mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-26 16:09:45 -05:00
467 lines
15 KiB
Go
467 lines
15 KiB
Go
package pubapi
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import (
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"context"
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"errors"
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"fmt"
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"net"
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"time"
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"github.com/edgelesssys/constellation/coordinator/config"
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"github.com/edgelesssys/constellation/coordinator/peer"
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"github.com/edgelesssys/constellation/coordinator/pubapi/pubproto"
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"github.com/edgelesssys/constellation/coordinator/role"
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"github.com/edgelesssys/constellation/coordinator/state"
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"github.com/edgelesssys/constellation/state/keyservice/keyproto"
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"go.uber.org/zap"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// ActivateAsCoordinator is the RPC call to activate the Coordinator.
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func (a *API) ActivateAsCoordinator(in *pubproto.ActivateAsCoordinatorRequest, srv pubproto.API_ActivateAsCoordinatorServer) (reterr error) {
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a.mut.Lock()
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defer a.mut.Unlock()
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if err := a.core.RequireState(state.AcceptingInit); err != nil {
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return status.Errorf(codes.FailedPrecondition, "node is not in required state: %v", err)
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}
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if len(in.MasterSecret) == 0 {
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a.logger.Error("missing master secret")
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return status.Error(codes.InvalidArgument, "missing master secret")
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}
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logToCLI := a.newLogToCLIFunc(func(msg string) error {
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return srv.Send(&pubproto.ActivateAsCoordinatorResponse{
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Content: &pubproto.ActivateAsCoordinatorResponse_Log{
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Log: &pubproto.Log{
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Message: msg,
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},
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},
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})
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})
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logToCLI("Initializing first Coordinator ...")
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// If any of the following actions fail, we cannot revert
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// Thus, mark this peer as failed.
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defer func() {
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if reterr != nil {
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_ = a.core.AdvanceState(state.Failed, nil, nil)
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}
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}()
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// AdvanceState MUST be called before any other functions that are not sanity checks or otherwise required
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// This ensures the node is marked as initialzed before the node is in a state that allows code execution
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// Any new additions to ActivateAsNode MUST come after
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if err := a.core.InitializeStoreIPs(); err != nil {
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return status.Errorf(codes.Internal, "initialize store IPs: %v", err)
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}
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ownerID, clusterID, err := a.core.GetIDs(in.MasterSecret)
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if err != nil {
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return status.Errorf(codes.Internal, "%v", err)
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}
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if err := a.core.AdvanceState(state.ActivatingNodes, ownerID, clusterID); err != nil {
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return status.Errorf(codes.Internal, "advance state to ActivatingNodes: %v", err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
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defer cancel()
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if err := a.core.SetUpKMS(ctx, in.StorageUri, in.KmsUri, in.KeyEncryptionKeyId, in.UseExistingKek); err != nil {
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return status.Errorf(codes.Internal, "setting up KMS: %v", err)
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}
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vpnIP, err := a.core.GetNextCoordinatorIP()
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if err != nil {
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return status.Errorf(codes.Internal, "get coordinator vpn IP address: %v", err)
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}
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coordPeer, err := a.assemblePeerStruct(vpnIP, role.Coordinator)
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if err != nil {
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return status.Errorf(codes.Internal, "assembling the coordinator peer struct: %v", err)
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}
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if err := a.core.SetVPNIP(coordPeer.VPNIP); err != nil {
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return status.Errorf(codes.Internal, "set the vpn IP address: %v", err)
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}
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if err := a.core.AddPeer(coordPeer); err != nil {
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return status.Errorf(codes.Internal, "adding the coordinator to store/vpn: %v", err)
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}
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logToCLI("Initializing Kubernetes ...")
