SetConnectionConfig

go/base/context.go

@@ -288,7 +288,7 @@ func NewMigrationContext() *MigrationContext {
 	}
 }
 
-func (this *MigrationContext) SetConnectionConfig(storageEngine string) error {
+func (this *MigrationContext) SetConnectionConfig(storageEngine string, host string, port int, timeout float64) error {
 	transactionIsolation := "REPEATABLE-READ"
 	switch storageEngine {
 	case "rocksdb":
@@ -299,6 +299,9 @@ func (this *MigrationContext) SetConnectionConfig(storageEngine string) error {
 		transactionIsolation = "REPEATABLE-READ"
 	}
 	this.InspectorConnectionConfig = mysql.NewConnectionConfig(transactionIsolation)
+	this.InspectorConnectionConfig.Key.Hostname = host
+	this.InspectorConnectionConfig.Key.Port = port
+	this.InspectorConnectionConfig.Timeout = timeout
 	this.ApplierConnectionConfig = mysql.NewConnectionConfig(transactionIsolation)
 	return nil
 }

go/cmd/gh-ost/main.go

@@ -47,10 +47,10 @@ func acceptSignals(migrationContext *base.MigrationContext) {
 // main is the application's entry point. It will either spawn a CLI or HTTP interfaces.
 func main() {
 	migrationContext := base.NewMigrationContext()
-	flag.StringVar(&migrationContext.InspectorConnectionConfig.Key.Hostname, "host", "127.0.0.1", "MySQL hostname (preferably a replica, not the master)")
+	host := flag.String("host", "127.0.0.1", "MySQL hostname (preferably a replica, not the master)")
+	port := flag.Int("port", 3306, "MySQL port (preferably a replica, not the master)")
+	timeout := flag.Float64("mysql-timeout", 0.0, "Connect, read and write timeout for MySQL")
 	flag.StringVar(&migrationContext.AssumeMasterHostname, "assume-master-host", "", "(optional) explicitly tell gh-ost the identity of the master. Format: some.host.com[:port] This is useful in master-master setups where you wish to pick an explicit master, or in a tungsten-replicator where gh-ost is unable to determine the master")
-	flag.IntVar(&migrationContext.InspectorConnectionConfig.Key.Port, "port", 3306, "MySQL port (preferably a replica, not the master)")
-	flag.Float64Var(&migrationContext.InspectorConnectionConfig.Timeout, "mysql-timeout", 0.0, "Connect, read and write timeout for MySQL")
 	flag.StringVar(&migrationContext.CliUser, "user", "", "MySQL user")
 	flag.StringVar(&migrationContext.CliPassword, "password", "", "MySQL password")
 	flag.StringVar(&migrationContext.CliMasterUser, "master-user", "", "MySQL user on master, if different from that on replica. Requires --assume-master-host")
@@ -183,6 +183,10 @@ func main() {
 		migrationContext.Log.SetLevel(log.ERROR)
 	}
 
+	if err := migrationContext.SetConnectionConfig(*storageEngine, *host, *port, *timeout); err != nil {
+		migrationContext.Log.Fatale(err)
+	}
+
 	if migrationContext.AlterStatement == "" {
 		log.Fatal("--alter must be provided and statement must not be empty")
 	}
@@ -249,10 +253,6 @@ func main() {
 		migrationContext.Log.Warning("--replication-lag-query is deprecated")
 	}
 
-	if err := migrationContext.SetConnectionConfig(*storageEngine); err != nil {
-		migrationContext.Log.Fatale(err)
-	}
-
 	switch *cutOver {
 	case "atomic", "default", "":
 		migrationContext.CutOverType = base.CutOverAtomic

go/mysql/connection.go

@@ -18,23 +18,23 @@ import (
 )
 
 const (
-	TLS_CONFIG_KEY       = "ghost"
+	TLS_CONFIG_KEY = "ghost"
 )
 
 // ConnectionConfig is the minimal configuration required to connect to a MySQL server
 type ConnectionConfig struct {
-	Key        InstanceKey
-	User       string
-	Password   string
-	ImpliedKey *InstanceKey
-	tlsConfig  *tls.Config
-	Timeout    float64
+	Key                  InstanceKey
+	User                 string
+	Password             string
+	ImpliedKey           *InstanceKey
+	tlsConfig            *tls.Config
+	Timeout              float64
 	transactionIsolation string
 }
 
 func NewConnectionConfig(transactionIsolation string) *ConnectionConfig {
 	config := &ConnectionConfig{
-		Key: InstanceKey{},
+		Key:                  InstanceKey{},
 		transactionIsolation: transactionIsolation,
 	}
 	config.ImpliedKey = &config.Key

go/mysql/connection_test.go

@@ -17,7 +17,6 @@ const (
 	transactionIsolation = "REPEATABLE-READ"
 )
 
-
 func init() {
 	log.SetLevel(log.ERROR)
 }