Mysql主主复制故障自动切换解决方案

1. MySQL-VIP：192.168.0.50

2. MySQL-master1：192.168.0.42

3. MySQL-master2：192.168.0.49

5. OS版本：CentOS 5.5

6. MySQL版本：5.5.13

7. Keepalived版本：keepalived-1.2.7.tar.gz

一、MySQL master-master配置

　1、修改MySQL配置文件

　　两台MySQL均如要开启binlog日志功能，开启方法：在MySQL配置文件[MySQLd]段中加上log-bin=MySQL-bin选项

　　两台MySQL的server-ID不能一样，默认情况下两台MySQL的serverID都是1，需将其中一台修改为2即可

　　这里省略掉创建主主过程，简单描述如下，在2太服务器上分别创建账号，然后实例化彼此的从服务器！即可！

二、keepalived安装及配置

安装keepalived

1. #tar zxvf keepalived-1.1.20.tar.gz

2. #cd keepalived-1.1.20

3. #./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686

4. #make && make install

[root@slave01 keepalived-1.2.7]# ./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686

checking for gcc... gcc

checking whether the C compiler works... yes

checking for C compiler default output file name... a.out

checking for suffix of executables...

checking whether we are cross compiling... no

checking for suffix of object files... o

checking whether we are using the GNU C compiler... yes

checking whether gcc accepts -g... yes

checking for gcc option to accept ISO C89... none needed

checking for a BSD-compatible install... /usr/bin/install -c

checking for strip... strip

checking how to run the C preprocessor... gcc -E

checking for grep that handles long lines and -e... /bin/grep

checking for egrep... /bin/grep -E

checking for ANSI C header files... yes

checking for sys/wait.h that is POSIX.1 compatible... yes

checking for sys/types.h... yes

checking for sys/stat.h... yes

checking for stdlib.h... yes

checking for string.h... yes

checking for memory.h... yes

checking for strings.h... yes

checking for inttypes.h... yes

checking for stdint.h... yes

checking for unistd.h... yes

checking fcntl.h usability... yes

checking fcntl.h presence... yes

checking for fcntl.h... yes

checking syslog.h usability... yes

checking syslog.h presence... yes

checking for syslog.h... yes

checking for unistd.h... (cached) yes

checking sys/ioctl.h usability... yes

checking sys/ioctl.h presence... yes

checking for sys/ioctl.h... yes

checking sys/time.h usability... yes

checking sys/time.h presence... yes

checking for sys/time.h... yes

checking openssl/ssl.h usability... yes

checking openssl/ssl.h presence... yes

checking for openssl/ssl.h... yes

checking openssl/md5.h usability... yes

checking openssl/md5.h presence... yes

checking for openssl/md5.h... yes

checking openssl/err.h usability... yes

checking openssl/err.h presence... yes

checking for openssl/err.h... yes

checking whether ETHERTYPE_IPV6 is declared... no

checking for MD5_Init in -lcrypto... yes

checking for SSL_CTX_new in -lssl... yes

checking for poptGetContext in -lpopt... yes

checking for nl_socket_modify_cb in -lnl... no

configure: WARNING: keepalived will be built without libnl support.

checking for kernel version... 2.6.18

checking for IPVS syncd support... yes

checking for kernel macvlan support... no

checking for an ANSI C-conforming const... yes

checking for pid_t... yes

checking whether time.h and sys/time.h may both be included... yes

checking whether gcc needs -traditional... no

checking for working memcmp... yes

checking return type of signal handlers... void

checking for gettimeofday... yes

checking for select... yes

checking for socket... yes

checking for strerror... yes

checking for strtol... yes

checking for uname... yes

configure: creating ./config.status

config.status: creating Makefile

config.status: creating genhash/Makefile

config.status: creating keepalived/core/Makefile

config.status: creating keepalived/include/config.h

config.status: creating keepalived.spec

config.status: creating keepalived/Makefile

config.status: creating lib/Makefile

config.status: creating keepalived/vrrp/Makefile

config.status: creating keepalived/check/Makefile

config.status: creating keepalived/libipvs-2.6/Makefile

Keepalived configuration

------------------------

Keepalived version : 1.2.7

Compiler : gcc

Compiler flags : -g -O2 -DETHERTYPE_IPV6=0x86dd

Extra Lib : -lpopt -lssl -lcrypto

Use IPVS Framework : Yes

IPVS sync daemon support : Yes

IPVS use libnl : No

Use VRRP Framework : Yes

Use VRRP VMAC : No

SNMP support : No

Use Debug flags : No

[root@slave01 keepalived-1.2.7]# make && make install

make -C lib || exit 1;

make[1]: Entering directory `/usr/local/keepalived-1.2.7/lib'

make[1]: Nothing to be done for `all'.

