Exemplo n.º 1
0
func (r *RPCRegistry) Connect() {
	// We want the connection operation to block and constantly reconnect using grpc backoff
	log.Info("Starting gRPC connection to fleet-engine...")
	ep_engines := []string{":fleet-engine:"}
	r.balancer = newSimpleBalancer(ep_engines)
	connection, err := grpc.Dial(ep_engines[0],
		grpc.WithTimeout(12*time.Second), grpc.WithInsecure(),
		grpc.WithDialer(r.dialer), grpc.WithBlock(), grpc.WithBalancer(r.balancer))
	if err != nil {
		log.Fatalf("Unable to dial to registry: %s", err)
	}
	r.registryConn = connection
	r.registryClient = pb.NewRegistryClient(r.registryConn)
	log.Info("Connected succesfully to fleet-engine via grpc!")
}
Exemplo n.º 2
0
func (s *Server) Run() {
	log.Infof("Establishing etcd connectivity")

	var err error
	for sleep := time.Second; ; sleep = pkg.ExpBackoff(sleep, time.Minute) {
		_, err = s.hrt.Beat(s.mon.TTL)
		if err == nil {
			break
		}
		time.Sleep(sleep)
	}

	log.Infof("Starting server components")

	s.stop = make(chan bool)

	go s.Monitor()
	go s.api.Available(s.stop)
	go s.mach.PeriodicRefresh(machineStateRefreshInterval, s.stop)
	go s.agent.Heartbeat(s.stop)
	go s.aReconciler.Run(s.agent, s.stop)
	if s.disableEngine {
		log.Info("Not starting engine; disable-engine is set")
	} else {
		go s.engine.Run(s.engineReconcileInterval, s.stop)
	}

	beatchan := make(chan *unit.UnitStateHeartbeat)
	go s.usGen.Run(beatchan, s.stop)
	go s.usPub.Run(beatchan, s.stop)
}
Exemplo n.º 3
0
// IsGrpcLeader checks if the current leader has gRPC capabilities enabled or error
// if there is not a elected leader yet.
func (e *Engine) IsGrpcLeader() (bool, error) {
	leader, err := e.lManager.GetLease(engineLeaseName)
	if err != nil {
		log.Errorf("Unable to determine current lease: %v", err)
		return false, err
	}
	// It can happen that the leader is not yet stored in etcd and nor error (line 122 pkg/lease/etcd.go)
	if leader == nil {
		return false, errors.New("Unable to get the current leader")
	}

	leaderState, err := e.getMachineState(leader.MachineID())
	if err != nil {
		log.Errorf("Unable to determine current lease: %v", err)
		return false, err
	}

	if leaderState.Capabilities != nil && leaderState.Capabilities.Has(machine.CapGRPC) {
		return true, nil
	}

	log.Info("Engine leader has no gRPC capabilities enabled!")

	return false, nil
}
Exemplo n.º 4
0
func (s *Server) Run() {
	log.Infof("Establishing etcd connectivity")

	var err error
	for sleep := time.Second; ; sleep = pkg.ExpBackoff(sleep, time.Minute) {
		if s.restartServer {
			_, err = s.hrt.Beat(s.mon.TTL)
			if err == nil {
				log.Infof("hrt.Beat() success")
				break
			}
		} else {
			_, err = s.hrt.Register(s.mon.TTL)
			if err == nil {
				log.Infof("hrt.Register() success")
				break
			}
		}
		log.Warningf("Server register machine failed: %v, retrying in %d sec.", err, sleep)
		time.Sleep(sleep)
	}

	go s.Supervise()

	log.Infof("Starting server components")
	s.stopc = make(chan struct{})
	s.wg = sync.WaitGroup{}
	beatc := make(chan *unit.UnitStateHeartbeat)

	components := []func(){
		func() { s.api.Available(s.stopc) },
		func() { s.mach.PeriodicRefresh(machineStateRefreshInterval, s.stopc) },
		func() { s.agent.Heartbeat(s.stopc) },
		func() { s.aReconciler.Run(s.agent, s.stopc) },
		func() { s.usGen.Run(beatc, s.stopc) },
		func() { s.usPub.Run(beatc, s.stopc) },
	}
	if s.disableEngine {
		log.Info("Not starting engine; disable-engine is set")
	} else {
		components = append(components, func() { s.engine.Run(s.engineReconcileInterval, s.stopc) })
	}
	for _, f := range components {
		f := f
		s.wg.Add(1)
		go func() {
			f()
			s.wg.Done()
		}()
	}
}
Exemplo n.º 5
0
func NewRPCServer(reg registry.Registry, addr string) (*rpcserver, error) {
	s := &rpcserver{
		etcdRegistry:  reg,
		mu:            new(sync.Mutex),
		localRegistry: newInmemoryRegistry(),
		stop:          make(chan struct{}),
	}
	var err error
	tcpAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%d", addr, rpcServerPort))
	if err != nil {
		return nil, err
	}
	for it := 0; it < bindAddrMaxRetry; it++ {
		s.listener, err = net.ListenTCP("tcp", tcpAddr)
		if err == nil {
			break
		}
		log.Infof("Retrying %d to bind %s address... %v", it, tcpAddr, err)
		time.Sleep(bindRetryTimeout)
	}
	if err != nil {
		return nil, err
	}

	s.grpcserver = grpc.NewServer()
	s.localRegistry.LoadFrom(s.etcdRegistry)
	pb.RegisterRegistryServer(s.grpcserver, s)

	s.SetServingStatus(pb.HealthCheckResponse_NOT_SERVING)

	machineStates, err := s.etcdRegistry.Machines()
	if err != nil {
		return nil, err
	}
	s.hasNonGRPCAgents = false
	for _, state := range machineStates {
		if !state.Capabilities.Has(machine.CapGRPC) {
			log.Info("Fleet cluster has non gRPC agents!. Enabled unit state storage into etcd!")
			s.hasNonGRPCAgents = true
			break
		}
	}
	return s, nil
}