forked from hashicorp/vault
/
grpc_backend_server.go
145 lines (118 loc) · 3.95 KB
/
grpc_backend_server.go
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package plugin
import (
"context"
"errors"
log "github.com/hashicorp/go-hclog"
plugin "github.com/hashicorp/go-plugin"
"github.com/hashicorp/vault/helper/pluginutil"
"github.com/hashicorp/vault/logical"
"github.com/hashicorp/vault/logical/plugin/pb"
"google.golang.org/grpc"
)
var ErrServerInMetadataMode = errors.New("plugin server can not perform action while in metadata mode")
type backendGRPCPluginServer struct {
broker *plugin.GRPCBroker
backend logical.Backend
factory logical.Factory
brokeredClient *grpc.ClientConn
logger log.Logger
}
// Setup dials into the plugin's broker to get a shimmed storage, logger, and
// system view of the backend. This method also instantiates the underlying
// backend through its factory func for the server side of the plugin.
func (b *backendGRPCPluginServer) Setup(ctx context.Context, args *pb.SetupArgs) (*pb.SetupReply, error) {
// Dial for storage
brokeredClient, err := b.broker.Dial(args.BrokerID)
if err != nil {
return &pb.SetupReply{}, err
}
b.brokeredClient = brokeredClient
storage := newGRPCStorageClient(brokeredClient)
sysView := newGRPCSystemView(brokeredClient)
config := &logical.BackendConfig{
StorageView: storage,
Logger: b.logger,
System: sysView,
Config: args.Config,
BackendUUID: args.BackendUUID,
}
// Call the underlying backend factory after shims have been created
// to set b.backend
backend, err := b.factory(ctx, config)
if err != nil {
return &pb.SetupReply{
Err: pb.ErrToString(err),
}, nil
}
b.backend = backend
return &pb.SetupReply{}, nil
}
func (b *backendGRPCPluginServer) HandleRequest(ctx context.Context, args *pb.HandleRequestArgs) (*pb.HandleRequestReply, error) {
if pluginutil.InMetadataMode() {
return &pb.HandleRequestReply{}, ErrServerInMetadataMode
}
logicalReq, err := pb.ProtoRequestToLogicalRequest(args.Request)
if err != nil {
return &pb.HandleRequestReply{}, err
}
logicalReq.Storage = newGRPCStorageClient(b.brokeredClient)
resp, respErr := b.backend.HandleRequest(ctx, logicalReq)
pbResp, err := pb.LogicalResponseToProtoResponse(resp)
if err != nil {
return &pb.HandleRequestReply{}, err
}
return &pb.HandleRequestReply{
Response: pbResp,
Err: pb.ErrToProtoErr(respErr),
}, nil
}
func (b *backendGRPCPluginServer) SpecialPaths(ctx context.Context, args *pb.Empty) (*pb.SpecialPathsReply, error) {
paths := b.backend.SpecialPaths()
if paths == nil {
return &pb.SpecialPathsReply{
Paths: nil,
}, nil
}
return &pb.SpecialPathsReply{
Paths: &pb.Paths{
Root: paths.Root,
Unauthenticated: paths.Unauthenticated,
LocalStorage: paths.LocalStorage,
SealWrapStorage: paths.SealWrapStorage,
},
}, nil
}
func (b *backendGRPCPluginServer) HandleExistenceCheck(ctx context.Context, args *pb.HandleExistenceCheckArgs) (*pb.HandleExistenceCheckReply, error) {
if pluginutil.InMetadataMode() {
return &pb.HandleExistenceCheckReply{}, ErrServerInMetadataMode
}
logicalReq, err := pb.ProtoRequestToLogicalRequest(args.Request)
if err != nil {
return &pb.HandleExistenceCheckReply{}, err
}
logicalReq.Storage = newGRPCStorageClient(b.brokeredClient)
checkFound, exists, err := b.backend.HandleExistenceCheck(ctx, logicalReq)
return &pb.HandleExistenceCheckReply{
CheckFound: checkFound,
Exists: exists,
Err: pb.ErrToProtoErr(err),
}, nil
}
func (b *backendGRPCPluginServer) Cleanup(ctx context.Context, _ *pb.Empty) (*pb.Empty, error) {
b.backend.Cleanup(ctx)
// Close rpc clients
b.brokeredClient.Close()
return &pb.Empty{}, nil
}
func (b *backendGRPCPluginServer) InvalidateKey(ctx context.Context, args *pb.InvalidateKeyArgs) (*pb.Empty, error) {
if pluginutil.InMetadataMode() {
return &pb.Empty{}, ErrServerInMetadataMode
}
b.backend.InvalidateKey(ctx, args.Key)
return &pb.Empty{}, nil
}
func (b *backendGRPCPluginServer) Type(ctx context.Context, _ *pb.Empty) (*pb.TypeReply, error) {
return &pb.TypeReply{
Type: uint32(b.backend.Type()),
}, nil
}