core

package
v1.2.0-v0.0.3 Latest Latest
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 Go to latest Published: Nov 6, 2016 License: Apache-2.0 Imports: 3 Imported by: 0

Documentation

Overview

Copyright 2016 Google Inc. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at 

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Index

Constants

View Source 
const (
	CustomMetricPrefix = "custom/"
)

Variables

View Source 
var (
	LabelMetricSetType = LabelDescriptor{
		Key:         "type",
		Description: "Type of the metrics set (container, pod, namespace, node, cluster)",
	}
	MetricSetTypeSystemContainer = "sys_container"
	MetricSetTypePodContainer    = "pod_container"
	MetricSetTypePod             = "pod"
	MetricSetTypeNamespace       = "ns"
	MetricSetTypeNode            = "node"
	MetricSetTypeCluster         = "cluster"

	LabelPodId = LabelDescriptor{
		Key:         "pod_id",
		Description: "The unique ID of the pod",
	}
	LabelPodName = LabelDescriptor{
		Key:         "pod_name",
		Description: "The name of the pod",
	}
	// Deprecated label
	LabelPodNamespace = LabelDescriptor{
		Key:         "pod_namespace",
		Description: "The namespace of the pod",
	}
	LabelNamespaceName = LabelDescriptor{
		Key:         "namespace_name",
		Description: "The name of the namespace",
	}
	LabelPodNamespaceUID = LabelDescriptor{
		Key:         "namespace_id",
		Description: "The UID of namespace of the pod",
	}
	LabelContainerName = LabelDescriptor{
		Key:         "container_name",
		Description: "User-provided name of the container or full container name for system containers",
	}
	LabelLabels = LabelDescriptor{
		Key:         "labels",
		Description: "Comma-separated list of user-provided labels",
	}
	LabelNodename = LabelDescriptor{
		Key:         "nodename",
		Description: "nodename where the container ran",
	}
	LabelHostname = LabelDescriptor{
		Key:         "hostname",
		Description: "Hostname where the container ran",
	}
	LabelResourceID = LabelDescriptor{
		Key:         "resource_id",
		Description: "Identifier(s) specific to a metric",
	}
	LabelHostID = LabelDescriptor{
		Key:         "host_id",
		Description: "Identifier specific to a host. Set by cloud provider or user",
	}
	LabelContainerBaseImage = LabelDescriptor{
		Key:         "container_base_image",
		Description: "User-defined image name that is run inside the container",
	}
	// The label is populated only for GCM
	LabelCustomMetricName = LabelDescriptor{
		Key:         "custom_metric_name",
		Description: "User-defined name of the exported custom metric",
	}
	LabelGCEResourceID = LabelDescriptor{
		Key:         "compute.googleapis.com/resource_id",
		Description: "Resource id for nodes specific for GCE.",
	}
	LabelGCEResourceType = LabelDescriptor{
		Key:         "compute.googleapis.com/resource_type",
		Description: "Resource types for nodes specific for GCE.",
	}
)
View Source 
var AdditionalMetrics = []Metric{
	MetricCpuRequest,
	MetricCpuLimit,
	MetricMemoryRequest,
	MetricMemoryLimit}

Metrics computed based on cluster state using Kubernetes API.

View Source 
var AllAggregations = map[AggregationType]bool{
	AggregationTypeAverage:      true,
	AggregationTypeMaximum:      true,
	AggregationTypeMinimum:      true,
	AggregationTypeMedian:       true,
	AggregationTypePercentile50: true,
	AggregationTypePercentile95: true,
	AggregationTypePercentile99: true,
	AggregationTypeCount:        true,
}

AllAggregations is the set of all supported aggregations

View Source 
var AllMetrics = append(append(append(append(StandardMetrics, AdditionalMetrics...), RateMetrics...), LabeledMetrics...),
	NodeAutoscalingMetrics...)
View Source 
var LabeledMetrics = []Metric{
	MetricFilesystemUsage,
	MetricFilesystemLimit,
	MetricFilesystemAvailable,
}
View Source 
var MetricCpuLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/limit",
		Description: "CPU hard limit in millicores.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}
View Source 
var MetricCpuRequest = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/request",
		Description: "CPU request (the guaranteed amount of resources) in millicores. This metric is Kubernetes specific.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}

Definition of Additional Metrics.

