func (rm *roleManager) reconcileRole(node *api.Node) {
if node.Role == node.Spec.DesiredRole {
// Nothing to do.
delete(rm.pending, node.ID)
return
}
// Promotion can proceed right away.
if node.Spec.DesiredRole == api.NodeRoleManager && node.Role == api.NodeRoleWorker {
err := rm.store.Update(func(tx store.Tx) error {
updatedNode := store.GetNode(tx, node.ID)
if updatedNode == nil || updatedNode.Spec.DesiredRole != node.Spec.DesiredRole || updatedNode.Role != node.Role {
return nil
}
updatedNode.Role = api.NodeRoleManager
return store.UpdateNode(tx, updatedNode)
})
if err != nil {
log.L.WithError(err).Errorf("failed to promote node %s", node.ID)
} else {
delete(rm.pending, node.ID)
}
} else if node.Spec.DesiredRole == api.NodeRoleWorker && node.Role == api.NodeRoleManager {
// Check for node in memberlist
member := rm.raft.GetMemberByNodeID(node.ID)
if member != nil {
// Quorum safeguard
if !rm.raft.CanRemoveMember(member.RaftID) {
// TODO(aaronl): Retry later
log.L.Debugf("can't demote node %s at this time: removing member from raft would result in a loss of quorum", node.ID)
return
}
rmCtx, rmCancel := context.WithTimeout(rm.ctx, 5*time.Second)
defer rmCancel()
if err := rm.raft.RemoveMember(rmCtx, member.RaftID); err != nil {
// TODO(aaronl): Retry later
log.L.WithError(err).Debugf("can't demote node %s at this time", node.ID)
return
}
}
err := rm.store.Update(func(tx store.Tx) error {
updatedNode := store.GetNode(tx, node.ID)
if updatedNode == nil || updatedNode.Spec.DesiredRole != node.Spec.DesiredRole || updatedNode.Role != node.Role {
return nil
}
updatedNode.Role = api.NodeRoleWorker
return store.UpdateNode(tx, updatedNode)
})
if err != nil {
log.L.WithError(err).Errorf("failed to demote node %s", node.ID)
} else {
delete(rm.pending, node.ID)
}
}
}
// CheckValuesOnNodes checks that all the nodes in the cluster have the same
// replicated data, generally used to check if a node can catch up with the logs
// correctly
func CheckValuesOnNodes(t *testing.T, clockSource *fakeclock.FakeClock, checkNodes map[uint64]*TestNode, ids []string, values []*api.Node) {
iteration := 0
for checkNodeID, node := range checkNodes {
assert.NoError(t, PollFunc(clockSource, func() error {
var err error
node.MemoryStore().View(func(tx store.ReadTx) {
var allNodes []*api.Node
allNodes, err = store.FindNodes(tx, store.All)
if err != nil {
return
}
for i, id := range ids {
n := store.GetNode(tx, id)
if n == nil {
err = fmt.Errorf("node %s not found on %d (iteration %d)", id, checkNodeID, iteration)
return
}
if !reflect.DeepEqual(values[i], n) {
err = fmt.Errorf("node %s did not match expected value on %d (iteration %d)", id, checkNodeID, iteration)
return
}
}
if len(allNodes) != len(ids) {
err = fmt.Errorf("expected %d nodes, got %d (iteration %d)", len(ids), len(allNodes), iteration)
return
}
})
return err
}))
iteration++
}
}
// RemoveNode removes a Node referenced by NodeID with the given NodeSpec.
// - Returns NotFound if the Node is not found.
// - Returns FailedPrecondition if the Node has manager role (and is part of the memberlist) or is not shut down.
// - Returns InvalidArgument if NodeID or NodeVersion is not valid.
// - Returns an error if the delete fails.
func (s *Server) RemoveNode(ctx context.Context, request *api.RemoveNodeRequest) (*api.RemoveNodeResponse, error) {
if request.NodeID == "" {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
err := s.store.Update(func(tx store.Tx) error {
node := store.GetNode(tx, request.NodeID)
if node == nil {
return grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
if node.Spec.Role == api.NodeRoleManager {
if s.raft == nil {
return grpc.Errorf(codes.FailedPrecondition, "node %s is a manager but cannot access node information from the raft memberlist", request.NodeID)
}
if member := s.raft.GetMemberByNodeID(request.NodeID); member != nil {
return grpc.Errorf(codes.FailedPrecondition, "node %s is a cluster manager and is a member of the raft cluster. It must be demoted to worker before removal", request.NodeID)
}
}
if !request.Force && node.Status.State == api.NodeStatus_READY {
return grpc.Errorf(codes.FailedPrecondition, "node %s is not down and can't be removed", request.NodeID)
}
return store.DeleteNode(tx, request.NodeID)
})
if err != nil {
return nil, err
}
return &api.RemoveNodeResponse{}, nil
}
// GetNode returns a Node given a NodeID.
// - Returns `InvalidArgument` if NodeID is not provided.
// - Returns `NotFound` if the Node is not found.
func (s *Server) GetNode(ctx context.Context, request *api.GetNodeRequest) (*api.GetNodeResponse, error) {
if request.NodeID == "" {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
var node *api.Node
s.store.View(func(tx store.ReadTx) {
node = store.GetNode(tx, request.NodeID)
})
if node == nil {
return nil, grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
if s.raft != nil {
memberlist := s.raft.GetMemberlist()
for _, member := range memberlist {
if member.NodeID == node.ID {
node.ManagerStatus = &api.ManagerStatus{
RaftID: member.RaftID,
Addr: member.Addr,
Leader: member.Status.Leader,
Reachability: member.Status.Reachability,
}
break
}
}
}
return &api.GetNodeResponse{
Node: node,
}, nil
}
func TestRenewTLSConfigWithNoNode(t *testing.T) {
t.Parallel()
tc := testutils.NewTestCA(t)
defer tc.Stop()
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// Get a new nodeConfig with a TLS cert that has the default Cert duration
nodeConfig, err := tc.WriteNewNodeConfig(ca.ManagerRole)
assert.NoError(t, err)
// Create a new RootCA, and change the policy to issue 6 minute certificates.
