Mysql主主
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mysql主主同步实现
1，基本的思路是排除数据库单点故障，保障数据高可用性。
2，前期对于要求不高的话可以用主主同步来实现，后期如果不能满足要求可以在后面加从数据库。
3，实验需要的环境及数据库的版本如下表格：
序号 | 名称 | IP地址 | 数据库版本 | 系统版本 |
1 | MySQL-Master01 | 10.93.58.72 | mysql-5.5.32 | CentOS release 6.9 |
2 | MySQL-Master02 | 10.93.58.73 | mysql-5.5.32 | CentOS release 6.9 |
3 | Test | 10.93.58.70 | 无 | CentOS release 6.9 |
4 | virtual IP | 10.93.58.74 | 无 | 无 |
4，正式安装数据步骤：
1）我是用了一个脚本来安装这个Mysql-5.5.32数据库，脚本如下：
#!/bin/bash
#auto_install_mysql
#auth by tony date 2018-07-31
yum -y install gcc gcc-c++ make ncurses ncurses-devel libaio-devel cmake
groupadd mysql
useradd mysql -s/sbin/nologin -M -g mysql
mkdir /application
wget http://10.93.58.70/lamp/mysql-5.5.32.tar.gz
tar xvf mysql-5.5.32.tar.gz
cd mysql-5.5.32
cmake . -DCMAKE_INSTALL_PREFIX=/application/mysql-5.5.32
-DMYSQL_DATADIR=/data/mysql
-DMYSQL_UNIX_ADDR=/application/mysql-5.5.32/tmp/mysql.sock
-DDEFAULT_CHARSET=utf8
-DDEFAULT_COLLATION=utf8_general_ci
-DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii
-DENABLED_LOCAL_INFILE=ON
-DWITH_INNOBASE_STORAGE_ENGINE=1
-DWITH_FEDERATED_STORAGE_ENGINE=1
-DWITH_BLACKHOLE_STORAGE_ENGINE=1
-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1
-DWITHOUT_PARTITION_STORAGE_ENGINE=1
-DWITH_FAST_MUTEXES=1
-DWITH_ZLIB=bundled
-DENABLED_LOCAL_INFILE=1
-DWITH_READLINE=1
-DWITH_EMBEDDED_SERVER=1
-DWITH_DEBUG=0
if [ $? -eq 0 ];then
make && make install
ln -s /application/mysql-5.5.32/ /application/mysql
/bin/cp support-files/mysql.server /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld
chown mysql.mysql /application/mysql
chown mysql.mysql /data
echo 'export PATH=/application/mysql/bin:$PATH '>>/etc/profile
source /etc/profile
mv /etc/my.cnf /etc/my.cnf.bak
cat >/etc/my.cnf <<EOF
[mysqld]
port = 3306
socket = /application/mysql-5.5.32/tmp/mysql.sock
datadir =/data/mysql
user =mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-bin=mysql-bin
server-id = 1
auto_increment_offset=1
auto_increment_increment=2
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
replicate-do-db =all
EOF
/application/mysql/scripts/mysql_install_db --basedir=/application/mysql/ --datadir=/data/mysql --user=mysql
/etc/init.d/mysqld start
chkconfig mysqld on
mysqladmin -uroot password 'hwg123'
echo -e " 33[32m----------------------------------------------- 33[0m"
echo -e " 33[32mThe $M_FILES_DIR Server Install Success ! 33[0m"
else
echo -e " 33[32mThe $M_FILES_DIR Make or Make install ERROR,Please Check......"
exit 0
fi
"mysqlset.sh" 66L, 2228C written
[[email protected] ~]# cat mysqlset.sh
#!/bin/bash
#auto_install_mysql
#auth by tony date 2018-07-31
yum -y install gcc gcc-c++ make ncurses ncurses-devel libaio-devel cmake
groupadd mysql
useradd mysql -s/sbin/nologin -M -g mysql
mkdir /application
wget http://10.93.58.70/lamp/mysql-5.5.32.tar.gz
tar xvf mysql-5.5.32.tar.gz
cd mysql-5.5.32
cmake . -DCMAKE_INSTALL_PREFIX=/application/mysql-5.5.32
-DMYSQL_DATADIR=/data/mysql
-DMYSQL_UNIX_ADDR=/application/mysql-5.5.32/tmp/mysql.sock
-DDEFAULT_CHARSET=utf8
-DDEFAULT_COLLATION=utf8_general_ci
-DEXTRA_CHARSETS=gbk,gb2312,utf8,ascii
-DENABLED_LOCAL_INFILE=ON
-DWITH_INNOBASE_STORAGE_ENGINE=1
-DWITH_FEDERATED_STORAGE_ENGINE=1
-DWITH_BLACKHOLE_STORAGE_ENGINE=1
-DWITHOUT_EXAMPLE_STORAGE_ENGINE=1
-DWITHOUT_PARTITION_STORAGE_ENGINE=1
-DWITH_FAST_MUTEXES=1
-DWITH_ZLIB=bundled
-DENABLED_LOCAL_INFILE=1
-DWITH_READLINE=1
-DWITH_EMBEDDED_SERVER=1
-DWITH_DEBUG=0
if [ $? -eq 0 ];then
make && make install
ln -s /application/mysql-5.5.32/ /application/mysql
/bin/cp support-files/mysql.server /etc/init.d/mysqld
chmod +x /etc/init.d/mysqld
chown mysql.mysql /application/mysql
chown mysql.mysql /data
echo 'export PATH=/application/mysql/bin:$PATH '>>/etc/profile
source /etc/profile
mv /etc/my.cnf /etc/my.cnf.bak
cat >/etc/my.cnf <<EOF
[mysqld]
port = 3306
socket = /application/mysql-5.5.32/tmp/mysql.sock
datadir =/data/mysql
user =mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-bin=mysql-bin
server-id = 1
auto_increment_offset=1
auto_increment_increment=2
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
replicate-do-db =all
EOF
/application/mysql/scripts/mysql_install_db --basedir=/application/mysql/ --datadir=/data/mysql --user=mysql
/etc/init.d/mysqld start
chkconfig mysqld on
mysqladmin -uroot password 'hwg123'
echo -e " 33[32m----------------------------------------------- 33[0m"
echo -e " 33[32mThe $M_FILES_DIR Server Install Success ! 33[0m"
else
echo -e " 33[32mThe $M_FILES_DIR Make or Make install ERROR,Please Check......"
