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Package endpoint

v1.18.6
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Published: Jul 15, 2020 | License: Apache-2.0 | Module: k8s.io/kubernetes

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func DeepHashObjectToString

func DeepHashObjectToString(objectToWrite interface{}) string

DeepHashObjectToString creates a unique hash string from a go object.

func GetPodFromDeleteAction

func GetPodFromDeleteAction(obj interface{}) *v1.Pod

GetPodFromDeleteAction returns a pointer to a pod if one can be derived from obj (could be a *v1.Pod, or a DeletionFinalStateUnknown marker item).

func GetServicesToUpdateOnPodChange

func GetServicesToUpdateOnPodChange(serviceLister v1listers.ServiceLister, selectorCache *ServiceSelectorCache, old, cur interface{}, endpointChanged EndpointsMatch) sets.String

GetServicesToUpdateOnPodChange returns a set of Service keys for Services that have potentially been affected by a change to this pod.

func PodChanged

func PodChanged(oldPod, newPod *v1.Pod, endpointChanged EndpointsMatch) (bool, bool)

PodChanged returns two boolean values, the first returns true if the pod. has changed, the second value returns true if the pod labels have changed.

func ShouldPodBeInEndpoints

func ShouldPodBeInEndpoints(pod *v1.Pod, publishNotReady bool) bool

ShouldPodBeInEndpoints returns true if a specified pod should be in an endpoints object. Terminating pods are only included if publishNotReady is true.

func ShouldSetHostname

func ShouldSetHostname(pod *v1.Pod, svc *v1.Service) bool

ShouldSetHostname returns true if the Hostname attribute should be set on an Endpoints Address or EndpointSlice Endpoint.

type EndpointsMatch

type EndpointsMatch func(*v1.Pod, *v1.Pod) bool

EndpointsMatch is a type of function that returns true if pod endpoints match.

type PortMapKey

type PortMapKey string

PortMapKey is used to uniquely identify groups of endpoint ports.

func NewPortMapKey

func NewPortMapKey(endpointPorts []discovery.EndpointPort) PortMapKey

NewPortMapKey generates a PortMapKey from endpoint ports.

type ServiceKey

type ServiceKey struct {
	// namespace, name composing a namespaced name - an unique identifier of every Service.
	Namespace, Name string
}

ServiceKey is a key uniquely identifying a Service.

type ServiceSelectorCache

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

ServiceSelectorCache is a cache of service selectors to avoid high CPU consumption caused by frequent calls to AsSelectorPreValidated (see #73527)

func NewServiceSelectorCache

func NewServiceSelectorCache() *ServiceSelectorCache

NewServiceSelectorCache init ServiceSelectorCache for both endpoint controller and endpointSlice controller.

func (*ServiceSelectorCache) Delete

func (sc *ServiceSelectorCache) Delete(key string)

Delete can delete selector which exist in ServiceSelectorCache.

func (*ServiceSelectorCache) Get

func (sc *ServiceSelectorCache) Get(key string) (labels.Selector, bool)

Get return selector and existence in ServiceSelectorCache by key.

func (*ServiceSelectorCache) GetPodServiceMemberships

func (sc *ServiceSelectorCache) GetPodServiceMemberships(serviceLister v1listers.ServiceLister, pod *v1.Pod) (sets.String, error)

GetPodServiceMemberships returns a set of Service keys for Services that have a selector matching the given pod.

func (*ServiceSelectorCache) Update

func (sc *ServiceSelectorCache) Update(key string, rawSelector map[string]string) labels.Selector

Update can update or add a selector in ServiceSelectorCache while service's selector changed.

type ServiceState

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

ServiceState represents a state of an Service object that is known to this util.

type TriggerTimeTracker

type TriggerTimeTracker struct {
	// ServiceStates is a map, indexed by Service object key, storing the last
	// known Service object state observed during the most recent call of the
	// ComputeEndpointLastChangeTriggerTime function.
	ServiceStates map[ServiceKey]ServiceState
	// contains filtered or unexported fields
}

TriggerTimeTracker is used to compute an EndpointsLastChangeTriggerTime annotation. See the documentation for that annotation for more details.

Please note that this util may compute a wrong EndpointsLastChangeTriggerTime if the same object changes multiple times between two consecutive syncs. We're aware of this limitation but we decided to accept it, as fixing it would require a major rewrite of the endpoint(Slice) controller and Informer framework. Such situations, i.e. frequent updates of the same object in a single sync period, should be relatively rare and therefore this util should provide a good approximation of the EndpointsLastChangeTriggerTime.

func NewTriggerTimeTracker

func NewTriggerTimeTracker() *TriggerTimeTracker

NewTriggerTimeTracker creates a new instance of the TriggerTimeTracker.

func (*TriggerTimeTracker) ComputeEndpointLastChangeTriggerTime

func (t *TriggerTimeTracker) ComputeEndpointLastChangeTriggerTime(
	namespace string, service *v1.Service, pods []*v1.Pod) time.Time

ComputeEndpointLastChangeTriggerTime updates the state of the Service/Endpoint object being synced and returns the time that should be exported as the EndpointsLastChangeTriggerTime annotation.

If the method returns a 'zero' time the EndpointsLastChangeTriggerTime annotation shouldn't be exported.

Please note that this function may compute a wrong value if the same object (pod/service) changes multiple times between two consecutive syncs.

Important: This method is go-routing safe but only when called for different keys. The method shouldn't be called concurrently for the same key! This contract is fulfilled in the current implementation of the endpoint(slice) controller.

func (*TriggerTimeTracker) DeleteService

func (t *TriggerTimeTracker) DeleteService(namespace, name string)

DeleteService deletes service state stored in this util.

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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