// Because of the default backdate of 5 minutes, this issues certificates
// valid for 1 minute.
newRootCA, err := ca.NewRootCA(tc.RootCA.Cert, tc.RootCA.Key, ca.DefaultNodeCertExpiration)
assert.NoError(t, err)
newRootCA.Signer.SetPolicy(&cfconfig.Signing{
Default: &cfconfig.SigningProfile{
Usage: []string{"signing", "key encipherment", "server auth", "client auth"},
Expiry: 6 * time.Minute,
},
})
// Create a new CSR and overwrite the key on disk
csr, key, err := ca.GenerateNewCSR()
assert.NoError(t, err)
// Issue a new certificate with the same details as the current config, but with 1 min expiration time
c := nodeConfig.ClientTLSCreds
signedCert, err := newRootCA.ParseValidateAndSignCSR(csr, c.NodeID(), c.Role(), c.Organization())
assert.NoError(t, err)
assert.NotNil(t, signedCert)
// Overwrite the certificate on disk with one that expires in 1 minute
err = ioutils.AtomicWriteFile(tc.Paths.Node.Cert, signedCert, 0644)
assert.NoError(t, err)
err = ioutils.AtomicWriteFile(tc.Paths.Node.Key, key, 0600)
assert.NoError(t, err)
// Delete the node from the backend store
err = tc.MemoryStore.Update(func(tx store.Tx) error {
node := store.GetNode(tx, nodeConfig.ClientTLSCreds.NodeID())
assert.NotNil(t, node)
return store.DeleteNode(tx, nodeConfig.ClientTLSCreds.NodeID())
})
assert.NoError(t, err)
renew := make(chan struct{})
updates := ca.RenewTLSConfig(ctx, nodeConfig, tc.Remotes, renew)
select {
case <-time.After(10 * time.Second):
assert.Fail(t, "TestRenewTLSConfig timed-out")
case certUpdate := <-updates:
assert.Error(t, certUpdate.Err)
assert.Contains(t, certUpdate.Err.Error(), "not found when attempting to renew certificate")
}
}
// RemoveNode updates a Node referenced by NodeID with the given NodeSpec.
// - Returns NotFound if the Node is not found.
// - Returns FailedPrecondition if the Node has manager role or not shut down.
// - Returns InvalidArgument if NodeID or NodeVersion is not valid.
// - Returns an error if the delete fails.
func (s *Server) RemoveNode(ctx context.Context, request *api.RemoveNodeRequest) (*api.RemoveNodeResponse, error) {
if request.NodeID == "" {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
if s.raft != nil {
memberlist := s.raft.GetMemberlist()
for _, member := range memberlist {
if member.NodeID == request.NodeID {
return nil, grpc.Errorf(codes.FailedPrecondition, "node %s is a cluster manager and is part of the quorum. It must be demoted to worker before removal", request.NodeID)
}
}
}
err := s.store.Update(func(tx store.Tx) error {
node := store.GetNode(tx, request.NodeID)
if node == nil {
return grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
if node.Spec.Role == api.NodeRoleManager {
return grpc.Errorf(codes.FailedPrecondition, "node %s role is set to manager. It should be demoted to worker for safe removal", request.NodeID)
}
if node.Status.State == api.NodeStatus_READY {
return grpc.Errorf(codes.FailedPrecondition, "node %s is not down and can't be removed", request.NodeID)
}
return store.DeleteNode(tx, request.NodeID)
})
if err != nil {
return nil, err
}
return &api.RemoveNodeResponse{}, nil
}
func (r *Orchestrator) handleTaskChange(ctx context.Context, t *api.Task) {
// If we already set the desired state past TaskStateRunning, there is no
// further action necessary.
if t.DesiredState > api.TaskStateRunning {
return
}
var (
n *api.Node
service *api.Service
)
r.store.View(func(tx store.ReadTx) {
if t.NodeID != "" {
n = store.GetNode(tx, t.NodeID)
}
if t.ServiceID != "" {
service = store.GetService(tx, t.ServiceID)
}
})
if !orchestrator.IsReplicatedService(service) {
return
}
if t.Status.State > api.TaskStateRunning ||
(t.NodeID != "" && invalidNode(n)) {
r.restartTasks[t.ID] = struct{}{}
}
}
// GetNode returns a Node given a NodeID.
// - Returns `InvalidArgument` if NodeID is not provided.
// - Returns `NotFound` if the Node is not found.
func (s *Server) GetNode(ctx context.Context, request *api.GetNodeRequest) (*api.GetNodeResponse, error) {
if request.NodeID == "" {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
var node *api.Node
s.store.View(func(tx store.ReadTx) {
node = store.GetNode(tx, request.NodeID)
})
if node == nil {
return nil, grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
if s.raft != nil {
memberlist := s.raft.GetMemberlist()
raftID, err := identity.ParseNodeID(request.NodeID)
if err == nil && memberlist[raftID] != nil {
node.ManagerStatus = &api.ManagerStatus{Raft: *memberlist[raftID]}
}
}
return &api.GetNodeResponse{
Node: node,
}, nil
}
func (a *Allocator) allocateNode(ctx context.Context, nc *networkContext, node *api.Node) error {
if err := nc.nwkAllocator.AllocateNode(node); err != nil {
return err
}
if err := a.store.Update(func(tx store.Tx) error {
for {
err := store.UpdateNode(tx, node)
if err != nil && err != store.ErrSequenceConflict {
return fmt.Errorf("failed updating state in store transaction for node %s: %v", node.ID, err)
}
if err == store.ErrSequenceConflict {
storeNode := store.GetNode(tx, node.ID)
storeNode.Attachment = node.Attachment.Copy()
node = storeNode
continue
}
break
}
return nil
}); err != nil {
if err := nc.nwkAllocator.DeallocateNode(node); err != nil {
log.G(ctx).WithError(err).Errorf("failed rolling back allocation of node %s: %v", node.ID, err)
}
return err
}
return nil
}
func testRaftRestartCluster(t *testing.T, stagger bool) {
nodes, clockSource := raftutils.NewRaftCluster(t, tc)
defer raftutils.TeardownCluster(t, nodes)
// Propose a value
values := make([]*api.Node, 2)
var err error
values[0], err = raftutils.ProposeValue(t, nodes[1], "id1")
assert.NoError(t, err, "failed to propose value")
// Stop all nodes
for _, node := range nodes {
node.Server.Stop()
node.Shutdown()
}
raftutils.AdvanceTicks(clockSource, 5)
// Restart all nodes
i := 0
for k, node := range nodes {
if stagger && i != 0 {
raftutils.AdvanceTicks(clockSource, 1)
}
nodes[k] = raftutils.RestartNode(t, clockSource, node, false)
i++
}
raftutils.WaitForCluster(t, clockSource, nodes)
// Propose another value
values[1], err = raftutils.ProposeValue(t, raftutils.Leader(nodes), "id2")
assert.NoError(t, err, "failed to propose value")
for _, node := range nodes {
assert.NoError(t, raftutils.PollFunc(clockSource, func() error {
var err error
node.MemoryStore().View(func(tx store.ReadTx) {
var allNodes []*api.Node
allNodes, err = store.FindNodes(tx, store.All)
if err != nil {
return
}
if len(allNodes) != 2 {
err = fmt.Errorf("expected 2 nodes, got %d", len(allNodes))
return
}
for i, nodeID := range []string{"id1", "id2"} {
n := store.GetNode(tx, nodeID)
if !reflect.DeepEqual(n, values[i]) {
err = fmt.Errorf("node %s did not match expected value", nodeID)
return
}
}
})
return err
}))
}
}
// markNodeNotReady sets the node state to some state other than READY
func (d *Dispatcher) markNodeNotReady(id string, state api.NodeStatus_State, message string) error {
if err := d.isRunningLocked(); err != nil {
return err
}
// Node is down. Add it to down nodes so that we can keep
// track of tasks assigned to the node.
