remove unncessary errors.Unwrap calls

Signed-off-by: Gyuho Lee <[email protected]>

Author: gyuho

pkg/kubelet/server/stats/summary_sys_containers.go

@@ -83,7 +83,7 @@ func (sp *summaryProviderImpl) GetSystemContainersCPUAndMemoryStats(nodeConfig c
 		}
 		s, err := sp.provider.GetCgroupCPUAndMemoryStats(cont.name, cont.forceStatsUpdate)
 		if err != nil {
-			if errors.Is(errors.Unwrap(err), cadvisormemory.ErrDataNotFound) {
+			if errors.Is(err, cadvisormemory.ErrDataNotFound) {
 				klog.V(4).InfoS("cgroup stats not found in memory cache", "containerName", cont.name)
 			} else {
 				klog.ErrorS(err, "Failed to get system container stats", "containerName", cont.name)

pkg/kubelet/stats/provider.go

@@ -115,7 +115,7 @@ func (p *Provider) RlimitStats() (*statsapi.RlimitStats, error) {
 func (p *Provider) GetCgroupStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, *statsapi.NetworkStats, error) {
 	info, err := getCgroupInfo(p.cadvisor, cgroupName, updateStats)
 	if err != nil {
-		if errors.Is(errors.Unwrap(err), cadvisormemory.ErrDataNotFound) {
+		if errors.Is(err, cadvisormemory.ErrDataNotFound) {
 			return nil, nil, fmt.Errorf("cgroup stats not found for %q: %w", cgroupName, cadvisormemory.ErrDataNotFound)
 		}
 		return nil, nil, fmt.Errorf("failed to get cgroup stats for %q: %v", cgroupName, err)
@@ -131,7 +131,7 @@ func (p *Provider) GetCgroupStats(cgroupName string, updateStats bool) (*statsap
 func (p *Provider) GetCgroupCPUAndMemoryStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, error) {
 	info, err := getCgroupInfo(p.cadvisor, cgroupName, updateStats)
 	if err != nil {
-		if errors.Is(errors.Unwrap(err), cadvisormemory.ErrDataNotFound) {
+		if errors.Is(err, cadvisormemory.ErrDataNotFound) {
 			return nil, fmt.Errorf("cgroup stats not found for %q: %w", cgroupName, cadvisormemory.ErrDataNotFound)
 		}
 		return nil, fmt.Errorf("failed to get cgroup stats for %q: %v", cgroupName, err)