View Source 
var MetricCpuUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/usage",
		Description: "Cumulative CPU usage on all cores",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsNanoseconds,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasCpu
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Cpu.Usage.Total)}
	},
}
View Source 
var MetricCpuUsageRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/usage_rate",
		Description: "CPU usage on all cores in millicores",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}

Definition of Rate Metrics.

View Source 
var MetricFilesystemAvailable = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/available",
		Description: "The number of available bytes remaining in a the filesystem",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
}
View Source 
var MetricFilesystemLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/limit",
		Description: "The total size of filesystem in bytes",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
	HasLabeledMetric: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasFilesystem
	},
	GetLabeledMetric: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) []LabeledMetric {
		result := make([]LabeledMetric, 0, len(stat.Filesystem))
		for _, fs := range stat.Filesystem {
			result = append(result, LabeledMetric{
				Name: "filesystem/limit",
				Labels: map[string]string{
					LabelResourceID.Key: fs.Device,
				},
				MetricValue: MetricValue{
					ValueType:  ValueInt64,
					MetricType: MetricGauge,
					IntValue:   int64(fs.Limit),
				},
			})
		}
		return result
	},
}
View Source 
var MetricFilesystemUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/usage",
		Description: "Total number of bytes consumed on a filesystem",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
	HasLabeledMetric: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasFilesystem
	},
	GetLabeledMetric: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) []LabeledMetric {
		result := make([]LabeledMetric, 0, len(stat.Filesystem))
		for _, fs := range stat.Filesystem {
			result = append(result, LabeledMetric{
				Name: "filesystem/usage",
				Labels: map[string]string{
					LabelResourceID.Key: fs.Device,
				},
				MetricValue: MetricValue{
					ValueType:  ValueInt64,
					MetricType: MetricGauge,
					IntValue:   int64(fs.Usage),
				},
			})
		}
		return result
	},
}
View Source 
var MetricMemoryLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/limit",
		Description: "Memory hard limit in bytes.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
}
View Source 
var MetricMemoryMajorPageFaults = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/major_page_faults",
		Description: "Number of major page faults",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Memory.ContainerData.Pgmajfault)}
	},
}
View Source 
var MetricMemoryMajorPageFaultsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/major_page_faults_rate",
		Description: "Rate of major page faults in counts per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricMemoryPageFaults = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/page_faults",
		Description: "Number of page faults",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Memory.ContainerData.Pgfault)}
	},
}
View Source 
var MetricMemoryPageFaultsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/page_faults_rate",
		Description: "Rate of page faults in counts per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricMemoryRequest = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/request",
		Description: "Memory request (the guaranteed amount of resources) in bytes. This metric is Kubernetes specific.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
}
View Source 
var MetricMemoryUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/usage",
		Description: "Total memory usage",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricGauge,
			IntValue:   int64(stat.Memory.Usage)}
	},
}
View Source 
var MetricMemoryWorkingSet = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/working_set",
		Description: "Total working set usage. Working set is the memory being used and not easily dropped by the kernel",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricGauge,
			IntValue:   int64(stat.Memory.WorkingSet)}
	},
}
View Source 
var MetricNetworkRx = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx",
		Description: "Cumulative number of bytes received over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.RxBytes)}
	},
}
View Source 
var MetricNetworkRxErrors = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_errors",
		Description: "Cumulative number of errors while receiving over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.RxErrors)}
	},
}
View Source 
var MetricNetworkRxErrorsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_errors_rate",
		Description: "Rate of errors sending over the network in errors per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNetworkRxRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_rate",
		Description: "Rate of bytes received over the network in bytes per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNetworkTx = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx",
		Description: "Cumulative number of bytes sent over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.TxBytes)}
	},
}
View Source 
var MetricNetworkTxErrors = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_errors",
		Description: "Cumulative number of errors while sending over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.TxErrors)}
	},
}
View Source 
var MetricNetworkTxErrorsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_errors_rate",
		Description: "Rate of errors transmitting over the network in errors per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNetworkTxRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_rate",
		Description: "Rate of bytes transmitted over the network in bytes per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeCpuCapacity = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/node_capacity",
		Description: "Cpu capacity of a node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeCpuReservation = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/node_reservation",
		Description: "Share of cpu that is reserved on the node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeCpuUtilization = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/node_utilization",
		Description: "Cpu utilization as a share of node capacity",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeMemoryCapacity = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/node_capacity",
		Description: "Memory capacity of a node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeMemoryReservation = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/node_reservation",
		Description: "Share of memory that is reserved on the node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricNodeMemoryUtilization = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/node_utilization",
		Description: "Memory utilization as a share of memory capacity",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}
View Source 
var MetricUptime = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "uptime",
		Description: "Number of milliseconds since the container was started",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsMilliseconds,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return !spec.CreationTime.IsZero()
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   time.Since(spec.CreationTime).Nanoseconds() / time.Millisecond.Nanoseconds()}
	},
}

