mysql 主从复制集群搭建

话说一个正确的文章能敌千钧万马,一句善意的点拨能敌百万雄狮,一个好友的帮助能让你拨开云雾见青天。搭建mysql主从同步,这两天看网上的博客教程很多,当然,错误的文章会误导你很多,我就被误导了。现将这两天的搭建过程详细记录:


前期准备:关闭防火墙

关闭SELINUX

关闭SELINUX

vi /etc/selinux/config

#SELINUX=enforcing #注释掉

#SELINUXTYPE=targeted #注释掉

SELINUX=disabled #增加

:wq  #保存退出

setenforce 0 #立即生效

                                     -------两台机器都要关闭防火墙和selinux

如果一定要开启防火墙的话,建议只需要加入3306端口就行,具体方法见我的另外一个文章(http://caizi.blog.51cto.com/5234706/1536463);

环境:linux虚拟机两台,系统是centos 6.3 64位

                       mysql 版本:5.6.11 linux 64位

两台服务器

主:172.19.0.116     Master116          主(master)

从:172.19.0.117      backup117        从(saver)

两台都要安装mysql如下步骤

安装系统所需要的依赖包

[root@ 116 ~]# yum -y install gcc gcc-c++ gcc-g77 autoconf automake zlib* fiex* libxml* ncurses-devel libmcrypt* libtool-ltdl-devel*  cmake  bison

 

创建mysql用户与用户组

[root@ 116~]# groupadd mysql

[root@ 116~]# useradd -r -g mysql mysql

 

安装mysql

[root@ 116~]# tar zxvf mysql-5.6.11.tar.gz

[root@ 116~]# cd mysql-5.6.11

[root@116 mysql-5.6.11]# cmake -DCMAKE_INSTALL_PREFIX=/opt/mysql/ -DMYSQL_DATADIR=/opt/mysql/data -DMYSQL_UNIX_ADDR=/opt/mysql/data/mysqld.sock -DWITH_INNOBASE_STORAGE_ENGINE=1  -DENABLED_LOCAL_INFILE=1 -DMYSQL_TCP_PORT=3306 -DEXTRA_CHARSETS=all -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DMYSQL_UNIX_ADDR=/opt/mysql/data/mysql.sock -DMYSQL_USER=mysql  -DWITH_DEBUG=0

 

[root@ 116   mysql-5.6.11]# make && make install

 

赋予相关权限

[root@ 116 mysql-5.6.11]# chown -R mysql:mysql /opt/mysql

 

 

[root@116 mysql-5.6.11]#  /opt/mysql/scripts/mysql_install_db --user=mysql --basedir=/opt/mysql   --datadir=/opt/mysql/data

 

mysql配置文件

[root@ 116  mysql-5.6.11]# cp /opt/mysql/support-files/my-default.cnf /etc/my.cnf     ----部分文章有误,因为    版本不同

[root@116 mysql-5.6.11]# cp /opt/mysql/support-files/mysql.server /etc/init.d/mysql

[root@116 mysql-5.6.11]# chmod +x /etc/init.d/mysql

 

增加自动启动

[root@116 mysql-5.6.11]# chkconfig mysql on

 

启动mysql

[root@116  mysql-5.6.11]# /etc/init.d/mysql start

Starting MySQL......                                       [  OK  ]

 

查看mysql 3306端口,看到下面说明启动成功

[root@Master120 mysql-5.5.25]#ps aux | grep 3306

mysql    17237  3.6  8.4 615660 86264 pts/2    Sl   22:10   0:01 /opt/mysql/bin/mysqld --basedir=/opt/mysql

 

 

设置mysql初始密码,123456是密码,你可以设置自己需要的密码

[root@116 mysql-5.6.11]# /opt/mysql/bin/mysqladmin -u root password ‘123456‘

 

 

[root@116  mysql-5.6.11]# /opt/mysql/bin/mysql -uroot -p123456

Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.6.11 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show master status;
Empty set (0.01 sec)
                ----红色为系统显示

mysql>


主从复制的配置

主的my.cnfserver-id=1,每个同步服务都必须设定一个唯一的编号。

show variables like ‘server_id‘;  #查看server-id的值是否为1

mysql> show variables like ‘server_id‘;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     | 1     |
+---------------+-------+
1 row in set (0.02 sec)

mysql>

Master(这里为116机器)上增加一个用于复制的账号:

mysql>GRANT REPLICATION SLAVE ON *.*  TO ‘repl‘@‘172.19.0.%‘  IDENTIFIED BY ‘123456‘;

mysql>flush privileges;     --这个地方注意:有的帖子写的是(mysql>FLUSH REPLICATION;)报错

mysql> show master status;           - --- 这里没显示不知道为啥




设置Slave 主机

修改my.cnfserver-id,内容如下:

backup117主机

server-id=2

show variables like ‘server_id‘;  #查看server-id的值是否为2

mysql> show variables like ‘server_id‘;
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     |2     |
+---------------+-------+
1 row in set (0.02 sec)

mysql>



开启MasterSlave的同步

Slave上执行如下命令

mysql>CHANGE MASTER TO MASTER_HOST=‘172.19.0.116‘,

         ->MASTER_USER=‘repl‘,

         ->MASTER_PASSWORD=‘123456‘,

         ->MASTER_LOG_FILE=‘mysql-bin.000001‘,

         ->MASTER_LOG_POS=245;

 之后执行                             ----这个地方执行是一个块,我卡这里了

 mysql>start slave;      ###开启服务器线程                     ----(不是其他文章里面的slave start;执行slave start;会报错的)


 mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State:
                  Master_Host: 172.19.0.116
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 245
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: No                                                 ----这个有问题
            Slave_SQL_Running: Yes

              Replicate_Do_DB:
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 245
              Relay_Log_Space: 120
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: NULL
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 1236
                Last_IO_Error: Got fatal error 1236 from master when reading data from binary log: ‘Binary log is not open‘
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1
                  Master_UUID: 4728455b-16cf-11e4-9cee-000c298ac0cb
             Master_Info_File: /opt/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp: 140729 12:30:56
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set:
            Executed_Gtid_Set:
                Auto_Position: 0
1 row in set (0.00 sec)


上面还是有点问题,没有找到问题所在,今后如果有解决的话再做补充!

本文出自 “ghost” 博客,请务必保留此出处http://caizi.blog.51cto.com/5234706/1536468

mysql 主从复制集群搭建,古老的榕树,5-wow.com

郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。