func newListNodesFilters(filter filters.Args) (*swarmapi.ListNodesRequest_Filters, error) {
accepted := map[string]bool{
"name": true,
"id": true,
"label": true,
"role": true,
"membership": true,
}
if err := filter.Validate(accepted); err != nil {
return nil, err
}
f := &swarmapi.ListNodesRequest_Filters{
Names: filter.Get("name"),
IDPrefixes: filter.Get("id"),
Labels: runconfigopts.ConvertKVStringsToMap(filter.Get("label")),
}
for _, r := range filter.Get("role") {
if role, ok := swarmapi.NodeRole_value[strings.ToUpper(r)]; ok {
f.Roles = append(f.Roles, swarmapi.NodeRole(role))
} else if r != "" {
return nil, fmt.Errorf("Invalid role filter: '%s'", r)
}
}
for _, a := range filter.Get("membership") {
if membership, ok := swarmapi.NodeSpec_Membership_value[strings.ToUpper(a)]; ok {
f.Memberships = append(f.Memberships, swarmapi.NodeSpec_Membership(membership))
} else if a != "" {
return nil, fmt.Errorf("Invalid membership filter: '%s'", a)
}
}
return f, nil
}
// NodeSpecToGRPC converts a NodeSpec to a grpc NodeSpec.
func NodeSpecToGRPC(s types.NodeSpec) (swarmapi.NodeSpec, error) {
spec := swarmapi.NodeSpec{
Annotations: swarmapi.Annotations{
Name: s.Name,
Labels: s.Labels,
},
}
if role, ok := swarmapi.NodeRole_value[strings.ToUpper(string(s.Role))]; ok {
spec.Role = swarmapi.NodeRole(role)
} else {
return swarmapi.NodeSpec{}, fmt.Errorf("invalid Role: %q", s.Role)
}
if membership, ok := swarmapi.NodeSpec_Membership_value[strings.ToUpper(string(s.Membership))]; ok {
spec.Membership = swarmapi.NodeSpec_Membership(membership)
} else {
return swarmapi.NodeSpec{}, fmt.Errorf("invalid Membership: %q", s.Membership)
}
if availability, ok := swarmapi.NodeSpec_Availability_value[strings.ToUpper(string(s.Availability))]; ok {
spec.Availability = swarmapi.NodeSpec_Availability(availability)
} else {
return swarmapi.NodeSpec{}, fmt.Errorf("invalid Availability: %q", s.Availability)
}
return spec, nil
}
// SwarmSpecUpdateAcceptancePolicy updates a grpc ClusterSpec using AcceptancePolicy.
func SwarmSpecUpdateAcceptancePolicy(spec *swarmapi.ClusterSpec, acceptancePolicy types.AcceptancePolicy) error {
spec.AcceptancePolicy.Policies = nil
for _, p := range acceptancePolicy.Policies {
role, ok := swarmapi.NodeRole_value[strings.ToUpper(string(p.Role))]
if !ok {
return fmt.Errorf("invalid Role: %q", p.Role)
}
policy := &swarmapi.AcceptancePolicy_RoleAdmissionPolicy{
Role: swarmapi.NodeRole(role),
Autoaccept: p.Autoaccept,
}
if p.Secret != "" {
hashPwd, _ := bcrypt.GenerateFromPassword([]byte(p.Secret), 0)
policy.Secret = &swarmapi.AcceptancePolicy_RoleAdmissionPolicy_HashedSecret{
Data: hashPwd,
Alg: "bcrypt",
}
}
spec.AcceptancePolicy.Policies = append(spec.AcceptancePolicy.Policies, policy)
}
return nil
}
// SwarmSpecUpdateAcceptancePolicy updates a grpc ClusterSpec using AcceptancePolicy.
func SwarmSpecUpdateAcceptancePolicy(spec *swarmapi.ClusterSpec, acceptancePolicy types.AcceptancePolicy, oldSpec *swarmapi.ClusterSpec) error {
spec.AcceptancePolicy.Policies = nil
hashs := make(map[string][]byte)
for _, p := range acceptancePolicy.Policies {
role, ok := swarmapi.NodeRole_value[strings.ToUpper(string(p.Role))]
if !ok {
return fmt.Errorf("invalid Role: %q", p.Role)
}
policy := &swarmapi.AcceptancePolicy_RoleAdmissionPolicy{
Role: swarmapi.NodeRole(role),
Autoaccept: p.Autoaccept,
}
if p.Secret != nil {
if *p.Secret == "" { // if provided secret is empty, it means erase previous secret.
