metrics

package
v0.0.0-...-9c2cf05 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Sep 30, 2019 License: Apache-2.0 Imports: 27 Imported by: 0

Documentation

Overview

Package metrics provides Knative utilities for exporting metrics to Stackdriver backend or Prometheus backend based on config-observability settings.

Index

Constants

View Source 
const (
	DomainEnv        = "METRICS_DOMAIN"
	ConfigMapNameEnv = "CONFIG_OBSERVABILITY_NAME"
)
View Source 
const (
	// The following keys are used to configure metrics reporting.
	// See https://github.com/knative/serving/blob/master/config/config-observability.yaml
	// for details.
	AllowStackdriverCustomMetricsKey    = "metrics.allow-stackdriver-custom-metrics"
	BackendDestinationKey               = "metrics.backend-destination"
	ReportingPeriodKey                  = "metrics.reporting-period-seconds"
	StackdriverProjectIDKey             = "metrics.stackdriver-project-id"
	StackdriverCustomMetricSubDomainKey = "metrics.stackdriver-custom-metrics-subdomain"

	// Stackdriver is used for Stackdriver backend
	Stackdriver metricsBackend = "stackdriver"
	// Prometheus is used for Prometheus backend
	Prometheus metricsBackend = "prometheus"
)

Variables

This section is empty.

Functions

func Buckets125 

func Buckets125(low, high float64) []float64

Buckets125 generates an array of buckets with approximate powers-of-two buckets that also aligns with powers of 10 on every 3rd step. This can be used to create a view.Distribution.

func BucketsNBy10 

func BucketsNBy10(low float64, n int) []float64

BucketsNBy10 generates an array of N buckets starting from low and multiplying by 10 n times.

func ConfigMapName 

func ConfigMapName() string

ConfigMapName gets the name of the metrics ConfigMap

func Domain 

func Domain() string

Domain holds the metrics domain to use for surfacing metrics.

func FlushExporter 

func FlushExporter() bool

FlushExporter waits for exported data to be uploaded. This should be called before the process shuts down or exporter is replaced. Return value indicates whether the exporter is flushable or not.

func GetKnativeBrokerMonitoredResource 

func GetKnativeBrokerMonitoredResource(
	v *view.View, tags []tag.Tag, gm *gcpMetadata) ([]tag.Tag, monitoredresource.Interface)

func GetKnativeRevisionMonitoredResource 

func GetKnativeRevisionMonitoredResource(
	v *view.View, tags []tag.Tag, gm *gcpMetadata) ([]tag.Tag, monitoredresource.Interface)

func GetKnativeSourceMonitoredResource 

func GetKnativeSourceMonitoredResource(
	v *view.View, tags []tag.Tag, gm *gcpMetadata) ([]tag.Tag, monitoredresource.Interface)

func GetKnativeTriggerMonitoredResource 

func GetKnativeTriggerMonitoredResource(
	v *view.View, tags []tag.Tag, gm *gcpMetadata) ([]tag.Tag, monitoredresource.Interface)

func MetricsOptionsToJson 

func MetricsOptionsToJson(opts *ExporterOptions) (string, error)

MetricsOptionsToJson converts a ExporterOptions to a json string.

func Record 

func Record(ctx context.Context, ms stats.Measurement, ros ...stats.Options)

Record decides whether to record one measurement via OpenCensus based on the following conditions:

  1. No package level metrics config. In this case it just proxies to OpenCensus based on the assumption that users expect the metrics to be recorded when they call this function. Users must ensure metrics config are set before using this function to get expected behavior.
  2. The backend is not Stackdriver.
  3. The backend is Stackdriver and it is allowed to use custom metrics.
  4. The backend is Stackdriver and the metric is one of the built-in metrics: "knative_revision", "knative_broker", "knative_trigger", "knative_source".

func ResponseCodeClass 

func ResponseCodeClass(responseCode int) string

ResponseCodeClass converts an HTTP response code to a string representing its response code class. E.g., The response code class is "5xx" for response code 503.

func UpdateExporter 

func UpdateExporter(ops ExporterOptions, logger *zap.SugaredLogger) error

UpdateExporter updates the exporter based on the given ExporterOptions.

func UpdateExporterFromConfigMap 

func UpdateExporterFromConfigMap(component string, logger *zap.SugaredLogger) func(configMap *corev1.ConfigMap)

UpdateExporterFromConfigMap returns a helper func that can be used to update the exporter when a config map is updated.

