utils

package
v1.14.8 Latest Latest
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 Go to latest Published: Jun 21, 2022 License: Apache-2.0 Imports: 35 Imported by: 68

Documentation

Overview

Package utils contains shared data structures and functions.

Index

Constants

View Source 
const (
	// Add used to record additions in a sync pool.
	Add = iota
	// Remove used to record removals from a sync pool.
	Remove
	// Sync used to record syncs of a sync pool.
	Sync
	// Get used to record Get from a sync pool.
	Get
	// Create used to record creations in a sync pool.
	Create
	// Update used to record updates in a sync pool.
	Update
	// Delete used to record deltions from a sync pool.
	Delete
	// AddInstances used to record a call to AddInstances.
	AddInstances
	// RemoveInstances used to record a call to RemoveInstances.
	RemoveInstances
	// LabelNodeRoleMaster specifies that a node is a master
	// This is a duplicate definition of the constant in:
	// kubernetes/kubernetes/pkg/controller/service/service_controller.go
	LabelNodeRoleMaster = "node-role.kubernetes.io/master"
	// LabelNodeRoleExcludeBalancer specifies that a node should be excluded from load-balancing
	// This is a duplicate definition of the constant in kubernetes core:
	//  https://github.com/kubernetes/kubernetes/blob/ea0764452222146c47ec826977f49d7001b0ea8c/staging/src/k8s.io/api/core/v1/well_known_labels.go#L67
	LabelNodeRoleExcludeBalancer = "node.kubernetes.io/exclude-from-external-load-balancers"
	// ToBeDeletedTaint is the taint that the autoscaler adds when a node is scheduled to be deleted
	// https://github.com/kubernetes/autoscaler/blob/cluster-autoscaler-0.5.2/cluster-autoscaler/utils/deletetaint/delete.go#L33
	ToBeDeletedTaint = "ToBeDeletedByClusterAutoscaler"
	// GKECurrentOperationLabel is added by the GKE control plane, to nodes that are about to be drained as a result of an upgrade/resize operation.
	// The operation value is "drain".
	GKECurrentOperationLabel = "operation.gke.io/type"
	// NodeDrain is the string used to indicate the Node Draining operation.
	NodeDrain                = "drain"
	L4ILBServiceDescKey      = "networking.gke.io/service-name"
	L4ILBSharedResourcesDesc = "This resource is shared by all L4 ILB Services using ExternalTrafficPolicy: Cluster."

	// LabelAlphaNodeRoleExcludeBalancer specifies that the node should be
	// exclude from load balancers created by a cloud provider. This label is deprecated and will
	// be removed in 1.18.
	LabelAlphaNodeRoleExcludeBalancer = "alpha.service-controller.kubernetes.io/exclude-balancer"
)

Variables

View Source 
var (
	// AllNodesPredicate selects all nodes.
	AllNodesPredicate = func(node *api_v1.Node) bool { return true }
	// CandidateNodesPredicate selects all nodes that are in ready state and devoid of any exclude labels.
	// This is a duplicate definition of the function in:
	// https://github.com/kubernetes/kubernetes/blob/3723713c550f649b6ba84964edef9da6cc334f9d/staging/src/k8s.io/cloud-provider/controllers/service/controller.go#L668
	CandidateNodesPredicate = func(node *api_v1.Node) bool {
		return nodePredicateInternal(node, false, false)
	}
	// CandidateNodesPredicateIncludeUnreadyExcludeUpgradingNodes selects all nodes except ones that are upgradind and/or have any exclude labels. This function tolerates unready nodes.
	// TODO(prameshj) - Once the kubernetes/kubernetes Predicate function includes Unready nodes and the GKE nodepool code sets exclude labels on upgrade, this can be replaced with CandidateNodesPredicate.
	CandidateNodesPredicateIncludeUnreadyExcludeUpgradingNodes = func(node *api_v1.Node) bool {
		return nodePredicateInternal(node, true, true)
	}
)
View Source 
var (
	KeyFunc = cache.DeletionHandlingMetaNamespaceKeyFunc
)

Functions

func BetaToAlphaHealthCheck added in v1.10.0 

func BetaToAlphaHealthCheck(hc *computebeta.HealthCheck) (*computealpha.HealthCheck, error)

BetaToAlphaHealthCheck converts beta health check to alpha health check. There should be no information lost after conversion.

