FIX-245: Add TLS config for canal (go-mysql-org#496)

* FIX-245: Add TLS config for canal

Author: laskoviymishka

canal/canal.go

@@ -425,6 +425,7 @@ func (c *Canal) prepareSyncer() error {
 SemiSyncEnabled: c.cfg.SemiSyncEnabled,
 MaxReconnectAttempts: c.cfg.MaxReconnectAttempts,
 TimestampStringLocation: c.cfg.TimestampStringLocation,
+TLSConfig: c.cfg.TLSConfig,
 }
 
 if strings.Contains(c.cfg.Addr, "/") {
@@ -453,11 +454,16 @@ func (c *Canal) prepareSyncer() error {
 func (c *Canal) Execute(cmd string, args ...interface{}) (rr *mysql.Result, err error) {
 c.connLock.Lock()
 defer c.connLock.Unlock()
-
+argF := make([]func(*client.Conn), 0)
+if c.cfg.TLSConfig != nil {
+argF = append(argF, func(conn *client.Conn) {
+conn.SetTLSConfig(c.cfg.TLSConfig)
+})
+}
 retryNum := 3
 for i := 0; i < retryNum; i++ {
 if c.conn == nil {
-c.conn, err = client.Connect(c.cfg.Addr, c.cfg.User, c.cfg.Password, "")
+c.conn, err = client.Connect(c.cfg.Addr, c.cfg.User, c.cfg.Password, "", argF...)
 if err != nil {
 return nil, errors.Trace(err)
 }

canal/config.go

@@ -1,6 +1,7 @@
 package canal
 
 import (
+"crypto/tls"
 "io/ioutil"
 "math/rand"
 "time"
@@ -79,6 +80,9 @@ type Config struct {
 // Set to change the maximum number of attempts to re-establish a broken
 // connection
 MaxReconnectAttempts int `toml:"max_reconnect_attempts"`
+
+// Set TLS config
+TLSConfig *tls.Config
 }
 
 func NewConfigWithFile(name string) (*Config, error) {