服务器规划：
mysql1：192.168.2.153
mysql2：192.168.2.154
mysql-vip：192.168.2.157
主主复制：
- 创建复制账号：
主库：mysql> grant replication slave on . to repl@'192.168.2.%' identified by 'slave';
备库：mysql> grant replication slave on . to repl@'192.168.2.%' identified by 'slave'; - 配置主库和备库:修改my.cnf
#mysql1
[mysqld]
server-id = 26
port = 3306
user = mysql
basedir = /mvtech/mysql
datadir = /mvtech/mysql/data
tmpdir = /mvtech/mysql/
socket = /mvtech/mysql/mysql.sock
skip-external-locking
skip-name-resolve
lower_case_table_names=1
auto_increment_offset = 1
auto_increment_increment = 2
########## binlog ##########
log_bin = /mvtech/mysql/log/mysql-bin
binlog_format = row
binlog_cache_size = 2M
expire-logs-days = 7
########## error log ##########
log_error = /mvtech/mysql/log/mysql-error.log
########## slow log ##########
slow_query_log = 1
slow_query_log_file = /mvtech/mysql/log/mysql-slow.log
long_query_time = 5
########## per_thread_buffers ##########
max_connections = 1024
max_connect_errors = 1000
key_buffer_size = 64M
max_allowed_packet = 128M
table_open_cache = 6144
table_definition_cache = 4096
sort_buffer_size = 512K
read_buffer_size = 512K
join_buffer_size = 512K
tmp_table_size = 64M
max_heap_table_size = 64M
thread_cache_size = 64
thread_concurrency = 32
bulk_insert_buffer_size = 64M
########innodb########
innodb_data_file_path = ibdata1:76M;ibdata2:1G:autoextend
innodb_buffer_pool_size = 30G
innodb_log_file_size = 500M
innodb_log_buffer_size = 64M
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table = 1
innodb_file_io_threads = 4
innodb_flush_method = O_DIRECT
innodb_thread_concurrency = 0
innodb_additional_mem_pool_size = 16M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open_files_limit = 65535
mysql
#mysql2：
[mysqld]
server-id = 27
port = 3306
user = mysql
basedir = /mvtech/mysql
datadir = /mvtech/mysql/data
tmpdir = /mvtech/mysql/
socket = /mvtech/mysql/mysql.sock
skip-external-locking
skip-name-resolve
lower_case_table_names=1
auto_increment_offset = 2
auto_increment_increment = 2
########## binlog ##########
log_bin = /mvtech/mysql/log/mysql-bin
binlog_format = row
binlog_cache_size = 2M
expire-logs-days = 7
########## error log ##########
log_error = /mvtech/mysql/log/mysql-error.log
########## slow log ##########
slow_query_log = 1
slow_query_log_file = /mvtech/mysql/log/mysql-slow.log
long_query_time = 5
########## per_thread_buffers ##########
max_connections = 1024
max_connect_errors = 1000
key_buffer_size = 64M
max_allowed_packet = 128M
table_open_cache = 6144
table_definition_cache = 4096
sort_buffer_size = 512K
read_buffer_size = 512K
join_buffer_size = 512K
tmp_table_size = 64M
max_heap_table_size = 64M
thread_cache_size = 64
thread_concurrency = 32
bulk_insert_buffer_size = 64M
########innodb########
innodb_data_file_path = ibdata1:76M;ibdata2:1G:autoextend
innodb_buffer_pool_size = 30G
innodb_log_file_size = 500M
innodb_log_buffer_size = 64M
innodb_flush_log_at_trx_commit = 2
innodb_file_per_table = 1
innodb_file_io_threads = 4
innodb_flush_method = O_DIRECT
innodb_thread_concurrency = 0
innodb_additional_mem_pool_size = 16M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open_files_limit = 65535
* 复制配置
登陆mysql1：查看show binary logs;
mysql2上操作：根据查询结果修改下面语句mysql2上操作：
CHANGE MASTER TO MASTER_HOST='192.168.2.153',
MASTER_USER='repl',
MASTER_PASSWORD='slave',
MASTER_LOG_FILE='mysql-bin.000006',
MASTER_LOG_POS=0;
查看状态：show slave statusG
Slave_IO_Running: No
Slave_SQL_Running: No
启动slave
start slave
查看mysql2状态：show slave statusG
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
查看mysql2线程：
show processlistG
登陆mysql2：
查看show binary logs;
mysql> show binary logs;
+------------------+-----------+
| Log_name | File_size |
+------------------+-----------+
| mysql-bin.000001 | 143 |
| mysql-bin.000002 | 229383637 |
| mysql-bin.000003 | 120 |
+------------------+-----------+
3 rows in set (0.00 sec)
mysql1操作：
CHANGE MASTER TO MASTER_HOST='192.168.2.154',
MASTER_USER='repl',
MASTER_PASSWORD='slave',
MASTER_LOG_FILE='mysql-bin.000003',
MASTER_LOG_POS=120;
启动slave
start slave
查看mysql1状态：show slave statusG
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
查看mysql1线程：
show processlistG
keepalived配置：
* mysql1：keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface em1
virtual_router_id 61
priority 100
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.157
}
}
virtual_server 192.168.2.157 3306 {
delay_loop 2
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.2.153 3306 {
weight 3
notify_down /mvtech/mysql/keepalive-mysql.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
* mysql2：keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state BACKUP
interface em1
virtual_router_id 61
priority 90
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.2.157
}
}
virtual_server 192.168.2.157 3306 {
delay_loop 2
lb_algo wrr
lb_kind DR
nat_mask 255.255.255.0
persistence_timeout 50
protocol TCP
real_server 192.168.2.154 3306 {
weight 3
notify_down /mvtech/mysql/keepalive-mysql.sh
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
#keepalive-mysql.sh
#!/usr/bin/env bash
service keepalived stop
服务启动
- 启动
1.启动mysql1上的mysql；登陆查看mysql-slave状态:show slave statusG；启动slave:start slave;
2.启动mysql2上的mysql；登陆查看mysql-slave状态:show slave statusG;启动slave:start slave;
3.启动mysql1上的keepalived；查看vip状态：ip addr
4.启动mysql2上的keepalived。 - 关闭
1.查看vip漂在那台机器上，例如：在mysql1上；
2.关闭mysql2的keepalived；
3.关闭mysql1的keepalived；
4.关闭mysql1上的mysql；
5.关闭mysql2上的mysql。
keepalived模拟切换
- 关闭mysql1上的mysql，vip漂至mysql2主机上；
- 启动mysql1上的mysql同时启动keepalived，vip不漂回mysql1主机上，这是由于keepalive.conf 配置文件中将两台机器都设为backup，并增加nopreempt，此模式为不抢占模式。避免高并发网站频繁切换造成数据库数据不一致问题。
mysql主主复制测试
mysql1和mysql2上均新建数据库，检查同步现象
取消主主复制
mysql> show slave statusG
mysql> stop slave IO_THREAD;
mysql> stop slave;
mysql> reset master;
mysql> show slave statusG
mysql> reset slave all;