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kubeconfig, err := a.core.InitCluster(in.AutoscalingNodeGroups, in.CloudServiceAccountUri)
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if err != nil {
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return status.Errorf(codes.Internal, "initializing kubernetes cluster failed: %v", err)
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}
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// run the VPN-API server
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if err := a.vpnAPIServer.Listen(net.JoinHostPort(coordPeer.VPNIP, vpnAPIPort)); err != nil {
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return status.Errorf(codes.Internal, "start vpnAPIServer: %v", err)
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}
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a.wgClose.Add(1)
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go func() {
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defer a.wgClose.Done()
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if err := a.vpnAPIServer.Serve(); err != nil {
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panic(err)
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}
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}()
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// TODO: check performance and maybe make concurrent
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if err := a.activateNodes(logToCLI, in.NodePublicIps); err != nil {
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a.logger.Error("node activation failed", zap.Error(err))
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return status.Errorf(codes.Internal, "node initialization: %v", err)
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}
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if err := a.core.SwitchToPersistentStore(); err != nil {
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return status.Errorf(codes.Internal, "switch to persistent store: %v", err)
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}
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// persist node state on disk
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if err := a.core.PersistNodeState(role.Coordinator, ownerID, clusterID); err != nil {
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return status.Errorf(codes.Internal, "persist node state: %v", err)
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}
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diskUUID, err := a.core.GetDiskUUID()
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if err != nil {
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return status.Errorf(codes.Internal, "getting disk uuid: %v", err)
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}
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diskKey, err := a.core.GetDataKey(ctx, diskUUID, 32)
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if err != nil {
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return status.Errorf(codes.Internal, "getting disk key: %v", err)
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}
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if err := a.core.UpdateDiskPassphrase(string(diskKey)); err != nil {
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return status.Errorf(codes.Internal, "updating disk key: %v", err)
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}
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adminVPNIP, err := a.core.GetNextNodeIP()
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if err != nil {
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return status.Errorf(codes.Internal, "requesting node IP address: %v", err)
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}
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// This effectively gives code execution, so we do this last.
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err = a.core.AddPeer(peer.Peer{
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VPNIP: adminVPNIP,
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VPNPubKey: in.AdminVpnPubKey,
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Role: role.Admin,
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})
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if err != nil {
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return status.Errorf(codes.Internal, "add peer to store/vpn: %v", err)
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}
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return srv.Send(&pubproto.ActivateAsCoordinatorResponse{
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Content: &pubproto.ActivateAsCoordinatorResponse_AdminConfig{
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AdminConfig: &pubproto.AdminConfig{
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AdminVpnIp: adminVPNIP,
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CoordinatorVpnPubKey: coordPeer.VPNPubKey,
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Kubeconfig: kubeconfig,
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OwnerId: ownerID,
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ClusterId: clusterID,
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},
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},
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})
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}
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// ActivateAdditionalNodes is the RPC call to activate additional nodes.
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func (a *API) ActivateAdditionalNodes(in *pubproto.ActivateAdditionalNodesRequest, srv pubproto.API_ActivateAdditionalNodesServer) error {
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if err := a.core.RequireState(state.ActivatingNodes); err != nil {
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return status.Errorf(codes.FailedPrecondition, "%v", err)
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}
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logToCLI := a.newLogToCLIFunc(func(msg string) error {
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return srv.Send(&pubproto.ActivateAdditionalNodesResponse{
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Log: &pubproto.Log{
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Message: msg,
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},
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})
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})
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// TODO: check performance and maybe make concurrent
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if err := a.activateNodes(logToCLI, in.NodePublicIps); err != nil {
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a.logger.Error("node activation failed", zap.Error(err))
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return status.Errorf(codes.Internal, "activating nodes: %v", err)
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}
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return srv.Send(&pubproto.ActivateAdditionalNodesResponse{
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Log: &pubproto.Log{
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Message: "success",
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},
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})
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}
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// RequestStateDiskKey triggers the Coordinator to return a key derived from the Constellation's master secret to the caller.
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func (a *API) RequestStateDiskKey(ctx context.Context, in *pubproto.RequestStateDiskKeyRequest) (*pubproto.RequestStateDiskKeyResponse, error) {
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if err := a.core.RequireState(state.ActivatingNodes); err != nil {
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return nil, status.Errorf(codes.FailedPrecondition, "%v", err)
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}
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key, err := a.core.GetDataKey(ctx, in.DiskUuid, config.RNGLengthDefault)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "unable to load key: %v", err)
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}
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peer, err := a.peerFromContext(ctx)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "%v", err)
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}
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conn, err := a.dial(ctx, peer)
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if err != nil {
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return nil, status.Errorf(codes.Internal, "%v", err)
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}
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defer conn.Close()
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client := keyproto.NewAPIClient(conn)
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if _, err := client.PushStateDiskKey(ctx, &keyproto.PushStateDiskKeyRequest{StateDiskKey: key}); err != nil {
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return nil, status.Errorf(codes.Internal, "pushing key to peer %q: %v", peer, err)
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}
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return &pubproto.RequestStateDiskKeyResponse{}, nil
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}
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func (a *API) activateNodes(logToCLI logFunc, nodePublicIPs []string) error {
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_, peers, err := a.core.GetPeers(0)
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if err != nil {
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return err
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}
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// we need to add at least all coordinators to the peer for HA
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initialPeers := peer.ToPubProto(peers)
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ownerID, clusterID, err := a.core.GetIDs(nil)
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if err != nil {
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return err
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}
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// Activate all nodes.
