sandbox: merge address and protocol to one url

Signed-off-by: Abel Feng <fshb1988@gmail.com>

plugins/sandbox/controller.go

@@ -188,12 +188,11 @@ func (c *controllerLocal) Start(ctx context.Context, sandboxID string) (sandbox.
 		c.cleanupShim(ctx, sandboxID, svc)
 		return sandbox.ControllerInstance{}, fmt.Errorf("failed to start sandbox %s: %w", sandboxID, errdefs.FromGRPC(err))
 	}
-	address, protocol, version := shim.Endpoint()
+	address, version := shim.Endpoint()
 	return sandbox.ControllerInstance{
 		SandboxID: sandboxID,
 		Pid:       resp.GetPid(),
 		Address:   address,
-		Protocol:  protocol,
 		Version:   uint32(version),
 		CreatedAt: resp.GetCreatedAt().AsTime(),
 	}, nil
@@ -309,7 +308,7 @@ func (c *controllerLocal) Status(ctx context.Context, sandboxID string, verbose
 	if err != nil {
 		return sandbox.ControllerStatus{}, fmt.Errorf("unable to find sandbox %q", sandboxID)
 	}
-	address, protocol, version := shim.Endpoint()
+	address, version := shim.Endpoint()
 
 	return sandbox.ControllerStatus{
 		SandboxID: resp.GetSandboxID(),
@@ -320,7 +319,6 @@ func (c *controllerLocal) Status(ctx context.Context, sandboxID string, verbose
 		ExitedAt:  resp.GetExitedAt().AsTime(),
 		Extra:     resp.GetExtra(),
 		Address:   address,
-		Protocol:  protocol,
 		Version:   uint32(version),
 	}, nil
 }

plugins/services/tasks/local.go

@@ -157,10 +157,9 @@ func (l *local) Create(ctx context.Context, r *api.CreateTaskRequest, _ ...grpc.
 	}
 
 	var (
-		checkpointPath  string
-		taskAPIAddress  string
-		taskAPIProtocol string
-		taskAPIVersion  uint32
+		checkpointPath string
+		taskAPIAddress string
+		taskAPIVersion uint32
 	)
 
 	if r.Options != nil {
@@ -170,7 +169,6 @@ func (l *local) Create(ctx context.Context, r *api.CreateTaskRequest, _ ...grpc.
 		}
 		checkpointPath = taskOptions.CriuImagePath
 		taskAPIAddress = taskOptions.TaskApiAddress
-		taskAPIProtocol = taskOptions.TaskApiProtocol
 		taskAPIVersion = taskOptions.TaskApiVersion
 	}
 
@@ -212,7 +210,6 @@ func (l *local) Create(ctx context.Context, r *api.CreateTaskRequest, _ ...grpc.
 		TaskOptions:    r.Options,
 		SandboxID:      container.SandboxID,
 		Address:        taskAPIAddress,
-		Protocol:       taskAPIProtocol,
 		Version:        taskAPIVersion,
 	}
 	if r.RuntimePath != "" {