var (
node *api.Node
err error
)
d.store.View(func(readTx store.ReadTx) {
node = store.GetNode(readTx, id)
if node == nil {
err = fmt.Errorf("could not find node %s while trying to add to down nodes store", id)
}
})
if err != nil {
return err
}
expireFunc := func() {
if err := d.moveTasksToOrphaned(id); err != nil {
log.G(context.TODO()).WithError(err).Error(`failed to move all tasks to "ORPHANED" state`)
}
d.downNodes.Delete(id)
}
d.downNodes.Add(node, expireFunc)
status := &api.NodeStatus{
State: state,
Message: message,
}
d.nodeUpdatesLock.Lock()
// pluck the description out of nodeUpdates. this protects against a case
// where a node is marked ready and a description is added, but then the
// node is immediately marked not ready. this preserves that description
d.nodeUpdates[id] = nodeUpdate{status: status, description: d.nodeUpdates[id].description}
numUpdates := len(d.nodeUpdates)
d.nodeUpdatesLock.Unlock()
if numUpdates >= maxBatchItems {
select {
case d.processUpdatesTrigger <- struct{}{}:
case <-d.ctx.Done():
}
}
if rn := d.nodes.Delete(id); rn == nil {
return errors.Errorf("node %s is not found in local storage", id)
}
return nil
}
// UpdateNode updates a Node referenced by NodeID with the given NodeSpec.
// - Returns `NotFound` if the Node is not found.
// - Returns `InvalidArgument` if the NodeSpec is malformed.
// - Returns an error if the update fails.
func (s *Server) UpdateNode(ctx context.Context, request *api.UpdateNodeRequest) (*api.UpdateNodeResponse, error) {
if request.NodeID == "" || request.NodeVersion == nil {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
if err := validateNodeSpec(request.Spec); err != nil {
return nil, err
}
var (
node *api.Node
demote bool
)
err := s.store.Update(func(tx store.Tx) error {
node = store.GetNode(tx, request.NodeID)
if node == nil {
return nil
}
// Demotion sanity checks.
if node.Spec.Role == api.NodeRoleManager && request.Spec.Role == api.NodeRoleWorker {
demote = true
managers, err := store.FindNodes(tx, store.ByRole(api.NodeRoleManager))
if err != nil {
return grpc.Errorf(codes.Internal, "internal store error: %v", err)
}
if len(managers) == 1 && managers[0].ID == node.ID {
return grpc.Errorf(codes.FailedPrecondition, "attempting to demote the last manager of the swarm")
}
}
node.Meta.Version = *request.NodeVersion
node.Spec = *request.Spec.Copy()
return store.UpdateNode(tx, node)
})
if err != nil {
return nil, err
}
if node == nil {
return nil, grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
if demote && s.raft != nil {
memberlist := s.raft.GetMemberlist()
for raftID, member := range memberlist {
if member.NodeID == request.NodeID {
if err := s.raft.RemoveMember(ctx, raftID); err != nil {
return nil, err
}
break
}
}
}
return &api.UpdateNodeResponse{
Node: node,
}, nil
}
// UpdateNode updates a Node referenced by NodeID with the given NodeSpec.
// - Returns `NotFound` if the Node is not found.
// - Returns `InvalidArgument` if the NodeSpec is malformed.
// - Returns an error if the update fails.
func (s *Server) UpdateNode(ctx context.Context, request *api.UpdateNodeRequest) (*api.UpdateNodeResponse, error) {
if request.NodeID == "" || request.NodeVersion == nil {
return nil, grpc.Errorf(codes.InvalidArgument, errInvalidArgument.Error())
}
if err := validateNodeSpec(request.Spec); err != nil {
return nil, err
}
var (
node *api.Node
member *membership.Member
)
err := s.store.Update(func(tx store.Tx) error {
node = store.GetNode(tx, request.NodeID)
if node == nil {
return grpc.Errorf(codes.NotFound, "node %s not found", request.NodeID)
}
// Demotion sanity checks.
if node.Spec.DesiredRole == api.NodeRoleManager && request.Spec.DesiredRole == api.NodeRoleWorker {
// Check for manager entries in Store.
managers, err := store.FindNodes(tx, store.ByRole(api.NodeRoleManager))
if err != nil {
return grpc.Errorf(codes.Internal, "internal store error: %v", err)
}
if len(managers) == 1 && managers[0].ID == node.ID {
return grpc.Errorf(codes.FailedPrecondition, "attempting to demote the last manager of the swarm")
}
// Check for node in memberlist
if member = s.raft.GetMemberByNodeID(request.NodeID); member == nil {
return grpc.Errorf(codes.NotFound, "can't find manager in raft memberlist")
}
// Quorum safeguard
if !s.raft.CanRemoveMember(member.RaftID) {
return grpc.Errorf(codes.FailedPrecondition, "can't remove member from the raft: this would result in a loss of quorum")
}
}
node.Meta.Version = *request.NodeVersion
node.Spec = *request.Spec.Copy()
return store.UpdateNode(tx, node)
})
if err != nil {
return nil, err
}
return &api.UpdateNodeResponse{
Node: node,
}, nil
}
func (d *Dispatcher) markNodesUnknown(ctx context.Context) error {
log := log.G(ctx).WithField("method", "(*Dispatcher).markNodesUnknown")
var nodes []*api.Node
var err error
d.store.View(func(tx store.ReadTx) {
nodes, err = store.FindNodes(tx, store.All)
})
if err != nil {
return fmt.Errorf("failed to get list of nodes: %v", err)
}
_, err = d.store.Batch(func(batch *store.Batch) error {
for _, n := range nodes {
err := batch.Update(func(tx store.Tx) error {
// check if node is still here
node := store.GetNode(tx, n.ID)
if node == nil {
return nil
}
// do not try to resurrect down nodes
if node.Status.State == api.NodeStatus_DOWN {
return nil
}
node.Status = api.NodeStatus{
State: api.NodeStatus_UNKNOWN,
Message: `Node moved to "unknown" state due to leadership change in cluster`,
}
nodeID := node.ID
expireFunc := func() {
log := log.WithField("node", nodeID)
nodeStatus := api.NodeStatus{State: api.NodeStatus_DOWN, Message: `heartbeat failure for node in "unknown" state`}
log.Debugf("heartbeat expiration for unknown node")
if err := d.nodeRemove(nodeID, nodeStatus); err != nil {
log.WithError(err).Errorf(`failed deregistering node after heartbeat expiration for node in "unknown" state`)
}
}
if err := d.nodes.AddUnknown(node, expireFunc); err != nil {
return fmt.Errorf(`adding node in "unknown" state to node store failed: %v`, err)
}
if err := store.UpdateNode(tx, node); err != nil {
return fmt.Errorf("update failed %v", err)
}
return nil
})
if err != nil {
log.WithField("node", n.ID).WithError(err).Errorf(`failed to move node to "unknown" state`)
}
}
return nil
})
return err
}
// register is used for registration of node with particular dispatcher.
