Revendor swarmkit to 2e956c4

Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>

vendor.conf

@@ -102,7 +102,7 @@ github.com/docker/containerd 03e5862ec0d8d3b3f750e19fca3ee367e13c090e
 github.com/tonistiigi/fifo 1405643975692217d6720f8b54aeee1bf2cd5cf4
 
 # cluster
-github.com/docker/swarmkit 9e4bd71a1690cd27400714fcd98c329b752b5c4c
+github.com/docker/swarmkit 2e956c40c02ad527c90ec85bdae25a0acac1bd87
 github.com/golang/mock bd3c8e81be01eef76d4b503f5e687d2d1354d2d9
 github.com/gogo/protobuf v0.3
 github.com/cloudflare/cfssl 7fb22c8cba7ecaf98e4082d22d65800cf45e042a

vendor/github.com/docker/swarmkit/agent/agent.go

@@ -37,6 +37,8 @@ type Agent struct {
 	started   chan struct{}
 	startOnce sync.Once // start only once
 	ready     chan struct{}
+	leaving   chan struct{}
+	leaveOnce sync.Once
 	stopped   chan struct{} // requests shutdown
 	stopOnce  sync.Once     // only allow stop to be called once
 	closed    chan struct{} // only closed in run
@@ -53,6 +55,7 @@ func New(config *Config) (*Agent, error) {
 		config:   config,
 		sessionq: make(chan sessionOperation),
 		started:  make(chan struct{}),
+		leaving:  make(chan struct{}),
 		stopped:  make(chan struct{}),
 		closed:   make(chan struct{}),
 		ready:    make(chan struct{}),
@@ -78,6 +81,37 @@ func (a *Agent) Start(ctx context.Context) error {
 	return err
 }
 
+// Leave instructs the agent to leave the cluster. This method will shutdown
+// assignment processing and remove all assignments from the node.
+// Leave blocks until worker has finished closing all task managers or agent
+// is closed.
+func (a *Agent) Leave(ctx context.Context) error {
+	select {
+	case <-a.started:
+	default:
+		return errAgentNotStarted
+	}
+
+	a.leaveOnce.Do(func() {
+		close(a.leaving)
+	})
+
+	// agent could be closed while Leave is in progress
+	var err error
+	ch := make(chan struct{})
+	go func() {
+		err = a.worker.Wait(ctx)
+		close(ch)
+	}()
+
+	select {
+	case <-ch:
+		return err
+	case <-a.closed:
+		return ErrClosed
+	}
+}
+
 // Stop shuts down the agent, blocking until full shutdown. If the agent is not
 // started, Stop will block until the agent has fully shutdown.
 func (a *Agent) Stop(ctx context.Context) error {
@@ -151,6 +185,7 @@ func (a *Agent) run(ctx context.Context) {
 		registered    = session.registered
 		ready         = a.ready // first session ready
 		sessionq      chan sessionOperation
+		leaving       = a.leaving
 		subscriptions = map[string]context.CancelFunc{}
 	)
 
@@ -171,7 +206,21 @@ func (a *Agent) run(ctx context.Context) {
 		select {
 		case operation := <-sessionq:
 			operation.response <- operation.fn(session)
+		case <-leaving:
+			leaving = nil
+
+			// TODO(stevvooe): Signal to the manager that the node is leaving.
+
+			// when leaving we remove all assignments.
+			if err := a.worker.Assign(ctx, nil); err != nil {
+				log.G(ctx).WithError(err).Error("failed removing all assignments")
+			}
 		case msg := <-session.assignments:
+			// if we have left, accept no more assignments
+			if leaving == nil {
+				continue
+			}
+
 			switch msg.Type {
 			case api.AssignmentsMessage_COMPLETE:
 				// Need to assign secrets before tasks, because tasks might depend on new secrets

vendor/github.com/docker/swarmkit/agent/reporter.go

@@ -115,7 +115,7 @@ func (sr *statusReporter) run(ctx context.Context) {
 			}
 
 			if err != nil {
-				log.G(ctx).WithError(err).Error("failed reporting status to agent")
+				log.G(ctx).WithError(err).Error("status reporter failed to report status to agent")
 
