mysql主从复制及失败切换

软件环境：

mysql软件包：mysql-5.6.17.tar.gz

cmake软件包：cmake-2.8.12.2.tar.gz @ wget http://www.cmake.org/files/v2.8/cmake-2.8.12.2.tar.gz

系统版本：

[root@db src]# uname -a

                    Linux db.jrzj.com 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

[root@backup yum.repos.d]# uname -a Linux backup.jrzj.com 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

开始安装：

==============

1:安装cmake：

[root@db cmake-2.8.12.2]# yum install gcc

                    [root@db cmake-2.8.12.2]# yum install gcc-C++

                    [root@db cmake-2.8.12.2]# yum install make

                    [root@db cmake-2.8.12.2]# ./configure

                    [root@db cmake-2.8.12.2]# make && make install

2:安装mysql

为mysql创建用户

[root@db mysql-5.6.17]# useradd mysql

创建mysql数据文件存放目录

[root@db mysql-5.6.17]# mkdir /data/

开始安装mysql

[root@db mysql-5.6.17]# cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/data/ -DMYSQL_UNIX_ADDR=/tmp/mysqld.sock -DEXTRA_CHARSETS=all -DDEFAULT_CHARSET=GBK -DDEFAULT_COLLATION=gbk_chinese_ci

[root@db mysql-5.6.17]# make && make install

error for cmake

CMake Error at cmake/readline.cmake:85 (MESSAGE):

Curses library not found. Please install appropriate package,

     remove CMakeCache.txt and rerun cmake.On Debian/Ubuntu, package name is libncurses5-dev, on Redhat and derivates it is ncurses-devel.

Call Stack (most recent call first):

cmake/readline.cmake:128 (FIND_CURSES)

cmake/readline.cmake:202 (MYSQL_USE_BUNDLED_EDITLINE)

CMakeLists.txt:411 (MYSQL_CHECK_EDITLINE)

[root@db mysql-5.6.17]# yum install ncurses-devel

[root@db mysql-5.6.17]# rm CMakeCache.txt

rm：是否删除普通文件 "CMakeCache.txt"？y

初始化mysql

[root@db /]#  chown -R mysql.mysql /usr/local/mysql

                        [root@db /]#  chown -R mysql.mysql /data/

                        [root@db /]#  cd /usr/local/mysql/scripts

                        [root@db scripts]#  ./mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/data/ --collation-server=gbk_chinese_ci

[root@db scripts]# cd ../support-files/

[root@db support-files]# cp mysql.server /etc/rc.d/init.d/mysqld

[root@db support-files]# chkconfig --add mysqld

[root@db support-files]# chkconfig mysqld on

[root@db support-files]# echo 'PATH=$PATH:/usr/local/mysql/bin/' >> /etc/profile

[root@db support-files]# source /etc/profile

[root@db support-files]# mysql_secure_installation

[root@db support-files]# service mysqld start

Starting MySQL. SUCCESS!

[root@db support-files]# mysqladmin -u root password 1234qwer

[root@db support-files]# mysql -u root -p

Enter password:

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

mysql> status

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

mysql Ver 14.14 Distrib 5.6.17, for Linux (x86_64) using EditLine wrapper

Connection id:7

Current database:

Current user:root@localhost

SSL:Not in use

Current pager:stdout

Using outfile:''

Using delimiter:;

Server version:5.6.17 Source distribution

Protocol version:10

Connection:Localhost via UNIX socket

Server characterset:gbk

Db characterset:gbk

Client characterset:gbk

Conn. characterset:gbk

UNIX socket:/tmp/mysqld.sock

Uptime:4 min 33 sec

Threads: 1  Questions: 19  Slow queries: 0  Opens: 67  Flush tables: 1  Open tables: 60  Queries per second avg: 0.069

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

============

单节点mysql安装完成

============

重复以上操作安装mysql_backup

=============

设置root用户可远程登录

grant all privileges  on *.* to root@'%' identified by "root";

                    mysql -h 192.168.0.176-u root -p

============

设置主从：

主DB：

[root@db etc]# mysql -u root -p

                            Enter password:

                            mysql>  create user jrzj IDENTIFIED BY '123456';

                            Query OK, 0 rows affected (0.00 sec)

mysql> GRANT REPLICATION SLAVE ON *.* to 'jrzj'@'192.168.0.176' identified by '1234qwer'; Query OK, 0 rows affected (0.00 sec) [root@db etc]# vim /etc/my.cnf server_id=177 log-bin=jrzj-bin [root@db etc]# service mysqld restart Shutting down MySQL.. SUCCESS! Starting MySQL. SUCCESS!

