type cadvisorUnsupported struct {
}

var _ Interface = new(cadvisorUnsupported)

// New creates a new cAdvisor Interface for unsupported systems.
func New(imageFsInfoProvider ImageFsInfoProvider, rootPath string, cgroupsRoots []string, usingLegacyStats, localStorageCapacityIsolation bool) (Interface, error) {
	return &cadvisorUnsupported{}, nil
}

var errUnsupported = errors.New("cAdvisor is unsupported in this build")

}

var _ Interface = new(cadvisorClient)

// New creates a cAdvisor and exports its API on the specified port if port > 0.
func New(imageFsInfoProvider ImageFsInfoProvider, rootPath string, cgroupRoots []string, usingLegacyStats, localStorageCapacityIsolation bool) (Interface, error) {
	client, err := winstats.NewPerfCounterClient()
	return &cadvisorClient{
		rootPath:       rootPath,
		winStatsClient: client,
	}, err

			klog.ErrorS(nil, "Expected cAdvisor flag not found", "flag", name)
		}
	}
}

// New creates a new cAdvisor Interface for linux systems.
func New(imageFsInfoProvider ImageFsInfoProvider, rootPath string, cgroupRoots []string, usingLegacyStats, localStorageCapacityIsolation bool) (Interface, error) {
	sysFs := sysfs.NewRealSysFs()

	includedMetrics := cadvisormetrics.MetricSet{
		cadvisormetrics.CpuUsageMetrics:     struct{}{},

	} else if kubeletCgroup != "" {
		cgroupRoots = append(cgroupRoots, kubeletCgroup)
	}

	if s.RuntimeCgroups != "" {
		// RuntimeCgroups is optional, so ignore if it isn't specified
		cgroupRoots = append(cgroupRoots, s.RuntimeCgroups)
	}

	if s.SystemCgroups != "" {
		// SystemCgroups is optional, so ignore if it isn't specified
		cgroupRoots = append(cgroupRoots, s.SystemCgroups)
	}

  
  kubeDeps.CAdvisorInterface, err = cadvisor.New(imageFsInfoProvider, s.RootDirectory, cgroupRoots, cadvisor.UsingLegacyCadvisorStats(s.ContainerRuntime, s.RemoteRuntimeEndpoint))
  the above function，as we use cgroupRoots to create cadvisor interface，the wrong parameter cgroupRoots will lead eviction manager not  to collect metric from /docker, then kubelet frequently print those error：