func EqualMapping added in v1.2.2 

func EqualMapping(a, b *GCEURLMap) bool

EqualMapping returns true if both maps point to the same ServicePortIDs. ServicePort settings are *not* included in this comparison.

func EqualResourceIDs added in v1.2.2 

func EqualResourceIDs(a, b string) bool

EqualResourceIDs returns true if a and b have equal ResourceIDs which entail the project, location, resource type, and resource name.

func EqualResourcePaths added in v1.2.2 

func EqualResourcePaths(a, b string) bool

EqualResourcePaths returns true if a and b have equal ResourcePaths. Resource paths entail the location, resource type, and resource name.

func EqualStringSets added in v1.9.0 

func EqualStringSets(x, y []string) bool

EqualStringSets returns true if 2 given string slices contain the same elements, in any order.

func FakeGoogleAPIForbiddenErr 

func FakeGoogleAPIForbiddenErr() *googleapi.Error

FakeGoogleAPIForbiddenErr creates a Forbidden error with type googleapi.Error

func FakeGoogleAPINotFoundErr 

func FakeGoogleAPINotFoundErr() *googleapi.Error

FakeGoogleAPINotFoundErr creates a NotFound error with type googleapi.Error

func GetBasePath added in v1.13.0 

func GetBasePath(cloud *gce.Cloud) string

GetBasePath returns the compute API endpoint with the `projects/<project-id>` element compute API v0.36 changed basepath and dropped the `projects/` suffix, therefore suffix must be added back when generating compute resource urls.

func GetErrorType added in v1.11.2 

func GetErrorType(err error) string

func GetNodePrimaryIP added in v1.9.0 

func GetNodePrimaryIP(inputNode *api_v1.Node) string

GetNodePrimaryIP returns a primary internal IP address of the node.

func GetPortRanges added in v1.9.0 

func GetPortRanges(ports []int) (ranges []string)

GetPortRanges returns a list of port ranges, given a list of ports.

func GetPortsAndProtocol added in v1.9.0 

func GetPortsAndProtocol(svcPorts []api_v1.ServicePort) (ports []string, portRanges []string, protocol api_v1.Protocol)

GetPortsAndProtocol returns the list of ports, list of port ranges and the protocol given the list of k8s port info.

func GetReadyNodeNames added in v1.3.0 

func GetReadyNodeNames(lister listers.NodeLister) ([]string, error)

GetReadyNodeNames returns names of schedulable, ready nodes from the node lister It also filters out masters and nodes excluded from load-balancing TODO(rramkumar): Add a test for this.

func HasVIP added in v1.8.0 

func HasVIP(ing *networkingv1.Ingress) bool

HasVIP returns true if given ingress has a vip. 

func IGLinks(igs []*compute.InstanceGroup) (igLinks []string)

IGLinks returns a list of links extracted from the passed in list of compute.InstanceGroup's.

func IgnoreHTTPNotFound 

func IgnoreHTTPNotFound(err error) error

IgnoreHTTPNotFound returns the passed err if it's not a GoogleAPI error with a NotFound status code.

func IsForbiddenError 

func IsForbiddenError(err error) bool

IsForbiddenError returns true if the operation was forbidden

func IsGCEIngress added in v1.3.0 

func IsGCEIngress(ing *networkingv1.Ingress) bool

IsGCEIngress returns true if the Ingress matches the class managed by this controller.

func IsGCEL7ILBIngress added in v1.7.0 

func IsGCEL7ILBIngress(ing *networkingv1.Ingress) bool

IsGCEL7ILBIngress returns true if the given Ingress has ingress.class annotation set to "gce-l7-ilb"

func IsGCEMultiClusterIngress added in v1.3.0 

func IsGCEMultiClusterIngress(ing *networkingv1.Ingress) bool

IsGCEMultiClusterIngress returns true if the given Ingress has ingress.class annotation set to "gce-multi-cluster".

func IsGLBCIngress added in v1.3.2 

func IsGLBCIngress(ing *networkingv1.Ingress) bool

IsGLBCIngress returns true if the given Ingress should be processed by GLBC

func IsHTTPErrorCode 

func IsHTTPErrorCode(err error, code int) bool

IsHTTPErrorCode checks if the given error matches the given HTTP Error code. For this to work the error must be a googleapi Error.

