// 普通字符串`In JavaScript '\n' is a line-feed.`// 多行字符串`In JavaScript this is
not legal.`
console.log(`string text line 1
string text line 2`);// 字符串中嵌入变量let name ="Bob", time ="today";`Hello ${name}, how are you ${time}?`
auto-increment 两行的配置，使 masterA字段产生的数值是 奇数1，3，5，7 下面的masterB 产生的是 2，4，6，8 等，这样会避开双主 id 重复的问题。
2.2 添加主从同步账户
masterA上：
[root@zhdy-04 mysql]# exportPATH=$PATH:/usr/local/mysql/bin/[root@zhdy-04 mysql]# vim /etc/profile
[root@zhdy-04 mysql]# source /etc/profile
[root@zhdy-04 mysql]# mysql -uroot
mysql> grant replication slave on *.* to 'repl'@'192.168.59.133' identified by 'zhangduanya';
mysql> flush privileges;
masterB上：
[root@zhdy-05 mysql]# exportPATH=$PATH:/usr/local/mysql/bin/[root@zhdy-05 mysql]# vim /etc/profile
[root@zhdy-05 mysql]# source /etc/profile
[root@zhdy-05 mysql]# mysql -uroot
mysql> grant replication slave on *.* to 'repl'@'192.168.59.132' identified by 'zhangduanya';
mysql> flush privileges;
2.2 查看主库的状态
masterA上：
mysql> show master status;+------------------+----------+--------------+------------------+-------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+------------------+----------+--------------+------------------+-------------------+| mysql-bin.000001|208||||+------------------+----------+--------------+------------------+-------------------+1 row inset(0.00 sec)
masterB上：
mysql> show master status;+------------------+----------+--------------+------------------+-------------------+| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |+------------------+----------+--------------+------------------+-------------------+| mysql-bin.000001|120||||+------------------+----------+--------------+------------------+-------------------+1 row inset(0.00 sec)
2.3 配置同步信息：
masterA上：
mysql> change master to master_host='192.168.59.133',master_port=3306,master_user='repl',master_password='zhangduanya',master_log_file='mysql-bin.000001',master_log_pos=120;
mysql> start slave;
mysql> show slave status\G***************************1. row ***************************Slave_IO_State: Waiting for master to send event
Master_Host:192.168.59.133Master_User: repl
Master_Port:3306Connect_Retry:60Master_Log_File: mysql-bin.000001Read_Master_Log_Pos:120Relay_Log_File: zhdy-04-relay-bin.000002Relay_Log_Pos:283Relay_Master_Log_File: mysql-bin.000001Slave_IO_Running: Yes
Slave_SQL_Running: Yes
masterB上：
mysql> change master to master_host='192.168.59.132',master_port=3306,master_user='repl',master_password='zhangduanya',master_log_file='mysql-bin.000001',master_log_pos=208;
mysql> start slave;
mysql> show slave status\G***************************1. row ***************************Slave_IO_State: Waiting for master to send event
Master_Host:192.168.59.132Master_User: repl
Master_Port:3306Connect_Retry:60Master_Log_File: mysql-bin.000001Read_Master_Log_Pos:208Relay_Log_File: zhdy-05-relay-bin.000002Relay_Log_Pos:283Relay_Master_Log_File: mysql-bin.000001Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Jetpropelledsnake212019-02-15 16:27:47
