Mysql集群搭建1-linux上Mysql的安装与配置
1.Mysql集群的原理
通过访问虚拟ip值，在主keepalived没有宕机的情况下访问主keepalived的值对应的mysql,主keepalived宕机的情况下访问从keepalived对应的mysql.两个服务器通过虚拟ip关联.
2.Linux上Mysql的安装
1、配置YUM源
1.yum源配置
yum install -y
https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm
查看安装yum源成功
yum repolist enabled | grep "mysql.*-community.*"
可以修改
vim /etc/yum.repos.d/mysql-community.repo
源，改变默认安装的mysql版本。比如要安装5.6版本，将5.7源的enabled=1改 成 enabled=0。然后再将5.6源的enabled=0改成enabled=1即可。改完之后的效果如下所示：
2、安装MySQL
shell> yum install mysql-community-server
3、启动MySQL服务
shell> systemctl start mysqld
查看MySQL的启动状态
shell> systemctl status mysqld● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled) Active: active (running) since 五 2016-06-24 04:37:37 CST; 35min ago Main PID: 2888 (mysqld) CGroup: /system.slice/mysqld.service └─2888 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
6月 24 04:37:36 localhost.localdomain systemd[1]: Starting MySQL Server... ----启动成功
6月 24 04:37:37 localhost.localdomain systemd[1]: Started MySQL Server. ----启动成功
4、修改root本地登录密码
mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码，然后登录mysql进行修改：
shell> grep 'temporary password' /var/log/mysqld.log
shell> mysql -uroot -p默认密码mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
修改配置文件exit
vi /
etc/my.cnf
datadir=/home/mysql/mysqldate
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
slow_query_log = on
slow-query-log-file = /var/log/slow.log
long_query_time=5
skip-name-resolve
innodb_file_per_table = 1
innodb_buffer_pool_size = 10G
innodb_log_file_size = 256M
max_connections = 2000
//mysql服务的id，不可重复
server_id = 2
log-bin = mysql-bin
binlog_format = mixed
read-only = 0
relay_log = /home/mysql/mysqlbinlog/mysql-relay-bin 作为同步作用的文件夹，必须手动创建，修改权限
log-slave-updates = on
auto-increment-offset=2 序列自增规则必须一个奇数一个偶数
auto-increment-increment=2 序列自增规则必须一个奇数一个偶数
4、添加同步账号
添加主从同步账户:
mysql
>
grant
replication
slave
on
*
.
*
to
'repl'
@
'192.168.10.12'
identified
by
'123456'
;
mysql
>
flush
privileges
;
查看主库的状态：
mysql
>
show master status;
配置同步信息:
mysql
>
change master
to
master_host
=
'192.168.10.12'
,master_port
=
3306
,master_user
=
'repl'
,master_password
=
'123456'
,master_log_file
=
'mysql-bin.000003'
,master_log_pos
=
437
;
查看主从配置信息:
mysql
>
start slave;mysql
>
show slave status\G;
显示如下状态则正常:
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
为了避免出错可以将两个数据库 的密码设置的一致
出现的错误:
1.1045 错误码
1.找不到服务 在配置文件内添加 skip-name-resolve 以此跳过域名和DNS解析
错误原因:
2.1236 错误码
Got fatal error 1236 from master when reading data from binary log: 'Client requested master to start replication from impossible position; the first event 'mysql-bin.000011' at 424, the last event read from './mysql-bin.000011' at 4, the last byte read f
解决办法：
在主库中查找：
/usr/local/mysql/bin/mysqlbinlog --start-position=144001931 /data/mysql/mysql-bin.001501
/*!40010 SET @@session.max_insert_delayed_threads=0*/;
/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/;
DELIMITER /*!*/;
# at 40019 --真正的开始位置
#130629 12:00:50 server id 2 end_log_pos 107 Start: binlog v 4, server v 5.5.15-log created 130629 12:00:50
# Warning: this binlog is either in use or was not closed properly.
BINLOG '
8lvOUQ8CAAAAZwAAAGsAAAABAAQANS41LjE1LWxvZwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAEzgNAAgAEgAEBAQEEgAAVAAEGggAAAAICAgCAA==
'/*!*/;
DELIMITER ;
# End of log file
ROLLBACK /* added by mysqlbinlog */;
/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/;
然后重新
change master to master_host='192.168.50.35',master_port=3306,master_user='repl',master_password='trsadmin123',master_log_file='mysql-bin.000011',master_log_pos=40019;
必须先reset slave;