Definition of Standard Metrics.

View Source 
var MultiTypedAggregations = []AggregationType{
	AggregationTypeAverage,
	AggregationTypeMaximum,
	AggregationTypeMinimum,
	AggregationTypeMedian,
	AggregationTypePercentile50,
	AggregationTypePercentile95,
	AggregationTypePercentile99,
}

MultiTypedAggregations is the list of aggregations that can be either float or int

View Source 
var NodeAutoscalingMetrics = []Metric{
	MetricNodeCpuCapacity,
	MetricNodeMemoryCapacity,
	MetricNodeCpuUtilization,
	MetricNodeMemoryUtilization,
	MetricNodeCpuReservation,
	MetricNodeMemoryReservation,
}
View Source 
var RateMetrics = []Metric{
	MetricCpuUsageRate,
	MetricMemoryPageFaultsRate,
	MetricMemoryMajorPageFaultsRate,
	MetricNetworkRxRate,
	MetricNetworkRxErrorsRate,
	MetricNetworkTxRate,
	MetricNetworkTxErrorsRate}

Computed based on corresponding StandardMetrics.

View Source 
var RateMetricsMapping = map[string]Metric{
	MetricCpuUsage.MetricDescriptor.Name:              MetricCpuUsageRate,
	MetricMemoryPageFaults.MetricDescriptor.Name:      MetricMemoryPageFaultsRate,
	MetricMemoryMajorPageFaults.MetricDescriptor.Name: MetricMemoryMajorPageFaultsRate,
	MetricNetworkRx.MetricDescriptor.Name:             MetricNetworkRxRate,
	MetricNetworkRxErrors.MetricDescriptor.Name:       MetricNetworkRxErrorsRate,
	MetricNetworkTx.MetricDescriptor.Name:             MetricNetworkTxRate,
	MetricNetworkTxErrors.MetricDescriptor.Name:       MetricNetworkTxErrorsRate}
View Source 
var StandardMetrics = []Metric{
	MetricUptime,
	MetricCpuUsage,
	MetricMemoryUsage,
	MetricMemoryWorkingSet,
	MetricMemoryPageFaults,
	MetricMemoryMajorPageFaults,
	MetricNetworkRx,
	MetricNetworkRxErrors,
	MetricNetworkTx,
	MetricNetworkTxErrors}

Provided by Kubelet/cadvisor.

Functions

func ClusterKey 

func ClusterKey() string

func GcmLabels 

func GcmLabels() map[string]LabelDescriptor

func GcmNodeAutoscalingLabels 

func GcmNodeAutoscalingLabels() map[string]LabelDescriptor

func IsNodeAutoscalingMetric 

func IsNodeAutoscalingMetric(name string) bool

func NamespaceKey 

func NamespaceKey(namespace string) string

func NodeContainerKey 

func NodeContainerKey(node, container string) string

func NodeKey 

func NodeKey(node string) string

func PodContainerKey 

func PodContainerKey(namespace, podName, containerName string) string

func PodKey 

func PodKey(namespace, podName string) string

Types

type AggregationType 

type AggregationType string
var (
	AggregationTypeAverage      AggregationType = "average"
	AggregationTypeMaximum      AggregationType = "max"
	AggregationTypeMinimum      AggregationType = "min"
	AggregationTypeMedian       AggregationType = "median"
	AggregationTypeCount        AggregationType = "count"
	AggregationTypePercentile50 AggregationType = "50-perc"
	AggregationTypePercentile95 AggregationType = "95-perc"
	AggregationTypePercentile99 AggregationType = "99-perc"
)

type AggregationValue 

type AggregationValue struct {
	Count *uint64

	Aggregations map[AggregationType]MetricValue
}

AggregationValue is a description of aggregated MetricValues over time

type AsHistoricalSource 

type AsHistoricalSource interface {
	// Historical returns the historical data access interface for this sink
	Historical() HistoricalSource
}

