Exemplo n.º 1
0
// this function will make the agent a candidate to receive job offers.
func (a *Agent) advertiseExecutorRoleTask() *task.Task {
	t := task.New("advertiseExecutorRoleTask", func() error {
		a.log("Renewing my executor role...")
		return a.clusterClient.RegisterAsExecutor(a.ID, a.IPv4)
	})

	t.RunEvery(time.Second * cluster.HEARTBEAT)
	a.taskManager.RegisterTask(t)
	return t
}
Exemplo n.º 2
0
// This function register the leader (aka scheduler) IP periodically.
// Keep in mind that the "title" of leader expires every `SCHEDULER_LEADER_TTL`
// and it has to be renewed. Fail to do that, the rest of cluster will compete
// again for a leaders position.
func (a *Agent) advertiseSchedulerRoleTask() *task.Task {
	t := task.New("advertiseSchedulerRoleTask", func() error {
		a.log("Renewing my leader role...")
		_, err := a.clusterClient.RegisterAsScheduler(a.IPv4)
		return err
	})
	t.RunEvery(time.Second * cluster.HEARTBEAT)
	a.taskManager.RegisterTask(t)
	return t
}
Exemplo n.º 3
0
func (a *Agent) watchForSchedulerFailureTask() *task.Task {
	notifyC := make(chan bool, 1)
	watchLeaderStopC := make(chan bool, 1)

	t := task.New("watchForSchedulerFailureTask", func() error {
		a.clusterClient.SchedulerFailureWatcher(notifyC, watchLeaderStopC)
		<-notifyC
		return nil
	})

	t.OnStopFn(func() {
		watchLeaderStopC <- true
	})
	t.RunOnce()
	a.taskManager.RegisterTask(t)
	return t
}
Exemplo n.º 4
0
// This function will be run by the leader only, and it will manage the job scheduler
// and by extent, the publication of job offers
func (a *Agent) publishJobOffersTask() *task.Task {
	dueJobC := make(chan *scheduler.Job, 10)
	stopDueJobC := make(chan bool)

	t := task.New("publishJobOffersTask", func() error {
		a.jobScheduler.Notify(dueJobC, stopDueJobC)
		for job := range dueJobC {
			a.logf("Publishing jobOffer: %s ...", job.ToString())
			a.clusterClient.MakeJobOffer(job)
		}
		return nil
	})
	t.OnStopFn(func() {
		stopDueJobC <- true
	})
	t.RunOnce()
	a.taskManager.RegisterTask(t)
	return t
}
Exemplo n.º 5
0
func (a *Agent) watchForJobOffersTask() *task.Task {
	jobOfferC := make(chan *scheduler.Job, 1)
	jobOfferStopC := make(chan bool, 1)
	t := task.New("watchForJobOffersTask", func() error {
		go a.clusterClient.WatchJobOffers(jobOfferC, jobOfferStopC)
		for jobOffer := range jobOfferC {
			if jobOffer != nil && a.clusterClient.TakeJobOffer(jobOffer, a.IPv4) {
				a.logf("Executing jobOffer: [%s]", jobOffer.ToString())
				go a.jobSupervisor.RunIt(jobOffer)
			}
		}
		return nil
	})
	t.OnStopFn(func() {
		jobOfferStopC <- true
	})
	t.RunOnce()
	a.taskManager.RegisterTask(t)
	return t
}
Exemplo n.º 6
0
func (c *Configurator) addWatchOnChangeProxy() *task.Task {
	proxyChangesC := make(chan proxy.ApiProxySpec, 100)
	stopC := make(chan bool, 1)

	proxyWatcherTask := task.New("addWatchOnChangeProxy", func() error {
		go c.backend.WatchProxyChanges(proxyChangesC, stopC)
		for newProxy := range proxyChangesC {
			if newProxy != nil {
				c.observer.OnChangeProxy(newProxy)
			}
		}
		return nil
	})
	proxyWatcherTask.OnStopFn(func() {
		stopC <- true
	})
	proxyWatcherTask.RunOnce()
	c.taskManager.RegisterTask(proxyWatcherTask)

	return proxyWatcherTask
}
Exemplo n.º 7
0
// This function listen for new jobs pending for scheduling
func (a *Agent) watchForJobsToScheduleTask() *task.Task {
	unscheduledJobsC := make(chan *scheduler.Job, 100)
	stopDueJobC := make(chan bool, 1)

	t := task.New("watchForJobsToScheduleTask", func() error {
		go a.clusterClient.WatchJobsToSchedule(unscheduledJobsC, stopDueJobC)

		a.log("Job sentinel activated")
		for unscheduledJob := range unscheduledJobsC {
			if unscheduledJob != nil {
				a.logf("Scheduling job: %s (due in %f)...", unscheduledJob.ToString(), unscheduledJob.WaitSecs())
				a.jobScheduler.Enqueue(unscheduledJob)
			}
		}
		return nil
	})
	t.OnStopFn(func() {
		stopDueJobC <- true
	})
	t.RunOnce()
	a.taskManager.RegisterTask(t)
	return t
}