garbagecollector

Documentation

Index

• Constants
• Variables
• func Register()
• type GarbageCollector
  • func NewGarbageCollector(metaOnlyClientPool dynamic.ClientPool, clientPool dynamic.ClientPool, ...) (*GarbageCollector, error)
  • func (gc *GarbageCollector) GraphHasUID(UIDs []types.UID) bool
  • func (gc *GarbageCollector) Run(workers int, stopCh <-chan struct{})
• type GraphBuilder
  • func (gb *GraphBuilder) HasSynced() bool
  • func (gb *GraphBuilder) Run(stopCh <-chan struct{})
• type RegisteredRateLimiter
  • func NewRegisteredRateLimiter(resources map[schema.GroupVersionResource]struct{}) *RegisteredRateLimiter
• type UIDCache
  • func NewUIDCache(maxCacheEntries int) *UIDCache
  • func (c *UIDCache) Add(uid types.UID)
  • func (c *UIDCache) Has(uid types.UID) bool

Constants

const (
	GarbageCollectSubsystem    = "garbage_collector"
	EventProcessingLatencyKey  = "event_processing_latency_microseconds"
	DirtyProcessingLatencyKey  = "dirty_processing_latency_microseconds"
	OrphanProcessingLatencyKey = "orphan_processing_latency_microseconds"
)

const ResourceResyncTime time.Duration = 0

Variables

var (
	EventProcessingLatency = prometheus.NewSummary(
		prometheus.SummaryOpts{
			Subsystem: GarbageCollectSubsystem,
			Name:      EventProcessingLatencyKey,
			Help:      "Time in microseconds of an event spend in the eventQueue",
		},
	)
	DirtyProcessingLatency = prometheus.NewSummary(
		prometheus.SummaryOpts{
			Subsystem: GarbageCollectSubsystem,
			Name:      DirtyProcessingLatencyKey,
			Help:      "Time in microseconds of an item spend in the dirtyQueue",
		},
	)
	OrphanProcessingLatency = prometheus.NewSummary(
		prometheus.SummaryOpts{
			Subsystem: GarbageCollectSubsystem,
			Name:      OrphanProcessingLatencyKey,
			Help:      "Time in microseconds of an item spend in the orphanQueue",
		},
	)
)

Functions

func Register

func Register()

Register all metrics.

Types

type GarbageCollector

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

GarbageCollector runs reflectors to watch for changes of managed API objects, funnels the results to a single-threaded dependencyGraphBuilder, which builds a graph caching the dependencies among objects. Triggered by the graph changes, the dependencyGraphBuilder enqueues objects that can potentially be garbage-collected to the `attemptToDelete` queue, and enqueues objects whose dependents need to be orphaned to the `attemptToOrphan` queue. The GarbageCollector has workers who consume these two queues, send requests to the API server to delete/update the objects accordingly. Note that having the dependencyGraphBuilder notify the garbage collector ensures that the garbage collector operates with a graph that is at least as up to date as the notification is sent.

func NewGarbageCollector

func NewGarbageCollector(metaOnlyClientPool dynamic.ClientPool, clientPool dynamic.ClientPool, mapper meta.RESTMapper, deletableResources map[schema.GroupVersionResource]struct{}) (*GarbageCollector, error)

func (*GarbageCollector) GraphHasUID

func (gc *GarbageCollector) GraphHasUID(UIDs []types.UID) bool

*FOR TEST USE ONLY* GraphHasUID returns if the GraphBuilder has a particular UID store in its uidToNode graph. It's useful for debugging. This method is used by integration tests.

func (*GarbageCollector) Run

func (gc *GarbageCollector) Run(workers int, stopCh <-chan struct{})

type GraphBuilder

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

GraphBuilder: based on the events supplied by the informers, GraphBuilder updates uidToNode, a graph that caches the dependencies as we know, and enqueues items to the attemptToDelete and attemptToOrphan.

func (*GraphBuilder) HasSynced

func (gb *GraphBuilder) HasSynced() bool

func (*GraphBuilder) Run

func (gb *GraphBuilder) Run(stopCh <-chan struct{})

type RegisteredRateLimiter

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

RegisteredRateLimiter records the registered RateLimters to avoid duplication.

func NewRegisteredRateLimiter

func NewRegisteredRateLimiter(resources map[schema.GroupVersionResource]struct{}) *RegisteredRateLimiter

NewRegisteredRateLimiter returns a new RegisteredRateLimiater. TODO: NewRegisteredRateLimiter is not dynamic. We need to find a better way when GC dynamically change the resources it monitors.

type UIDCache

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

UIDCache is an LRU cache for uid.

func NewUIDCache

func NewUIDCache(maxCacheEntries int) *UIDCache

NewUIDCache returns a UIDCache.

func (*UIDCache) Add

func (c *UIDCache) Add(uid types.UID)

Add adds a uid to the cache.

func (*UIDCache) Has

func (c *UIDCache) Has(uid types.UID) bool

Has returns if a uid is in the cache.