func (d *Dispatcher) register(ctx context.Context, nodeID string, description *api.NodeDescription) (string, error) {
// prevent register until we're ready to accept it
if err := d.isRunningLocked(); err != nil {
return "", err
}
if err := d.nodes.CheckRateLimit(nodeID); err != nil {
return "", err
}
// create or update node in store
// TODO(stevvooe): Validate node specification.
var node *api.Node
err := d.store.Update(func(tx store.Tx) error {
node = store.GetNode(tx, nodeID)
if node == nil {
return ErrNodeNotFound
}
node.Description = description
node.Status = api.NodeStatus{
State: api.NodeStatus_READY,
}
return store.UpdateNode(tx, node)
})
if err != nil {
return "", err
}
expireFunc := func() {
nodeStatus := api.NodeStatus{State: api.NodeStatus_DOWN, Message: "heartbeat failure"}
log.G(ctx).Debugf("heartbeat expiration")
if err := d.nodeRemove(nodeID, nodeStatus); err != nil {
log.G(ctx).WithError(err).Errorf("failed deregistering node after heartbeat expiration")
}
}
rn := d.nodes.Add(node, expireFunc)
// NOTE(stevvooe): We need be a little careful with re-registration. The
// current implementation just matches the node id and then gives away the
// sessionID. If we ever want to use sessionID as a secret, which we may
// want to, this is giving away the keys to the kitchen.
//
// The right behavior is going to be informed by identity. Basically, each
// time a node registers, we invalidate the session and issue a new
// session, once identity is proven. This will cause misbehaved agents to
// be kicked when multiple connections are made.
return rn.SessionID, nil
}
// issueRenewCertificate receives a nodeID and a CSR and modifies the node's certificate entry with the new CSR
// and changes the state to RENEW, so it can be picked up and signed by the signing reconciliation loop
func (s *Server) issueRenewCertificate(ctx context.Context, nodeID string, csr []byte) (*api.IssueNodeCertificateResponse, error) {
var (
cert api.Certificate
node *api.Node
)
err := s.store.Update(func(tx store.Tx) error {
// Attempt to retrieve the node with nodeID
node = store.GetNode(tx, nodeID)
if node == nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"method": "issueRenewCertificate",
}).Warnf("node does not exist")
// If this node doesn't exist, we shouldn't be renewing a certificate for it
return grpc.Errorf(codes.NotFound, "node %s not found when attempting to renew certificate", nodeID)
}
// Create a new Certificate entry for this node with the new CSR and a RENEW state
cert = api.Certificate{
CSR: csr,
CN: node.ID,
Role: node.Spec.Role,
Status: api.IssuanceStatus{
State: api.IssuanceStateRenew,
},
}
node.Certificate = cert
return store.UpdateNode(tx, node)
})
if err != nil {
return nil, err
}
log.G(ctx).WithFields(logrus.Fields{
"cert.cn": cert.CN,
"cert.role": cert.Role,
"method": "issueRenewCertificate",
}).Debugf("node certificate updated")
return &api.IssueNodeCertificateResponse{
NodeID: nodeID,
NodeMembership: node.Spec.Membership,
}, nil
}
func TestForceRotationIsNoop(t *testing.T) {
tc := testutils.NewTestCA(t)
defer tc.Stop()
// Get a new Certificate issued
csr, _, err := ca.GenerateNewCSR()
assert.NoError(t, err)
issueRequest := &api.IssueNodeCertificateRequest{CSR: csr, Token: tc.WorkerToken}
issueResponse, err := tc.NodeCAClients[0].IssueNodeCertificate(context.Background(), issueRequest)
assert.NoError(t, err)
assert.NotNil(t, issueResponse.NodeID)
assert.Equal(t, api.NodeMembershipAccepted, issueResponse.NodeMembership)
// Check that the Certificate is successfully issued
statusRequest := &api.NodeCertificateStatusRequest{NodeID: issueResponse.NodeID}
statusResponse, err := tc.NodeCAClients[0].NodeCertificateStatus(context.Background(), statusRequest)
require.NoError(t, err)
assert.Equal(t, api.IssuanceStateIssued, statusResponse.Status.State)
assert.NotNil(t, statusResponse.Certificate.Certificate)
assert.Equal(t, api.NodeRoleWorker, statusResponse.Certificate.Role)
// Update the certificate status to IssuanceStateRotate which should be a server-side noop
err = tc.MemoryStore.Update(func(tx store.Tx) error {
// Attempt to retrieve the node with nodeID
node := store.GetNode(tx, issueResponse.NodeID)
assert.NotNil(t, node)
node.Certificate.Status.State = api.IssuanceStateRotate
return store.UpdateNode(tx, node)
})
assert.NoError(t, err)
// Wait a bit and check that the certificate hasn't changed/been reissued
time.Sleep(250 * time.Millisecond)
statusNewResponse, err := tc.NodeCAClients[0].NodeCertificateStatus(context.Background(), statusRequest)
require.NoError(t, err)
assert.Equal(t, statusResponse.Certificate.Certificate, statusNewResponse.Certificate.Certificate)
assert.Equal(t, api.IssuanceStateRotate, statusNewResponse.Certificate.Status.State)
assert.Equal(t, api.NodeRoleWorker, statusNewResponse.Certificate.Role)
}
func (a *Allocator) commitAllocatedNode(ctx context.Context, batch *store.Batch, node *api.Node) error {
if err := batch.Update(func(tx store.Tx) error {
err := store.UpdateNode(tx, node)
if err == store.ErrSequenceConflict {
storeNode := store.GetNode(tx, node.ID)
storeNode.Attachment = node.Attachment.Copy()
err = store.UpdateNode(tx, storeNode)
}
return errors.Wrapf(err, "failed updating state in store transaction for node %s", node.ID)
}); err != nil {
if err := a.netCtx.nwkAllocator.DeallocateNode(node); err != nil {
log.G(ctx).WithError(err).Errorf("failed rolling back allocation of node %s", node.ID)
}
return err
}
return nil
}
func (d *Dispatcher) nodeRemove(id string, status api.NodeStatus) error {
if err := d.isRunningLocked(); err != nil {
return err
}
// TODO(aaronl): Is it worth batching node removals?
err := d.store.Update(func(tx store.Tx) error {
node := store.GetNode(tx, id)
if node == nil {
return errors.New("node not found")
}
node.Status = status
return store.UpdateNode(tx, node)
})
if err != nil {
return fmt.Errorf("failed to update node %s status to down: %v", id, err)
}
if rn := d.nodes.Delete(id); rn == nil {
return fmt.Errorf("node %s is not found in local storage", id)
}
return nil
}
// signNodeCert does the bulk of the work for signing a certificate
func (s *Server) signNodeCert(ctx context.Context, node *api.Node) {
rootCA := s.securityConfig.RootCA()
externalCA := s.securityConfig.externalCA
node = node.Copy()
nodeID := node.ID
// Convert the role from proto format
role, err := ParseRole(node.Certificate.Role)
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("failed to parse role")
return
}
// Attempt to sign the CSR
var (
rawCSR = node.Certificate.CSR
cn = node.Certificate.CN
ou = role
org = s.securityConfig.ClientTLSCreds.Organization()
)
// Try using the external CA first.
