Remove TLS support

We don't need this for now. It was only added recently to the CTFE and
got ported over here. In an effort to splify this binary to its bare
minimum, let's remove this for now. We can always add it back later if
required.

Author: phbnf

cmd/gcp/main.go

@@ -17,7 +17,6 @@ package main
 
 import (
 	"context"
-	"crypto/tls"
 	"flag"
 	"fmt"
 	"net/http"
@@ -52,8 +51,6 @@ var (
 	notAfterLimit timestampFlag
 
 	httpEndpoint       = flag.String("http_endpoint", "localhost:6962", "Endpoint for HTTP (host:port).")
-	tlsCert            = flag.String("tls_certificate", "", "Path to server TLS certificate.")
-	tlsKey             = flag.String("tls_key", "", "Path to server TLS private key.")
 	metricsEndpoint    = flag.String("metrics_endpoint", "", "Endpoint for serving metrics; if left empty, metrics will be visible on --http_endpoint.")
 	tesseraDeadline    = flag.Duration("tessera_deadline", time.Second*10, "Deadline for Tessera requests.")
 	maskInternalErrors = flag.Bool("mask_internal_errors", false, "Don't return error strings with Internal Server Error HTTP responses.")
@@ -165,20 +162,7 @@ func main() {
 	}
 
 	// Bring up the HTTP server and serve until we get a signal not to.
-	srv := http.Server{}
-	if *tlsCert != "" && *tlsKey != "" {
-		cert, err := tls.LoadX509KeyPair(*tlsCert, *tlsKey)
-		if err != nil {
-			klog.Errorf("failed to load TLS certificate/key: %v", err)
-		}
-		tlsConfig := &tls.Config{
-			Certificates: []tls.Certificate{cert},
-			MinVersion:   tls.VersionTLS12,
-		}
-		srv = http.Server{Addr: *httpEndpoint, Handler: handler, TLSConfig: tlsConfig}
-	} else {
-		srv = http.Server{Addr: *httpEndpoint, Handler: handler}
-	}
+	srv := http.Server{Addr: *httpEndpoint, Handler: handler}
 	shutdownWG := new(sync.WaitGroup)
 	go awaitSignal(func() {
 		shutdownWG.Add(1)
@@ -194,14 +178,7 @@ func main() {
 		klog.Info("HTTP server shutdown")
 	})
 
-	if *tlsCert != "" && *tlsKey != "" {
-		err = srv.ListenAndServeTLS("", "")
-	} else {
-		err = srv.ListenAndServe()
-	}
-	if err != http.ErrServerClosed {
-		klog.Warningf("Server exited: %v", err)
-	}
+	err = srv.ListenAndServe()
 	// Wait will only block if the function passed to awaitSignal was called,
 	// in which case it'll block until the HTTP server has gracefully shutdown
 	shutdownWG.Wait()