Ejemplo n.º 1
0
// Run triggers periodic syncing of services and checks with Consul.  This is
// a long lived go-routine which is stopped during shutdown.
func (c *Syncer) Run() {
	sync := time.NewTimer(0)
	for {
		select {
		case <-sync.C:
			d := syncInterval - lib.RandomStagger(syncInterval/syncJitter)
			sync.Reset(d)

			if err := c.SyncServices(); err != nil {
				if c.consulAvailable {
					c.logger.Printf("[DEBUG] consul.syncer: error in syncing: %v", err)
				}
				c.consulAvailable = false
			} else {
				if !c.consulAvailable {
					c.logger.Printf("[DEBUG] consul.syncer: syncs succesful")
				}
				c.consulAvailable = true
			}
		case <-c.notifySyncCh:
			sync.Reset(syncInterval)
		case <-c.shutdownCh:
			c.Shutdown()
		case <-c.notifyShutdownCh:
			sync.Stop()
			c.logger.Printf("[INFO] consul.syncer: shutting down syncer ")
			return
		}
	}
}
Ejemplo n.º 2
0
// StartDiskWatcher periodically checks the disk space consumed by the shared
// allocation directory.
func (d *AllocDir) StartDiskWatcher() {
	start := time.Now()

	sync := time.NewTimer(d.MaxCheckDiskInterval)
	defer sync.Stop()

	d.running = true
	d.watchCh = make(chan struct{})

	for {
		select {
		case <-d.watchCh:
			return
		case <-sync.C:
			if err := d.syncDiskUsage(); err != nil {
				log.Printf("[WARN] client: failed to sync disk usage: %v", err)
			}
			// Calculate the disk ratio.
			diskRatio := float64(d.size) / float64(d.MaxSize*structs.BytesInMegabyte)

			// Exponentially decrease the interval when the disk ratio increases.
			nextInterval := time.Duration(int64(1.0/(0.1*math.Pow(diskRatio, 2))+5)) * time.Second

			// Use the maximum interval for the first five minutes or if the
			// disk ratio is sufficiently high. Also use the minimum check interval
			// if the disk ratio becomes low enough.
			if nextInterval < d.MaxCheckDiskInterval || time.Since(start) < d.CheckDiskMaxEnforcePeriod {
				nextInterval = d.MaxCheckDiskInterval
			} else if nextInterval > d.MinCheckDiskInterval {
				nextInterval = d.MinCheckDiskInterval
			}
			sync.Reset(nextInterval)
		}
	}
}
Ejemplo n.º 3
0
// syncConsul removes services of tasks which are no longer in running state
func (c *Client) syncConsul() {
	sync := time.NewTicker(consulSyncInterval)
	for {
		select {
		case <-sync.C:
			// Give up pruning services if we can't fingerprint Consul

			c.configLock.RLock()
			_, ok := c.configCopy.Node.Attributes["consul.server"]
			c.configLock.RUnlock()
			if !ok {
				continue
			}
			services := make(map[string]struct{})
			// Get the existing allocs
			c.allocLock.RLock()
			allocs := make([]*AllocRunner, 0, len(c.allocs))
			for _, ar := range c.allocs {
				allocs = append(allocs, ar)
			}
			c.allocLock.RUnlock()
			for _, ar := range allocs {
				ar.taskStatusLock.RLock()
				taskStates := copyTaskStates(ar.taskStates)
				ar.taskStatusLock.RUnlock()
				for taskName, taskState := range taskStates {
					if taskState.State == structs.TaskStateRunning {
						if tr, ok := ar.tasks[taskName]; ok {
							for _, service := range tr.task.Services {
								svcIdentifier := fmt.Sprintf("%s-%s", ar.alloc.ID, tr.task.Name)
								services[service.ID(svcIdentifier)] = struct{}{}
							}
						}
					}
				}
			}

			if err := c.consulService.KeepServices(services); err != nil {
				c.logger.Printf("[DEBUG] client: error removing services from non-running tasks: %v", err)
			}
		case <-c.shutdownCh:
			sync.Stop()
			c.logger.Printf("[INFO] client: shutting down consul sync")
			return
		}

	}
}
Ejemplo n.º 4
0
// PeriodicSync triggers periodic syncing of services and checks with Consul.
// This is a long lived go-routine which is stopped during shutdown
func (c *ConsulService) PeriodicSync() {
	sync := time.NewTicker(syncInterval)
	for {
		select {
		case <-sync.C:
			if err := c.performSync(); err != nil {
				if c.availble {
					c.logger.Printf("[DEBUG] consul: error in syncing task %q: %v", c.task.Name, err)
				}
				c.availble = false
			} else {
				c.availble = true
			}
		case <-c.shutdownCh:
			sync.Stop()
			c.logger.Printf("[INFO] consul: shutting down sync for task %q", c.task.Name)
			return
		}
	}
}