only print stacktraces on panics, as the trace for reconciling errors…

… is pretty much useless

On-behalf-of: @SAP christoph.mewes@sap.com

cmd/main.go

@@ -23,6 +23,7 @@ import (
 
 	certmanagerv1 "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
 	"github.com/go-logr/zapr"
+	"go.uber.org/zap/zapcore"
 
 	"k8s.io/apimachinery/pkg/runtime"
 	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
@@ -71,7 +72,8 @@ func main() {
 	flag.BoolVar(&enableHTTP2, "enable-http2", false,
 		"If set, HTTP/2 will be enabled for the metrics and webhook servers")
 	opts := zap.Options{
-		Development: true,
+		Development:     true,
+		StacktraceLevel: zapcore.PanicLevel,
 	}
 	opts.BindFlags(flag.CommandLine)
 	flag.Parse()