mysql 双主
环境
centos5.5
mysql 5.0.77-log
vip:192.168.28.21
server1:192.168.28.128
server2:192.168.28.129
1.
keepalived
安装
2.
mysql
安装
server1 mysql
配置文件
server1 192.168.28.128
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
datadir=/var/lib/mysql
skip-locking
skip-name-resolve
key_buffer = 64M
max_allowed_packet = 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
log-slow-queries = slow.log
max_join_size = 4294967295
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
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
auto_increment_increment=2
auto_increment_offset=2
#binlog_format=mixed
log-bin=mysql-bin
server-id = 5
设置复制帐号
mysql> grant replication slave on *.* to 'repl'@'192.168.28.129' identified by 'repl';
mysql> grant replication slave on *.* to 'repl'@'192.168.28.128' identified by 'repl';
导出数据库
mysqldump -uroot -p --single-transaction --flush-logs --master-data=2 --all-databases > all.sql
server2 mysql
配置文件
server2 192.168.28.129
[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
socket = /tmp/mysql.sock
datadir=/var/lib/mysql
skip-locking
skip-name-resolve
key_buffer = 64M
max_allowed_packet = 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
log-slow-queries = slow.log
max_join_size = 4294967295
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
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
auto_increment_increment=2
auto_increment_offset=1
#binlog_format=mixed
log-bin=mysql-bin
server-id = 8
在server2
上执行
导入数据库
mysql -uroot -poffensive < all.sql
在
server2
上设置主从
change master to
master_host='192.168.28.128',
master_port=3306,
master_user='repl',
master_password='repl',
master_log_file='mysql-bin.000003',
master_log_pos=98;
start slave
在
server1
上设置主从
change master to
master_host='192.168.28.129',
master_port=3306,
master_user='repl',
master_password='repl',
master_log_file='mysql-bin.000001',
master_log_pos=98;
start slave;
安装
keepalived
tar xvf keepalived- 1.2.2 .tar.gz
cd keepalived- 1.2.2
./configure --prefix=/
make && make install
server1
上的keepalived
配置
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script check_run {
script "/root/keepalived_check_mysql.sh"
interval 5
}
vrrp_sync_group VG1 {
group {
VI_1
}
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 88
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass outhink
}
track_script {
check_run
}
virtual_ipaddress {
192.168.28.21
}
}
server2
上的
keepalived
配置
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_script check_run {
script "/root/keepalived_check_mysql.sh"
interval 5
}
vrrp_sync_group VG1 {
group {
VI_1
}
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 88
priority 98
advert_int 1
authentication {
auth_type PASS
auth_pass outhink
}
track_script {
check_run
}
virtual_ipaddress {
192.168.28.21
}
}
mysql
检测脚本
MYSQL=/usr/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=offensive
CHECK_TIME=3
#mysql is working MYSQL_OK is 1 , mysql down MYSQL_OK is 0
MYSQL_OK=1
function check_mysql_helth (){
$MYSQL -h $MYSQL_HOST -u $MYSQL_USER -p$MYSQL_PASSWORD -e "show status;" >/dev/null 2>&1
if [ $? = 0 ] ;then
MYSQL_OK=1
else
MYSQL_OK=0
fi
return $MYSQL_OK
}
while [ $CHECK_TIME -ne 0 ]
do
let "CHECK_TIME -= 1"
check_mysql_helth
if [ $MYSQL_OK = 1 ] ; then
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
done
最后测试
参考 http://linux008.blog.51cto.com/2837805/665390