fix function NodeAllocatableRoot

Author: mysunshine92

cmd/kubelet/app/server.go

@@ -608,8 +608,8 @@ func run(s *options.KubeletServer, kubeDeps *kubelet.Dependencies, featureGate f
 	}
 
 	var cgroupRoots []string
-
-	cgroupRoots = append(cgroupRoots, cm.NodeAllocatableRoot(s.CgroupRoot, s.CgroupDriver))
+	nodeAllocatableRoot := cm.NodeAllocatableRoot(s.CgroupRoot, s.CgroupsPerQOS, s.CgroupDriver)
+	cgroupRoots = append(cgroupRoots, nodeAllocatableRoot)
 	kubeletCgroup, err := cm.GetKubeletContainer(s.KubeletCgroups)
 	if err != nil {
 		klog.Warningf("failed to get the kubelet's cgroup: %v.  Kubelet system container metrics may be missing.", err)

pkg/kubelet/cm/helpers_linux.go

@@ -238,9 +238,11 @@ func GetPodCgroupNameSuffix(podUID types.UID) string {
 }
 
 // NodeAllocatableRoot returns the literal cgroup path for the node allocatable cgroup
-func NodeAllocatableRoot(cgroupRoot, cgroupDriver string) string {
-	root := ParseCgroupfsToCgroupName(cgroupRoot)
-	nodeAllocatableRoot := NewCgroupName(root, defaultNodeAllocatableCgroupName)
+func NodeAllocatableRoot(cgroupRoot string, cgroupsPerQOS bool, cgroupDriver string) string {
+	nodeAllocatableRoot := ParseCgroupfsToCgroupName(cgroupRoot)
+	if cgroupsPerQOS {
+		nodeAllocatableRoot = NewCgroupName(nodeAllocatableRoot, defaultNodeAllocatableCgroupName)
+	}
 	if libcontainerCgroupManagerType(cgroupDriver) == libcontainerSystemd {
 		return nodeAllocatableRoot.ToSystemd()
 	}

pkg/kubelet/cm/helpers_unsupported.go

@@ -61,7 +61,7 @@ func GetPodCgroupNameSuffix(podUID types.UID) string {
 }
 
 // NodeAllocatableRoot returns the literal cgroup path for the node allocatable cgroup
-func NodeAllocatableRoot(cgroupRoot, cgroupDriver string) string {
+func NodeAllocatableRoot(cgroupRoot string, cgroupsPerQOS bool, cgroupDriver string) string {
 	return ""
 }