MySQL5.7 利用keepalived来实现mysql双主高可用方案的详细过程

# 下载最新版本：1.2.20

wget http://www.keepalived.org/software/keepalived-1.2.20.tar.gz

# 解压缩安装

tar -xvf keepalived-1.2.20.tar.gz

cd keepalived-1.2.20

yum install openssl* -y

./configure

make

make install

cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/

cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

ln -s /usr/local/sbin/keepalived /usr/sbin/

chmod +x /etc/init.d/keepalived

chkconfig --add keepalived

chkconfig keepalived on

mkdir /etc/keepalived

vim /etc/keepalived/keepalived.conf

global_defs {

notification_email {

haohailuo@163.com

}

notification_email_from mchdba@139.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1 {

state BACKUP   # 2 severs keep the same value.

interface eth0

virtual_router_id 51

priority 100   # priority, the another set to 90

advert_int 1

nopreempt  #don't race to control, set the highst priorty mysql servers only.

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.13.14

}

}

virtual_server 192.168.13.14 3317 {

delay_loop 2   # check the real_server status for every 2 seconds.

lb_algo wrr   #LVS   arithmetic

lb_kind DR    #LVS model

persistence_timeout 60   #k

protocol TCP

real_server 192.168.13.15 3317 {

weight 3

notify_down /usr/local/mysql/bin/mysql.sh  # run the scripts if mysql is down.

TCP_CHECK {

connect_timeout 10    #timeout

nb_get_retry 3       #conect times to try to connect

delay_before_retry 3   #interval of retry

connect_port 3317   # check mysql port

}

}

}

# 1 修改keepalived启动方式

[root@azure_lvdi_dbm1_13_15 mysql]# vim /etc/sysconfig/keepalived

KEEPALIVED_OPTIONS="-D -d -S 0"

# 2 设置路径 /etc/syslog.conf

[root@azure_lvdi_dbm1_13_15 mysql]# vim /etc/syslog.conf

# Log all kernel messages to the console.

# Logging much else clutters up the screen.

#kern.*                         /dev/console

# Log anything (except mail) of level info or higher.

# Don't log private authentication messages!

*.info;mail.none;authpriv.none;cron.none        /var/log/messages

# The authpriv file has restricted access.

authpriv.*                      /var/log/secure

# Log all the mail messages in one place.

mail.*                          -/var/log/maillog

# Log cron stuff

cron.*                          /var/log/cron

# Everybody gets emergency messages

*.emerg                         *

# Save news errors of level crit and higher in a special file.

uucp,news.crit                      /var/log/spooler

# Save boot messages also to boot.log

local7.*                        /var/log/boot.log

# keepalived -S 0

local0.*                                                /var/log/keepalived.log

[root@azure_lvdi_dbm1_13_16 ~]# more /etc/keepalived/keepalived.conf

#vim /etc/keepalived/keepalived.conf

global_defs {

notification_email {

haohailuo@163.com

}

notification_email_from mchdba@139.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1 {

state BACKUP   # 2 severs keep the same value.

interface eth0

virtual_router_id 51

priority 90   # priority, m2 is set to 90

advert_int 1

#nopreempt  #don't race to control, set the highst priorty mysql servers only.

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.13.14

}

}

virtual_server 192.168.13.14 3317 {

delay_loop 2   # check the real_server status for every 2 seconds.

lb_algo wrr   #LVS   arithmetic

lb_kind DR    #LVS model

persistence_timeout 60   #k

protocol TCP

real_server 192.168.13.16 3317 {

weight 3

notify_down /usr/local/mysql/bin/mysql.sh  # run the scripts if mysql is down.

TCP_CHECK {

connect_timeout 10    #

nb_get_retry 3       #conect times to try to connect

delay_before_retry 3   #interval of retry

connect_port 3317   # check mysql port

}

}

}

# 1，建立个测试帐号：

GRANT SELECT, INSERT, UPDATE, DELETE ON `test`.* TO 'kt'@'1%' IDENTIFIED BY 'zhita26ywx18';

# 2，远程通过vip登录

[root@azure_lvdi_dbm1_13_16 keepalived]# mysql -h192.168.13.14 -P3317 -ukt --password="zhita26ywx18"

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 1315

Server version: 5.7.11-log MySQL Community Server (GPL)

Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use business_db

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> insert into t2 select 10;

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

mysql> select * from t2;