make[1]: Leaving directory `/usr/local/keepalived-1.2.7/lib'

make -C keepalived

make[1]: Entering directory `/usr/local/keepalived-1.2.7/keepalived'

make[2]: Entering directory `/usr/local/keepalived-1.2.7/keepalived/core'

gcc -g -O2 -DETHERTYPE_IPV6=0x86dd -I/usr/src/kernels/2.6.18-164.el5-i686/include -I/usr/src/kernels/2.6.18-164.el5-i686/include -I../include -I../../lib -Wall -Wunused -Wstrict-prototypes -D_KRNL_2_6_ -D_WITH_LVS_ -D_WITH_VRRP_ -D_WITHOUT_SNMP_ -c main.c

make[2]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived/core'

make[2]: Entering directory `/usr/local/keepalived-1.2.7/keepalived/check'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived/check'

make[2]: Entering directory `/usr/local/keepalived-1.2.7/keepalived/vrrp'

make[2]: Nothing to be done for `all'.

make[2]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived/vrrp'

make[2]: Entering directory `/usr/local/keepalived-1.2.7/keepalived/libipvs-2.6'

gcc -g -O2 -DETHERTYPE_IPV6=0x86dd -I/usr/src/kernels/2.6.18-164.el5-i686/include -I/usr/src/kernels/2.6.18-164.el5-i686/include -DLIBIPVS_DONTUSE_NL -Wall -Wunused -c -o libipvs.o libipvs.c

gcc -g -O2 -DETHERTYPE_IPV6=0x86dd -I/usr/src/kernels/2.6.18-164.el5-i686/include -I/usr/src/kernels/2.6.18-164.el5-i686/include -DLIBIPVS_DONTUSE_NL -Wall -Wunused -c -o ip_vs_nl_policy.o ip_vs_nl_policy.c

ar rv libipvs.a libipvs.o ip_vs_nl_policy.o

r - libipvs.o

r - ip_vs_nl_policy.o

rm libipvs.o ip_vs_nl_policy.o

make[2]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived/libipvs-2.6'

Building ../bin/keepalived

strip ../bin/keepalived

Make complete

make[1]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived'

make -C genhash

make[1]: Entering directory `/usr/local/keepalived-1.2.7/genhash'

strip ../bin/genhash

Make complete

make[1]: Leaving directory `/usr/local/keepalived-1.2.7/genhash'

Make complete

make -C keepalived install

make[1]: Entering directory `/usr/local/keepalived-1.2.7/keepalived'

install -d /usr/local/keepalived/sbin

install -m 700 ../bin/keepalived /usr/local/keepalived/sbin/

install -d /usr/local/keepalived/etc/rc.d/init.d

install -m 755 etc/init.d/keepalived.init /usr/local/keepalived/etc/rc.d/init.d/keepalived

install -d /usr/local/keepalived/etc/sysconfig

install -m 755 etc/init.d/keepalived.sysconfig /usr/local/keepalived/etc/sysconfig/keepalived

install -d /usr/local/keepalived/etc/keepalived/samples

install -m 644 etc/keepalived/keepalived.conf /usr/local/keepalived/etc/keepalived/

install -m 644 ../doc/samples/* /usr/local/keepalived/etc/keepalived/samples/

install -d /usr/local/keepalived/share/man/man5

install -d /usr/local/keepalived/share/man/man8

install -m 644 ../doc/man/man5/keepalived.conf.5 /usr/local/keepalived/share/man/man5

install -m 644 ../doc/man/man8/keepalived.8 /usr/local/keepalived/share/man/man8

make[1]: Leaving directory `/usr/local/keepalived-1.2.7/keepalived'

make -C genhash install

make[1]: Entering directory `/usr/local/keepalived-1.2.7/genhash'

install -d /usr/local/keepalived/bin

install -m 755 ../bin/genhash /usr/local/keepalived/bin/

install -d /usr/local/keepalived/share/man/man1

install -m 644 ../doc/man/man1/genhash.1 /usr/local/keepalived/share/man/man1

make[1]: Leaving directory `/usr/local/keepalived-1.2.7/genhash

配置keepalived

默认情况下keepalived启动时会去/etc/keepalived目录下找配置文件，我们在新创建一个keepalived.conf文件（这两台服务器都要配置同样的文件有几个参数有差异请仔细查阅）；

