centos7 maiadb主从复制搭建

需求：

由于要使用saltstack，部署环境，先手动搭建了下主从环境，发现原来的word资料都找不到了，所以这次赶紧的记录到博客当中！！

环境：

两台设备，ip地址分别为：

node1：192.168.56.11

node2：192.168.56.12

系统：Centos7

软件包：使用系统自带的yum 来安装的mariadb

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安装：

分别在两台设备上安装数据库mariadb，使用yum来安装的，可以更换成过内的yum源来操作

命令：yum install -y mariadb mariadb-server

配置：

先配置node1上的master配置

[root@salt-node1 ~]# vim /etc/my.cnf[mysqld]innodb_file_per_table=NOlog-bin=/var/lib/mysql/master-bin #这里如果不指定路径默认是在datadir下面生成binlog_format=mixedserver-id = 11#这个主节点一定要是唯一的datadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sock# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0# Settings user and group are ignored when systemd is used.# If you need to run mysqld under a different user or group,# customize your systemd unit file for mariadb according to the# instructions in http://fedoraproject.org/wiki/Systemd[mysqld_safe]log-error=/var/log/mariadb/mariadb.logpid-file=/var/run/mariadb/mariadb.pid## include all files from the config directory#!includedir /etc/my.cnf.d

重启node1上的mysql服务

systemctl restart mariadb.service

登录mysql：

mysql -uroot -p我这里测试就没有设置密码

创建帐号并赋予replication的权限。从库,主从库复制数据时需要使用这个帐号进行

grant replication slave on *.* to 'root'@'192.168.56.%' identified by '123456';

加锁：

实际工作中，需要禁止数据库的写入，要给数据库上锁

FLUSH TABLES WITH READ LOCK;

记录主库的binlog日志文件和位置信息（这个信息，要在从库配置的时候用到）

MariaDB [(none)]> show master status;+-------------------+----------+--------------+------------------+| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB |+-------------------+----------+--------------+------------------+| master-bin.000001 |      398 |              |                  |+-------------------+----------+--------------+------------------+1 row in set (0.00 sec)

备份主库的数据：

mysqldump -uroot -p --all-databases > /tmp/db.sql

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下面开始配置从库：

导入数据到从库当中

mysql -uroot -p 
修改配置文件my.cnf：
[root@salt-node2 ~]# cat /etc/my.cnf[mysqld]innodb_file_per_table=NO#log-bin=mysql-binbinlog_format=mixedserver-id = 12relay-log = /var/lib/mysql/relay-bin#log_slave_updates = 1read_only = ondatadir=/var/lib/mysqlsocket=/var/lib/mysql/mysql.sock# Disabling symbolic-links is recommended to prevent assorted security riskssymbolic-links=0# Settings user and group are ignored when systemd is used.# If you need to run mysqld under a different user or group,# customize your systemd unit file for mariadb according to the# instructions in http://fedoraproject.org/wiki/Systemd[mysqld_safe]log-error=/var/log/mariadb/mariadb.logpid-file=/var/run/mariadb/mariadb.pid## include all files from the config directory#!includedir /etc/my.cnf.d
重启服务：
systemctl restart mariadb.service
登录mysql
mysql -uroot -p
设置主从服务配置
CHANGE MASTER TO MASTER_HOST='192.168.56.11',MASTER_USER='root', MASTER_PASSWORD='123456', MASTER_LOG_FILE='master-bin.000001', MASTER_LOG_POS= 398;
开启主从服务：
start slave;
查看从库状态：
MariaDB [(none)]> show slave status\G;*************************** 1. row ***************************               Slave_IO_State: Waiting for master to send event                  Master_Host: 192.168.56.11                  Master_User: root                  Master_Port: 3306                Connect_Retry: 60              Master_Log_File: master-bin.000001          Read_Master_Log_Pos: 485               Relay_Log_File: relay-bin.000002                Relay_Log_Pos: 617        Relay_Master_Log_File: master-bin.000001             Slave_IO_Running: Yes            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: 485              Relay_Log_Space: 905              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: 0Master_SSL_Verify_Server_Cert: No                Last_IO_Errno: 0                Last_IO_Error:                Last_SQL_Errno: 0               Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 111 row in set (0.00 sec)ERROR: No query specified
             Slave_IO_Running: Yes #这里必须为yes，如果不是，需要排查故障            Slave_SQL_Running: Yes #这里必须为yes，如果不是，需要排查故障
主从验证，
#主库创建数据库MariaDB [(none)]> create database jiayou ;Query OK, 1 row affected (0.00 sec)#从库查看是否同步过来这个数据库MariaDB [(none)]> show databases;+--------------------+| Database           |+--------------------+| information_schema || gg                 || jiayou             || kk                 || mysql              || performance_schema || salt               || test               |+--------------------+8 rows in set (0.00 sec)
有时候会有一些故障问题，可以参考下面这个博客，自己懒的写了
http://blog.csdn.net/mingliangniwo/article/details/54606894?locationNum=8&fps=1