+----+

| a  |

+----+

|  1 |

|  3 |

|  4 |

|  3 |

| 10 |

+----+

5 rows in set (0.00 sec)

mysql>

# 1，m1上

mysql> stop slave;

Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> create table test.m select "m1-db" as m1;  # 准备m1表标识m1库

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

mysql> select * from business_db.m1;

+-------+

| m1    |

+-------+

| m1-db |

+-------+

1 row in set (0.00 sec)

mysql>

#2，m2上

mysql> stop slave;

Query OK, 0 rows affected (0.00 sec)

mysql> create table test.m select "m2-db" as m2; # 准备m2表标识m2库

Query OK, 1 row affected (0.00 sec)

Records: 1  Duplicates: 0  Warnings: 0

mysql> select * from business_db.m2;

+-------+

| m2    |

+-------+

| m2-db |

+-------+

1 row in set (0.00 sec)

mysql>

# 关闭mysql服务

[root@azure_lvdi_dbm1_13_16 ~]# service mysqld stop

Shutting down MySQL....                                    [  OK  ]

[root@azure_lvdi_dbm1_13_16 ~]#

# 启动mysql服务

[root@azure_lvdi_dbm1_13_16 ~]# service mysqld start

Starting MySQL..                                           [  OK  ]

[root@azure_lvdi_dbm1_13_16 ~]#

# 判断mysql服务是否关闭，为0关闭

[root@azure_lvdi_dbm1_13_16 ~]# ps -eaf|grep mysqld |grep -v grep |wc |awk '{print $1}'

0

# 判断keepalived是否关闭，为0关闭

[root@azure_lvdi_dbm1_13_16 ~]# ps -eaf|grep keepalived |grep -v grep |wc |awk '{print $1}'

0

[root@azure_lvdi_dbm1_13_16 ~]#

# 通过vip查询test.m表的标识数据来判断vip绑定在哪个mysql实例所在的服务器上

[root@localhost ~]# mysql –h10.254.13.14 -P3317 -ukt --password="zhita26ywx18" -e "select * from test.m";

Warning: Using a password on the command line interface can be insecure.

+-------+

| m1    |

+-------+

| m1-db |

+-------+

[root@localhost ~]#

# 通过vip查询test.m表的标识数据来判断vip绑定在哪个mysql实例所在的服务器上

[root@localhost ~]# mysql –h10.254.13.14 -P3317 -ukt --password="zhita26ywx18" -e "select * from test.m";

Warning: Using a password on the command line interface can be insecure.

+-------+

| m2    |

+-------+

| m2-db |

+-------+

[root@localhost ~]#

# 通过vip查询test.m表的标识数据来判断vip绑定在哪个mysql实例所在的服务器上

[root@localhost ~]# mysql –h10.254.13.14 -P3317 -ukt --password="zhita26ywx18" -e "select * from test.m";

Warning: Using a password on the command line interface can be insecure.

+-------+

| m2    |

+-------+

| m2-db |

+-------+

[root@localhost ~]#

# 通过vip查询test.m表的标识数据来判断vip绑定在哪个mysql实例所在的服务器上

[root@localhost ~]# mysql –h10.254.13.14 -P3317 -ukt --password="zhita26ywx18" -e "select * from test.m";

Warning: Using a password on the command line interface can be insecure.

+-------+

| m1    |

+-------+

| m1-db |

+-------+

[root@localhost ~]#

[root@azure_lvdi_dbm1_13_15 ~]#  keepalived -v

Keepalived v1.2.20 (05/08,2016)

Copyright (C) 2001-2016 Alexandre Cassen, <acassen@gmail.com>

Build options: KRNL_2_6 WITH_LVS HAVE_IPVS_SYNCD WITH_VRRP HAVE_VRRP_VMAC WITHOUT_ADDR_GEN_MODE WITHOUT_SNMP WITHOUT_SNMP_KEEPALIVED WITHOUT_SNMP_CHECKER WITHOUT_SNMP_RFC WITHOUT_SNMP_RFCV2 WITHOUT_SNMP_RFCV3 WITHOUT_LIBNL WITH_VRRP_AUTH WITH_SO_MARK WITHOUT_LIBIPTC WITHOUT_LIBIPSET WITHOUT_IPV4_DEVCONF WITHOUT_IF_H_LINK_H_COLLISION

[root@azure_lvdi_dbm1_13_15 ~]#