mysql双主复制并利用keepalived做高可用_MySQL

比特网

1、架构
      vip 192.168..45.244
      mysql-1:192.168.45.238
      mysql-2:192.168.45.239

2、mysql双主设置
      192.168 .45.238
#vim /etc/my.cnf
[client]
端口            = 3306
套接字          = /tmp/mysql.sock

[mysqld]
端口            = 3306
套接字          = /tmp/mysql.sock
datadir=/usr/local/mysql/var/
跳过锁定
跳过名称解析
key_buffer = 64M
max_allowed_pa​​cket = 64M
table_cache = 2048
sort_buffer_size = 4M
net_buffer_length = 256K
read_buffer_size = 10M
read_rnd_buffer_size = 10M
myisam_sort_buffer_size = 16M
Interactive_timeout = 240
wait_timeout = 240
max_connections = 800
connect_timeout=30
open_files_limit=8192
query_cache_size = 1024M
thread_cache_size=16
thread_concurrency = 8
long_query_time = 1
日志慢查询= Slow.log

innodb_additional_mem_pool_size = 8M
innodb_buffer_pool_size = 32M
innodb_log_buffer_size=8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
nodb_file_io_threads = 8
innodb_lock_wait_timeout= 50
innodb_thread_concurrency = 16
innodb_file_per_table

log_slave_updates
expire_logs_days=7
auto_increment_increment=2
auto_increment_offset=2
binlog_format=mixed
日志箱=mysql-bin
server-id       = 8

[mysqldump]
快速
max_allowed_pa​​cket = 16M

[mysql]
禁止自动重新哈希

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
Interactive-timeout
设置mysql复制账号
mysql>GRANT REPLICATION SLAVE ON *.* TO 'repl'@' 192.168.45.238' IDENTIFIED BY 'repl_123';
mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.45.239' IDENTIFIED BY 'repl_123';
还原数据库
#mysqldump -uroot -p --single-transaction --flush-logs --master-data=2 --all-databases > all.sql
192.168.45.239

mysql 配置
#vim /etc/my.cnf
[client]
端口            = 3306
套接字          = /tmp/mysql. sock

[mysqld]
端口            = 3306
套接字          = /tmp/mysql.sock
datadir=/usr/local/mysql/var/
跳过锁定
跳过名称解析
key_buffer = 64M
max_allowed_pa​​cket = 64M
table_cache = 128
sort_buffer_size = 4M
net_buffer_length = 256K
read_buffer_size = 10M
read_rnd_buffer_size = 1 0M
myisam_sort_buffer_size = 64M
Interactive_timeout = 240
wait_timeout = 240
max_connections = 800
connect_timeout=30
open_files_limit=8192
query_cache_size = 1024M
thread_cache_size=16
线程并发 = 8
long_query_time = 1
log-slow-queries = Slow.log

innodb_additional_mem_pool_size = 8M
innodb_buffer_pool_size = 64M
innodb_log_buffer_size=8M
innodb_log_file_size = 256 M
innodb_log_files_in_group = 3
innodb_file_io_threads = 8
innodb_lock_wait_timeout= 50
innodb_thread_concurrency = 16
innodb_file_per_table

log_slave_updates
expire_logs_days=7
自动_increment_increment=2
auto_increment_offset =1
binlog_format=mixed
log-bin=mysql-bin
服务器 ID       = 9

