garbagecollector

Documentation

Index

• Constants
• Variables
• func DefaultIgnoredResources() map[schema.GroupResource]struct{}
• 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) HasSynced() 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 DefaultIgnoredResources

func DefaultIgnoredResources() map[schema.GroupResource]struct{}

DefaultIgnoredResources returns the default set of resources that the garbage collector controller should ignore. This is exposed so downstream integrators can have access to the defaults, and add to them as necessary when constructing the controller.

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{},
	ignoredResources map[schema.GroupResource]struct{},
	sharedInformers informers.SharedInformerFactory,
) (*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) HasSynced

func (gc *GarbageCollector) HasSynced() bool

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.