AsHistoricalSource represents sinks which support a historical access interface

type DataBatch 

type DataBatch struct {
	Timestamp time.Time
	// Should use key functions from ms_keys.go
	MetricSets map[string]*MetricSet
}

type DataProcessor 

type DataProcessor interface {
	Name() string
	Process(*DataBatch) (*DataBatch, error)
}

type DataSink 

type DataSink interface {
	Name() string

	// Exports data to the external storge. The funciton should be synchronous/blocking and finish only
	// after the given DataBatch was written. This will allow sink manager to push data only to these
	// sinks that finished writing the previous data.
	ExportData(*DataBatch)
	Stop()
}

type HistoricalKey 

type HistoricalKey struct {
	// ObjectType specifies which type of object this is for (pod, namespace, etc)
	// It should be one of the MetricSetType* labels.
	ObjectType string

	// NodeName is used for node and system-container metrics
	NodeName string
	// NamespaceName is used for namespace, pod, and pod-container metrics
	NamespaceName string
	// PodName is used for pod and pod-container metrics
	PodName string
	// ContainerName is used for system-container and pod-container metrics
	ContainerName string
	// PodId may be used in place of the combination of PodName and NamespaceName for pod and pod-container metrics
	PodId string
}

HistoricalKey is an identifier pointing to a particular object. Is is composed of an object type (pod, namespace, container, etc) as well as a series of fields which identify that object.

func (*HistoricalKey) String 

func (key *HistoricalKey) String() string

type HistoricalSource 

type HistoricalSource interface {
	// GetMetric retrieves the given metric for one or more objects (specified by metricKeys) of
	// the same type, within the given time interval.  A start time of zero indicates no starting bound,
	// while an end time of zero indicates no ending bound.
	GetMetric(metricName string, metricKeys []HistoricalKey, start, end time.Time) (map[HistoricalKey][]TimestampedMetricValue, error)

	// GetLabeledMetric retrieves the given labeled metric.  Otherwise, it functions identically to GetMetric.
	GetLabeledMetric(metricName string, labels map[string]string, metricKeys []HistoricalKey, start, end time.Time) (map[HistoricalKey][]TimestampedMetricValue, error)

	// GetAggregation fetches the given aggregations for one or more objects (specified by metricKeys) of
	// the same type, within the given time interval, calculated over a series of buckets.  The start time,
	// end time, and bucket size may be zero.  A start time of zero indicates no starting bound, while and
	// end time of zero indicates no ending bound (effectively meaning up to the latest metrics, but not metrics
	// from the future).  A bucket size of zero indicates that only a single bucket spanning the entire specified
	// time range should be returned.
	GetAggregation(metricName string, aggregations []AggregationType, metricKeys []HistoricalKey, start, end time.Time, bucketSize time.Duration) (map[HistoricalKey][]TimestampedAggregationValue, error)

	// GetLabeledAggregation fetches a the given aggregations for a labeled metric instead of a normal metric.
	// Otherwise, it functions identically to GetAggregation.
	GetLabeledAggregation(metricName string, labels map[string]string, aggregations []AggregationType, metricKeys []HistoricalKey, start, end time.Time, bucketSize time.Duration) (map[HistoricalKey][]TimestampedAggregationValue, error)

	// GetMetricNames retrieves the available metric names for the given object
	GetMetricNames(metricKey HistoricalKey) ([]string, error)

	// GetNodes retrieves the list of nodes in the cluster
	GetNodes() ([]string, error)
	// GetNamespaces retrieves the list of namespaces in the cluster
	GetNamespaces() ([]string, error)
	// GetPodsFromNamespace retrieves the list of pods in a given namespace
	GetPodsFromNamespace(namespace string) ([]string, error)
	// GetSystemContainersFromNode retrieves the list of free containers for a given node
	GetSystemContainersFromNode(node string) ([]string, error)
}