policy.Secret = nil
} else { // if provided secret is not empty, we generate a new one.
hashPwd, ok := hashs[*p.Secret]
if !ok {
hashPwd, _ = bcrypt.GenerateFromPassword([]byte(*p.Secret), 0)
hashs[*p.Secret] = hashPwd
}
policy.Secret = &swarmapi.AcceptancePolicy_RoleAdmissionPolicy_Secret{
Data: hashPwd,
Alg: "bcrypt",
}
}
} else if oldSecret := getOldSecret(oldSpec, policy.Role); oldSecret != nil { // else use the old one.
policy.Secret = &swarmapi.AcceptancePolicy_RoleAdmissionPolicy_Secret{
Data: oldSecret.Data,
Alg: oldSecret.Alg,
}
}
spec.AcceptancePolicy.Policies = append(spec.AcceptancePolicy.Policies, policy)
}
return nil
}
// IssueNodeCertificate is responsible for gatekeeping both certificate requests from new nodes in the swarm,
// and authorizing certificate renewals.
// If a node presented a valid certificate, the corresponding certificate is set in a RENEW state.
// If a node failed to present a valid certificate, we check for a valid join token and set the
// role accordingly. A new random node ID is generated, and the corresponding node entry is created.
// IssueNodeCertificate is the only place where new node entries to raft should be created.
func (s *Server) IssueNodeCertificate(ctx context.Context, request *api.IssueNodeCertificateRequest) (*api.IssueNodeCertificateResponse, error) {
// First, let's see if the remote node is presenting a non-empty CSR
if len(request.CSR) == 0 {
return nil, grpc.Errorf(codes.InvalidArgument, codes.InvalidArgument.String())
}
if err := s.addTask(); err != nil {
return nil, err
}
defer s.doneTask()
// If the remote node is an Agent (either forwarded by a manager, or calling directly),
// issue a renew agent certificate entry with the correct ID
nodeID, err := AuthorizeForwardedRoleAndOrg(ctx, []string{AgentRole}, []string{ManagerRole}, s.securityConfig.ClientTLSCreds.Organization())
if err == nil {
return s.issueRenewCertificate(ctx, nodeID, request.CSR)
}
// If the remote node is a Manager (either forwarded by another manager, or calling directly),
// issue a renew certificate entry with the correct ID
nodeID, err = AuthorizeForwardedRoleAndOrg(ctx, []string{ManagerRole}, []string{ManagerRole}, s.securityConfig.ClientTLSCreds.Organization())
if err == nil {
return s.issueRenewCertificate(ctx, nodeID, request.CSR)
}
// The remote node didn't successfully present a valid MTLS certificate, let's issue a
// certificate with a new random ID
role := api.NodeRole(-1)
s.mu.Lock()
if subtle.ConstantTimeCompare([]byte(s.joinTokens.Manager), []byte(request.Token)) == 1 {
role = api.NodeRoleManager
} else if subtle.ConstantTimeCompare([]byte(s.joinTokens.Worker), []byte(request.Token)) == 1 {
role = api.NodeRoleWorker
}
s.mu.Unlock()
if role < 0 {
return nil, grpc.Errorf(codes.InvalidArgument, "A valid join token is necessary to join this cluster")
}
// Max number of collisions of ID or CN to tolerate before giving up
maxRetries := 3
// Generate a random ID for this new node
for i := 0; ; i++ {
nodeID = identity.NewID()
// Create a new node
err := s.store.Update(func(tx store.Tx) error {
node := &api.Node{
ID: nodeID,
Certificate: api.Certificate{
CSR: request.CSR,
CN: nodeID,
Role: role,
Status: api.IssuanceStatus{
State: api.IssuanceStatePending,
},
},
Spec: api.NodeSpec{
Role: role,
Membership: api.NodeMembershipAccepted,
},
}
return store.CreateNode(tx, node)
})
if err == nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"node.role": role,
"method": "IssueNodeCertificate",
}).Debugf("new certificate entry added")
break
}
if err != store.ErrExist {
return nil, err
}
if i == maxRetries {
return nil, err
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"node.role": role,
"method": "IssueNodeCertificate",
}).Errorf("randomly generated node ID collided with an existing one - retrying")
}
return &api.IssueNodeCertificateResponse{
NodeID: nodeID,
NodeMembership: api.NodeMembershipAccepted,
}, nil
}
// IssueNodeCertificate is responsible for gatekeeping both certificate requests from new nodes in the swarm,
// and authorizing certificate renewals.