func IsInUsedByError 

func IsInUsedByError(err error) bool

IsInUsedByError returns true if the resource is being used by another GCP resource

func IsLegacyL4ILBService added in v1.9.0 

func IsLegacyL4ILBService(svc *api_v1.Service) bool

IsLegacyL4ILBService returns true if the given LoadBalancer service is managed by service controller.

func IsNotFoundError 

func IsNotFoundError(err error) bool

IsNotFoundError returns true if the resource does not exist

func IsSubsettingL4ILBService added in v1.11.7 

func IsSubsettingL4ILBService(svc *api_v1.Service) bool

IsSubsettingL4ILBService returns true if the given LoadBalancer service is managed by NEG and L4 controller.

func JoinErrs added in v1.4.0 

func JoinErrs(errs []error) error

JoinErrs returns an aggregated error based on the passed in list of errors.

func KeyName added in v1.2.2 

func KeyName(url string) (string, error)

KeyName returns the name portion from a full or partial GCP resource URL. Example: 

Input:  https://googleapis.com/v1/compute/projects/my-project/global/backendServices/my-backend
Output: my-backend

func LegacyForwardingRuleName added in v1.11.7 

func LegacyForwardingRuleName(svc *api_v1.Service) string

func ListWithPredicate added in v1.10.0 

func ListWithPredicate(nodeLister listers.NodeLister, predicate NodeConditionPredicate) ([]*api_v1.Node, error)

ListWithPredicate gets nodes that matches predicate function.

func MakeL4ILBServiceDescription added in v1.9.0 

func MakeL4ILBServiceDescription(svcName, ip string, version meta.Version, shared bool) (string, error)

func NeedsCleanup added in v1.7.0 

func NeedsCleanup(ing *networkingv1.Ingress) bool

NeedsCleanup returns true if the ingress needs to have its associated resources deleted.

func NewInt64Pointer added in v1.9.9 

func NewInt64Pointer(i int64) *int64

NewInt64Pointer returns a pointer to the provided int64 literal

func NewNamespaceIndexer added in v1.3.0 

func NewNamespaceIndexer() cache.Indexers

NewNamespaceIndexer returns a new Indexer for use by SharedIndexInformers

func NewStringPointer added in v1.9.0 

func NewStringPointer(s string) *string

NewStringPointer returns a pointer to the provided string literal

func NodeIsReady 

func NodeIsReady(node *api_v1.Node) bool

NodeIsReady returns true if a node contains at least one condition of type "Ready"

func NumEndpoints added in v1.9.0 

func NumEndpoints(ep *api_v1.Endpoints) (result int)

NumEndpoints returns the count of endpoints in the given endpoints object.

func PrettyJson added in v1.2.2 

func PrettyJson(data interface{}) (string, error)

PrettyJson marshals an object in a human-friendly format.

func RelativeResourceName added in v1.2.2 

func RelativeResourceName(url string) (string, error)

RelativeResourceName returns the project, location, resource, and name from a full/partial GCP resource URL. This removes the endpoint prefix and version. Example: 

Input:  https://googleapis.com/v1/compute/projects/my-project/global/backendServices/my-backend
Output: projects/my-project/global/backendServices/my-backend

func ResourcePath added in v1.2.2 

func ResourcePath(url string) (string, error)

ResourcePath returns the location, resource and name portion from a full or partial GCP resource URL. This removes the endpoint prefix, version, and project. Example: 

Input:  https://googleapis.com/v1/compute/projects/my-project/global/backendServices/my-backend
Output: global/backendServices/my-backend

func ServiceKeyFunc added in v1.4.0 

func ServiceKeyFunc(namespace, name string) string

func SplitAnnotation added in v1.4.0 

func SplitAnnotation(annotation string) []string

SplitAnnotation splits annotation by separator and trims whitespace from each resulting token

func ToBetaHealthCheck added in v1.10.0 

func ToBetaHealthCheck(hc *computealpha.HealthCheck) (*computebeta.HealthCheck, error)

ToBetaHealthCheck converts alpha health check to beta health check.

func ToNamespacedName added in v1.2.2 

func ToNamespacedName(s string) (r types.NamespacedName, err error)

ToNamespacedName returns a types.NamespacedName struct parsed from namespace/name.

func ToV1HealthCheck added in v1.10.0 

func ToV1HealthCheck(hc *computealpha.HealthCheck) (*compute.HealthCheck, error)

