Mac+VMware+CentOS7 搭建MySQL双实例并实现主从复制

Mac+VMware+CentOS7 搭建MySQL双实例并实现主从复制

1.安装虚拟机

本机是Mac OS系统虚拟机,版本为最新的VMware fusion 7

下载地址：http://pan.baidu.com/s/1o6LoXGu 提取密码：vnlj
可用的序列号:
HYCTT-5L9RQ-44T8L-C1RG5-K2GPC
ZZAX9-UR1QM-M4MQ0-5RYQ6-6C539
LVGJ3-KHW30-M4MRU-T3N7E-RCX43
NYZ5L-HDV3T-44HKM-WW952-227Y1
4VJHT-2YWWP-04J4M-HV4ZE-X378E

2.安装CentOS7

由于系统磁盘空间不富裕，CentOS安装的是CentOS-7.0-XXX-x86_64-Minimal.iso 版：
下载地址：http://mirrors.sina.cn/centos/7/isos/x86_64/

Minimal版本大小约500多M，比DVD版4G和Everything版的7G比，显得实惠多了，但是也少了不少东西，比如连ifconfig、wget都要自己装，不过yum是自带的，所以稍微费一番周折。

2.1.若采用快捷安装root还需初始化()：
http://jingyan.baidu.com/article/4b07be3c687f2748b280f36b.html
2.2.我在安装时碰到了下面告警（我同事在Win主机上部署就没有碰到这个问题）：

针对piix4_smbus ****host smbus controller not enabled的解决方法

[root@Nagios ~]# lsmod | grep i2c_piix4 
i2c_piix4              12574  0 
i2c_core               31274  1 i2c_piix4 
[root@Nagios ~]# vi  /etc/modprobe.d/blacklist.conf 
blacklist i2c_piix4 
[root@Nagios ~]# reboot 

重启后再无此提示！

2.3.查看ip地址，由于ifconfig没有安装，可以通过其它命令查看

ip addr show

如果网卡没有启动，还需要通过ifup命令启动网卡

ip地址是192.168.69.132 ，下一步会用到，通过客户端工具来方位，比如iterm等：（因为这是minimal版本，在server里面操作，不能进行拷贝啊！！）
2.4.通过ssh命令登录 ssh [email protected]

3.安装Mysql

在CentOS中，yum中得mysql版本是MariaDB，如果想装通用的5.6版本，还需要需要参加下列操作：http://serverlab.org/view/8/How-to-install-latest-mysql-5.6-on-CentOS7

3.1.把 Mysql社区增加到 rpm repo中

yum install http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

3.2. 执行安装

yum install mysql-community-server

4.部署双实例

4.1.修改/etc/my.cnf文件

[mysqld_multi]
mysqld = /usr/bin/mysqld_safe
user = mysql
log = /data/mysql/multi.log
[mysqld3306]
port=3306
pid-file=/data/mysql/mysqldata3306/sock/mysql.pid
socket=/data/mysql/mysqldata3306/sock/mysql.sock
atadir=/data/mysql/mysqldata3306/mydata
tmpdir=/data/mysql/mysqldata3306/tmpdir

[mysqld3307]
port=3307
pid-file=/data/mysql/mysqldata3307/sock/mysql.pid
socket=/data/mysql/mysqldata3307/sock/mysql.sock
datadir=/data/mysql/mysqldata3307/mydata
tmpdir=/data/mysql/mysqldata3307/tmpdir

[mysqldump]
quick
max_allowed_packet=2G
default-character-set=utf8

[mysql]
no-auto-rehash
prompt="\\u@\\h : \\d \\r:\\m:\\s> "
default-character-set=utf8
#default-character-set=gbk
show-warnings
#pager=mk-visual-explain

[mysqlhotcopy]
interactive-timeout

[mysqld_safe]
user=mysql
open-files-limit=8192

4.2.创建实例目录，进行数据库初始化

mkdir -p /data/mysql/mysqldata3307/sock
mkdir -p /data/mysql/mysqldata3307/tmpdir
mkdir -p /data/mysql/mysqldata3307/mydata
mkdir -p /data/mysql/mysqldata3307/log
mkdir -p /data/mysql/mysqldata3307/binlog
mkdir -p /data/mysql/mysqldata3307/relaylog
mkdir -p /data/mysql/mysqldata3307/innodb_ts
mkdir -p /data/mysql/mysqldata3307/innodb_log

mkdir -p /data/mysql/mysqldata3306/sock
mkdir -p /data/mysql/mysqldata3306/tmpdir
mkdir -p /data/mysql/mysqldata3306/mydata
mkdir -p /data/mysql/mysqldata3306/log
mkdir -p /data/mysql/mysqldata3306/binlog
mkdir -p /data/mysql/mysqldata3306/relaylog
mkdir -p /data/mysql/mysqldata3306/innodb_ts
mkdir -p /data/mysql/mysqldata3306/innodb_log

mysql_install_db --datadir=/data/mysql/mysqldata3306/mydata/ --user=mysql
mysql_install_db --datadir=/data/mysql/mysqldata3307/mydata/ --user=mysql

4.3.启动双实例

mysqld_multi start 3306
mysqld_multi start 3307

4.4.更改root密码

mysqladmin -S /data/mysql/mysqldata3306/sock/mysql.sock  -u root password 123456
mysqladmin -S /data/mysql/mysqldata3307/sock/mysql.sock  -u root password 123456

4.5.登录数据库

  mysql -uroot -p123456 -P3306

4.6. 另外，MySQL通过yum安装后，默认是开机启动的，双实例后，还需要修改开机启动方式

5.双实例改为双主

参见：http://mysql-mmm.org/mmm2:guide

5.1.编辑/etc/my.cnf文件，在每个实例的参数块中增加：

server_id           = 1 #同步的数据包含server_id,用来防止复制死循环
log_bin             = /var/log/mysql/mysql-bin.log 
log_bin_index       = /var/log/mysql/mysql-bin.log.index 
relay_log           = /var/log/mysql/mysql-relay-bin 
relay_log_index     = /var/log/mysql/mysql-relay-bin.index 
expire_logs_days    = 10 
max_binlog_size     = 100M 
log_slave_updates   = 1 #把所有的操作写入到binary log,双主+读写分离时，必须要配置为1

注意：不同实例的server_id不能相等

5.2.Then get the current position in the binary-log. We will need this values when we setup the replication on db2

(db1) mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+ 
| mysql-bin.000001 |      120 |              |                  | 
+------------------+----------+--------------+------------------+ 
1 row in set (0.00 sec) 

5.3.Configure replication And Start the slave-process

(db2) mysql>CHANGE MASTER TO master_host='localhost', master_port=3306, master_user='root',master_password='123456',master_log_file='mysql-bin.000001', master_log_pos= 120;
(db2) mysql> START SLAVE;

5.4. Also start slave-process on db1

also start