125 lines
3 KiB
Go
125 lines
3 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Modifications copyright 2020 PayPal.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package katbox
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import (
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"fmt"
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"net"
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"os"
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"strings"
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"sync"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/golang/glog"
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"github.com/kubernetes-csi/csi-lib-utils/protosanitizer"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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func NewNonBlockingGRPCServer() *nonBlockingGRPCServer {
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return &nonBlockingGRPCServer{}
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}
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// NonBlocking server
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type nonBlockingGRPCServer struct {
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wg sync.WaitGroup
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server *grpc.Server
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}
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func (s *nonBlockingGRPCServer) Start(endpoint string, ids csi.IdentityServer, ns csi.NodeServer) {
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s.wg.Add(1)
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go s.serve(endpoint, ids, ns)
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return
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}
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func (s *nonBlockingGRPCServer) Wait() {
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s.wg.Wait()
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}
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func (s *nonBlockingGRPCServer) Stop() {
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s.server.GracefulStop()
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}
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func (s *nonBlockingGRPCServer) ForceStop() {
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s.server.Stop()
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}
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func (s *nonBlockingGRPCServer) serve(endpoint string, ids csi.IdentityServer, ns csi.NodeServer) {
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proto, addr, err := parseEndpoint(endpoint)
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if err != nil {
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glog.Fatal(err.Error())
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}
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if proto == "unix" {
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addr = "/" + addr
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if err := os.Remove(addr); err != nil && !os.IsNotExist(err) { //nolint: vetshadow
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glog.Fatalf("Failed to remove %s, error: %s", addr, err.Error())
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}
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}
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listener, err := net.Listen(proto, addr)
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if err != nil {
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glog.Fatalf("Failed to listen: %v", err)
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}
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opts := []grpc.ServerOption{
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grpc.UnaryInterceptor(logGRPC),
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}
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server := grpc.NewServer(opts...)
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s.server = server
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if ids != nil {
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csi.RegisterIdentityServer(server, ids)
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}
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if ns != nil {
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csi.RegisterNodeServer(server, ns)
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}
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glog.Infof("Listening for connections on address: %#v", listener.Addr())
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server.Serve(listener)
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}
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func parseEndpoint(ep string) (string, string, error) {
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if strings.HasPrefix(strings.ToLower(ep), "unix://") || strings.HasPrefix(strings.ToLower(ep), "tcp://") {
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s := strings.SplitN(ep, "://", 2)
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if s[1] != "" {
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return s[0], s[1], nil
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}
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}
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return "", "", fmt.Errorf("invalid endpoint: %v", ep)
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}
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func logGRPC(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
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glog.V(5).Infof("GRPC call: %s", info.FullMethod)
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glog.V(5).Infof("GRPC request: %+v", protosanitizer.StripSecrets(req))
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resp, err := handler(ctx, req)
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if err != nil {
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glog.Errorf("GRPC error: %v", err)
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} else {
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glog.V(5).Infof("GRPC response: %+v", protosanitizer.StripSecrets(resp))
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}
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return resp, err
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}
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