cert, err := externalCA.Sign(PrepareCSR(rawCSR, cn, ou, org))
if err == ErrNoExternalCAURLs {
// No external CA servers configured. Try using the local CA.
cert, err = rootCA.ParseValidateAndSignCSR(rawCSR, cn, ou, org)
}
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("failed to sign CSR")
// If this error is due the lack of signer, maybe some other
// manager in the future will pick it up. Return without
// changing the state of the certificate.
if err == ErrNoValidSigner {
return
}
// If the current state is already Failed, no need to change it
if node.Certificate.Status.State == api.IssuanceStateFailed {
return
}
// We failed to sign this CSR, change the state to FAILED
err = s.store.Update(func(tx store.Tx) error {
node := store.GetNode(tx, nodeID)
if node == nil {
return fmt.Errorf("node %s not found", nodeID)
}
node.Certificate.Status = api.IssuanceStatus{
State: api.IssuanceStateFailed,
Err: err.Error(),
}
return store.UpdateNode(tx, node)
})
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("transaction failed when setting state to FAILED")
}
return
}
// We were able to successfully sign the new CSR. Let's try to update the nodeStore
for {
err = s.store.Update(func(tx store.Tx) error {
node.Certificate.Certificate = cert
node.Certificate.Status = api.IssuanceStatus{
State: api.IssuanceStateIssued,
}
err := store.UpdateNode(tx, node)
if err != nil {
node = store.GetNode(tx, nodeID)
if node == nil {
err = fmt.Errorf("node %s does not exist", nodeID)
}
}
return err
})
if err == nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"node.role": node.Certificate.Role,
"method": "(*Server).signNodeCert",
}).Debugf("certificate issued")
break
}
if err == store.ErrSequenceConflict {
continue
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("transaction failed")
return
}
}
func (r *Orchestrator) initTasks(ctx context.Context, readTx store.ReadTx) error {
tasks, err := store.FindTasks(readTx, store.All)
if err != nil {
return err
}
for _, t := range tasks {
if t.NodeID != "" {
n := store.GetNode(readTx, t.NodeID)
if invalidNode(n) && t.Status.State <= api.TaskStateRunning && t.DesiredState <= api.TaskStateRunning {
r.restartTasks[t.ID] = struct{}{}
}
}
}
_, err = r.store.Batch(func(batch *store.Batch) error {
for _, t := range tasks {
if t.ServiceID == "" {
continue
}
// TODO(aluzzardi): We should NOT retrieve the service here.
service := store.GetService(readTx, t.ServiceID)
if service == nil {
// Service was deleted
err := batch.Update(func(tx store.Tx) error {
return store.DeleteTask(tx, t.ID)
})
if err != nil {
log.G(ctx).WithError(err).Error("failed to set task desired state to dead")
}
continue
}
// TODO(aluzzardi): This is shady. We should have a more generic condition.
if t.DesiredState != api.TaskStateReady || !orchestrator.IsReplicatedService(service) {
continue
}
restartDelay := orchestrator.DefaultRestartDelay
if t.Spec.Restart != nil && t.Spec.Restart.Delay != nil {
var err error
restartDelay, err = gogotypes.DurationFromProto(t.Spec.Restart.Delay)
if err != nil {
log.G(ctx).WithError(err).Error("invalid restart delay")
restartDelay = orchestrator.DefaultRestartDelay
}
}
if restartDelay != 0 {
timestamp, err := gogotypes.TimestampFromProto(t.Status.Timestamp)
if err == nil {
restartTime := timestamp.Add(restartDelay)
calculatedRestartDelay := restartTime.Sub(time.Now())
if calculatedRestartDelay < restartDelay {
restartDelay = calculatedRestartDelay
}
if restartDelay > 0 {
_ = batch.Update(func(tx store.Tx) error {
t := store.GetTask(tx, t.ID)
// TODO(aluzzardi): This is shady as well. We should have a more generic condition.
if t == nil || t.DesiredState != api.TaskStateReady {
return nil
}
r.restarts.DelayStart(ctx, tx, nil, t.ID, restartDelay, true)
return nil
})
continue
}
} else {
log.G(ctx).WithError(err).Error("invalid status timestamp")
}
}
// Start now
err := batch.Update(func(tx store.Tx) error {
return r.restarts.StartNow(tx, t.ID)
})
if err != nil {
log.G(ctx).WithError(err).WithField("task.id", t.ID).Error("moving task out of delayed state failed")
}
}
return nil
})
return err
}
func TestConstraintEnforcer(t *testing.T) {
nodes := []*api.Node{
{
ID: "id1",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name1",
},
Availability: api.NodeAvailabilityActive,
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Role: api.NodeRoleWorker,
},
{
ID: "id2",
Spec: api.NodeSpec{
Annotations: api.Annotations{
Name: "name2",
},
Availability: api.NodeAvailabilityActive,
},
Status: api.NodeStatus{
State: api.NodeStatus_READY,
},
Description: &api.NodeDescription{
Resources: &api.Resources{
NanoCPUs: 1e9,
MemoryBytes: 1e9,
},
},
},
}
tasks := []*api.Task{
{
ID: "id0",
DesiredState: api.TaskStateRunning,
Spec: api.TaskSpec{
Placement: &api.Placement{
Constraints: []string{"node.role == manager"},
},
},
Status: api.TaskStatus{
State: api.TaskStateNew,
},
NodeID: "id1",
},
{
ID: "id1",
DesiredState: api.TaskStateRunning,
Status: api.TaskStatus{
State: api.TaskStateNew,
},
NodeID: "id1",
},
{
ID: "id2",
DesiredState: api.TaskStateRunning,
Spec: api.TaskSpec{
Placement: &api.Placement{
Constraints: []string{"node.role == worker"},
},
},
Status: api.TaskStatus{
State: api.TaskStateRunning,
},
NodeID: "id1",
},
{
ID: "id3",
DesiredState: api.TaskStateNew,
Status: api.TaskStatus{
State: api.TaskStateNew,
},
NodeID: "id2",
},
{
ID: "id4",
DesiredState: api.TaskStateReady,
Spec: api.TaskSpec{
Resources: &api.ResourceRequirements{
Reservations: &api.Resources{
MemoryBytes: 9e8,
},
},
},
Status: api.TaskStatus{
State: api.TaskStatePending,
},
NodeID: "id2",
},
}
s := store.NewMemoryStore(nil)
assert.NotNil(t, s)
defer s.Close()
err := s.Update(func(tx store.Tx) error {
// Prepoulate nodes
for _, n := range nodes {
assert.NoError(t, store.CreateNode(tx, n))
}
// Prepopulate tasks
for _, task := range tasks {
assert.NoError(t, store.CreateTask(tx, task))
}
return nil
})
assert.NoError(t, err)
watch, cancel := state.Watch(s.WatchQueue(), state.EventUpdateTask{})
defer cancel()
constraintEnforcer := New(s)
defer constraintEnforcer.Stop()
go constraintEnforcer.Run()
// id0 should be killed immediately
shutdown1 := testutils.WatchShutdownTask(t, watch)
assert.Equal(t, "id0", shutdown1.ID)
// Change node id1 to a manager
err = s.Update(func(tx store.Tx) error {
node := store.GetNode(tx, "id1")
if node == nil {
t.Fatal("could not get node id1")
}
node.Role = api.NodeRoleManager
assert.NoError(t, store.UpdateNode(tx, node))
return nil
})
assert.NoError(t, err)
shutdown2 := testutils.WatchShutdownTask(t, watch)
assert.Equal(t, "id2", shutdown2.ID)
// Change resources on node id2
err = s.Update(func(tx store.Tx) error {
node := store.GetNode(tx, "id2")
if node == nil {
t.Fatal("could not get node id2")
}
node.Description.Resources.MemoryBytes = 5e8
assert.NoError(t, store.UpdateNode(tx, node))
return nil
})
assert.NoError(t, err)
shutdown3 := testutils.WatchShutdownTask(t, watch)
assert.Equal(t, "id4", shutdown3.ID)
}
// Session is a stream which controls agent connection.