查看日志偏移量：

mysql> show master status \G

*************************** 1. row ***************************

File: jrzj-bin.000002

Position: 120

Binlog_Do_DB:

Binlog_Ignore_DB:

Executed_Gtid_Set:

1 row in set (0.00 sec)

mysql> flush tables with read lock;

导出数据库：

[root@db tmp]# mysqldump -p3306 -uroot -p -S /tmp/mysqld.sock --all-databases > /tmp/mysql.sql

从DB配置

[root@db etc]# vim /etc/my.cnf

                            server_id=176

[root@backup tmp]# mysql -uroot -p < /tmp/mysql.sql

                            mysql> change master to

                            -> master_host='192.168.0.177',

                            -> master_user='jrzj',

                            -> master_password='1234qwer',

                            -> master_port=3306,

                            -> master_log_file='jrzj-bin.000002',

                            -> master_log_pos=120;

                            mysql>  show slave status\G;

                            ***************************1. row ***************************

                                          Slave_IO_State: Waiting for master to send event

                                             Master_Host:192.168.0.177

                                             Master_User: jrzj

                                             Master_Port:3306

                                           Connect_Retry:60

                                         Master_Log_File: jrzj-bin.000002

                                     Read_Master_Log_Pos:120

                                          Relay_Log_File: backup-relay-bin.000002

                                           Relay_Log_Pos:282

                                   Relay_Master_Log_File: jrzj-bin.000002

                                        Slave_IO_Running: Yes

                                       Slave_SQL_Running: Yes

                                         Replicate_Do_DB:

                                     Replicate_Ignore_DB:

                                      Replicate_Do_Table:

                                  Replicate_Ignore_Table:

                                 Replicate_Wild_Do_Table:

                             Replicate_Wild_Ignore_Table:

                                              Last_Errno:0

                                              Last_Error:

                                            Skip_Counter:0

                                     Exec_Master_Log_Pos:120

                                         Relay_Log_Space:456

                                         Until_Condition: None

                                          Until_Log_File:

                                           Until_Log_Pos:0

                                      Master_SSL_Allowed: No

                                      Master_SSL_CA_File:

                                      Master_SSL_CA_Path:

                                         Master_SSL_Cert:

                                       Master_SSL_Cipher:

                                          Master_SSL_Key:

                                   Seconds_Behind_Master:0

                            Master_SSL_Verify_Server_Cert: No

                                           Last_IO_Errno:0

                                           Last_IO_Error:

                                          Last_SQL_Errno:0

                                          Last_SQL_Error:

                             Replicate_Ignore_Server_Ids:

                                        Master_Server_Id:177

                                             Master_UUID: e0fe5f94-c633-11e3-8f4e-0050568ea576

                                        Master_Info_File:/data/master.info

                                               SQL_Delay:0

                                     SQL_Remaining_Delay: NULL

                                 Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it

                                      Master_Retry_Count:86400

                                             Master_Bind:

                                 Last_IO_Error_Timestamp:

                                Last_SQL_Error_Timestamp:

                                          Master_SSL_Crl:

                                      Master_SSL_Crlpath:

                                      Retrieved_Gtid_Set:

                                       Executed_Gtid_Set:

                                           Auto_Position:0

=============

主从配置完成

==========

将mysql配置为互为主从，开启slave的bin log 并授权访问

=========

高可用配置

=========

0.176/0.177

[root@db tmp]# yum install ipvsadm keepalived

                        [root@db tmp]# chkconfig keepalived on

[root@db tmp]# cat /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

notification_email {

yangjob2013@126.com

}

notification_email_from yangjob2013@126.com

smtp_server smtp.126.com

smtp_connect_timeout 30

router_id HA

}

vrrp_instance VI_1 {

state MASTER

interface eth0

virtual_router_id 51

priority 100

advert_int 1

preempt

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.0.16

}

[root@db tmp]# cat /tmp/check_mysql.sh

MYSQL="/usr/local/mysql/bin/mysql"

MYSQL_HOST=127.0.0.1

MYSQL_USER=root

MYSQL_PASSWORD=1234qwer

LOG_FILE="/tmp/log/check_mysql.log"

MYSQL_OK=1 # mysql is working MYSQL_OK is 1 , mysql down MYSQL_OK is 0

check_mysql_helth()

{

$MYSQL -h$MYSQL_HOST -u$MYSQL_USER -p${MYSQL_PASSWORD} -e "show status" &>/dev/null

if [ $? = 0 ] ; then

MYSQL_OK=1

else

MYSQL_OK=0

fi

return $MYSQL_OK

}

check_keepalived()

{

ps -ef | grep keepalived | grep -v grep > /dev/null

if [ $? = 0 ];then

keepalived_OK=1

else

keepalived_OK=0

fi

return $keepalived_OK

}

while :

do

CHECK_TIME=3

while [ $CHECK_TIME -ne 0 ]

do

let "CHECK_TIME -= 1"

check_mysql_helth

if [ $MYSQL_OK == 1 ];then

check_keepalived

if [ $keepalived_OK == 1 ];then

break

else

service keepalived start >>$LOG_FILE

break

fi

elif [ $MYSQL_OK -eq 0 ] && [ $CHECK_TIME -eq 0 ];then

service keepalived stop >> $LOG_FILE

echo `date --date=today +"%Y-%M-%d %H:%m:%S"` - [INFO] - mysql invaild. keepalived stop. >> $LOG_FILE

fi

done

[root@db tmp]#service mysqld start

[root@db tmp]#service keepalibed start

[root@db tmp]# nohup ./check_mysql.sh &

转载于:https://blog.51cto.com/crazyants/1406451

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