disable http/2 by default, enable it if needed

cmd/descheduler/app/options/options.go

@@ -44,6 +44,7 @@ type DeschedulerServer struct {
 	EventClient    clientset.Interface
 	SecureServing  *apiserveroptions.SecureServingOptionsWithLoopback
 	DisableMetrics bool
+	EnableHTTP2    bool
 }
 
 // NewDeschedulerServer creates a new DeschedulerServer with default parameters
@@ -101,6 +102,7 @@ func (rs *DeschedulerServer) AddFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&rs.Tracing.ServiceNamespace, "otel-trace-namespace", "", "OTEL Trace namespace to be used with the resources")
 	fs.Float64Var(&rs.Tracing.SampleRate, "otel-sample-rate", 1.0, "Sample rate to collect the Traces")
 	fs.BoolVar(&rs.Tracing.FallbackToNoOpProviderOnError, "otel-fallback-no-op-on-error", false, "Fallback to NoOp Tracer in case of error")
+	fs.BoolVar(&rs.EnableHTTP2, "enable-http2", false, "If http/2 should be enabled for the metrics and health check")
 
 	componentbaseoptions.BindLeaderElectionFlags(&rs.LeaderElection, fs)
 

cmd/descheduler/app/server.go

@@ -65,6 +65,8 @@ func NewDeschedulerCommand(out io.Writer) *cobra.Command {
 				return
 			}
 
+			SecureServing.DisableHTTP2 = !s.EnableHTTP2
+
 			var factory registry.LogFormatFactory
 			if s.Logging.Format == "json" {
 				factory = jsonLog.Factory{}

docs/cli/descheduler.md

@@ -21,6 +21,7 @@ descheduler [flags]
       --descheduling-interval duration           Time interval between two consecutive descheduler executions. Setting this value instructs the descheduler to run in a continuous loop at the interval specified.
       --disable-metrics                          Disables metrics. The metrics are by default served through https://localhost:10258/metrics. Secure address, resp. port can be changed through --bind-address, resp. --secure-port flags.
       --dry-run                                  Execute descheduler in dry run mode.
+      --enable-http2                             If http/2 should be enabled for the metrics and health check
   -h, --help                                     help for descheduler
       --http2-max-streams-per-connection int     The limit that the server gives to clients for the maximum number of streams in an HTTP/2 connection. Zero means to use golang's default.
       --kubeconfig string                        File with kube configuration. Deprecated, use client-connection-kubeconfig instead.