// Each message contains list of backup Managers with weights. Also there is
// a special boolean field Disconnect which if true indicates that node should
// reconnect to another Manager immediately.
func (d *Dispatcher) Session(r *api.SessionRequest, stream api.Dispatcher_SessionServer) error {
ctx := stream.Context()
nodeInfo, err := ca.RemoteNode(ctx)
if err != nil {
return err
}
nodeID := nodeInfo.NodeID
if err := d.isRunningLocked(); err != nil {
return err
}
// register the node.
sessionID, err := d.register(stream.Context(), nodeID, r.Description)
if err != nil {
return err
}
fields := logrus.Fields{
"node.id": nodeID,
"node.session": sessionID,
"method": "(*Dispatcher).Session",
}
if nodeInfo.ForwardedBy != nil {
fields["forwarder.id"] = nodeInfo.ForwardedBy.NodeID
}
log := log.G(ctx).WithFields(fields)
var nodeObj *api.Node
nodeUpdates, cancel, err := store.ViewAndWatch(d.store, func(readTx store.ReadTx) error {
nodeObj = store.GetNode(readTx, nodeID)
return nil
}, state.EventUpdateNode{Node: &api.Node{ID: nodeID},
Checks: []state.NodeCheckFunc{state.NodeCheckID}},
)
if cancel != nil {
defer cancel()
}
if err != nil {
log.WithError(err).Error("ViewAndWatch Node failed")
}
if _, err = d.nodes.GetWithSession(nodeID, sessionID); err != nil {
return err
}
if err := stream.Send(&api.SessionMessage{
SessionID: sessionID,
Node: nodeObj,
Managers: d.getManagers(),
NetworkBootstrapKeys: d.networkBootstrapKeys,
}); err != nil {
return err
}
managerUpdates, mgrCancel := d.mgrQueue.Watch()
defer mgrCancel()
keyMgrUpdates, keyMgrCancel := d.keyMgrQueue.Watch()
defer keyMgrCancel()
// disconnectNode is a helper forcibly shutdown connection
disconnectNode := func() error {
// force disconnect by shutting down the stream.
transportStream, ok := transport.StreamFromContext(stream.Context())
if ok {
// if we have the transport stream, we can signal a disconnect
// in the client.
if err := transportStream.ServerTransport().Close(); err != nil {
log.WithError(err).Error("session end")
}
}
nodeStatus := api.NodeStatus{State: api.NodeStatus_DISCONNECTED, Message: "node is currently trying to find new manager"}
if err := d.nodeRemove(nodeID, nodeStatus); err != nil {
log.WithError(err).Error("failed to remove node")
}
// still return an abort if the transport closure was ineffective.
return grpc.Errorf(codes.Aborted, "node must disconnect")
}
for {
// After each message send, we need to check the nodes sessionID hasn't
// changed. If it has, we will the stream and make the node
// re-register.
node, err := d.nodes.GetWithSession(nodeID, sessionID)
if err != nil {
return err
}
var mgrs []*api.WeightedPeer
var disconnect bool
select {
case ev := <-managerUpdates:
mgrs = ev.([]*api.WeightedPeer)
case ev := <-nodeUpdates:
nodeObj = ev.(state.EventUpdateNode).Node
case <-stream.Context().Done():
return stream.Context().Err()
case <-node.Disconnect:
disconnect = true
case <-d.ctx.Done():
disconnect = true
case <-keyMgrUpdates:
}
if mgrs == nil {
mgrs = d.getManagers()
}
if err := stream.Send(&api.SessionMessage{
SessionID: sessionID,
Node: nodeObj,
Managers: mgrs,
NetworkBootstrapKeys: d.networkBootstrapKeys,
}); err != nil {
return err
}
if disconnect {
return disconnectNode()
}
}
}
func (s *Scheduler) applySchedulingDecisions(ctx context.Context, schedulingDecisions map[string]schedulingDecision) (successful, failed []schedulingDecision) {
if len(schedulingDecisions) == 0 {
return
}
successful = make([]schedulingDecision, 0, len(schedulingDecisions))
// Apply changes to master store
applied, err := s.store.Batch(func(batch *store.Batch) error {
for len(schedulingDecisions) > 0 {
err := batch.Update(func(tx store.Tx) error {
// Update exactly one task inside this Update
// callback.
for taskID, decision := range schedulingDecisions {
delete(schedulingDecisions, taskID)
t := store.GetTask(tx, taskID)
if t == nil {
// Task no longer exists
nodeInfo, err := s.nodeSet.nodeInfo(decision.new.NodeID)
if err == nil && nodeInfo.removeTask(decision.new) {
s.nodeSet.updateNode(nodeInfo)
}
delete(s.allTasks, decision.old.ID)
continue
}
if t.Status.State == decision.new.Status.State && t.Status.Message == decision.new.Status.Message {
// No changes, ignore
continue
}
if t.Status.State >= api.TaskStateAssigned {
nodeInfo, err := s.nodeSet.nodeInfo(decision.new.NodeID)
if err != nil {
failed = append(failed, decision)
continue
}
node := store.GetNode(tx, decision.new.NodeID)
if node == nil || node.Meta.Version != nodeInfo.Meta.Version {
// node is out of date
failed = append(failed, decision)
continue
}
}
if err := store.UpdateTask(tx, decision.new); err != nil {
log.G(ctx).Debugf("scheduler failed to update task %s; will retry", taskID)
failed = append(failed, decision)
continue
}
successful = append(successful, decision)
return nil
}
return nil
})
if err != nil {
return err
}
}
return nil
})
if err != nil {
log.G(ctx).WithError(err).Error("scheduler tick transaction failed")
failed = append(failed, successful[applied:]...)