 				// place it back in the map, if not there, allowing us to pick
 				// the value if a new one came in when we were sending the last

vendor/github.com/docker/swarmkit/agent/task.go

@@ -1,6 +1,7 @@
 package agent
 
 import (
+	"sync"
 	"time"
 
 	"github.com/docker/swarmkit/agent/exec"
@@ -19,8 +20,10 @@ type taskManager struct {
 
 	updateq chan *api.Task
 
-	shutdown chan struct{}
-	closed   chan struct{}
+	shutdown     chan struct{}
+	shutdownOnce sync.Once
+	closed       chan struct{}
+	closeOnce    sync.Once
 }
 
 func newTaskManager(ctx context.Context, task *api.Task, ctlr exec.Controller, reporter StatusReporter) *taskManager {
@@ -48,20 +51,15 @@ func (tm *taskManager) Update(ctx context.Context, task *api.Task) error {
 	}
 }
 
-// Close shuts down the task manager, blocking until it is stopped.
+// Close shuts down the task manager, blocking until it is closed.
 func (tm *taskManager) Close() error {
-	select {
-	case <-tm.closed:
-		return nil
-	case <-tm.shutdown:
-	default:
+	tm.shutdownOnce.Do(func() {
 		close(tm.shutdown)
-	}
+	})
 
-	select {
-	case <-tm.closed:
-		return nil
-	}
+	<-tm.closed
+
+	return nil
 }
 
 func (tm *taskManager) Logs(ctx context.Context, options api.LogSubscriptionOptions, publisher exec.LogPublisher) {
@@ -106,7 +104,8 @@ func (tm *taskManager) run(ctx context.Context) {
 			// always check for shutdown before running.
 			select {
 			case <-tm.shutdown:
-				continue // ignore run request and handle shutdown
+				shutdown = tm.shutdown // a little questionable
+				continue               // ignore run request and handle shutdown
 			case <-tm.closed:
 				continue
 			default:
@@ -143,7 +142,7 @@ func (tm *taskManager) run(ctx context.Context) {
 					}
 
 					if err := tm.reporter.UpdateTaskStatus(ctx, running.ID, status); err != nil {
-						log.G(ctx).WithError(err).Error("failed reporting status to agent")
+						log.G(ctx).WithError(err).Error("task manager failed to report status to agent")
 					}
 				}
 
@@ -230,25 +229,19 @@ func (tm *taskManager) run(ctx context.Context) {
 				continue       // wait until operation actually exits.
 			}
 
-			// TODO(stevvooe): This should be left for the repear.
-
-			// make an attempt at removing. this is best effort. any errors will be
-			// retried by the reaper later.
-			if err := tm.ctlr.Remove(ctx); err != nil {
-				log.G(ctx).WithError(err).WithField("task.id", tm.task.ID).Error("remove task failed")
-			}
-
-			if err := tm.ctlr.Close(); err != nil {
-				log.G(ctx).WithError(err).Error("error closing controller")
-			}
 			// disable everything, and prepare for closing.
 			statusq = nil
 			errs = nil
 			shutdown = nil
-			close(tm.closed)
+			tm.closeOnce.Do(func() {
+				close(tm.closed)
+			})
 		case <-tm.closed:
 			return
 		case <-ctx.Done():
+			tm.closeOnce.Do(func() {
+				close(tm.closed)
+			})
 			return
 		}
 	}

vendor/github.com/docker/swarmkit/agent/worker.go

@@ -40,6 +40,9 @@ type Worker interface {
 
 	// Subscribe to log messages matching the subscription.
 	Subscribe(ctx context.Context, subscription *api.SubscriptionMessage) error
+
+	// Wait blocks until all task managers have closed
+	Wait(ctx context.Context) error
 }
 
 // statusReporterKey protects removal map from panic.
@@ -57,6 +60,9 @@ type worker struct {
 
 	taskManagers map[string]*taskManager
 	mu           sync.RWMutex
+
+	closed  bool
+	closers sync.WaitGroup // keeps track of active closers
 }
 
 func newWorker(db *bolt.DB, executor exec.Executor, publisherProvider exec.LogPublisherProvider) *worker {
@@ -106,6 +112,10 @@ func (w *worker) Init(ctx context.Context) error {
 