Types

type ClientProvider 

type ClientProvider struct {
	Latency *stats.Float64Measure
	Result  *stats.Int64Measure
}

ClientProvider implements the pattern of Kubernetes MetricProvider that may be used to produce suitable metrics for use with metrics.Register()

func (*ClientProvider) DefaultViews 

func (cp *ClientProvider) DefaultViews() []*view.View

DefaultViews returns a list of views suitable for passing to view.Register

func (*ClientProvider) LatencyView 

func (cp *ClientProvider) LatencyView() *view.View

LatencyView returns a view of the Latency metric.

func (*ClientProvider) NewLatencyMetric 

func (cp *ClientProvider) NewLatencyMetric() metrics.LatencyMetric

NewLatencyMetric implements MetricsProvider

func (*ClientProvider) NewResultMetric 

func (cp *ClientProvider) NewResultMetric() metrics.ResultMetric

NewResultMetric implements MetricsProvider

func (*ClientProvider) ResultView 

func (cp *ClientProvider) ResultView() *view.View

ResultView returns a view of the Result metric.

type ExporterOptions 

type ExporterOptions struct {
	// Domain is the metrics domain. e.g. "knative.dev". Must be present.
	Domain string

	// Component is the name of the component that emits the metrics. e.g.
	// "activator", "queue_proxy". Should only contains alphabets and underscore.
	// Must be present.
	Component string

	// PrometheusPort is the port to expose metrics if metrics backend is Prometheus.
	// It should be between maxPrometheusPort and maxPrometheusPort. 0 value means
	// using the default 9090 value. If is ignored if metrics backend is not
	// Prometheus.
	PrometheusPort int

	// ConfigMap is the data from config map config-observability. Must be present.
	// See https://github.com/knative/serving/blob/master/config/config-observability.yaml
	// for details.
	ConfigMap map[string]string
}

ExporterOptions contains options for configuring the exporter.

func JsonToMetricsOptions 

func JsonToMetricsOptions(jsonOpts string) (*ExporterOptions, error)

JsonToMetricsOptions converts a json string of a ExporterOptions. Returns a non-nil ExporterOptions always.

type Global 

type Global struct{}

func (*Global) MonitoredResource 

func (g *Global) MonitoredResource() (resType string, labels map[string]string)

type KnativeBroker 

type KnativeBroker struct {
	Project       string
	Location      string
	ClusterName   string
	NamespaceName string
	BrokerName    string
}

func (*KnativeBroker) MonitoredResource 

func (kb *KnativeBroker) MonitoredResource() (resType string, labels map[string]string)

type KnativeRevision 

type KnativeRevision struct {
	Project           string
	Location          string
	ClusterName       string
	NamespaceName     string
	ServiceName       string
	ConfigurationName string
	RevisionName      string
}

func (*KnativeRevision) MonitoredResource 

func (kr *KnativeRevision) MonitoredResource() (resType string, labels map[string]string)

type KnativeSource 

type KnativeSource struct {
	Project             string
	Location            string
	ClusterName         string
	NamespaceName       string
	SourceName          string
	SourceResourceGroup string
}

func (*KnativeSource) MonitoredResource 

func (ki *KnativeSource) MonitoredResource() (resType string, labels map[string]string)

type KnativeTrigger 

type KnativeTrigger struct {
	Project               string
	Location              string
	ClusterName           string
	NamespaceName         string
	TriggerName           string
	BrokerName            string
	TypeFilterAttribute   string
	SourceFilterAttribute string
}

func (*KnativeTrigger) MonitoredResource 

func (kt *KnativeTrigger) MonitoredResource() (resType string, labels map[string]string)

type MemStatsProvider 

type MemStatsProvider struct {
	// Alloc is bytes of allocated heap objects.
	//
	// This is the same as HeapAlloc (see below).
	Alloc *stats.Int64Measure

	// TotalAlloc is cumulative bytes allocated for heap objects.
	//
	// TotalAlloc increases as heap objects are allocated, but
	// unlike Alloc and HeapAlloc, it does not decrease when
	// objects are freed.
	TotalAlloc *stats.Int64Measure

