func EventAggregatorByReasonFunc(event *v1.Event) (string, string)
EventAggregatorByReasonFunc aggregates events by exact match on event.Source, event.InvolvedObject, event.Type, event.Reason, event.ReportingController and event.ReportingInstance
func EventAggregatorByReasonMessageFunc(event *v1.Event) string
EventAggregatorByReasonMessageFunc returns an aggregate message by prefixing the incoming message
type BroadcasterOption func(*config)
func WithContext(ctx context.Context) BroadcasterOption
WithContext sets a context for the broadcaster. Canceling the context will shut down the broadcaster, Shutdown doesn't need to be called. The context can also be used to provide a logger.
func WithCorrelatorOptions(options CorrelatorOptions) BroadcasterOption
func WithSleepDuration(sleepDuration time.Duration) BroadcasterOption
CorrelatorOptions allows you to change the default of the EventSourceObjectSpamFilter and EventAggregator in EventCorrelator
type CorrelatorOptions struct {
// The lru cache size used for both EventSourceObjectSpamFilter and the EventAggregator
// If not specified (zero value), the default specified in events_cache.go will be picked
// This means that the LRUCacheSize has to be greater than 0.
LRUCacheSize int
// The burst size used by the token bucket rate filtering in EventSourceObjectSpamFilter
// If not specified (zero value), the default specified in events_cache.go will be picked
// This means that the BurstSize has to be greater than 0.
BurstSize int
// The fill rate of the token bucket in queries per second in EventSourceObjectSpamFilter
// If not specified (zero value), the default specified in events_cache.go will be picked
// This means that the QPS has to be greater than 0.
QPS float32
// The func used by the EventAggregator to group event keys for aggregation
// If not specified (zero value), EventAggregatorByReasonFunc will be used
KeyFunc EventAggregatorKeyFunc
// The func used by the EventAggregator to produced aggregated message
// If not specified (zero value), EventAggregatorByReasonMessageFunc will be used
MessageFunc EventAggregatorMessageFunc
// The number of events in an interval before aggregation happens by the EventAggregator
// If not specified (zero value), the default specified in events_cache.go will be picked
// This means that the MaxEvents has to be greater than 0
MaxEvents int
// The amount of time in seconds that must transpire since the last occurrence of a similar event before it is considered new by the EventAggregator
// If not specified (zero value), the default specified in events_cache.go will be picked
// This means that the MaxIntervalInSeconds has to be greater than 0
MaxIntervalInSeconds int
// The clock used by the EventAggregator to allow for testing
// If not specified (zero value), clock.RealClock{} will be used
Clock clock.PassiveClock
// The func used by EventFilterFunc, which returns a key for given event, based on which filtering will take place
// If not specified (zero value), getSpamKey will be used
SpamKeyFunc EventSpamKeyFunc
}
EventAggregator identifies similar events and aggregates them into a single event
type EventAggregator struct {
sync.RWMutex
// contains filtered or unexported fields
}
func NewEventAggregator(lruCacheSize int, keyFunc EventAggregatorKeyFunc, messageFunc EventAggregatorMessageFunc, maxEvents int, maxIntervalInSeconds int, clock clock.PassiveClock) *EventAggregator
NewEventAggregator returns a new instance of an EventAggregator
func (e *EventAggregator) EventAggregate(newEvent *v1.Event) (*v1.Event, string)
EventAggregate checks if a similar event has been seen according to the aggregation configuration (max events, max interval, etc) and returns:
EventAggregatorKeyFunc is responsible for grouping events for aggregation It returns a tuple of the following: aggregateKey - key the identifies the aggregate group to bucket this event localKey - key that makes this event in the local group
type EventAggregatorKeyFunc func(event *v1.Event) (aggregateKey string, localKey string)
EventAggregatorMessageFunc is responsible for producing an aggregation message
type EventAggregatorMessageFunc func(event *v1.Event) string
EventBroadcaster knows how to receive events and send them to any EventSink, watcher, or log.
type EventBroadcaster interface {
// StartEventWatcher starts sending events received from this EventBroadcaster to the given
// event handler function. The return value can be ignored or used to stop recording, if
// desired.
StartEventWatcher(eventHandler func(*v1.Event)) watch.Interface
// StartRecordingToSink starts sending events received from this EventBroadcaster to the given
// sink. The return value can be ignored or used to stop recording, if desired.
StartRecordingToSink(sink EventSink) watch.Interface
// StartLogging starts sending events received from this EventBroadcaster to the given logging
// function. The return value can be ignored or used to stop recording, if desired.
StartLogging(logf func(format string, args ...interface{})) watch.Interface
// StartStructuredLogging starts sending events received from this EventBroadcaster to the structured
// logging function. The return value can be ignored or used to stop recording, if desired.
StartStructuredLogging(verbosity klog.Level) watch.Interface
// NewRecorder returns an EventRecorder that can be used to send events to this EventBroadcaster
// with the event source set to the given event source.
NewRecorder(scheme *runtime.Scheme, source v1.EventSource) EventRecorderLogger
// Shutdown shuts down the broadcaster. Once the broadcaster is shut
// down, it will only try to record an event in a sink once before
// giving up on it with an error message.
