Drop native Let's Encrypt support (#4541)

cmd/server/server.go

@@ -25,7 +25,6 @@ import (
 	"strings"
 	"time"
 
-	"github.com/caddyserver/certmagic"
 	"github.com/gin-gonic/gin"
 	prometheus_http "github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/rs/zerolog"
@@ -167,8 +166,7 @@ func run(ctx context.Context, c *cli.Command) error {
 		middleware.Store(_store),
 	)
 
-	switch {
-	case c.String("server-cert") != "":
+	if c.String("server-cert") != "" {
 		// start the server with tls enabled
 		serviceWaitingGroup.Go(func() error {
 			tlsServer := &http.Server{
@@ -234,32 +232,7 @@ func run(ctx context.Context, c *cli.Command) error {
 			}
 			return nil
 		})
-	case c.Bool("lets-encrypt"):
-		// start the server with lets-encrypt
-		certmagic.DefaultACME.Email = c.String("lets-encrypt-email")
-		certmagic.DefaultACME.Agreed = true
-
-		address, err := url.Parse(strings.TrimSuffix(c.String("server-host"), "/"))
-		if err != nil {
-			return err
-		}
-
-		serviceWaitingGroup.Go(func() error {
-			go func() {
-				<-ctx.Done()
-				log.Error().Msg("there is no certmagic.HTTPS alternative who is context aware we will fail in 2 seconds")
-				time.Sleep(time.Second * 2)
-				log.Fatal().Msg("we kill certmagic by fail") //nolint:forbidigo
-			}()
-
-			log.Info().Msg("starting certmagic server ...")
-			if err := certmagic.HTTPS([]string{address.Host}, handler); err != nil {
-				log.Error().Err(err).Msg("certmagic does not work")
-				stopServerFunc(fmt.Errorf("certmagic failed: %w", err))
-			}
-			return nil
-		})
-	default:
+	} else {
 		// start the server without tls
 		serviceWaitingGroup.Go(func() error {
 			httpServer := &http.Server{