[mysqldump]
快速
max_allowed_pa​​cket = 16M

[mysql]
no-auto-rehash

[isamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
交互超时
导入主库数据
#mysql -uroot -p
#mysql -uroot -p
all.sql
设置同步
mysql>将主机更改为 MASTER_HOST='192.168.45.238',MASTER_PORT='3306',MASTER_USER='repl',MASTER_PASSWORD='repl_123',MASTER_LOG_FILE='mysql-bin.000004',MASTER_LOG_POS=106;
mysql> start Slave;
在192.168.45.238上设置同步
mysql>CHANGE MASTER TOMASTER_HOST='192.168.45.239',MASTER_PORT='3306',MASTER_USER='repl',MASTER_PASSWORD='repl_123',MASTER_LOG_FILE='mysql -bin.000008',MASTER_LOG_POS=105020214;
mysql>start Slave;
3、配置keepalived
192.168.45.238
192.168.45.239
安装keepalived
wget http:// www.keepalived.org/software/keepalived-1.2.2.tar.gz
tar zxvf keepalived-1.2.2.tar.gz
cd keepalived-1.2.2
./configure --prefix= /
make
make install
192.168.45.238 keepalived 配置
6># vim /etc/keepalived/keepalived.conf
! keepalived的配置文件
global_defs {
    router_id Yuangnag.com
}
vrrp_script check_run {
    script "/root/keepalived_check_mysql.sh"
    间隔 5
}
vrrp_sync_group VG1 {
     组 {
        VI_1
     }
}
vrrp_instance VI_1 {
     状态 MASTER
     接口 eth0
     virtual_router_ id 88
     优先级 100
     advert_int 1
     nopreempt
     身份验证 {
         auth_type PASS
         auth_passyuangang.net
     }
     track_script {
         check_run
     }
     virtual_ipaddress {
         192.168.45.244
     }
}
检测mysql脚本配置（类似于mysql的配置）
#vim #!/bin/bash
MYSQL=/usr/local/mysql/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=
CHECK_TIME=3
#mysql 正在工作 MYSQL_OK 为 1 ，mysql 关闭 MYSQL_OK 为 0
MYSQL_OK=1
function check_mysql_helth ( ){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -e "显示状态;" >/dev/null 2>&1
if [ $? = 0 ] ;然后
     MYSQL_OK=1
else
     MYSQL_OK=0
fi
     return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
执行
     let "CHECK_TIME -= 1"
     check_mysql_helth
if [ $MYSQL_OK = 1 ] ;然后
     CHECK_TIME=0

     exit 0

fi

if [ $MYSQL_OK -eq 0 ] &&  [ $CHECK_TIME -eq 0 ]
then
     /etc/init. d/keepalived stop
exit 1
fi
sleep 1
完成
#!/bin/bash
MYSQL=/usr/local/mysql/bin/mysql
MYSQL_HOST =localhost
MYSQL_USER=root
MYSQL_PASSWORD=
CHECK_TIME=3
#mysql 正在工作 MYSQL_OK 为 1 ，mysql 关闭 MYSQL_OK 为 0
MYSQL_OK=1
function check_mysql_helth (){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -e "显示状态;" >/dev/null 2>&1
if [ $? = 0 ] ;然后
     MYSQL_OK=1
else
     MYSQL_OK=0
fi
     return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
执行
     let "CHECK_TIME -= 1"
     check_mysql_helth
if [ $MYSQL_OK = 1 ] ;然后
     CHECK_TIME=0

     exit 0

fi

if [ $MYSQL_OK -eq 0 ] &&  [ $CHECK_TIME -eq 0 ]
then
     /etc/init. d/keepalived stop
exit 1
fi
sleep 1

完成 chmod 755 /root/keepalived_check_mysql.sh

192.168.45.239 keepalived 配置
# vim /etc/keepalived/keepalived.conf
! keepalived的配置文件
global_defs {
    router_id Yuangang.com
}
vrrp_script check_run {
    script "/root/keepalived_check_mysql.sh"
    间隔 5
}
vrrp_sync_group VG1 {
     组 {
       VI_1
     }
}
vrrp_instance VI_1 {
     状态 BACKUP
     接口 eth0
     virtual_router_ ID 88
     优先级 80
     advert_int 1
     身份验证 {
         auth_type PASS
         auth_passyuangang.com
     }
     track_script {
         check_run
     }
     virtual_ipaddress {
         192.168.45.244
     }
}
启动 238 上的keepalived mysql
/etc/init.d/keepalived start
/etc/init.d/mysqld start
启动239上的keepalived mysql
/ etc/init.d/keepalived start
/etc/init.d/mysqld start

测试，关闭238上的mysql在另外一台机器上用vip连接mysql
            关闭239上的mysql在另外一台机器上用vip连接mysql
作者“linux运维”

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