kubernetes/pkg/controlplane/controller/apiserverleasegc/gc_controller.go

type Controller …

// NewAPIServerLeaseGC creates a new Controller.
func NewAPIServerLeaseGC(clientset kubernetes.Interface, gcCheckPeriod time.Duration, leaseNamespace, leaseLabelSelector string) *Controller { … }

// Run starts one worker.
func (c *Controller) Run(stopCh <-chan struct{ … }

func (c *Controller) gc() { … }

func isLeaseExpired(lease *v1.Lease) bool { … }