 // Close performs worker cleanup when no longer needed.
 func (w *worker) Close() {
+	w.mu.Lock()
+	w.closed = true
+	w.mu.Unlock()
+
 	w.taskevents.Close()
 }
 
@@ -118,6 +128,10 @@ func (w *worker) Assign(ctx context.Context, assignments []*api.AssignmentChange
 	w.mu.Lock()
 	defer w.mu.Unlock()
 
+	if w.closed {
+		return ErrClosed
+	}
+
 	log.G(ctx).WithFields(logrus.Fields{
 		"len(assignments)": len(assignments),
 	}).Debug("(*worker).Assign")
@@ -140,6 +154,10 @@ func (w *worker) Update(ctx context.Context, assignments []*api.AssignmentChange
 	w.mu.Lock()
 	defer w.mu.Unlock()
 
+	if w.closed {
+		return ErrClosed
+	}
+
 	log.G(ctx).WithFields(logrus.Fields{
 		"len(assignments)": len(assignments),
 	}).Debug("(*worker).Update")
@@ -222,10 +240,22 @@ func reconcileTaskState(ctx context.Context, w *worker, assignments []*api.Assig
 	}
 
 	closeManager := func(tm *taskManager) {
-		// when a task is no longer assigned, we shutdown the task manager for
-		// it and leave cleanup to the sweeper.
-		if err := tm.Close(); err != nil {
-			log.G(ctx).WithError(err).Error("error closing task manager")
+		go func(tm *taskManager) {
+			defer w.closers.Done()
+			// when a task is no longer assigned, we shutdown the task manager
+			if err := tm.Close(); err != nil {
+				log.G(ctx).WithError(err).Error("error closing task manager")
+			}
+		}(tm)
+
+		// make an attempt at removing. this is best effort. any errors will be
+		// retried by the reaper later.
+		if err := tm.ctlr.Remove(ctx); err != nil {
+			log.G(ctx).WithError(err).WithField("task.id", tm.task.ID).Error("remove task failed")
+		}
+
+		if err := tm.ctlr.Close(); err != nil {
+			log.G(ctx).WithError(err).Error("error closing controller")
 		}
 	}
 
@@ -359,6 +389,8 @@ func (w *worker) taskManager(ctx context.Context, tx *bolt.Tx, task *api.Task) (
 		return nil, err
 	}
 	w.taskManagers[task.ID] = tm
+	// keep track of active tasks
+	w.closers.Add(1)
 	return tm, nil
 }
 
@@ -484,3 +516,18 @@ func (w *worker) Subscribe(ctx context.Context, subscription *api.SubscriptionMe
 		}
 	}
 }
+
+func (w *worker) Wait(ctx context.Context) error {
+	ch := make(chan struct{})
+	go func() {
+		w.closers.Wait()
+		close(ch)
+	}()
+
+	select {
+	case <-ch:
+		return nil
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}

vendor/github.com/docker/swarmkit/ca/certificates.go

@@ -69,7 +69,7 @@ const (
 	MinNodeCertExpiration = 1 * time.Hour
 )
 
-// A recoverableErr is an non-fatal error encountered signing a certificate,
+// A recoverableErr is a non-fatal error encountered signing a certificate,
 // which means that the certificate issuance may be retried at a later time.
 type recoverableErr struct {
 	err error

