// StartOnce starts pod volume calc that will occur periodically in the background until s.StopOnce is called
func (s *volumeStatCalculator) StartOnce() *volumeStatCalculator {
s.startO.Do(func() {
go wait.JitterUntil(func() {
s.calcAndStoreStats()
}, s.jitterPeriod, 1.0, true, s.stopChannel)
})
return s
}
// acquire loops calling tryAcquireOrRenew and returns immediately when tryAcquireOrRenew succeeds.
func (le *LeaderElector) acquire() {
stop := make(chan struct{})
glog.Infof("attempting to acquire leader lease...")
wait.JitterUntil(func() {
succeeded := le.tryAcquireOrRenew()
le.maybeReportTransition()
desc := le.config.Lock.Describe()
if !succeeded {
glog.V(4).Infof("failed to acquire lease %v", desc)
return
}
le.config.Lock.RecordEvent("became leader")
glog.Infof("successfully acquired lease %v", desc)
close(stop)
}, le.config.RetryPeriod, JitterFactor, true, stop)
}