ToV1HealthCheck converts alpha health check to v1 health check. WARNING: alpha health check has a additional PORT_SPECIFICATION field. This field will be omitted after conversion.

func TranslateAffinityType added in v1.9.0 

func TranslateAffinityType(affinityType string) string

TranslateAffinityType converts the k8s affinity type to the GCE affinity type.

func TraverseIngressBackends added in v1.3.2 

func TraverseIngressBackends(ing *networkingv1.Ingress, process func(id ServicePortID) bool)

TraverseIngressBackends traverse thru all backends specified in the input ingress and call process If process return true, then return and stop traversing the backends

func V1ToAlphaHealthCheck added in v1.10.0 

func V1ToAlphaHealthCheck(hc *compute.HealthCheck) (*computealpha.HealthCheck, error)

V1ToAlphaHealthCheck converts v1 health check to alpha health check. There should be no information lost after conversion.

func VerifyDescription added in v1.10.8 

func VerifyDescription(expectDesc NegDescription, descString, negName, zone string) (bool, error)

VerifyDescription returns whether the provided descString fields match Neg Description expectDesc. If an empty string or malformed description is provided, VerifyDescription will return true. When returning false, a detailed error will also be returned

Types

type Description added in v1.2.2 

type Description struct {
	ServiceName string   `json:"kubernetes.io/service-name"`
	ServicePort string   `json:"kubernetes.io/service-port"`
	XFeatures   []string `json:"x-features,omitempty"`
}

Description stores the description for a BackendService.

func DescriptionFromString added in v1.2.2 

func DescriptionFromString(descString string) *Description

DescriptionFromString gets a Description from string,

func (Description) String added in v1.2.2 

func (desc Description) String() string

String returns the string representation of a Description.

type FrontendGCAlgorithm added in v1.8.0 

type FrontendGCAlgorithm int

FrontendGCAlgorithm species GC algorithm used for ingress frontend resources. 

const (
	// NoCleanUpNeeded specifies that frontend resources need not be deleted.
	NoCleanUpNeeded FrontendGCAlgorithm = iota
	// CleanupV1FrontendResources specifies that frontend resources for ingresses
	// that use v1 naming scheme need to be deleted.
	CleanupV1FrontendResources
	// CleanupV2FrontendResources specifies that frontend resources for ingresses
	// that use v2 naming scheme need to be deleted.
	CleanupV2FrontendResources
	// CleanupV2FrontendResourcesScopeChange specifies that frontend resources for ingresses
	// that use v2 naming scheme and have changed their LB scope (e.g. ILB -> ELB or vice versa)
	// need to be deleted
	CleanupV2FrontendResourcesScopeChange
)

type GCEURLMap 

type GCEURLMap struct {
	DefaultBackend *ServicePort
	// HostRules is an ordered list of hostnames, path rule tuples.
	HostRules []HostRule
	// contains filtered or unexported fields
}

GCEURLMap is a simplified representation of a UrlMap somewhere in the middle of a compute.UrlMap and rules in an Ingress spec. This representation maintains three invariants/rules:

  1. All hostnames are unique
  2. All paths for a specific host are unique.
  3. Adding paths for a hostname replaces existing for that host.

func NewGCEURLMap added in v1.2.2 

func NewGCEURLMap() *GCEURLMap

NewGCEURLMap returns an empty GCEURLMap

func (*GCEURLMap) AllServicePorts added in v1.2.2 

func (g *GCEURLMap) AllServicePorts() (svcPorts []ServicePort)

AllServicePorts return a list of all ServicePorts contained in the GCEURLMap.

func (*GCEURLMap) HostExists added in v1.2.2 

func (g *GCEURLMap) HostExists(hostname string) bool

HostExists returns true if the given hostname is specified in the GCEURLMap.

func (*GCEURLMap) PathExists added in v1.2.2 

func (g *GCEURLMap) PathExists(hostname, path string) (ServicePort, bool)

PathExists returns true if the given path exists for the given hostname. It will also return the backend associated with that path.

func (*GCEURLMap) PutPathRulesForHost added in v1.2.2 

func (g *GCEURLMap) PutPathRulesForHost(hostname string, pathRules []PathRule)

PutPathRulesForHost adds path rules for a single hostname. This function ensures the invariants of the GCEURLMap are maintained. It will log if an invariant violation was found and reconciled. TODO(rramkumar): Surface an error instead of logging.