	// Sys is the total bytes of memory obtained from the OS.
	//
	// Sys is the sum of the XSys fields below. Sys measures the
	// virtual address space reserved by the Go runtime for the
	// heap, stacks, and other internal data structures. It's
	// likely that not all of the virtual address space is backed
	// by physical memory at any given moment, though in general
	// it all was at some point.
	Sys *stats.Int64Measure

	// Lookups is the number of pointer lookups performed by the
	// runtime.
	//
	// This is primarily useful for debugging runtime internals.
	Lookups *stats.Int64Measure

	// Mallocs is the cumulative count of heap objects allocated.
	// The number of live objects is Mallocs - Frees.
	Mallocs *stats.Int64Measure

	// Frees is the cumulative count of heap objects freed.
	Frees *stats.Int64Measure

	// HeapAlloc is bytes of allocated heap objects.
	//
	// "Allocated" heap objects include all reachable objects, as
	// well as unreachable objects that the garbage collector has
	// not yet freed. Specifically, HeapAlloc increases as heap
	// objects are allocated and decreases as the heap is swept
	// and unreachable objects are freed. Sweeping occurs
	// incrementally between GC cycles, so these two processes
	// occur simultaneously, and as a result HeapAlloc tends to
	// change smoothly (in contrast with the sawtooth that is
	// typical of stop-the-world garbage collectors).
	HeapAlloc *stats.Int64Measure

	// HeapSys is bytes of heap memory obtained from the OS.
	//
	// HeapSys measures the amount of virtual address space
	// reserved for the heap. This includes virtual address space
	// that has been reserved but not yet used, which consumes no
	// physical memory, but tends to be small, as well as virtual
	// address space for which the physical memory has been
	// returned to the OS after it became unused (see HeapReleased
	// for a measure of the latter).
	//
	// HeapSys estimates the largest size the heap has had.
	HeapSys *stats.Int64Measure

	// HeapIdle is bytes in idle (unused) spans.
	//
	// Idle spans have no objects in them. These spans could be
	// (and may already have been) returned to the OS, or they can
	// be reused for heap allocations, or they can be reused as
	// stack memory.
	//
	// HeapIdle minus HeapReleased estimates the amount of memory
	// that could be returned to the OS, but is being retained by
	// the runtime so it can grow the heap without requesting more
	// memory from the OS. If this difference is significantly
	// larger than the heap size, it indicates there was a recent
	// transient spike in live heap size.
	HeapIdle *stats.Int64Measure

	// HeapInuse is bytes in in-use spans.
	//
	// In-use spans have at least one object in them. These spans
	// can only be used for other objects of roughly the same
	// size.
	//
	// HeapInuse minus HeapAlloc estimates the amount of memory
	// that has been dedicated to particular size classes, but is
	// not currently being used. This is an upper bound on
	// fragmentation, but in general this memory can be reused
	// efficiently.
	HeapInuse *stats.Int64Measure

	// HeapReleased is bytes of physical memory returned to the OS.
	//
	// This counts heap memory from idle spans that was returned
	// to the OS and has not yet been reacquired for the heap.
	HeapReleased *stats.Int64Measure

	// HeapObjects is the number of allocated heap objects.
	//
	// Like HeapAlloc, this increases as objects are allocated and
	// decreases as the heap is swept and unreachable objects are
	// freed.
	HeapObjects *stats.Int64Measure

	// StackInuse is bytes in stack spans.
	//
	// In-use stack spans have at least one stack in them. These
	// spans can only be used for other stacks of the same size.
	//
	// There is no StackIdle because unused stack spans are
	// returned to the heap (and hence counted toward HeapIdle).
	StackInuse *stats.Int64Measure

	// StackSys is bytes of stack memory obtained from the OS.
	//
	// StackSys is StackInuse, plus any memory obtained directly
	// from the OS for OS thread stacks (which should be minimal).
	StackSys *stats.Int64Measure

	// MSpanInuse is bytes of allocated mspan structures.
	MSpanInuse *stats.Int64Measure

	// MSpanSys is bytes of memory obtained from the OS for mspan
	// structures.
	MSpanSys *stats.Int64Measure

