mirror of https://github.com/grafana/grafana.git
114 lines
3.0 KiB
Go
114 lines
3.0 KiB
Go
package grpcserver
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import (
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"context"
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"fmt"
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"net"
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"github.com/grafana/grafana-plugin-sdk-go/backend"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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grpcAuth "github.com/grpc-ecosystem/go-grpc-middleware/auth"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials"
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"github.com/grafana/grafana/pkg/infra/log"
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"github.com/grafana/grafana/pkg/infra/tracing"
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"github.com/grafana/grafana/pkg/registry"
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"github.com/grafana/grafana/pkg/services/featuremgmt"
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"github.com/grafana/grafana/pkg/services/grpcserver/interceptors"
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"github.com/grafana/grafana/pkg/setting"
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)
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type Provider interface {
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registry.BackgroundService
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GetServer() *grpc.Server
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GetAddress() string
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}
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type GPRCServerService struct {
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cfg *setting.Cfg
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logger log.Logger
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server *grpc.Server
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address string
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}
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func ProvideService(cfg *setting.Cfg, authenticator interceptors.Authenticator, tracer tracing.Tracer) (Provider, error) {
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s := &GPRCServerService{
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cfg: cfg,
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logger: log.New("grpc-server"),
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}
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var opts []grpc.ServerOption
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// Default auth is admin token check, but this can be overridden by
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// services which implement ServiceAuthFuncOverride interface.
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// See https://github.com/grpc-ecosystem/go-grpc-middleware/blob/master/auth/auth.go#L30.
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opts = append(opts, []grpc.ServerOption{
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grpc.UnaryInterceptor(
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grpc_middleware.ChainUnaryServer(
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grpcAuth.UnaryServerInterceptor(authenticator.Authenticate),
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interceptors.TracingUnaryInterceptor(tracer),
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),
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),
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grpc.StreamInterceptor(
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grpc_middleware.ChainStreamServer(
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interceptors.TracingStreamInterceptor(tracer),
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grpcAuth.StreamServerInterceptor(authenticator.Authenticate),
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),
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),
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}...)
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if s.cfg.GRPCServerTLSConfig != nil {
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opts = append(opts, grpc.Creds(credentials.NewTLS(cfg.GRPCServerTLSConfig)))
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}
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s.server = grpc.NewServer(opts...)
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return s, nil
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}
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func (s *GPRCServerService) Run(ctx context.Context) error {
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s.logger.Info("Running GRPC server", "address", s.cfg.GRPCServerAddress, "network", s.cfg.GRPCServerNetwork, "tls", s.cfg.GRPCServerTLSConfig != nil)
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listener, err := net.Listen(s.cfg.GRPCServerNetwork, s.cfg.GRPCServerAddress)
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if err != nil {
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return fmt.Errorf("GRPC server: failed to listen: %w", err)
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}
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s.address = listener.Addr().String()
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serveErr := make(chan error, 1)
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go func() {
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s.logger.Info("GRPC server: starting")
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err := s.server.Serve(listener)
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if err != nil {
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backend.Logger.Error("GRPC server: failed to serve", "err", err)
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serveErr <- err
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}
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}()
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select {
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case err := <-serveErr:
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backend.Logger.Error("GRPC server: failed to serve", "err", err)
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return err
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case <-ctx.Done():
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}
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s.logger.Warn("GRPC server: shutting down")
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s.server.Stop()
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return ctx.Err()
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}
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func (s *GPRCServerService) IsDisabled() bool {
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if s.cfg == nil {
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return true
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}
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return !s.cfg.IsFeatureToggleEnabled(featuremgmt.FlagGrpcServer)
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}
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func (s *GPRCServerService) GetServer() *grpc.Server {
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return s.server
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}
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func (s *GPRCServerService) GetAddress() string {
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return s.address
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}
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