successful = successful[:applied]
}
return
}
// signNodeCert does the bulk of the work for signing a certificate
func (s *Server) signNodeCert(ctx context.Context, node *api.Node) {
if !s.securityConfig.RootCA().CanSign() {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"method": "(*Server).signNodeCert",
}).Errorf("no valid signer found")
return
}
node = node.Copy()
nodeID := node.ID
// Convert the role from proto format
role, err := ParseRole(node.Certificate.Role)
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("failed to parse role")
return
}
// Attempt to sign the CSR
cert, err := s.securityConfig.RootCA().ParseValidateAndSignCSR(node.Certificate.CSR, node.Certificate.CN, role, s.securityConfig.ClientTLSCreds.Organization())
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("failed to sign CSR")
// If this error is due the lack of signer, maybe some other
// manager in the future will pick it up. Return without
// changing the state of the certificate.
if err == ErrNoValidSigner {
return
}
// If the current state is already Failed, no need to change it
if node.Certificate.Status.State == api.IssuanceStateFailed {
return
}
// We failed to sign this CSR, change the state to FAILED
err = s.store.Update(func(tx store.Tx) error {
node := store.GetNode(tx, nodeID)
if node == nil {
return fmt.Errorf("node %s not found", nodeID)
}
node.Certificate.Status = api.IssuanceStatus{
State: api.IssuanceStateFailed,
Err: err.Error(),
}
return store.UpdateNode(tx, node)
})
if err != nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("transaction failed when setting state to FAILED")
}
return
}
// We were able to successfully sign the new CSR. Let's try to update the nodeStore
for {
err = s.store.Update(func(tx store.Tx) error {
// Remote nodes are expecting a full certificate chain, not just a signed certificate
node.Certificate.Certificate = append(cert, s.securityConfig.RootCA().Cert...)
node.Certificate.Status = api.IssuanceStatus{
State: api.IssuanceStateIssued,
}
err := store.UpdateNode(tx, node)
if err != nil {
node = store.GetNode(tx, nodeID)
if node == nil {
err = fmt.Errorf("node %s does not exist", nodeID)
}
}
return err
})
if err == nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"node.role": node.Certificate.Role,
"method": "(*Server).signNodeCert",
}).Debugf("certificate issued")
break
}
if err == store.ErrSequenceConflict {
continue
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"method": "(*Server).signNodeCert",
}).WithError(err).Errorf("transaction failed")
return
}
}
func TestRaftForceNewCluster(t *testing.T) {
t.Parallel()
nodes, clockSource := raftutils.NewRaftCluster(t, tc)
// Propose a value
values := make([]*api.Node, 2)
var err error
values[0], err = raftutils.ProposeValue(t, nodes[1], "id1")
assert.NoError(t, err, "failed to propose value")
// The memberlist should contain 3 members on each node
for i := 1; i <= 3; i++ {
assert.Equal(t, len(nodes[uint64(i)].GetMemberlist()), 3)
}
// Stop all nodes
for _, node := range nodes {
node.Server.Stop()
node.Shutdown()
}
raftutils.AdvanceTicks(clockSource, 5)
toClean := map[uint64]*raftutils.TestNode{
2: nodes[2],
3: nodes[3],
}
raftutils.TeardownCluster(t, toClean)
delete(nodes, 2)
delete(nodes, 3)
// Only restart the first node with force-new-cluster option
nodes[1] = raftutils.RestartNode(t, clockSource, nodes[1], true)
raftutils.WaitForCluster(t, clockSource, nodes)
// The memberlist should contain only one node (self)
assert.Equal(t, len(nodes[1].GetMemberlist()), 1)
// Add 2 more members
nodes[2] = raftutils.NewJoinNode(t, clockSource, nodes[1].Address, tc)
raftutils.WaitForCluster(t, clockSource, nodes)
nodes[3] = raftutils.NewJoinNode(t, clockSource, nodes[1].Address, tc)
raftutils.WaitForCluster(t, clockSource, nodes)
newCluster := map[uint64]*raftutils.TestNode{
1: nodes[1],
2: nodes[2],
3: nodes[3],
}
defer raftutils.TeardownCluster(t, newCluster)
// The memberlist should contain 3 members on each node
for i := 1; i <= 3; i++ {
assert.Equal(t, len(nodes[uint64(i)].GetMemberlist()), 3)
}
// Propose another value
values[1], err = raftutils.ProposeValue(t, raftutils.Leader(nodes), "id2")
assert.NoError(t, err, "failed to propose value")
for _, node := range nodes {
assert.NoError(t, raftutils.PollFunc(clockSource, func() error {
var err error
node.MemoryStore().View(func(tx store.ReadTx) {
var allNodes []*api.Node
allNodes, err = store.FindNodes(tx, store.All)
if err != nil {
return
}
if len(allNodes) != 2 {
err = fmt.Errorf("expected 2 nodes, got %d", len(allNodes))
return
}
for i, nodeID := range []string{"id1", "id2"} {
n := store.GetNode(tx, nodeID)
if !reflect.DeepEqual(n, values[i]) {
err = fmt.Errorf("node %s did not match expected value", nodeID)
return
}
}
})
return err
}))
}
}
// register is used for registration of node with particular dispatcher.
func (d *Dispatcher) register(ctx context.Context, nodeID string, description *api.NodeDescription) (string, error) {
// prevent register until we're ready to accept it
if err := d.isRunningLocked(); err != nil {
return "", err
}
if err := d.nodes.CheckRateLimit(nodeID); err != nil {
return "", err
}
// TODO(stevvooe): Validate node specification.
var node *api.Node
d.store.View(func(tx store.ReadTx) {
node = store.GetNode(tx, nodeID)
})
if node == nil {
return "", ErrNodeNotFound
}
d.nodeUpdatesLock.Lock()
d.nodeUpdates[nodeID] = nodeUpdate{status: &api.NodeStatus{State: api.NodeStatus_READY}, description: description}
numUpdates := len(d.nodeUpdates)
d.nodeUpdatesLock.Unlock()
if numUpdates >= maxBatchItems {
select {
case d.processUpdatesTrigger <- struct{}{}:
case <-d.ctx.Done():
return "", d.ctx.Err()
}
}
// Wait until the node update batch happens before unblocking register.
d.processUpdatesLock.Lock()
select {
case <-d.ctx.Done():
return "", d.ctx.Err()
default:
}
d.processUpdatesCond.Wait()
d.processUpdatesLock.Unlock()
expireFunc := func() {
nodeStatus := api.NodeStatus{State: api.NodeStatus_DOWN, Message: "heartbeat failure"}
log.G(ctx).Debugf("heartbeat expiration")
if err := d.nodeRemove(nodeID, nodeStatus); err != nil {
log.G(ctx).WithError(err).Errorf("failed deregistering node after heartbeat expiration")
}
}
rn := d.nodes.Add(node, expireFunc)
// NOTE(stevvooe): We need be a little careful with re-registration. The
// current implementation just matches the node id and then gives away the
// sessionID. If we ever want to use sessionID as a secret, which we may
// want to, this is giving away the keys to the kitchen.
