mysql主从
说明安装环境：ubuntu10/11，mysql 5.1
一，mysql安装
1，查看mysql是否安装
sudo aptitude show mysql-server
sudo aptitude show mysql-client
2，安装
sudo apt-get install [--fix-missing] mysql-server mysql-client
信息如下：
The following extra packages will be installed:
libdbd-mysql-perl libdbi-perl libhtml-template-perl libmysqlclient16 libnet-daemon-perl libplrpc-perl mysql-client-5.1 mysql-client-core-5.1 mysql-common
mysql-server-5.1 mysql-server-core-5.1
Suggested packages:
libipc-sharedcache-perl tinyca mailx
The following NEW packages will be installed:
libdbd-mysql-perl libdbi-perl libhtml-template-perl libmysqlclient16 libnet-daemon-perl libplrpc-perl mysql-client mysql-client-5.1 mysql-client-core-5.1
mysql-common mysql-server mysql-server-5.1 mysql-server-core-5.1
设置root密码
3，配置zqm@ubuntu:~$ sudo vim /etc/mysql/my.cnf
注释掉
#bind-address = 127.0.0.1
修改如下
[client]
default-character-set=utf8
[mysqld]
datadir=/data/mysql
default-character-set=utf8
init_connect='SET NAMES UTF8'
如果修改了datadir，就要相应在文件
/etc/apparmor.d/usr.sbin.mysqld中添加
/data/mysql/ r,
/data/mysql/** rwk,
让修改生效:sudo invoke-rc.d apparmor restart
之后复制原来mysql数据目录的数据到新目录
sudo cp -r /var/lib/mysql /data/
修改属主
sudo chown -R mysql:mysql /data/mysql
启动mysql
sudo service mysql start
二，mysql主从
1，授权
GRANT REPLICATION SLAVE ON *.* TO 'slave001'@'192.168.131.129' identified by "slavepass";
2，修改主配置
server-id = 1
log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 7
max_binlog_size = 100M
binlog_do_db = dbname
3，记录主库状态
show master status;
show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000001 | 106 | zqm | |
+------------------+----------+--------------+------------------+
4,配置从库
sudo vim /etc/mysql/my.cnf
server-id=2
5，重启从库
sudo service mysql restart
6，登陆mysql，执行chang master
mysql -uroot -p
执行：
change master to master_host='192.168.131.128',master_user='slave001',master_password='slavepass',master_log_file='mysql-bin.000001',master_log_pos=106;
正确执行后
start slave
7，查看slave状态
show slave status \G;
备注，如果发现chang mater设置错了master的ip，可以先stop slave，之后再chang master，再start slave
三，主从复制中的错误处理
1，主键重复插入错误
Last_SQL_Errno: 1062
Last_SQL_Error: Error 'Duplicate entry '6' for key 'PRIMARY'' on query. Default database: 'fabu'. Query: 'insert into t values (6,'f')'
处理方案：跳过此条插入sql
slave stop;
set global SQL_slave_SKIP_COUNTER=1;
slave start;
四. 查看mysql加那个配置文件
1.ps -ef |grep mysql 不行就用2的方法
2. strace -eopen mysqld