	// MCacheInuse is bytes of allocated mcache structures.
	MCacheInuse *stats.Int64Measure

	// MCacheSys is bytes of memory obtained from the OS for
	// mcache structures.
	MCacheSys *stats.Int64Measure

	// BuckHashSys is bytes of memory in profiling bucket hash tables.
	BuckHashSys *stats.Int64Measure

	// GCSys is bytes of memory in garbage collection metadata.
	GCSys *stats.Int64Measure

	// OtherSys is bytes of memory in miscellaneous off-heap
	// runtime allocations.
	OtherSys *stats.Int64Measure

	// NextGC is the target heap size of the next GC cycle.
	//
	// The garbage collector's goal is to keep HeapAlloc ≤ NextGC.
	// At the end of each GC cycle, the target for the next cycle
	// is computed based on the amount of reachable data and the
	// value of GOGC.
	NextGC *stats.Int64Measure

	// LastGC is the time the last garbage collection finished, as
	// nanoseconds since 1970 (the UNIX epoch).
	LastGC *stats.Int64Measure

	// PauseTotalNs is the cumulative nanoseconds in GC
	// stop-the-world pauses since the program started.
	//
	// During a stop-the-world pause, all goroutines are paused
	// and only the garbage collector can run.
	PauseTotalNs *stats.Int64Measure

	// NumGC is the number of completed GC cycles.
	NumGC *stats.Int64Measure

	// NumForcedGC is the number of GC cycles that were forced by
	// the application calling the GC function.
	NumForcedGC *stats.Int64Measure

	// GCCPUFraction is the fraction of this program's available
	// CPU time used by the GC since the program started.
	//
	// GCCPUFraction is expressed as a number between 0 and 1,
	// where 0 means GC has consumed none of this program's CPU. A
	// program's available CPU time is defined as the integral of
	// GOMAXPROCS since the program started. That is, if
	// GOMAXPROCS is 2 and a program has been running for 10
	// seconds, its "available CPU" is 20 seconds. GCCPUFraction
	// does not include CPU time used for write barrier activity.
	//
	// This is the same as the fraction of CPU reported by
	// GODEBUG=gctrace=1.
	GCCPUFraction *stats.Float64Measure
}

MemStatsProvider is used to expose metrics based on Go's runtime.MemStats. The fields below (and their comments) are a filtered list taken from Go's runtime.MemStats.

func NewMemStatsAll 

func NewMemStatsAll() *MemStatsProvider

NewMemStatsAll creates a new MemStatsProvider with stats for all of the supported Go runtime.MemStat fields.

func (*MemStatsProvider) DefaultViews 

func (msp *MemStatsProvider) DefaultViews() (views []*view.View)

DefaultViews returns a list of views suitable for passing to view.Register

func (*MemStatsProvider) Start 

func (msp *MemStatsProvider) Start(ctx context.Context, period time.Duration)

Start initiates a Go routine that starts pushing metrics into the provided measures.

type ReflectorProvider 

type ReflectorProvider struct {
	ItemsInList *stats.Float64Measure
	// TODO(mattmoor): This is not in the latest version, so it will
	// be removed in a future version.
	ItemsInMatch        *stats.Float64Measure
	ItemsInWatch        *stats.Float64Measure
	LastResourceVersion *stats.Float64Measure
	ListDuration        *stats.Float64Measure
	Lists               *stats.Int64Measure
	ShortWatches        *stats.Int64Measure
	WatchDuration       *stats.Float64Measure
	Watches             *stats.Int64Measure
}

ReflectorProvider implements reflector.MetricsProvider and may be used with reflector.SetProvider to have metrics exported to the provided metrics.

func (*ReflectorProvider) DefaultViews 

func (rp *ReflectorProvider) DefaultViews() []*view.View

DefaultViews returns a list of views suitable for passing to view.Register

func (*ReflectorProvider) ItemsInListView 

func (rp *ReflectorProvider) ItemsInListView() *view.View

ItemsInListView returns a view of the ItemsInList metric.

func (*ReflectorProvider) ItemsInMatchView 

func (rp *ReflectorProvider) ItemsInMatchView() *view.View

ItemsInMatchView returns a view of the ItemsInMatch metric.