Shutdown()
}
func NewBroadcaster(opts ...BroadcasterOption) EventBroadcaster
Creates a new event broadcaster.
func NewBroadcasterForTests(sleepDuration time.Duration) EventBroadcaster
func NewBroadcasterWithCorrelatorOptions(options CorrelatorOptions) EventBroadcaster
EventCorrelateResult is the result of a Correlate
type EventCorrelateResult struct {
// the event after correlation
Event *v1.Event
// if provided, perform a strategic patch when updating the record on the server
Patch []byte
// if true, do no further processing of the event
Skip bool
}
EventCorrelator processes all incoming events and performs analysis to avoid overwhelming the system. It can filter all incoming events to see if the event should be filtered from further processing. It can aggregate similar events that occur frequently to protect the system from spamming events that are difficult for users to distinguish. It performs de-duplication to ensure events that are observed multiple times are compacted into a single event with increasing counts.
type EventCorrelator struct {
// contains filtered or unexported fields
}
func NewEventCorrelator(clock clock.PassiveClock) *EventCorrelator
NewEventCorrelator returns an EventCorrelator configured with default values.
The EventCorrelator is responsible for event filtering, aggregating, and counting prior to interacting with the API server to record the event.
The default behavior is as follows:
func NewEventCorrelatorWithOptions(options CorrelatorOptions) *EventCorrelator
func (c *EventCorrelator) EventCorrelate(newEvent *v1.Event) (*EventCorrelateResult, error)
EventCorrelate filters, aggregates, counts, and de-duplicates all incoming events
func (c *EventCorrelator) UpdateState(event *v1.Event)
UpdateState based on the latest observed state from server
EventFilterFunc is a function that returns true if the event should be skipped
type EventFilterFunc func(event *v1.Event) bool
EventRecorder knows how to record events on behalf of an EventSource.
type EventRecorder interface {
// Event constructs an event from the given information and puts it in the queue for sending.
// 'object' is the object this event is about. Event will make a reference-- or you may also
// pass a reference to the object directly.
// 'eventtype' of this event, and can be one of Normal, Warning. New types could be added in future
// 'reason' is the reason this event is generated. 'reason' should be short and unique; it
// should be in UpperCamelCase format (starting with a capital letter). "reason" will be used
// to automate handling of events, so imagine people writing switch statements to handle them.
// You want to make that easy.
// 'message' is intended to be human readable.
//
// The resulting event will be created in the same namespace as the reference object.
Event(object runtime.Object, eventtype, reason, message string)
// Eventf is just like Event, but with Sprintf for the message field.
Eventf(object runtime.Object, eventtype, reason, messageFmt string, args ...interface{})
// AnnotatedEventf is just like eventf, but with annotations attached
AnnotatedEventf(object runtime.Object, annotations map[string]string, eventtype, reason, messageFmt string, args ...interface{})
}
EventRecorderAdapter is a wrapper around a "k8s.io/client-go/tools/record".EventRecorder implementing the new "k8s.io/client-go/tools/events".EventRecorder interface.
type EventRecorderAdapter struct {
// contains filtered or unexported fields
}
func NewEventRecorderAdapter(recorder EventRecorderLogger) *EventRecorderAdapter
NewEventRecorderAdapter returns an adapter implementing the new "k8s.io/client-go/tools/events".EventRecorder interface.
func (a *EventRecorderAdapter) Eventf(regarding, _ runtime.Object, eventtype, reason, action, note string, args ...interface{})
Eventf is a wrapper around v1 Eventf
func (a *EventRecorderAdapter) WithLogger(logger klog.Logger) internalevents.EventRecorderLogger
EventRecorderLogger extends EventRecorder such that a logger can be set for methods in EventRecorder. Normally, those methods uses the global default logger to record errors and debug messages. If that is not desired, use WithLogger to provide a logger instance.
type EventRecorderLogger interface {
EventRecorder
// WithLogger replaces the context used for logging. This is a cheap call
// and meant to be used for contextual logging:
// recorder := ...
// logger := klog.FromContext(ctx)
// recorder.WithLogger(logger).Eventf(...)
WithLogger(logger klog.Logger) EventRecorderLogger
}
EventSink knows how to store events (client.Client implements it.) EventSink must respect the namespace that will be embedded in 'event'. It is assumed that EventSink will return the same sorts of errors as pkg/client's REST client.
type EventSink interface {
Create(event *v1.Event) (*v1.Event, error)
Update(event *v1.Event) (*v1.Event, error)
Patch(oldEvent *v1.Event, data []byte) (*v1.Event, error)
}
EventSourceObjectSpamFilter is responsible for throttling the amount of events a source and object can produce.
type EventSourceObjectSpamFilter struct {
sync.RWMutex
// contains filtered or unexported fields
}
func NewEventSourceObjectSpamFilter(lruCacheSize, burst int, qps float32, clock clock.PassiveClock, spamKeyFunc EventSpamKeyFunc) *EventSourceObjectSpamFilter
NewEventSourceObjectSpamFilter allows burst events from a source about an object with the specified qps refill.
func (f *EventSourceObjectSpamFilter) Filter(event *v1.Event) bool
Filter controls that a given source+object are not exceeding the allowed rate.
EventSpamKeyFunc is a function that returns unique key based on provided event
type EventSpamKeyFunc func(event *v1.Event) string
FakeRecorder is used as a fake during tests. It is thread safe. It is usable when created manually and not by NewFakeRecorder, however all events may be thrown away in this case.
type FakeRecorder struct {
Events chan string
IncludeObject bool
}
func NewFakeRecorder(bufferSize int) *FakeRecorder
NewFakeRecorder creates new fake event recorder with event channel with buffer of given size.
func (f *FakeRecorder) AnnotatedEventf(object runtime.Object, annotations map[string]string, eventtype, reason, messageFmt string, args ...interface{})
func (f *FakeRecorder) Event(object runtime.Object, eventtype, reason, message string)
func (f *FakeRecorder) Eventf(object runtime.Object, eventtype, reason, messageFmt string, args ...interface{})
func (f *FakeRecorder) WithLogger(logger klog.Logger) EventRecorderLogger