vendor/github.com/docker/swarmkit/ca/config.go

@@ -459,13 +459,26 @@ func RenewTLSConfig(ctx context.Context, s *SecurityConfig, remotes remotes.Remo
 			if err != nil {
 				// We failed to read the expiration, let's stick with the starting default
 				log.Errorf("failed to read the expiration of the TLS certificate in: %s", s.KeyReader().Target())
-				updates <- CertificateUpdate{Err: errors.New("failed to read certificate expiration")}
+
+				select {
+				case updates <- CertificateUpdate{Err: errors.New("failed to read certificate expiration")}:
+				case <-ctx.Done():
+					log.Info("shutting down certificate renewal routine")
+					return
+				}
 			} else {
 				// If we have an expired certificate, we let's stick with the starting default in
 				// the hope that this is a temporary clock skew.
 				if validUntil.Before(time.Now()) {
 					log.WithError(err).Errorf("failed to create a new client TLS config")
-					updates <- CertificateUpdate{Err: errors.New("TLS certificate is expired")}
+
+					select {
+					case updates <- CertificateUpdate{Err: errors.New("TLS certificate is expired")}:
+					case <-ctx.Done():
+						log.Info("shutting down certificate renewal routine")
+						return
+					}
+
 				} else {
 					// Random retry time between 50% and 80% of the total time to expiration
 					retry = calculateRandomExpiry(validFrom, validUntil)
@@ -478,19 +491,27 @@ func RenewTLSConfig(ctx context.Context, s *SecurityConfig, remotes remotes.Remo
 
 			select {
 			case <-time.After(retry):
-				log.Infof("renewing certificate")
+				log.Info("renewing certificate")
 			case <-renew:
-				log.Infof("forced certificate renewal")
+				log.Info("forced certificate renewal")
 			case <-ctx.Done():
-				log.Infof("shuting down certificate renewal routine")
+				log.Info("shutting down certificate renewal routine")
 				return
 			}
 
-			// ignore errors - it will just try again laster
+			// ignore errors - it will just try again later
+			var certUpdate CertificateUpdate
 			if err := RenewTLSConfigNow(ctx, s, remotes); err != nil {
-				updates <- CertificateUpdate{Err: err}
+				certUpdate.Err = err
 			} else {
-				updates <- CertificateUpdate{Role: s.ClientTLSCreds.Role()}
+				certUpdate.Role = s.ClientTLSCreds.Role()
+			}
+
+			select {
+			case updates <- certUpdate:
+			case <-ctx.Done():
+				log.Info("shutting down certificate renewal routine")
+				return
 			}
 		}
 	}()

vendor/github.com/docker/swarmkit/log/context.go

@@ -42,7 +42,7 @@ func GetLogger(ctx context.Context) *logrus.Entry {
 }
 
 // WithModule adds the module to the context, appending it with a slash if a
-// module already exists. A module is just an roughly correlated defined by the
+// module already exists. A module is just a roughly correlated defined by the
 // call tree for a given context.
 //
 // As an example, we might have a "node" module already part of a context. If

vendor/github.com/docker/swarmkit/manager/allocator/networkallocator/portallocator.go

@@ -73,7 +73,7 @@ func newPortSpace(protocol api.PortConfig_Protocol) (*portSpace, error) {
 	}, nil
 }
 
-// getPortConfigkey returns a map key for doing set operations with
+// getPortConfigKey returns a map key for doing set operations with
 // ports. The key consists of name, protocol and target port which
 // uniquely identifies a port within a single Endpoint.
 func getPortConfigKey(p *api.PortConfig) api.PortConfig {

vendor/github.com/docker/swarmkit/manager/logbroker/broker.go

@@ -173,7 +173,7 @@ func (lb *LogBroker) watchSubscriptions(nodeID string) ([]*subscription, chan ev
 	}))
 
 	// Grab current subscriptions.
-	subscriptions := make([]*subscription, 0, len(lb.registeredSubscriptions))
+	var subscriptions []*subscription
 	for _, s := range lb.registeredSubscriptions {
 		if s.Contains(nodeID) {
 			subscriptions = append(subscriptions, s)

vendor/github.com/docker/swarmkit/manager/manager.go

@@ -45,7 +45,7 @@ const (
 	defaultTaskHistoryRetentionLimit = 5
 )
 
