refactor(driver): use middleware interceptors

go.mod

@@ -5,11 +5,12 @@ go 1.12
 require (
 	github.com/container-storage-interface/spec v1.2.0
 	github.com/enix/dothill-api-go v1.5.0
+	github.com/grpc-ecosystem/go-grpc-middleware v1.2.2
 	github.com/kubernetes-csi/csi-lib-iscsi v0.0.0-20200118015005-959f12c91ca8
 	github.com/kubernetes-csi/csi-test v0.0.0-20191016154743-6931aedb3df0
 	github.com/pkg/errors v0.9.1
 	golang.org/x/sync v0.0.0-20190423024810-112230192c58
-	google.golang.org/grpc v1.26.0
+	google.golang.org/grpc v1.29.1
 	k8s.io/klog v1.0.0
 )
 

go.sum

@@ -1,23 +1,40 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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 github.com/27149chen/csi-lib-iscsi v0.0.0-20200113115836-da1b94e79a4c h1:wqhbsgK+Vb0OJZCcuEIMzolYOFS4iMFcechxTCVcJxY=
 github.com/27149chen/csi-lib-iscsi v0.0.0-20200113115836-da1b94e79a4c/go.mod h1:IDEfmJabVL88aINfRD/WNlI+/BuWit4KkbLaMYKt+fc=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
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+github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas=
+github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
+github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
@@ -26,14 +43,21 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
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@@ -47,22 +71,38 @@ github.com/onsi/ginkgo v1.8.0 h1:VkHVNpR4iVnU8XQR6DBm8BqYjN7CRzw+xKUbVVbbW9w=
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@@ -71,6 +111,10 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJV
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@@ -83,24 +127,43 @@ golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5h
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pkg/common/driver.go

@@ -7,11 +7,11 @@ import (
 	"strings"
 	"syscall"
 	"context"
-	"sync"
 
 	"github.com/container-storage-interface/spec/lib/go/csi"
 	"google.golang.org/grpc"
 	"k8s.io/klog"
+	"github.com/grpc-ecosystem/go-grpc-middleware"
 )
 
 // PluginName is the public name to be used in storage class etc.
@@ -41,8 +41,7 @@ type Driver struct {
 }
 
 type DriverImpl interface {
-	NewServerInterceptor() grpc.UnaryServerInterceptor
-	GetMutex(fullMethod string) *sync.Mutex
+	NewServerInterceptors(logRoutineServerInterceptor grpc.UnaryServerInterceptor) *[]grpc.UnaryServerInterceptor
 	ShouldLogRoutine(fullMethod string) bool
 }
 
@@ -62,25 +61,21 @@ type WithVolumeCaps interface {
 func NewDriver(impl DriverImpl) *Driver {
 	return &Driver{
 		impl:   impl,
-		server: grpc.NewServer(grpc.UnaryInterceptor(newServerInterceptor(impl))),
+		server: grpc.NewServer(
+			grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
+				*impl.NewServerInterceptors(newLogRoutineServerInterceptor(impl))...
+			)),
+		),
 	}
 }
 
-func newServerInterceptor(impl DriverImpl) grpc.UnaryServerInterceptor {
-	serverInterceptor := impl.NewServerInterceptor()
+func newLogRoutineServerInterceptor(impl DriverImpl) grpc.UnaryServerInterceptor {
 	return func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-		if mutex := impl.GetMutex(info.FullMethod); mutex != nil {
-			mutex.Lock()
-			defer mutex.Unlock()
-		}
 		if impl.ShouldLogRoutine(info.FullMethod) {
 			klog.Infof("=== [ROUTINE START] %s ===", info.FullMethod)
 			defer klog.Infof("=== [ROUTINE END] %s ===", info.FullMethod)
 		}
-		if serverInterceptor == nil {
-			return handler(ctx, req)
-		}
-		return serverInterceptor(ctx, req, info, handler)
+		return handler(ctx, req)
 	}
 }