -59,7 +59,7 @@ func TestMain(m *testing.M) {
 		getenv,
 		os.Stderr,
 	)
-	err = waitForReady(ctx, 5*time.Second, "http://127.0.0.1:8081/healthz")
+	err = waitForReady(ctx, 5*time.Second, "http://127.0.0.1:8082/healthz")
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "%+v\n", err)
 		os.Exit(1)

pkg/backend/run.go

@@ -2,9 +2,8 @@ package backend
 
 import (
 	"context"
-	"fmt"
 	"io"
-	"log"
+	"log/slog"
 	"net"
 	"net/http"
 
@@ -41,9 +40,9 @@ func Run(
 		Handler: logger.Middleware(mux, false),
 	}
 	go func() {
-		log.Printf("listening on %s\n", httpServer.Addr)
+		slog.Info("backend http server listening", "address", httpServer.Addr)
 		if err := httpServer.ListenAndServe(); err != nil && err != http.ErrServerClosed {
-			_, _ = fmt.Fprintf(stderr, "error listening and serving: %+v\n", err)
+			slog.Error("error listening and serving backend http server", "address", httpServer.Addr, "error", err)
 		}
 	}()