frostfs-node/cmd/neofs-node/grpc.go

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package main
import (
"crypto/tls"
"errors"
"fmt"
"net"
"time"
grpcconfig "github.com/nspcc-dev/neofs-node/cmd/neofs-node/config/grpc"
"github.com/nspcc-dev/neofs-node/pkg/util/logger"
"go.uber.org/zap"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
func initGRPC(c *cfg) {
var successCount int
grpcconfig.IterateEndpoints(c.appCfg, func(sc *grpcconfig.Config) {
serverOpts := []grpc.ServerOption{
grpc.MaxSendMsgSize(maxMsgSize),
}
tlsCfg := sc.TLS()
if tlsCfg != nil {
cert, err := tls.LoadX509KeyPair(tlsCfg.CertificateFile(), tlsCfg.KeyFile())
if err != nil {
c.log.Error("could not read certificate from file", zap.Error(err))
return
}
var cipherSuites []uint16
if !tlsCfg.UseInsecureCrypto() {
// This more or less follows the list in https://wiki.mozilla.org/Security/Server_Side_TLS
// excluding:
// 1. TLS 1.3 suites need not be specified here.
// 2. Suites that use DH key exchange are not implemented by stdlib.
cipherSuites = []uint16{
tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
}
}
creds := credentials.NewTLS(&tls.Config{
MinVersion: tls.VersionTLS12,
CipherSuites: cipherSuites,
Certificates: []tls.Certificate{cert},
})
serverOpts = append(serverOpts, grpc.Creds(creds))
}
lis, err := net.Listen("tcp", sc.Endpoint())
if err != nil {
c.log.Error("can't listen gRPC endpoint", zap.Error(err))
return
}
c.cfgGRPC.listeners = append(c.cfgGRPC.listeners, lis)
srv := grpc.NewServer(serverOpts...)
c.onShutdown(func() {
stopGRPC("NeoFS Public API", srv, c.log)
})
c.cfgGRPC.servers = append(c.cfgGRPC.servers, srv)
successCount++
})
if successCount == 0 {
fatalOnErr(errors.New("could not listen to any gRPC endpoints"))
}
}
func serveGRPC(c *cfg) {
for i := range c.cfgGRPC.servers {
c.wg.Add(1)
srv := c.cfgGRPC.servers[i]
lis := c.cfgGRPC.listeners[i]
go func() {
defer func() {
c.log.Info("stop listening gRPC endpoint",
zap.String("endpoint", lis.Addr().String()),
)
c.wg.Done()
}()
c.log.Info("start listening gRPC endpoint",
zap.String("endpoint", lis.Addr().String()),
)
if err := srv.Serve(lis); err != nil {
fmt.Println("gRPC server error", err)
}
}()
}
}
func stopGRPC(name string, s *grpc.Server, l *logger.Logger) {
l = &logger.Logger{Logger: l.With(zap.String("name", name))}
l.Info("stopping gRPC server...")
// GracefulStop() may freeze forever, see #1270
done := make(chan struct{})
go func() {
s.GracefulStop()
close(done)
}()
select {
case <-done:
case <-time.After(1 * time.Minute):
l.Info("gRPC cannot shutdown gracefully, forcing stop")
s.Stop()
}
l.Info("gRPC server stopped successfully")
}