-// RemoteAddrs provides an listening address and an optional advertise address
+// RemoteAddrs provides a listening address and an optional advertise address
 // for serving the remote API.
 type RemoteAddrs struct {
 	// Address to bind

vendor/github.com/docker/swarmkit/manager/orchestrator/replicated/replicated.go

@@ -102,7 +102,7 @@ func (r *Orchestrator) Stop() {
 
 func (r *Orchestrator) tick(ctx context.Context) {
 	// tickTasks must be called first, so we respond to task-level changes
-	// before performing service reconcillation.
+	// before performing service reconciliation.
 	r.tickTasks(ctx)
 	r.tickServices(ctx)
 }

vendor/github.com/docker/swarmkit/manager/orchestrator/replicated/services.go

@@ -181,7 +181,7 @@ func (r *Orchestrator) reconcile(ctx context.Context, service *api.Service) {
 func (r *Orchestrator) addTasks(ctx context.Context, batch *store.Batch, service *api.Service, runningSlots map[uint64]orchestrator.Slot, deadSlots map[uint64]orchestrator.Slot, count int) {
 	slot := uint64(0)
 	for i := 0; i < count; i++ {
-		// Find an slot number that is missing a running task
+		// Find a slot number that is missing a running task
 		for {
 			slot++
 			if _, ok := runningSlots[slot]; !ok {

vendor/github.com/docker/swarmkit/manager/orchestrator/replicated/tasks.go

@@ -15,7 +15,7 @@ import (
 
 // This file provides task-level orchestration. It observes changes to task
 // and node state and kills/recreates tasks if necessary. This is distinct from
-// service-level reconcillation, which observes changes to services and creates
+// service-level reconciliation, which observes changes to services and creates
 // and/or kills tasks to match the service definition.
 
 func invalidNode(n *api.Node) bool {

vendor/github.com/docker/swarmkit/manager/state/raft/raft.go

@@ -380,8 +380,8 @@ func (n *Node) Run(ctx context.Context) error {
 		cancel()
 		n.stop(ctx)
 		if nodeRemoved {
-			// Move WAL and snapshot out of the way, since
-			// they are no longer usable.
+			// Delete WAL and snapshots, since they are no longer
+			// usable.
 			if err := n.raftLogger.Clear(ctx); err != nil {
 				log.G(ctx).WithError(err).Error("failed to move wal after node removal")
 			}
@@ -405,7 +405,7 @@ func (n *Node) Run(ctx context.Context) error {
 
 			// Save entries to storage
 			if err := n.saveToStorage(ctx, &raftConfig, rd.HardState, rd.Entries, rd.Snapshot); err != nil {
-				log.G(ctx).WithError(err).Error("failed to save entries to storage")
+				return errors.Wrap(err, "failed to save entries to storage")
 			}
 
 			if len(rd.Messages) != 0 {
@@ -710,11 +710,20 @@ func (n *Node) Join(ctx context.Context, req *api.JoinRequest) (*api.JoinRespons
 	defer n.membershipLock.Unlock()
 
 	if !n.IsMember() {
-		return nil, ErrNoRaftMember
+		return nil, grpc.Errorf(codes.FailedPrecondition, "%s", ErrNoRaftMember.Error())
 	}
 
 	if !n.isLeader() {
-		return nil, ErrLostLeadership
+		return nil, grpc.Errorf(codes.FailedPrecondition, "%s", ErrLostLeadership.Error())
+	}
+
+	// A single manager must not be able to join the raft cluster twice. If
+	// it did, that would cause the quorum to be computed incorrectly. This
+	// could happen if the WAL was deleted from an active manager.
+	for _, m := range n.cluster.Members() {
+		if m.NodeID == nodeInfo.NodeID {
+			return nil, grpc.Errorf(codes.AlreadyExists, "%s", "a raft member with this node ID already exists")
+		}
 	}
 
 	// Find a unique ID for the joining member.
@@ -734,7 +743,7 @@ func (n *Node) Join(ctx context.Context, req *api.JoinRequest) (*api.JoinRespons
 
 	requestHost, requestPort, err := net.SplitHostPort(remoteAddr)
 	if err != nil {
-		return nil, fmt.Errorf("invalid address %s in raft join request", remoteAddr)
+		return nil, grpc.Errorf(codes.InvalidArgument, "invalid address %s in raft join request", remoteAddr)
 	}
 
 	requestIP := net.ParseIP(requestHost)
@@ -990,6 +999,11 @@ func (n *Node) ProcessRaftMessage(ctx context.Context, msg *api.ProcessRaftMessa
 	defer n.stopMu.RUnlock()
 