func (*GCEURLMap) String 

func (g *GCEURLMap) String() string

String dumps a readable version of the GCEURLMap.

type HostRule added in v1.3.0 

type HostRule struct {
	Hostname string
	Paths    []PathRule
}

HostRule encapsulates the Hostname and its list of PathRules.

type L4ILBResourceDescription added in v1.9.0 

type L4ILBResourceDescription struct {
	// ServiceName indicates the name of the service the resource is for.
	ServiceName string `json:"networking.gke.io/service-name"`
	// APIVersion stores the version og the compute API used to create this resource.
	APIVersion          meta.Version `json:"networking.gke.io/api-version,omitempty"`
	ServiceIP           string       `json:"networking.gke.io/service-ip,omitempty"`
	ResourceDescription string       `json:"networking.gke.io/resource-description,omitempty"`
}

L4ILBResourceDescription stores the description fields for L4 ILB resources. This is useful to indetify which resources correspond to which L4 ILB service.

func (*L4ILBResourceDescription) Marshal added in v1.9.0 

func (d *L4ILBResourceDescription) Marshal() (string, error)

Marshal returns the description as a JSON-encoded string.

func (*L4ILBResourceDescription) Unmarshal added in v1.9.0 

func (d *L4ILBResourceDescription) Unmarshal(desc string) error

Unmarshal converts the JSON-encoded description string into the struct.

type NegDescription added in v1.10.0 

type NegDescription struct {
	ClusterUID  string `json:"cluster-uid,omitempty"`
	Namespace   string `json:"namespace,omitempty"`
	ServiceName string `json:"service-name,omitempty"`
	Port        string `json:"port,omitempty"`
}

Description stores the description for a BackendService.

func NegDescriptionFromString added in v1.10.0 

func NegDescriptionFromString(descString string) (*NegDescription, error)

DescriptionFromString gets a Description from string,

func (NegDescription) String added in v1.10.0 

func (desc NegDescription) String() string

String returns the string representation of a Description.

type NodeConditionPredicate added in v1.10.0 

type NodeConditionPredicate func(node *api_v1.Node) bool

NodeConditionPredicate is a function that indicates whether the given node's conditions meet some set of criteria defined by the function.

type PathRule added in v1.2.2 

type PathRule struct {
	Path    string
	Backend ServicePort
}

PathRule encapsulates the information for a single path -> backend mapping.

type PeriodicTaskQueue 

type PeriodicTaskQueue struct {
	// contains filtered or unexported fields
}

PeriodicTaskQueue invokes the given sync function for every work item inserted. If the sync() function results in an error, the item is put on the work queue after a rate-limit.

func NewPeriodicTaskQueue 

func NewPeriodicTaskQueue(name, resource string, syncFn func(string) error) *PeriodicTaskQueue

NewPeriodicTaskQueue creates a new task queue with the default rate limiter.

func NewPeriodicTaskQueueWithLimiter added in v1.4.0 

func NewPeriodicTaskQueueWithLimiter(name, resource string, syncFn func(string) error, rl workqueue.RateLimiter) *PeriodicTaskQueue

NewPeriodicTaskQueueWithLimiter creates a new task queue with the given sync function and rate limiter. The sync function is called for every element inserted into the queue.

func (*PeriodicTaskQueue) Enqueue 

func (t *PeriodicTaskQueue) Enqueue(objs ...interface{})

Enqueue adds one or more keys to the work queue.

func (*PeriodicTaskQueue) Len added in v1.11.0 

func (t *PeriodicTaskQueue) Len() int

Len returns the length of the queue.

func (*PeriodicTaskQueue) NumRequeues added in v1.11.0 

func (t *PeriodicTaskQueue) NumRequeues(obj interface{}) int

NumRequeues returns the number of times the given item was requeued.

func (*PeriodicTaskQueue) Run 

func (t *PeriodicTaskQueue) Run()

Run runs the task queue. This will block until the Shutdown() has been called.

func (*PeriodicTaskQueue) Shutdown 

func (t *PeriodicTaskQueue) Shutdown()

Shutdown shuts down the work queue and waits for the worker to ACK

type PeriodicTaskQueueWithMultipleWorkers added in v1.11.0 

type PeriodicTaskQueueWithMultipleWorkers struct {
	// contains filtered or unexported fields
}

