From bc26c47abfb17358501a0fdd7a6c62e63ed5c77c Mon Sep 17 00:00:00 2001
From: Gabriel Parreiras <gabriel.parreiras@shopify.com>
Date: Thu, 14 Nov 2024 14:59:57 +0000
Subject: [PATCH] Add support for receiving grpc_bind_adress on vttestserver

Signed-off-by: Gabriel Parreiras <gabriel.parreiras@shopify.com>
---
 go/vt/servenv/grpc_server.go  |  5 ++++
 go/vt/vttest/local_cluster.go |  1 +
 go/vt/vttest/vtprocess.go     | 50 ++++++++++++++++++++++-------------
 3 files changed, 37 insertions(+), 19 deletions(-)

diff --git a/go/vt/servenv/grpc_server.go b/go/vt/servenv/grpc_server.go
index 96fe3c25ea9..8d30ee6d253 100644
--- a/go/vt/servenv/grpc_server.go
+++ b/go/vt/servenv/grpc_server.go
@@ -169,6 +169,11 @@ func GRPCPort() int {
 	return gRPCPort
 }
 
+// GRPCPort returns the value of the `--grpc_bind_address` flag.
+func GRPCBindAddress() string {
+	return gRPCBindAddress
+}
+
 // isGRPCEnabled returns true if gRPC server is set
 func isGRPCEnabled() bool {
 	if gRPCPort != 0 {
diff --git a/go/vt/vttest/local_cluster.go b/go/vt/vttest/local_cluster.go
index 576a78bb761..fa7e40feb12 100644
--- a/go/vt/vttest/local_cluster.go
+++ b/go/vt/vttest/local_cluster.go
@@ -660,6 +660,7 @@ func (db *LocalCluster) JSONConfig() any {
 	config := map[string]any{
 		"bind_address":       db.vt.BindAddress,
 		"port":               db.vt.Port,
+		"grpc_bind_address":  db.vt.BindAddressGprc,
 		"socket":             db.mysql.UnixSocket(),
 		"vtcombo_mysql_port": db.Env.PortForProtocol("vtcombo_mysql_port", ""),
 		"mysql":              db.Env.PortForProtocol("mysql", ""),
diff --git a/go/vt/vttest/vtprocess.go b/go/vt/vttest/vtprocess.go
index 3f34994bb75..6371811a60e 100644
--- a/go/vt/vttest/vtprocess.go
+++ b/go/vt/vttest/vtprocess.go
@@ -44,16 +44,17 @@ type HealthChecker func(addr string) bool
 // It can be spawned manually or through one of the available
 // helper methods.
 type VtProcess struct {
-	Name         string
-	Directory    string
-	LogDirectory string
-	Binary       string
-	ExtraArgs    []string
-	Env          []string
-	BindAddress  string
-	Port         int
-	PortGrpc     int
-	HealthCheck  HealthChecker
+	Name            string
+	Directory       string
+	LogDirectory    string
+	Binary          string
+	ExtraArgs       []string
+	Env             []string
+	BindAddress     string
+	BindAddressGprc string
+	Port            int
+	PortGrpc        int
+	HealthCheck     HealthChecker
 
 	proc *exec.Cmd
 	exit chan error
@@ -139,6 +140,11 @@ func (vtp *VtProcess) WaitStart() (err error) {
 		vtp.proc.Args = append(vtp.proc.Args, fmt.Sprintf("%d", vtp.PortGrpc))
 	}
 
+	if vtp.BindAddressGprc != "" {
+		vtp.proc.Args = append(vtp.proc.Args, "--grpc_bind_address")
+		vtp.proc.Args = append(vtp.proc.Args, vtp.BindAddressGprc)
+	}
+
 	vtp.proc.Args = append(vtp.proc.Args, vtp.ExtraArgs...)
 	vtp.proc.Env = append(vtp.proc.Env, os.Environ()...)
 	vtp.proc.Env = append(vtp.proc.Env, vtp.Env...)
@@ -199,16 +205,22 @@ func VtcomboProcess(environment Environment, args *Config, mysql MySQLManager) (
 	if args.VtComboBindAddress != "" {
 		vtcomboBindAddress = args.VtComboBindAddress
 	}
+	grpcBindAddress := "127.0.0.1"
+	if servenv.GRPCBindAddress() != "" {
+		grpcBindAddress = servenv.GRPCBindAddress()
+	}
+
 	vt := &VtProcess{
-		Name:         "vtcombo",
-		Directory:    environment.Directory(),
-		LogDirectory: environment.LogDirectory(),
-		Binary:       environment.BinaryPath("vtcombo"),
-		BindAddress:  vtcomboBindAddress,
-		Port:         environment.PortForProtocol("vtcombo", ""),
-		PortGrpc:     environment.PortForProtocol("vtcombo", "grpc"),
-		HealthCheck:  environment.ProcessHealthCheck("vtcombo"),
-		Env:          environment.EnvVars(),
+		Name:            "vtcombo",
+		Directory:       environment.Directory(),
+		LogDirectory:    environment.LogDirectory(),
+		Binary:          environment.BinaryPath("vtcombo"),
+		BindAddress:     vtcomboBindAddress,
+		BindAddressGprc: grpcBindAddress,
+		Port:            environment.PortForProtocol("vtcombo", ""),
+		PortGrpc:        environment.PortForProtocol("vtcombo", "grpc"),
+		HealthCheck:     environment.ProcessHealthCheck("vtcombo"),
+		Env:             environment.EnvVars(),
 	}
 
 	user, pass := mysql.Auth()