 	if n.IsMember() {
+		if msg.Message.To != n.Config.ID {
+			n.processRaftMessageLogger(ctx, msg).Errorf("received message intended for raft_id %x", msg.Message.To)
+			return &api.ProcessRaftMessageResponse{}, nil
+		}
+
 		if err := n.raftNode.Step(ctx, *msg.Message); err != nil {
 			n.processRaftMessageLogger(ctx, msg).WithError(err).Debug("raft Step failed")
 		}

vendor/github.com/docker/swarmkit/node/node.go

@@ -295,7 +295,7 @@ func (n *Node) run(ctx context.Context) (err error) {
 	var wg sync.WaitGroup
 	wg.Add(2)
 	go func() {
-		managerErr = n.runManager(ctx, securityConfig, managerReady) // store err and loop
+		managerErr = n.superviseManager(ctx, securityConfig, managerReady) // store err and loop
 		wg.Done()
 		cancel()
 	}()
@@ -330,6 +330,14 @@ func (n *Node) Stop(ctx context.Context) error {
 	default:
 		return errNodeNotStarted
 	}
+	// ask agent to clean up assignments
+	n.Lock()
+	if n.agent != nil {
+		if err := n.agent.Leave(ctx); err != nil {
+			log.G(ctx).WithError(err).Error("agent failed to clean up assignments")
+		}
+	}
+	n.Unlock()
 
 	n.stopOnce.Do(func() {
 		close(n.stopped)
@@ -616,9 +624,7 @@ func (n *Node) waitRole(ctx context.Context, role string) error {
 		n.roleCond.Wait()
 		select {
 		case <-ctx.Done():
-			if ctx.Err() != nil {
-				return ctx.Err()
-			}
+			return ctx.Err()
 		default:
 		}
 	}
@@ -627,100 +633,117 @@ func (n *Node) waitRole(ctx context.Context, role string) error {
 }
 