// If a node presented a valid certificate, the corresponding certificate is set in a RENEW state.
// If a node failed to present a valid certificate, we check for a valid join token and set the
// role accordingly. A new random node ID is generated, and the corresponding node entry is created.
// IssueNodeCertificate is the only place where new node entries to raft should be created.
func (s *Server) IssueNodeCertificate(ctx context.Context, request *api.IssueNodeCertificateRequest) (*api.IssueNodeCertificateResponse, error) {
// First, let's see if the remote node is presenting a non-empty CSR
if len(request.CSR) == 0 {
return nil, grpc.Errorf(codes.InvalidArgument, codes.InvalidArgument.String())
}
if _, err := s.isRunningLocked(); err != nil {
return nil, err
}
var (
blacklistedCerts map[string]*api.BlacklistedCertificate
clusters []*api.Cluster
err error
)
s.store.View(func(readTx store.ReadTx) {
clusters, err = store.FindClusters(readTx, store.ByName("default"))
})
// Not having a cluster object yet means we can't check
// the blacklist.
if err == nil && len(clusters) == 1 {
blacklistedCerts = clusters[0].BlacklistedCertificates
}
// Renewing the cert with a local (unix socket) is always valid.
localNodeInfo := ctx.Value(LocalRequestKey)
if localNodeInfo != nil {
nodeInfo, ok := localNodeInfo.(RemoteNodeInfo)
if ok && nodeInfo.NodeID != "" {
return s.issueRenewCertificate(ctx, nodeInfo.NodeID, request.CSR)
}
}
// If the remote node is a worker (either forwarded by a manager, or calling directly),
// issue a renew worker certificate entry with the correct ID
nodeID, err := AuthorizeForwardedRoleAndOrg(ctx, []string{WorkerRole}, []string{ManagerRole}, s.securityConfig.ClientTLSCreds.Organization(), blacklistedCerts)
if err == nil {
return s.issueRenewCertificate(ctx, nodeID, request.CSR)
}
// If the remote node is a manager (either forwarded by another manager, or calling directly),
// issue a renew certificate entry with the correct ID
nodeID, err = AuthorizeForwardedRoleAndOrg(ctx, []string{ManagerRole}, []string{ManagerRole}, s.securityConfig.ClientTLSCreds.Organization(), blacklistedCerts)
if err == nil {
return s.issueRenewCertificate(ctx, nodeID, request.CSR)
}
// The remote node didn't successfully present a valid MTLS certificate, let's issue a
// certificate with a new random ID
role := api.NodeRole(-1)
s.mu.Lock()
if subtle.ConstantTimeCompare([]byte(s.joinTokens.Manager), []byte(request.Token)) == 1 {
role = api.NodeRoleManager
} else if subtle.ConstantTimeCompare([]byte(s.joinTokens.Worker), []byte(request.Token)) == 1 {
role = api.NodeRoleWorker
}
s.mu.Unlock()
if role < 0 {
return nil, grpc.Errorf(codes.InvalidArgument, "A valid join token is necessary to join this cluster")
}
// Max number of collisions of ID or CN to tolerate before giving up
maxRetries := 3
// Generate a random ID for this new node
for i := 0; ; i++ {
nodeID = identity.NewID()
// Create a new node
err := s.store.Update(func(tx store.Tx) error {
node := &api.Node{
Role: role,
ID: nodeID,
Certificate: api.Certificate{
CSR: request.CSR,
CN: nodeID,
Role: role,
Status: api.IssuanceStatus{
State: api.IssuanceStatePending,
},
},
Spec: api.NodeSpec{
DesiredRole: role,
Membership: api.NodeMembershipAccepted,
Availability: request.Availability,
},
}
return store.CreateNode(tx, node)
})
if err == nil {
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"node.role": role,
"method": "IssueNodeCertificate",
}).Debugf("new certificate entry added")
break
}
if err != store.ErrExist {
return nil, err
}
if i == maxRetries {
return nil, err
}
log.G(ctx).WithFields(logrus.Fields{
"node.id": nodeID,
"node.role": role,
"method": "IssueNodeCertificate",
}).Errorf("randomly generated node ID collided with an existing one - retrying")
}
return &api.IssueNodeCertificateResponse{
NodeID: nodeID,
NodeMembership: api.NodeMembershipAccepted,
}, nil
}