func (*ReflectorProvider) ItemsInWatchView 

func (rp *ReflectorProvider) ItemsInWatchView() *view.View

ItemsInWatchView returns a view of the ItemsInWatch metric.

func (*ReflectorProvider) LastResourceVersionView 

func (rp *ReflectorProvider) LastResourceVersionView() *view.View

LastResourceVersionView returns a view of the LastResourceVersion metric.

func (*ReflectorProvider) ListDurationView 

func (rp *ReflectorProvider) ListDurationView() *view.View

ListDurationView returns a view of the ListDuration metric.

func (*ReflectorProvider) ListsView 

func (rp *ReflectorProvider) ListsView() *view.View

ListsView returns a view of the Lists metric.

func (*ReflectorProvider) NewItemsInListMetric 

func (rp *ReflectorProvider) NewItemsInListMetric(name string) cache.SummaryMetric

NewItemsInListMetric implements MetricsProvider

func (*ReflectorProvider) NewItemsInMatchMetric 

func (rp *ReflectorProvider) NewItemsInMatchMetric(name string) cache.SummaryMetric

NewItemsInMatchMetric implements MetricsProvider

func (*ReflectorProvider) NewItemsInWatchMetric 

func (rp *ReflectorProvider) NewItemsInWatchMetric(name string) cache.SummaryMetric

NewItemsInWatchMetric implements MetricsProvider

func (*ReflectorProvider) NewLastResourceVersionMetric 

func (rp *ReflectorProvider) NewLastResourceVersionMetric(name string) cache.GaugeMetric

NewLastResourceVersionMetric implements MetricsProvider

func (*ReflectorProvider) NewListDurationMetric 

func (rp *ReflectorProvider) NewListDurationMetric(name string) cache.SummaryMetric

NewListDurationMetric implements MetricsProvider

func (*ReflectorProvider) NewListsMetric 

func (rp *ReflectorProvider) NewListsMetric(name string) cache.CounterMetric

NewListsMetric implements MetricsProvider

func (*ReflectorProvider) NewShortWatchesMetric 

func (rp *ReflectorProvider) NewShortWatchesMetric(name string) cache.CounterMetric

NewShortWatchesMetric implements MetricsProvider

func (*ReflectorProvider) NewWatchDurationMetric 

func (rp *ReflectorProvider) NewWatchDurationMetric(name string) cache.SummaryMetric

NewWatchDurationMetric implements MetricsProvider

func (*ReflectorProvider) NewWatchesMetric 

func (rp *ReflectorProvider) NewWatchesMetric(name string) cache.CounterMetric

NewWatchesMetric implements MetricsProvider

func (*ReflectorProvider) ShortWatchesView 

func (rp *ReflectorProvider) ShortWatchesView() *view.View

ShortWatchesView returns a view of the ShortWatches metric.

func (*ReflectorProvider) WatchDurationView 

func (rp *ReflectorProvider) WatchDurationView() *view.View

WatchDurationView returns a view of the WatchDuration metric.

func (*ReflectorProvider) WatchesView 

func (rp *ReflectorProvider) WatchesView() *view.View

WatchesView returns a view of the Watches metric.

type WorkqueueProvider 

type WorkqueueProvider struct {
	Adds                           *stats.Int64Measure
	Depth                          *stats.Int64Measure
	Latency                        *stats.Float64Measure
	UnfinishedWorkSeconds          *stats.Float64Measure
	LongestRunningProcessorSeconds *stats.Float64Measure
	Retries                        *stats.Int64Measure
	WorkDuration                   *stats.Float64Measure
}

WorkqueueProvider implements workqueue.MetricsProvider and may be used with workqueue.SetProvider to have metrics exported to the provided metrics.

func (*WorkqueueProvider) AddsView 

func (wp *WorkqueueProvider) AddsView() *view.View

AddsView returns a view of the Adds metric.

func (*WorkqueueProvider) DefaultViews 

func (wp *WorkqueueProvider) DefaultViews() []*view.View

DefaultViews returns a list of views suitable for passing to view.Register

func (*WorkqueueProvider) DepthView 

func (wp *WorkqueueProvider) DepthView() *view.View

DepthView returns a view of the Depth metric.