exit 0
fi
2）查看my.cnf配置文件
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
port = 3306
socket = /application/mysql-5.5.32/tmp/mysql.sock
datadir =/data/mysql
user =mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-bin=mysql-bin
binlog_format = mixed
server-id = 1
auto_increment_offset=1
auto_increment_increment=2
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
replicate-do-db =all
3）进入数据库Master01:
[[email protected] ~]# mysql -uroot -p
Enter password:
输入密码：hwg123
4）给数据库授权：mysql> grant replication slave on *.* to 'rep'@'10.93.58.73' identified by "hwg123";
5）查看主库状态；mysql> show master status;
6）在mater02上要做如下几步操作；
7）进入数据库；输入密码hwg123
[[email protected] ~]# mysql -uroot -p
Enter password:
8)根据mysql-bind和post点来授权同步库和post点位。
mysql> change master to master_host='10.93.58.73',master_user='rep',master_password='hwg123',master_log_file='mysql-bin.000014',master_log_pos=263;
Query OK, 0 rows affected (0.06 sec)
9）开启slave同步
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
10）查看同步结果如果是两个YES；证明同步成功：
mysql> show slave statusG;
5，切换到Master02上正式安装mysql-5.5.32。
1）使用脚本安装这里略过
2）查看配置文件，这里注意标红的地方：
[[email protected] ~]# cat /etc/my.cnf
[mysqld]
port = 3306
socket = /application/mysql-5.5.32/tmp/mysql.sock
datadir =/data/mysql
user =mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-bin=mysql-bin
binlog_format = mixed
server-id = 2
auto_increment_offset=2
auto_increment_increment=2
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
replicate-do-db =all
3）进入数据库:输入密码hwg123
[[email protected] ~]# mysql -uroot -p
Enter password:
4）给数据库授权：mysql> grant replication slave on *.* to 'rep'@'10.93.58.72' identified by "hwg123";
5）查看数据库状态：mysql> show master status;
6）切换到master01上授权；
mysql> change master to master_host='10.93.58.73',master_user='rep',master_password='hwg123',master_log_file='mysql-bin.000006',master_log_pos=263;
7）开启slave同步
mysql> slave start;
8）查询同步状态:mysql> show slave statusG;
7)这样主主同步就好了
6，安装keepalived来做高可用。我用的是keepalived-1.2.20.tar.gz
在Master01上操作如下：
yum –y install openssl openssl-devel
tar xf keepalived-1.2.20.tar.gz
cd keepalived-1.2.20
./configure --with-kernel-dir=/usr/src/kernels/2.6.32-696.el6.x86_64
make && make install
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/sbin/keepalived /usr/sbin/
mkdir /etc/keepalived
cd /etc/keepalived/
添加keepalived配置文件
[[email protected] ~]# vim /etc/keepalived/keepalived.conf
#####MASTER keepalived配置文件######
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
state MASTER
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 50
priority 50
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.93.58.74
}
}
virtual_server 10.93.58.74 3306 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 10.93.58.72 3306 {
weight 1
notify_down /root/mysql.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
[[email protected] ~]# vim mysql.sh vim mysql.sh
#!/bin/bash
/etc/init.d/keepalived stop
[[email protected] ~]# chmod +x mysql.sh
在Master02上操作基本和Master01类似，只需要改keepalived.conf,配置如下，注意标红的地方：
#####SLAVE keepalived配置文件#####
! Configuration File for keepalived
global_defs {
notification_email {
}
notification_email_from [email protected]
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
# VIP1
vrrp_instance VI_1 {
state SLAVE
interface eth0
lvs_sync_daemon_inteface eth0
virtual_router_id 50
priority 30
advert_int 5
# nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
10.93.58.74
}
}
virtual_server 10.93.58.74 3306 {
delay_loop 6
lb_algo wrr
lb_kind DR
persistence_timeout 60
protocol TCP
real_server 10.93.58.73 3306 {
weight 1
notify_down /root/mysql.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
7，最后测试一下，停掉Master01主库；没有停主库前的ip。
停了数据库后，看看日志显示；
[[email protected] ~]# /etc/init.d/mysqld stop
Shutting down MySQL. SUCCESS!
[[email protected] ~]# tail -fn20 /var/log/messages
随后查看Master02上面的ip看看VIP有没有漂移过来。
[[email protected] ~]# ip a
最后可以看出来IP已经漂移过来了，实验成功了。
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