HistoricalSource allows for retrieval of historical metrics and aggregations from sinks

type LabelDescriptor 

type LabelDescriptor struct {
	// Key to use for the label.
	Key string `json:"key,omitempty"`

	// Description of the label.
	Description string `json:"description,omitempty"`
}

func CommonLabels 

func CommonLabels() []LabelDescriptor

func ContainerLabels 

func ContainerLabels() []LabelDescriptor

func MetricLabels 

func MetricLabels() []LabelDescriptor

func PodLabels 

func PodLabels() []LabelDescriptor

func SupportedLabels 

func SupportedLabels() []LabelDescriptor

type LabeledMetric 

type LabeledMetric struct {
	Name   string
	Labels map[string]string
	MetricValue
}

func (*LabeledMetric) GetValue 

func (this *LabeledMetric) GetValue() interface{}

type Metric 

type Metric struct {
	MetricDescriptor

	// Returns whether this metric is present.
	HasValue func(*cadvisor.ContainerSpec) bool

	// Returns a slice of internal point objects that contain metric values and associated labels.
	GetValue func(*cadvisor.ContainerSpec, *cadvisor.ContainerStats) MetricValue

	// Returns whether this metric is present.
	HasLabeledMetric func(*cadvisor.ContainerSpec) bool

	// Returns a slice of internal point objects that contain metric values and associated labels.
	GetLabeledMetric func(*cadvisor.ContainerSpec, *cadvisor.ContainerStats) []LabeledMetric
}

Metric represents a resource usage stat metric.

type MetricDescriptor 

type MetricDescriptor struct {
	// The unique name of the metric.
	Name string `json:"name,omitempty"`

	// Description of the metric.
	Description string `json:"description,omitempty"`

	// Descriptor of the labels specific to this metric.
	Labels []LabelDescriptor `json:"labels,omitempty"`

	// Type and value of metric data.
	Type      MetricType `json:"type,omitempty"`
	ValueType ValueType  `json:"value_type,omitempty"`
	Units     UnitsType  `json:"units,omitempty"`
}

type MetricSet 

type MetricSet struct {
	CreateTime     time.Time
	ScrapeTime     time.Time
	MetricValues   map[string]MetricValue
	Labels         map[string]string
	LabeledMetrics []LabeledMetric
}

type MetricType 

type MetricType int8
const (
	MetricCumulative MetricType = iota
	MetricGauge
	MetricDelta
)

func (*MetricType) String 

func (self *MetricType) String() string

type MetricValue 

type MetricValue struct {
	IntValue   int64
	FloatValue float32
	MetricType MetricType
	ValueType  ValueType
}

func (*MetricValue) GetValue 

func (this *MetricValue) GetValue() interface{}

type MetricsSource 

type MetricsSource interface {
	Name() string
	ScrapeMetrics(start, end time.Time) *DataBatch
}

A place from where the metrics should be scraped.

type MetricsSourceProvider 

type MetricsSourceProvider interface {
	GetMetricsSources() []MetricsSource
}

Provider of list of sources to be scaped.

type TimestampedAggregationValue 

type TimestampedAggregationValue struct {
	// Timestamp is the start time of the bucket
	Timestamp time.Time

	// BucketSize is the duration of the bucket
	BucketSize time.Duration

	AggregationValue
}

TimestampedAggregationValue is an aggregation value with an associated timestamp and bucket size

type TimestampedMetricValue 

type TimestampedMetricValue struct {
	MetricValue
	Timestamp time.Time
}

TimestampedMetricValue is a metric value with an associated timestamp

type UnitsType 

type UnitsType int8
const (
	// A counter metric.
	UnitsCount UnitsType = iota
	// A metric in bytes.
	UnitsBytes
	// A metric in milliseconds.
	UnitsMilliseconds
	// A metric in nanoseconds.
	UnitsNanoseconds
	// A metric in millicores.
	UnitsMillicores
)

func (*UnitsType) String 

func (self *UnitsType) String() string

type ValueType 

type ValueType int8
const (
	ValueInt64 ValueType = iota
	ValueFloat
)

func (*ValueType) String 

func (self *ValueType) String() string

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