add lock in volume manager reconciler to avoid data race

Signed-off-by: Paco Xu <paco.xu@daocloud.io>

pkg/kubelet/volumemanager/reconciler/reconciler_common.go

@@ -18,6 +18,7 @@ package reconciler
 
 import (
 	"fmt"
+	"sync"
 	"time"
 
 	v1 "k8s.io/api/core/v1"
@@ -139,10 +140,12 @@ type reconciler struct {
 	volumePluginMgr               *volumepkg.VolumePluginMgr
 	skippedDuringReconstruction   map[v1.UniqueVolumeName]*globalVolumeInfo
 	kubeletPodsDir                string
-	timeOfLastSync                time.Time
-	volumesFailedReconstruction   []podVolume
-	volumesNeedDevicePath         []v1.UniqueVolumeName
-	volumesNeedReportedInUse      []v1.UniqueVolumeName
+	// lock protects timeOfLastSync for updating and checking
+	timeOfLastSyncLock          sync.Mutex
+	timeOfLastSync              time.Time
+	volumesFailedReconstruction []podVolume
+	volumesNeedDevicePath       []v1.UniqueVolumeName
+	volumesNeedReportedInUse    []v1.UniqueVolumeName
 }
 
 func (rc *reconciler) Run(stopCh <-chan struct{}) {

pkg/kubelet/volumemanager/reconciler/reconstruct_common.go

@@ -72,10 +72,14 @@ type globalVolumeInfo struct {
 }
 
 func (rc *reconciler) updateLastSyncTime() {
+	rc.timeOfLastSyncLock.Lock()
+	defer rc.timeOfLastSyncLock.Unlock()
 	rc.timeOfLastSync = time.Now()
 }
 
 func (rc *reconciler) StatesHasBeenSynced() bool {
+	rc.timeOfLastSyncLock.Lock()
+	defer rc.timeOfLastSyncLock.Unlock()
 	return !rc.timeOfLastSync.IsZero()
 }