PeriodicTaskQueueWithMultipleWorkers invokes the given sync function for every work item inserted, while running n parallel worker routines. If the sync() function results in an error, the item is put on the work queue after a rate-limit.

func NewPeriodicTaskQueueWithMultipleWorkers added in v1.11.0 

func NewPeriodicTaskQueueWithMultipleWorkers(name, resource string, numWorkers int, syncFn func(string) error) *PeriodicTaskQueueWithMultipleWorkers

NewPeriodicTaskQueueWithMultipleWorkers creates a new task queue with the default rate limiter and the given number of worker goroutines.

func (*PeriodicTaskQueueWithMultipleWorkers) Enqueue added in v1.11.0 

func (t *PeriodicTaskQueueWithMultipleWorkers) Enqueue(objs ...interface{})

Enqueue adds one or more keys to the work queue.

func (*PeriodicTaskQueueWithMultipleWorkers) Len added in v1.11.0 

func (t *PeriodicTaskQueueWithMultipleWorkers) Len() int

Len returns the length of the queue.

func (*PeriodicTaskQueueWithMultipleWorkers) NumRequeues added in v1.11.0 

func (t *PeriodicTaskQueueWithMultipleWorkers) NumRequeues(obj interface{}) int

NumRequeues returns the number of times the given item was requeued.

func (*PeriodicTaskQueueWithMultipleWorkers) Run added in v1.11.0 

func (t *PeriodicTaskQueueWithMultipleWorkers) Run()

Run spawns off n parallel worker routines and returns immediately.

func (*PeriodicTaskQueueWithMultipleWorkers) Shutdown added in v1.11.0 

func (t *PeriodicTaskQueueWithMultipleWorkers) Shutdown()

Shutdown shuts down the work queue and waits for all the workers to ACK

type ServicePort added in v1.2.2 

type ServicePort struct {
	// Ingress backend-specified service name and port
	ID ServicePortID

	NodePort int64
	// Numerical port of the Service, retrieved from the Service
	Port int32
	// Name of the port of the Service, retrieved from the Service
	PortName       string
	Protocol       annotations.AppProtocol
	TargetPort     intstr.IntOrString
	NEGEnabled     bool
	VMIPNEGEnabled bool
	L7ILBEnabled   bool
	BackendConfig  *backendconfigv1.BackendConfig
	BackendNamer   namer.BackendNamer
	// Traffic policy fields that apply if non-nil.
	MaxRatePerEndpoint *float64
	CapacityScaler     *float64
}

ServicePort maintains configuration for a single backend.

func (*ServicePort) BackendName added in v1.2.2 

func (sp *ServicePort) BackendName() string

BackendName returns the name of the backend which would be used for this ServicePort.

func (*ServicePort) GetDescription added in v1.2.2 

func (sp *ServicePort) GetDescription() Description

GetDescription returns a Description for this ServicePort.

func (*ServicePort) IGName added in v1.8.0 

func (sp *ServicePort) IGName() string

IGName returns the name of the instance group which would be used for this ServicePort.

type ServicePortID added in v1.2.2 

type ServicePortID struct {
	Service types.NamespacedName
	Port    v1.ServiceBackendPort
}

ServicePortID contains the Service and Port fields.

func BackendToServicePortID added in v1.2.2 

func BackendToServicePortID(be v1.IngressBackend, namespace string) (ServicePortID, error)

BackendToServicePortID creates a ServicePortID from a given IngressBackend and namespace.

func (ServicePortID) String added in v1.2.3 

func (id ServicePortID) String() string

type TaskQueue 

type TaskQueue interface {
	Run()
	Enqueue(objs ...interface{})
	Shutdown()
	Len() int
	NumRequeues(obj interface{}) int
}

TaskQueue is a rate limited operation queue.

type TimeTracker added in v1.2.2 

type TimeTracker struct {
	// contains filtered or unexported fields
}

func NewTimeTracker added in v1.2.2 

func NewTimeTracker() TimeTracker

func (*TimeTracker) Get added in v1.2.2 

func (t *TimeTracker) Get() time.Time

Get returns previous recorded time

func (*TimeTracker) Set added in v1.2.2 

func (t *TimeTracker) Set(timestamp time.Time)

Set records input timestamp

func (*TimeTracker) Track added in v1.2.2 

func (t *TimeTracker) Track() time.Time

Track records the current time and returns it

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