Beispiel #1
0
// 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
}
Beispiel #2
0
// 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
}
Beispiel #3
0
// ListNodes returns a list of all nodes.
func (s *Server) ListNodes(ctx context.Context, request *api.ListNodesRequest) (*api.ListNodesResponse, error) {
	var (
		nodes []*api.Node
		err   error
	)
	s.store.View(func(tx store.ReadTx) {
		switch {
		case request.Filters != nil && len(request.Filters.Names) > 0:
			nodes, err = store.FindNodes(tx, buildFilters(store.ByName, request.Filters.Names))
		case request.Filters != nil && len(request.Filters.NamePrefixes) > 0:
			nodes, err = store.FindNodes(tx, buildFilters(store.ByNamePrefix, request.Filters.NamePrefixes))
		case request.Filters != nil && len(request.Filters.IDPrefixes) > 0:
			nodes, err = store.FindNodes(tx, buildFilters(store.ByIDPrefix, request.Filters.IDPrefixes))
		case request.Filters != nil && len(request.Filters.Roles) > 0:
			filters := make([]store.By, 0, len(request.Filters.Roles))
			for _, v := range request.Filters.Roles {
				filters = append(filters, store.ByRole(v))
			}
			nodes, err = store.FindNodes(tx, store.Or(filters...))
		case request.Filters != nil && len(request.Filters.Memberships) > 0:
			filters := make([]store.By, 0, len(request.Filters.Memberships))
			for _, v := range request.Filters.Memberships {
				filters = append(filters, store.ByMembership(v))
			}
			nodes, err = store.FindNodes(tx, store.Or(filters...))
		default:
			nodes, err = store.FindNodes(tx, store.All)
		}
	})
	if err != nil {
		return nil, err
	}

	if request.Filters != nil {
		nodes = filterNodes(nodes,
			func(e *api.Node) bool {
				if len(request.Filters.Names) == 0 {
					return true
				}
				if e.Description == nil {
					return false
				}
				return filterContains(e.Description.Hostname, request.Filters.Names)
			},
			func(e *api.Node) bool {
				if len(request.Filters.NamePrefixes) == 0 {
					return true
				}
				if e.Description == nil {
					return false
				}
				return filterContainsPrefix(e.Description.Hostname, request.Filters.NamePrefixes)
			},
			func(e *api.Node) bool {
				return filterContainsPrefix(e.ID, request.Filters.IDPrefixes)
			},
			func(e *api.Node) bool {
				if len(request.Filters.Labels) == 0 {
					return true
				}
				if e.Description == nil {
					return false
				}
				return filterMatchLabels(e.Description.Engine.Labels, request.Filters.Labels)
			},
			func(e *api.Node) bool {
				if len(request.Filters.Roles) == 0 {
					return true
				}
				for _, c := range request.Filters.Roles {
					if c == e.Spec.Role {
						return true
					}
				}
				return false
			},
			func(e *api.Node) bool {
				if len(request.Filters.Memberships) == 0 {
					return true
				}
				for _, c := range request.Filters.Memberships {
					if c == e.Spec.Membership {
						return true
					}
				}
				return false
			},
		)
	}

	// Add in manager information on nodes that are managers
	if s.raft != nil {
		memberlist := s.raft.GetMemberlist()

		for _, node := range nodes {
			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.ListNodesResponse{
		Nodes: nodes,
	}, nil
}