Custom resource definition

Co-authored-by: Mathieu Lonjaret <mathieu.lonjaret@gmail.com>

vendor/k8s.io/apimachinery/pkg/util/runtime/runtime.go

@@ -43,7 +43,7 @@ var PanicHandlers = []func(interface{}){logPanic}
 // TODO: remove this function. We are switching to a world where it's safe for
 // apiserver to panic, since it will be restarted by kubelet. At the beginning
 // of the Kubernetes project, nothing was going to restart apiserver and so
-// catching panics was important. But it's actually much simpler for montoring
+// catching panics was important. But it's actually much simpler for monitoring
 // software if we just exit when an unexpected panic happens.
 func HandleCrash(additionalHandlers ...func(interface{})) {
 	if r := recover(); r != nil {
@@ -63,7 +63,11 @@ func HandleCrash(additionalHandlers ...func(interface{})) {
 // logPanic logs the caller tree when a panic occurs.
 func logPanic(r interface{}) {
 	callers := getCallers(r)
-	glog.Errorf("Observed a panic: %#v (%v)\n%v", r, r, callers)
+	if _, ok := r.(string); ok {
+		glog.Errorf("Observed a panic: %s\n%v", r, callers)
+	} else {
+		glog.Errorf("Observed a panic: %#v (%v)\n%v", r, r, callers)
+	}
 }
 
 func getCallers(r interface{}) string {
@@ -128,9 +132,8 @@ func (r *rudimentaryErrorBackoff) OnError(error) {
 	r.lastErrorTimeLock.Lock()
 	defer r.lastErrorTimeLock.Unlock()
 	d := time.Since(r.lastErrorTime)
-	if d < r.minPeriod && d >= 0 {
+	if d < r.minPeriod {
 		// If the time moves backwards for any reason, do nothing
-		// TODO: remove check "d >= 0" after go 1.8 is no longer supported
 		time.Sleep(r.minPeriod - d)
 	}
 	r.lastErrorTime = time.Now()
@@ -161,3 +164,10 @@ func RecoverFromPanic(err *error) {
 			callers)
 	}
 }
+
+// Must panics on non-nil errors.  Useful to handling programmer level errors.
+func Must(err error) {
+	if err != nil {
+		panic(err)
+	}
+}