 func (n *Node) runManager(ctx context.Context, securityConfig *ca.SecurityConfig, ready chan struct{}) error {
+	remoteAddr, _ := n.remotes.Select(n.NodeID())
+	m, err := manager.New(&manager.Config{
+		ForceNewCluster: n.config.ForceNewCluster,
+		RemoteAPI: manager.RemoteAddrs{
+			ListenAddr:    n.config.ListenRemoteAPI,
+			AdvertiseAddr: n.config.AdvertiseRemoteAPI,
+		},
+		ControlAPI:       n.config.ListenControlAPI,
+		SecurityConfig:   securityConfig,
+		ExternalCAs:      n.config.ExternalCAs,
+		JoinRaft:         remoteAddr.Addr,
+		StateDir:         n.config.StateDir,
+		HeartbeatTick:    n.config.HeartbeatTick,
+		ElectionTick:     n.config.ElectionTick,
+		AutoLockManagers: n.config.AutoLockManagers,
+		UnlockKey:        n.unlockKey,
+		Availability:     n.config.Availability,
+	})
+	if err != nil {
+		return err
+	}
+	done := make(chan struct{})
+	var runErr error
+	go func() {
+		if err := m.Run(context.Background()); err != nil && err != raft.ErrMemberRemoved {
+			runErr = err
+		}
+		close(done)
+	}()
+
+	workerRole := make(chan struct{})
+	waitRoleCtx, waitRoleCancel := context.WithCancel(ctx)
+	defer waitRoleCancel()
+	go func() {
+		n.waitRole(waitRoleCtx, ca.WorkerRole)
+		close(workerRole)
+	}()
+
+	defer func() {
+		n.Lock()
+		n.manager = nil
+		n.Unlock()
+		m.Stop(ctx)
+		<-done
+		n.setControlSocket(nil)
+	}()
+
+	n.Lock()
+	n.manager = m
+	n.Unlock()
+
+	connCtx, connCancel := context.WithCancel(ctx)
+	defer connCancel()
+
+	go n.initManagerConnection(connCtx, ready)
+
+	// this happens only on initial start
+	if ready != nil {
+		go func(ready chan struct{}) {
+			select {
+			case <-ready:
+				addr, err := n.RemoteAPIAddr()
+				if err != nil {
+					log.G(ctx).WithError(err).Errorf("get remote api addr")
+				} else {
+					n.remotes.Observe(api.Peer{NodeID: n.NodeID(), Addr: addr}, remotes.DefaultObservationWeight)
+				}
+			case <-connCtx.Done():
+			}
+		}(ready)
+	}
+
+	// wait for manager stop or for role change
+	// if manager stopped before role change, wait for new role for 16 seconds,
+	// then just restart manager, we might just miss that event.
+	// we need to wait for role to prevent manager to start again with wrong
+	// certificate
+	select {
+	case <-done:
+		timer := time.NewTimer(16 * time.Second)
+		defer timer.Stop()
+		select {
+		case <-timer.C:
+			log.G(ctx).Warn("failed to get worker role after manager stop, restart manager")
+		case <-workerRole:
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+		return runErr
+	case <-workerRole:
+		log.G(ctx).Info("role changed to worker, wait for manager to stop")
+		select {
+		case <-done:
+			return runErr
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	case <-ctx.Done():
+		return ctx.Err()
+	}
+}
+
+func (n *Node) superviseManager(ctx context.Context, securityConfig *ca.SecurityConfig, ready chan struct{}) error {
 	for {
 		if err := n.waitRole(ctx, ca.ManagerRole); err != nil {
 			return err
 		}
-
-		remoteAddr, _ := n.remotes.Select(n.NodeID())
-		m, err := manager.New(&manager.Config{
-			ForceNewCluster: n.config.ForceNewCluster,
-			RemoteAPI: manager.RemoteAddrs{
-				ListenAddr:    n.config.ListenRemoteAPI,
-				AdvertiseAddr: n.config.AdvertiseRemoteAPI,
-			},
-			ControlAPI:       n.config.ListenControlAPI,
-			SecurityConfig:   securityConfig,
-			ExternalCAs:      n.config.ExternalCAs,
-			JoinRaft:         remoteAddr.Addr,
-			StateDir:         n.config.StateDir,
-			HeartbeatTick:    n.config.HeartbeatTick,
-			ElectionTick:     n.config.ElectionTick,
-			AutoLockManagers: n.config.AutoLockManagers,
-			UnlockKey:        n.unlockKey,
-			Availability:     n.config.Availability,
-		})
-		if err != nil {
-			return err
-		}
-		done := make(chan struct{})
-		var runErr error
-		go func() {
-			runErr = m.Run(context.Background())
-			close(done)
-		}()
-
-		n.Lock()
-		n.manager = m
-		n.Unlock()
-
-		connCtx, connCancel := context.WithCancel(ctx)
-		go n.initManagerConnection(connCtx, ready)
-
-		// this happens only on initial start
-		if ready != nil {
-			go func(ready chan struct{}) {
-				select {
-				case <-ready:
-					addr, err := n.RemoteAPIAddr()
-					if err != nil {
-						log.G(ctx).WithError(err).Errorf("get remote api addr")
-					} else {
-						n.remotes.Observe(api.Peer{NodeID: n.NodeID(), Addr: addr}, remotes.DefaultObservationWeight)
-					}
-				case <-connCtx.Done():
-				}
-			}(ready)
-			ready = nil
-		}
-
-		roleChanged := make(chan error)
-		waitCtx, waitCancel := context.WithCancel(ctx)
-		go func() {
-			err := n.waitRole(waitCtx, ca.WorkerRole)
-			roleChanged <- err
-		}()
-
-		select {
-		case <-done:
-			// Fail out if m.Run() returns error, otherwise wait for
-			// role change.
-			if runErr != nil && runErr != raft.ErrMemberRemoved {
-				err = runErr
-			} else {
-				err = <-roleChanged
-			}
-		case err = <-roleChanged:
-		}
-
-		n.Lock()
-		n.manager = nil
-		n.Unlock()
-
-		select {
-		case <-done:
-		case <-ctx.Done():
-			err = ctx.Err()
-			m.Stop(context.Background())
-			<-done
-		}
-		connCancel()
-		n.setControlSocket(nil)
-		waitCancel()
-
-		if err != nil {
-			return err
+		if err := n.runManager(ctx, securityConfig, ready); err != nil {
+			return errors.Wrap(err, "manager stopped")
 		}
+		ready = nil
 	}
 }