func (*WorkqueueProvider) LatencyView 

func (wp *WorkqueueProvider) LatencyView() *view.View

LatencyView returns a view of the Latency metric.

func (*WorkqueueProvider) LongestRunningProcessorSecondsView 

func (wp *WorkqueueProvider) LongestRunningProcessorSecondsView() *view.View

LongestRunningProcessorSecondsView returns a view of the LongestRunningProcessorSeconds metric.

func (*WorkqueueProvider) NewAddsMetric 

func (wp *WorkqueueProvider) NewAddsMetric(name string) workqueue.CounterMetric

NewAddsMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedAddsMetric 

func (wp *WorkqueueProvider) NewDeprecatedAddsMetric(name string) workqueue.CounterMetric

NewDeprecatedAddsMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedDepthMetric 

func (wp *WorkqueueProvider) NewDeprecatedDepthMetric(name string) workqueue.GaugeMetric

NewDeprecatedDepthMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedLatencyMetric 

func (wp *WorkqueueProvider) NewDeprecatedLatencyMetric(name string) workqueue.SummaryMetric

NewDeprecatedLatencyMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedLongestRunningProcessorMicrosecondsMetric 

func (wp *WorkqueueProvider) NewDeprecatedLongestRunningProcessorMicrosecondsMetric(name string) workqueue.SettableGaugeMetric

NewDeprecatedLongestRunningProcessorMicrosecondsMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedRetriesMetric 

func (wp *WorkqueueProvider) NewDeprecatedRetriesMetric(name string) workqueue.CounterMetric

NewDeprecatedRetriesMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedUnfinishedWorkSecondsMetric 

func (wp *WorkqueueProvider) NewDeprecatedUnfinishedWorkSecondsMetric(name string) workqueue.SettableGaugeMetric

NewDeprecatedUnfinishedWorkSecondsMetric implements MetricsProvider

func (*WorkqueueProvider) NewDeprecatedWorkDurationMetric 

func (wp *WorkqueueProvider) NewDeprecatedWorkDurationMetric(name string) workqueue.SummaryMetric

NewDeprecatedWorkDurationMetric implements MetricsProvider

func (*WorkqueueProvider) NewDepthMetric 

func (wp *WorkqueueProvider) NewDepthMetric(name string) workqueue.GaugeMetric

NewDepthMetric implements MetricsProvider

func (*WorkqueueProvider) NewLatencyMetric 

func (wp *WorkqueueProvider) NewLatencyMetric(name string) workqueue.HistogramMetric

NewLatencyMetric implements MetricsProvider

func (*WorkqueueProvider) NewLongestRunningProcessorSecondsMetric 

func (wp *WorkqueueProvider) NewLongestRunningProcessorSecondsMetric(name string) workqueue.SettableGaugeMetric

NewLongestRunningProcessorSecondsMetric implements MetricsProvider

func (*WorkqueueProvider) NewRetriesMetric 

func (wp *WorkqueueProvider) NewRetriesMetric(name string) workqueue.CounterMetric

NewRetriesMetric implements MetricsProvider

func (*WorkqueueProvider) NewUnfinishedWorkSecondsMetric 

func (wp *WorkqueueProvider) NewUnfinishedWorkSecondsMetric(name string) workqueue.SettableGaugeMetric

NewUnfinishedWorkSecondsMetric implements MetricsProvider

func (*WorkqueueProvider) NewWorkDurationMetric 

func (wp *WorkqueueProvider) NewWorkDurationMetric(name string) workqueue.HistogramMetric

NewWorkDurationMetric implements MetricsProvider

func (*WorkqueueProvider) RetriesView 

func (wp *WorkqueueProvider) RetriesView() *view.View

RetriesView returns a view of the Retries metric.

func (*WorkqueueProvider) UnfinishedWorkSecondsView 

func (wp *WorkqueueProvider) UnfinishedWorkSecondsView() *view.View

UnfinishedWorkSecondsView returns a view of the UnfinishedWorkSeconds metric.

func (*WorkqueueProvider) WorkDurationView 

func (wp *WorkqueueProvider) WorkDurationView() *view.View

WorkDurationView returns a view of the WorkDuration metric.

Source Files

View all Source files

Directories

Path Synopsis

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.