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for num, nodePublicIP := range nodePublicIPs {
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logToCLI("activating node %3d out of %3d nodes ...", num+1, len(nodePublicIPs))
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nodeVPNIP, err := a.core.GetNextNodeIP()
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if err != nil {
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a.logger.Error("generation of vpn ips failed", zap.Error(err))
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return err
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}
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nodeVpnPubKey, err := a.activateNode(nodePublicIP, nodeVPNIP, initialPeers, ownerID, clusterID)
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if err != nil {
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return err
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}
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peer := peer.Peer{
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PublicIP: nodePublicIP,
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VPNIP: nodeVPNIP,
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VPNPubKey: nodeVpnPubKey,
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Role: role.Node,
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}
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if err := a.core.AddPeer(peer); err != nil {
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return err
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}
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// This can be omitted if we
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// 1. Use a gRPC HA balancer mechanism, which picks one active coordinator connection
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// (nodeUpdate loop causes problems, even if we specify the IP in the joinCluster RPC)
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if err := a.updateCoordinator(); err != nil {
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return err
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}
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if err := a.joinCluster(nodePublicIP); err != nil {
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return err
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}
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}
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// Manually trigger an update operation on all peers.
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// This may be expendable in the future, depending on whether it's acceptable that it takes
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// some seconds until the nodes get all peer data via their regular update requests.
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_, peers, err = a.core.GetPeers(0)
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if err != nil {
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return err
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}
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vpnIP, err := a.core.GetVPNIP()
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if err != nil {
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return err
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}
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for _, p := range peers {
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if p.Role == role.Node {
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if err := a.triggerNodeUpdate(p.PublicIP); err != nil {
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a.logger.Error("TriggerNodeUpdate failed", zap.Error(err))
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}
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}
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if p.Role == role.Coordinator && p.VPNIP != vpnIP {
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a.logger.Info("update coordinator", zap.String("coordinator vpnIP", p.VPNIP))
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if err := a.triggerCoordinatorUpdate(context.TODO(), p.PublicIP); err != nil {
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// no reason to panic here, we can recover
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a.logger.Error("triggerCoordinatorUpdate failed", zap.Error(err), zap.String("endpoint", p.PublicIP), zap.String("vpnip", p.VPNIP))
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}
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}
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}
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return nil
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}
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func (a *API) activateNode(nodePublicIP string, nodeVPNIP string, initialPeers []*pubproto.Peer, ownerID, clusterID []byte) ([]byte, error) {
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ctx, cancel := context.WithTimeout(context.Background(), deadlineDuration)
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defer cancel()
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conn, err := a.dial(ctx, net.JoinHostPort(nodePublicIP, endpointAVPNPort))
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if err != nil {
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return nil, err
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}
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defer conn.Close()
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client := pubproto.NewAPIClient(conn)
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stream, err := client.ActivateAsNode(ctx)
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if err != nil {
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a.logger.Error("connecting to node for activation failed", zap.Error(err))
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return nil, err
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}
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/*
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coordinator -> initial request -> node
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*/
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if err := stream.Send(&pubproto.ActivateAsNodeRequest{
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Request: &pubproto.ActivateAsNodeRequest_InitialRequest{
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InitialRequest: &pubproto.ActivateAsNodeInitialRequest{
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NodeVpnIp: nodeVPNIP,
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Peers: initialPeers,
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OwnerId: ownerID,
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ClusterId: clusterID,
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},
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},
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}); err != nil {
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a.logger.Error("sending initial message to node for activation failed", zap.Error(err))
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return nil, err
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}
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/*
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coordinator <- state disk uuid <- node
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*/
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// wait for message containing the nodes disk UUID to send back the permanent encryption key
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message, err := stream.Recv()
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if err != nil {
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a.logger.Error("expected disk UUID message but no message received", zap.Error(err))
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return nil, err
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}
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diskUUID, ok := message.GetResponse().(*pubproto.ActivateAsNodeResponse_StateDiskUuid)
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if !ok {
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a.logger.Error("expected disk UUID message but got different message")
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return nil, errors.New("expected state disk UUID but got different message type")
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}
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diskKey, err := a.core.GetDataKey(ctx, diskUUID.StateDiskUuid, 32)
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if err != nil {
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a.logger.Error("failed to derive node's disk key")
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return nil, err
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}
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/*
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coordinator -> state disk key -> node
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*/
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// send back state disk encryption key
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if err := stream.Send(&pubproto.ActivateAsNodeRequest{
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Request: &pubproto.ActivateAsNodeRequest_StateDiskKey{
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StateDiskKey: diskKey,
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},
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}); err != nil {
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a.logger.Error("sending state disk key to node on activation failed", zap.Error(err))
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return nil, err
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}
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/*
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coordinator <- VPN public key <- node
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*/
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// wait for message containing the node VPN pubkey
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message, err = stream.Recv()
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if err != nil {
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a.logger.Error("expected node VPN pubkey but no message received", zap.Error(err))
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return nil, err
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}
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vpnPubKey, ok := message.GetResponse().(*pubproto.ActivateAsNodeResponse_NodeVpnPubKey)
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if !ok {
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a.logger.Error("expected node VPN pubkey but got different message")
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return nil, errors.New("expected node VPN pub key but got different message type")
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}
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return vpnPubKey.NodeVpnPubKey, nil
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}
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// assemblePeerStruct combines all information of this peer into a peer struct.