//
// The right behavior is going to be informed by identity. Basically, each
// time a node registers, we invalidate the session and issue a new
// session, once identity is proven. This will cause misbehaved agents to
// be kicked when multiple connections are made.
return rn.SessionID, nil
}
// NodeCertificateStatus returns the current issuance status of an issuance request identified by the nodeID
func (s *Server) NodeCertificateStatus(ctx context.Context, request *api.NodeCertificateStatusRequest) (*api.NodeCertificateStatusResponse, error) {
if request.NodeID == "" {
return nil, grpc.Errorf(codes.InvalidArgument, codes.InvalidArgument.String())
}
if err := s.addTask(); err != nil {
return nil, err
}
defer s.doneTask()
var node *api.Node
event := state.EventUpdateNode{
Node: &api.Node{ID: request.NodeID},
Checks: []state.NodeCheckFunc{state.NodeCheckID},
}
// Retrieve the current value of the certificate with this token, and create a watcher
updates, cancel, err := store.ViewAndWatch(
s.store,
func(tx store.ReadTx) error {
node = store.GetNode(tx, request.NodeID)
return nil
},
event,
)
if err != nil {
return nil, err
}
defer cancel()
// This node ID doesn't exist
if node == nil {
return nil, grpc.Errorf(codes.NotFound, codes.NotFound.String())
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"status": node.Certificate.Status,
"method": "NodeCertificateStatus",
})
// If this certificate has a final state, return it immediately (both pending and renew are transition states)
if isFinalState(node.Certificate.Status) {
return &api.NodeCertificateStatusResponse{
Status: &node.Certificate.Status,
Certificate: &node.Certificate,
}, nil
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": node.ID,
"status": node.Certificate.Status,
"method": "NodeCertificateStatus",
}).Debugf("started watching for certificate updates")
// Certificate is Pending or in an Unknown state, let's wait for changes.
for {
select {
case event := <-updates:
switch v := event.(type) {
case state.EventUpdateNode:
// We got an update on the certificate record. If the status is a final state,
// return the certificate.
if isFinalState(v.Node.Certificate.Status) {
cert := v.Node.Certificate.Copy()
return &api.NodeCertificateStatusResponse{
Status: &cert.Status,
Certificate: cert,
}, nil
}
}
case <-ctx.Done():
return nil, ctx.Err()
case <-s.ctx.Done():
return nil, s.ctx.Err()
}
}
}
func (d *Dispatcher) processUpdates(ctx context.Context) {
var (
taskUpdates map[string]*api.TaskStatus
nodeUpdates map[string]nodeUpdate
)
d.taskUpdatesLock.Lock()
if len(d.taskUpdates) != 0 {
taskUpdates = d.taskUpdates
d.taskUpdates = make(map[string]*api.TaskStatus)
}
d.taskUpdatesLock.Unlock()
d.nodeUpdatesLock.Lock()
if len(d.nodeUpdates) != 0 {
nodeUpdates = d.nodeUpdates
d.nodeUpdates = make(map[string]nodeUpdate)
}
d.nodeUpdatesLock.Unlock()
if len(taskUpdates) == 0 && len(nodeUpdates) == 0 {
return
}
log := log.G(ctx).WithFields(logrus.Fields{
"method": "(*Dispatcher).processUpdates",
})
_, err := d.store.Batch(func(batch *store.Batch) error {
for taskID, status := range taskUpdates {
err := batch.Update(func(tx store.Tx) error {
logger := log.WithField("task.id", taskID)
task := store.GetTask(tx, taskID)
if task == nil {
logger.Errorf("task unavailable")
return nil
}
logger = logger.WithField("state.transition", fmt.Sprintf("%v->%v", task.Status.State, status.State))
if task.Status == *status {
logger.Debug("task status identical, ignoring")
return nil
}
if task.Status.State > status.State {
logger.Debug("task status invalid transition")
return nil
}
task.Status = *status
if err := store.UpdateTask(tx, task); err != nil {
logger.WithError(err).Error("failed to update task status")
return nil
}
logger.Debug("task status updated")
return nil
})
if err != nil {
log.WithError(err).Error("dispatcher task update transaction failed")
}
}
for nodeID, nodeUpdate := range nodeUpdates {
err := batch.Update(func(tx store.Tx) error {
logger := log.WithField("node.id", nodeID)
node := store.GetNode(tx, nodeID)
if node == nil {
logger.Errorf("node unavailable")
return nil
}
if nodeUpdate.status != nil {
node.Status.State = nodeUpdate.status.State
node.Status.Message = nodeUpdate.status.Message
if nodeUpdate.status.Addr != "" {
node.Status.Addr = nodeUpdate.status.Addr
}
}
if nodeUpdate.description != nil {
node.Description = nodeUpdate.description
}
if err := store.UpdateNode(tx, node); err != nil {
logger.WithError(err).Error("failed to update node status")
return nil
}
logger.Debug("node status updated")
return nil
})
if err != nil {
log.WithError(err).Error("dispatcher node update transaction failed")
}
}
return nil
})
if err != nil {
log.WithError(err).Error("dispatcher batch failed")
}
d.processUpdatesCond.Broadcast()
}
func (d *Dispatcher) markNodesUnknown(ctx context.Context) error {
log := log.G(ctx).WithField("method", "(*Dispatcher).markNodesUnknown")
var nodes []*api.Node
var err error
d.store.View(func(tx store.ReadTx) {
nodes, err = store.FindNodes(tx, store.All)
})
if err != nil {
return errors.Wrap(err, "failed to get list of nodes")
}
_, err = d.store.Batch(func(batch *store.Batch) error {
for _, n := range nodes {
err := batch.Update(func(tx store.Tx) error {
// check if node is still here
node := store.GetNode(tx, n.ID)
if node == nil {
return nil
}
// do not try to resurrect down nodes
if node.Status.State == api.NodeStatus_DOWN {
nodeCopy := node
expireFunc := func() {
if err := d.moveTasksToOrphaned(nodeCopy.ID); err != nil {
log.WithError(err).Error(`failed to move all tasks to "ORPHANED" state`)
}
d.downNodes.Delete(nodeCopy.ID)
}
d.downNodes.Add(nodeCopy, expireFunc)
return nil
}
node.Status.State = api.NodeStatus_UNKNOWN
node.Status.Message = `Node moved to "unknown" state due to leadership change in cluster`
nodeID := node.ID
expireFunc := func() {
log := log.WithField("node", nodeID)
log.Debugf("heartbeat expiration for unknown node")
if err := d.markNodeNotReady(nodeID, api.NodeStatus_DOWN, `heartbeat failure for node in "unknown" state`); err != nil {
log.WithError(err).Errorf(`failed deregistering node after heartbeat expiration for node in "unknown" state`)
}
}
if err := d.nodes.AddUnknown(node, expireFunc); err != nil {
return errors.Wrap(err, `adding node in "unknown" state to node store failed`)
}
if err := store.UpdateNode(tx, node); err != nil {
return errors.Wrap(err, "update failed")
}
return nil
})
if err != nil {
log.WithField("node", n.ID).WithError(err).Errorf(`failed to move node to "unknown" state`)
}
}
return nil
})
return err
}