stats

package
Version: v1.22.2 Latest Latest
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Published: Sep 15, 2021 License: Apache-2.0 Imports: 23 Imported by: 75

Documentation

Overview

Package stats handles exporting Kubelet and container stats. NOTE: We intend to move this functionality into a standalone pod, so this package should be very loosely coupled to the rest of the Kubelet.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func CreateHandlers

func CreateHandlers(rootPath string, provider Provider, summaryProvider SummaryProvider) *restful.WebService

CreateHandlers creates the REST handlers for the stats.

Types

type PodVolumeStats

type PodVolumeStats struct {
	EphemeralVolumes  []stats.VolumeStats
	PersistentVolumes []stats.VolumeStats
}

PodVolumeStats encapsulates the VolumeStats for a pod. It consists of two lists, for local ephemeral volumes, and for persistent volumes respectively.

type Provider added in v1.14.0

type Provider interface {
	// The following stats are provided by either CRI or cAdvisor.
	//
	// ListPodStats returns the stats of all the containers managed by pods.
	ListPodStats() ([]statsapi.PodStats, error)
	// ListPodStatsAndUpdateCPUNanoCoreUsage updates the cpu nano core usage for
	// the containers and returns the stats for all the pod-managed containers.
	ListPodCPUAndMemoryStats() ([]statsapi.PodStats, error)
	// ListPodStatsAndUpdateCPUNanoCoreUsage returns the stats of all the
	// containers managed by pods and force update the cpu usageNanoCores.
	// This is a workaround for CRI runtimes that do not integrate with
	// cadvisor. See https://github.com/kubernetes/kubernetes/issues/72788
	// for more details.
	ListPodStatsAndUpdateCPUNanoCoreUsage() ([]statsapi.PodStats, error)
	// ImageFsStats returns the stats of the image filesystem.
	ImageFsStats() (*statsapi.FsStats, error)

	// The following stats are provided by cAdvisor.
	//
	// GetCgroupStats returns the stats and the networking usage of the cgroup
	// with the specified cgroupName.
	GetCgroupStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, *statsapi.NetworkStats, error)
	// GetCgroupCPUAndMemoryStats returns the CPU and memory stats of the cgroup with the specified cgroupName.
	GetCgroupCPUAndMemoryStats(cgroupName string, updateStats bool) (*statsapi.ContainerStats, error)

	// RootFsStats returns the stats of the node root filesystem.
	RootFsStats() (*statsapi.FsStats, error)

	// The following stats are provided by cAdvisor for legacy usage.
	//
	// GetContainerInfo returns the information of the container with the
	// containerName managed by the pod with the uid.
	GetContainerInfo(podFullName string, uid types.UID, containerName string, req *cadvisorapi.ContainerInfoRequest) (*cadvisorapi.ContainerInfo, error)
	// GetRawContainerInfo returns the information of the container with the
	// containerName. If subcontainers is true, this function will return the
	// information of all the sub-containers as well.
	GetRawContainerInfo(containerName string, req *cadvisorapi.ContainerInfoRequest, subcontainers bool) (map[string]*cadvisorapi.ContainerInfo, error)
	// GetRequestedContainersInfo returns the information of the container with
	// the containerName, and with the specified cAdvisor options.
	GetRequestedContainersInfo(containerName string, options cadvisorv2.RequestOptions) (map[string]*cadvisorapi.ContainerInfo, error)

	// The following information is provided by Kubelet.
	//
	// GetPodByName returns the spec of the pod with the name in the specified
	// namespace.
	GetPodByName(namespace, name string) (*v1.Pod, bool)
	// GetNode returns the spec of the local node.
	GetNode() (*v1.Node, error)
	// GetNodeConfig returns the configuration of the local node.
	GetNodeConfig() cm.NodeConfig
	// ListVolumesForPod returns the stats of the volume used by the pod with
	// the podUID.
	ListVolumesForPod(podUID types.UID) (map[string]volume.Volume, bool)
	// ListBlockVolumesForPod returns the stats of the volume used by the
	// pod with the podUID.
	ListBlockVolumesForPod(podUID types.UID) (map[string]volume.BlockVolume, bool)
	// GetPods returns the specs of all the pods running on this node.
	GetPods() []*v1.Pod

	// RlimitStats returns the rlimit stats of system.
	RlimitStats() (*statsapi.RlimitStats, error)

	// GetPodCgroupRoot returns the literal cgroupfs value for the cgroup containing all pods
	GetPodCgroupRoot() string

	// GetPodByCgroupfs provides the pod that maps to the specified cgroup literal, as well
	// as whether the pod was found.
	GetPodByCgroupfs(cgroupfs string) (*v1.Pod, bool)
}

Provider hosts methods required by stats handlers.

type ResourceAnalyzer

type ResourceAnalyzer interface {
	Start()

	SummaryProvider
	// contains filtered or unexported methods
}

ResourceAnalyzer provides statistics on node resource consumption

func NewResourceAnalyzer

func NewResourceAnalyzer(statsProvider Provider, calVolumeFrequency time.Duration, eventRecorder record.EventRecorder) ResourceAnalyzer

NewResourceAnalyzer returns a new ResourceAnalyzer

type SummaryProvider

type SummaryProvider interface {
	// Get provides a new Summary with the stats from Kubelet,
	// and will update some stats if updateStats is true
	Get(updateStats bool) (*statsapi.Summary, error)
	// GetCPUAndMemoryStats provides a new Summary with the CPU and memory stats from Kubelet,
	GetCPUAndMemoryStats() (*statsapi.Summary, error)
}

SummaryProvider provides summaries of the stats from Kubelet.

func NewSummaryProvider

func NewSummaryProvider(statsProvider Provider) SummaryProvider

NewSummaryProvider returns a SummaryProvider using the stats provided by the specified statsProvider.

Directories

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