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func (a *API) assemblePeerStruct(vpnIP string, _ role.Role) (peer.Peer, error) {
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vpnPubKey, err := a.core.GetVPNPubKey()
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if err != nil {
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a.logger.Error("could not get key", zap.Error(err))
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return peer.Peer{}, err
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}
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publicIP, err := a.getPublicIPAddr()
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if err != nil {
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a.logger.Error("could not get public IP", zap.Error(err))
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return peer.Peer{}, err
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}
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return peer.Peer{
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PublicIP: publicIP,
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VPNIP: vpnIP,
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VPNPubKey: vpnPubKey,
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Role: role.Coordinator,
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}, err
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}
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func (a *API) newLogToCLIFunc(send func(string) error) logFunc {
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return func(format string, v ...interface{}) {
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if err := send(fmt.Sprintf(format, v...)); err != nil {
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a.logger.Error("logging to CLI failed", zap.Error(err))
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}
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}
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}
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func (a *API) joinCluster(nodePublicIP string) error {
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ctx, cancel := context.WithTimeout(context.Background(), deadlineDuration)
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defer cancel()
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vpnIP, err := a.core.GetVPNIP()
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if err != nil {
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return err
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}
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// We don't verify the peer certificate here, since JoinCluster triggers a connection over VPN
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// The target of the rpc needs to already be part of the VPN to process the request, meaning it is trusted
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conn, err := a.dialNoVerify(ctx, net.JoinHostPort(nodePublicIP, endpointAVPNPort))
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if err != nil {
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return err
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}
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defer conn.Close()
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client := pubproto.NewAPIClient(conn)
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_, err = client.JoinCluster(ctx, &pubproto.JoinClusterRequest{CoordinatorVpnIp: vpnIP})
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return err
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}
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func (a *API) updateCoordinator() error {
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_, peers, err := a.core.GetPeers(0)
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if err != nil {
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return err
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}
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vpnIP, err := a.core.GetVPNIP()
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if err != nil {
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return err
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}
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for _, p := range peers {
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if p.Role == role.Coordinator && p.VPNIP != vpnIP {
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a.logger.Info("update coordinator", zap.String("coordinator vpnIP", p.VPNIP))
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if err := a.triggerCoordinatorUpdate(context.TODO(), p.PublicIP); err != nil {
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a.logger.Error("triggerCoordinatorUpdate failed", zap.Error(err), zap.String("endpoint", p.PublicIP), zap.String("vpnip", p.VPNIP))
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}
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}
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}
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return nil
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}
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func (a *API) triggerNodeUpdate(nodePublicIP string) error {
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ctx, cancel := context.WithTimeout(context.Background(), deadlineDuration)
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defer cancel()
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// We don't verify the peer certificate here, since TriggerNodeUpdate triggers a connection over VPN
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// The target of the rpc needs to already be part of the VPN to process the request, meaning it is trusted
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conn, err := a.dialNoVerify(ctx, net.JoinHostPort(nodePublicIP, endpointAVPNPort))
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if err != nil {
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return err
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}
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defer conn.Close()
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client := pubproto.NewAPIClient(conn)
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_, err = client.TriggerNodeUpdate(ctx, &pubproto.TriggerNodeUpdateRequest{})
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return err
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}
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type logFunc func(format string, v ...interface{})
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