Change client protocols from BSON RPC to gRPC.

This commit changes the following protocols:

- binlog_player_protocol
- vtctl_client_protocol

The only BSON protocol left is vtgate pending the implementation of the
gRPC vtgate client.

Note that we originally added this change in
https://github.com/youtube/vitess/pull/1230

However, we reverted it because the Kubernetes tutorial and images were
out of sync. Therefore, this commit technically is the revert of the
revert.

Revert "Revert "Change protocol defaults to grpc.""

This reverts commit 5e5f40a04e.

examples/kubernetes/vtctld-controller-template.yaml

@@ -40,7 +40,7 @@ spec:
               -log_dir $VTDATAROOT/tmp
               -alsologtostderr
               -port 15000
-              -service_map 'bsonrpc-vt-vtctl'
+              -service_map 'grpc-vtctl'
               -topo_implementation etcd
               -tablet_protocol grpc
               -tablet_manager_protocol grpc

examples/local/vtctld-up.sh

@@ -22,7 +22,7 @@ $VTROOT/bin/vtctld -debug -templates $VTTOP/go/cmd/vtctld/templates \
   -web_dir $VTTOP/web/vtctld \
   -tablet_protocol grpc \
   -tablet_manager_protocol grpc \
-  -service_map 'bsonrpc-vt-vtctl' \
+  -service_map 'grpc-vtctl' \
   -backup_storage_implementation file \
   -file_backup_storage_root $VTDATAROOT/backups \
   -log_dir $VTDATAROOT/tmp -port $port > $VTDATAROOT/tmp/vtctld.out 2>&1 &

go/vt/binlog/binlogplayer/client.go

@@ -22,7 +22,7 @@ import (
 This file contains the API and registration mechanism for binlog player client.
 */
 
-var binlogPlayerProtocol = flag.String("binlog_player_protocol", "gorpc", "the protocol to download binlogs from a vttablet")
+var binlogPlayerProtocol = flag.String("binlog_player_protocol", "grpc", "the protocol to download binlogs from a vttablet")
 var binlogPlayerConnTimeout = flag.Duration("binlog_player_conn_timeout", 5*time.Second, "binlog player connection timeout")
 
 // ErrFunc is a return value for streaming events

go/vt/vtctl/vtctlclient/interface.go

@@ -15,8 +15,8 @@ import (
 	"golang.org/x/net/context"
 )
 
-// VtctlClientProtocol specifices which RPC client implementation should be used.
-var VtctlClientProtocol = flag.String("vtctl_client_protocol", "gorpc", "the protocol to use to talk to the vtctl server")
+// vtctlClientProtocol specifices which RPC client implementation should be used.
+var vtctlClientProtocol = flag.String("vtctl_client_protocol", "grpc", "the protocol to use to talk to the vtctl server")
 
 // ErrFunc is returned by streaming queries to get the error
 type ErrFunc func() error
@@ -58,9 +58,9 @@ func UnregisterFactoryForTest(name string) {
 
 // New allows a user of the client library to get its implementation.
 func New(addr string, connectTimeout time.Duration) (VtctlClient, error) {
-	factory, ok := factories[*VtctlClientProtocol]
+	factory, ok := factories[*vtctlClientProtocol]
 	if !ok {
-		return nil, fmt.Errorf("unknown vtctl client protocol: %v", *VtctlClientProtocol)
+		return nil, fmt.Errorf("unknown vtctl client protocol: %v", *vtctlClientProtocol)
 	}
 	return factory(addr, connectTimeout)
 }

go/vt/wrangler/testlib/vtctl_pipe.go

@@ -5,6 +5,7 @@
 package testlib
 
 import (
+	"flag"
 	"fmt"
 	"net"
 	"testing"
@@ -24,7 +25,7 @@ import (
 
 func init() {
 	// make sure we use the right protocol
-	*vtctlclient.VtctlClientProtocol = "grpc"
+	flag.Set("vtctl_client_protocol", "grpc")
 }
 
 // VtctlPipe is a vtctl server based on a topo server, and a client that

test/protocols_flavor.py

@@ -12,7 +12,7 @@ class ProtocolsFlavor(object):
   """Base class for protocols flavor."""
 
   def binlog_player_protocol(self):
-    """Tdthe binlog player protocol between vttablets, in go."""
+    """The binlog player protocol between vttablets, in go."""
     raise NotImplementedError('Not implemented in the base class')
 
   def binlog_player_python_protocol(self):