192.168.0.42中的；

vi /etc/keepalived/keepalived.conf

global_defs {

notification_email {

1042372071@qq.com

}

notification_email_from 1042372071@qq.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 90

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.0.50

}

}

virtual_server 192.168.0.50 3306 {

delay_loop 2

lb_algo wrr

lb_kind DR

persistence_timeout 60

protocol TCP

real_server 192.168.0.42 3306 {

weight 3

notify_down /usr/local/mysql/bin/MySQL.sh

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 3306

}

}

192.168.0.49中的；

global_defs {

notification_email {

1

interface eth0

virtual_router_id 51

priority 100

advert_int 1

nopreempt

authentication {

auth_type PASS

auth_pass 1111

bal_defs {

notification_email {

1042372071@qq.com

}

notification_email_from 1042372071@qq.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id MySQL-ha

}

vrrp_instance VI_1 {

state BACKUP

interface eth0

virtual_router_id 51

priority 100

advert_int 1

nopreempt

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.0.50

}

}

virtual_server 192.168.0.50 3306 {

delay_loop 2

lb_algo wrr

lb_kind DR

persistence_timeout 60

protocol TCP

real_server 192.168.0.49 3306 {

weight 3

notify_down /usr/local/mysql/bin/MySQL.sh

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 3306

}

}

这里创建我们检测服务down后所要执行的脚本

#vi /usr/local/mysql/bin/MySQL.sh

#!/bin/sh

pkill keepalived

#chmod +x /usr/local/mysql/bin/MySQL.sh

要知道如果是root创建的还要做权限变更；

如下操作；

chmod +x /usr/local/mysql

chown -R mysql.mysql /usr/local/mysql

chmod +x /usr/local/mysql/bin/MySQL.sh

启动keepalived

1.#/usr/local/keepalived/sbin/keepalived –D

2. #ps -aux | grep keepalived

（停止进程的话，直接kill，哈哈）

至此配置工作已经做完，记下来就是测试工作，可一个远程msyql服务可以ping我们的50端口，然后再另启动一个会话，在链接到50端口上

如下；

D:\Program Files\uptime software\uptime\mysql\bin>mysql.exe -uroot -p -h1492.168.0.50 -P3306

Enter password:

ERROR 2005 (HY000): Unknown MySQL server host '1492.168.0.50' (11004)

D:\Program Files\uptime software\uptime\mysql\bin>mysql.exe -uroot -proot -h192.

168.0.50 -P3306

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

Your MySQL connection id is 3275

Server version: 5.5.13-log Source distribution

Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> show databases;

+--------------------+

| Database |

+--------------------+

| information_schema |

| inno |

| mysql |

| performance_schema |

| test |

| test_db |

+--------------------+

6 rows in set (0.07 sec)

然后进行故障测试，分别对keepalived和，mysql服务分别停掉看看不同服务切换的效果！以下是我测试的；

mysql>

mysql> show databases;

ERROR 2013 (HY000): Lost connection to MySQL server during query

mysql> show databases;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id: 601

Current database: *** NONE ***

+--------------------+

| Database |

+--------------------+

| information_schema |

| inno |

| mysql |

| performance_schema |

| test |

| test_db |

+--------------------+

6 rows in set (0.01 sec)

mysql> show databases;

ERROR 2013 (HY000): Lost connection to MySQL server during query

mysql> show databases;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id: 3665

Current database: *** NONE ***

+--------------------+

| Database |

+--------------------+

| information_schema |

| inno |

| mysql |

| performance_schema |

| test |

| test_db |

+--------------------+

6 rows in set (0.00 sec)

mysql> show databases;

ERROR 2013 (HY000): Lost connection to MySQL server during query

mysql> show databases;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id: 1033

Current database: *** NONE ***

+--------------------+

| Database |

+--------------------+

| information_schema |

| inno |

| mysql |

| performance_schema |

| test |

| test_db |

+--------------------+

6 rows in set (0.01 sec)