c mysql 双主复制_mysql双主复制及使用keepalived作高可用的配置详解
1、系統(tǒng)環(huán)境架構(gòu) vip 192.168..45.244
mysql-1:192.168.45.238
mysql-2:192.168.45.239
2、mysql雙主設(shè)置
192.168.45.238 代碼示例:
#vim /etc/my.cnf
[client]
port????? = 3306
socket??? = /tmp/mysql.sock
[mysqld]
port?? = 3306
socket = /tmp/mysql.sock
datadir=/usr/local/mysql/var/
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
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?????? = 8
[mysqldump]
quick
max_allowed_packet = 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]
interactive-timeout
1)、設(shè)置mysql復(fù)制賬號 代碼示例:
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';
2)、導(dǎo)出數(shù)據(jù)庫 代碼示例:
#mysqldump -uroot -p --single-transaction --flush-logs --master-data=2 --all-databases > all.sql
192.168.45.239
3)、mysql配置 代碼示例:
#vim /etc/my.cnf
[client]
port??????????? = 3306
socket????????? = /tmp/mysql.sock
[mysqld]
port??????????? = 3306
socket????????? = /tmp/mysql.sock
datadir=/usr/local/mysql/var/
skip-locking
skip-name-resolve
key_buffer = 64M
max_allowed_packet = 64M
table_cache = 128
sort_buffer_size = 4M
net_buffer_length = 256K
read_buffer_size = 10M
read_rnd_buffer_size = 10M
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
thread_concurrency = 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 = 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?????? = 9
[mysqldump]
quick
max_allowed_packet = 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]
interactive-timeout
4)、導(dǎo)入主庫數(shù)據(jù) 代碼示例:
#mysql -uroot -p < all.sql
5)、設(shè)置同步 代碼示例:
mysql> CHANGE MASTER TO 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上設(shè)置同步 代碼示例:
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
1)、安裝keepalived 代碼示例:
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
2)、192.168.45.238 keepalived 配置 代碼示例:
6># vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id yuangnag.com
}
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 yuangang.net
}
track_script {
check_run
}
virtual_ipaddress {
192.168.45.244
}
}
3)、檢測mysql腳本配置(兩臺(tái)mysql一樣的配置) 代碼示例:
#vim
#!/bin/bash
MYSQL=/usr/local/mysql/bin/mysql
MYSQL_HOST=localhost
MYSQL_USER=root
MYSQL_PASSWORD=
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 -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
加上權(quán)限： 代碼示例:
chmod 755? /root/keepalived_check_mysql.sh
192.168.45.239 keepalived配置 代碼示例:
# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id yuangang.com
}
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 80
advert_int 1
authenti
cation {
auth_type PASS
auth_pass yuangang.com
}
track_script {
check_run
}
virtual_ipaddress {
192.168.45.244
}
}
1.啟動(dòng) 238上的keepalived mysql 代碼示例:
/etc/init.d/keepalived s
tart
/etc/
init.d/mysqld start
2.啟動(dòng)239上的keepalived mysql 代碼示例:
/etc/init.d/keepalived start
/etc/init.d/mysqld start
測試：
關(guān)閉238上的mysql，在另外一臺(tái)機(jī)器上用vip連接mysql。
關(guān)閉239上的mysql，在另外一臺(tái)機(jī)器上用vip連接mysql。
創(chuàng)作挑戰(zhàn)賽新人創(chuàng)作獎(jiǎng)勵(lì)來咯，堅(jiān)持創(chuàng)作打卡瓜分現(xiàn)金大獎(jiǎng)總結(jié)
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