コード例 #1
0
// monitorReachability is a hostMonitoringFunc responsible for seeing if
// hosts are reachable or not. returns a slice of any errors that occur
func monitorReachability(settings *evergreen.Settings) []error {

	evergreen.Logger.Logf(slogger.INFO, "Running reachability checks...")

	// used to store any errors that occur
	var errors []error

	// fetch all hosts that have not been checked recently
	// (> 10 minutes ago)
	threshold := time.Now().Add(-ReachabilityCheckInterval)
	hosts, err := host.Find(host.ByNotMonitoredSince(threshold))
	if err != nil {
		errors = append(errors, fmt.Errorf("error finding hosts not"+
			" monitored recently: %v", err))
		return errors
	}

	// check all of the hosts. continue on error so that other hosts can be
	// checked successfully
	for _, host := range hosts {

		if err := checkHostReachability(host, settings); err != nil {
			errors = append(errors, fmt.Errorf("error checking reachability"+
				" for host %v: %v", host.Id, err))
			continue
		}

	}

	evergreen.Logger.Logf(slogger.INFO, "Finished running host reachability checks")

	return errors
}
コード例 #2
0
ファイル: host_monitoring.go プロジェクト: tychoish/evergreen
// monitorReachability is a hostMonitoringFunc responsible for seeing if
// hosts are reachable or not. returns a slice of any errors that occur
func monitorReachability(settings *evergreen.Settings) []error {

	evergreen.Logger.Logf(slogger.INFO, "Running reachability checks...")

	// used to store any errors that occur
	var errors []error

	// fetch all hosts that have not been checked recently
	// (> 10 minutes ago)
	threshold := time.Now().Add(-ReachabilityCheckInterval)
	hosts, err := host.Find(host.ByNotMonitoredSince(threshold))
	if err != nil {
		errors = append(errors, fmt.Errorf("error finding hosts not monitored recently: %v", err))
		return errors
	}

	workers := NumReachabilityWorkers
	if len(hosts) < workers {
		workers = len(hosts)
	}

	wg := sync.WaitGroup{}

	wg.Add(workers)

	hostsChan := make(chan host.Host, workers)
	errChan := make(chan error, workers)

	for i := 0; i < workers; i++ {
		go func() {
			defer wg.Done()
			for host := range hostsChan {
				if err := checkHostReachability(host, settings); err != nil {
					errChan <- err
				}
			}
		}()
	}

	errDone := make(chan struct{})
	go func() {
		defer close(errDone)
		for err := range errChan {
			errors = append(errors, fmt.Errorf("error checking reachability: %v", err))
		}
	}()

	// check all of the hosts. continue on error so that other hosts can be
	// checked successfully
	for _, host := range hosts {
		hostsChan <- host
	}
	close(hostsChan)
	wg.Wait()
	close(errChan)

	<-errDone
	return errors
}