rebase: update controller-runtime package to v0.9.2

This commit updates controller-runtime to v0.9.2 and
makes changes in persistentvolume.go to add context to
various functions and function calls made here instead of
context.TODO().

Signed-off-by: Rakshith R <rar@redhat.com>

vendor/sigs.k8s.io/controller-runtime/pkg/log/warning_handler.go

@@ -0,0 +1,76 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package log
+
+import (
+	"sync"
+
+	"github.com/go-logr/logr"
+)
+
+// KubeAPIWarningLoggerOptions controls the behavior
+// of a rest.WarningHandler constructed using NewKubeAPIWarningLogger().
+type KubeAPIWarningLoggerOptions struct {
+	// Deduplicate indicates a given warning message should only be written once.
+	// Setting this to true in a long-running process handling many warnings can
+	// result in increased memory use.
+	Deduplicate bool
+}
+
+// KubeAPIWarningLogger is a wrapper around
+// a provided logr.Logger that implements the
+// rest.WarningHandler interface.
+type KubeAPIWarningLogger struct {
+	// logger is used to log responses with the warning header
+	logger logr.Logger
+	// opts contain options controlling warning output
+	opts KubeAPIWarningLoggerOptions
+	// writtenLock gurads written
+	writtenLock sync.Mutex
+	// used to keep track of already logged messages
+	// and help in de-duplication.
+	written map[string]struct{}
+}
+
+// HandleWarningHeader handles logging for responses from API server that are
+// warnings with code being 299 and uses a logr.Logger for it's logging purposes.
+func (l *KubeAPIWarningLogger) HandleWarningHeader(code int, agent string, message string) {
+	if code != 299 || len(message) == 0 {
+		return
+	}
+
+	if l.opts.Deduplicate {
+		l.writtenLock.Lock()
+		defer l.writtenLock.Unlock()
+
+		if _, alreadyLogged := l.written[message]; alreadyLogged {
+			return
+		}
+		l.written[message] = struct{}{}
+	}
+	l.logger.Info(message)
+}
+
+// NewKubeAPIWarningLogger returns an implementation of rest.WarningHandler that logs warnings
+// with code = 299 to the provided logr.Logger.
+func NewKubeAPIWarningLogger(l logr.Logger, opts KubeAPIWarningLoggerOptions) *KubeAPIWarningLogger {
+	h := &KubeAPIWarningLogger{logger: l, opts: opts}
+	if opts.Deduplicate {
+		h.written = map[string]struct{}{}
+	}
+	return h
+}