1. 卸载已有的mysql
http://www.cnblogs.com/kerrycode/p/4364465.html
1.安装mysql
yum -y install wget
下载 http://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm 或者 https://download.youkuaiyun.com/download/maple980326/12037473 的 rpm文件
粘贴至 maple用户 目录
cd 至 maple用户目录
安装mysql的YUM源:rpm -ivh mysql57-community-release-el7-11.noarch.rpm
检查mysql的YUM源是否安装成功:yum repolist enabled | grep "mysql.*-community.*"
yum install mysql-community-server
systemctl start mysqld
查看默认密码:grep 'temporary password' /var/log/mysqld.log
使用grep 'temporary password' /var/log/mysqld.log找不到root密码
打开mysqld.log中根本没有temporary password
1.删除原来安装过的mysql残留的数据(这一步非常重要,问题就出在这)
rm -rf /var/lib/mysql
2.重启mysqld服务
systemctl restart mysqld
3.再去找临时密码
grep 'temporary password' /var/log/mysqld.log
执行以下命令脚本
set global validate_password_policy=0;set global validate_password_mixed_case_count=0;
set global validate_password_number_count=3;set global validate_password_special_char_count=0;
set global validate_password_length=3;
mysql> set global validate_password_policy=0;
Query OK, 0 rows affected (0.05 sec)
mysql> set global validate_password_mixed_case_count=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_number_count=3;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_special_char_count=0;
Query OK, 0 rows affected (0.00 sec)
mysql> set global validate_password_length=3;
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW VARIABLES LIKE 'validate_password%';
+--------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------+-------+
| validate_password_dictionary_file | |
| validate_password_length | 3 |
| validate_password_mixed_case_count | 0 |
| validate_password_number_count | 3 |
| validate_password_policy | LOW |
| validate_password_special_char_count | 0 |
+--------------------------------------+-------+
6 rows in set (0.00 sec)
4)修改简单密码:
mysql> SET PASSWORD FOR 'root'@'%
' = PASSWORD('123');
Query OK, 0 rows affected, 1 warning (0.00 sec)
grant all on *.* to 'root'@'%' identified by 'root' with grant option;
systemctl restart mysqld;
3. 主从配置
http://www.cnblogs.com/alvin_xp/p/4162249.html
http://www.cnblogs.com/sustudy/p/4174189.html
根据以下教程配置
配置master ,修改 etc 下面的 mysql.conf 文件,添加以下内容
server-id=1
log-bin=master-bin
binlog_checksum=none
log-bin-index=master-bin.index
binlog-do-db=business_maple
binlog-ignore-db=mysql
重启服务:systemctl restart mysqld
执行以下命令,获取 master_log_file 跟 master_log_pos 值
SHOW MASTER STATUS \G
配置 slave :修改 etc 下面的 mysql.conf 文件,添加以下内容
[mysqld]
server-id=2
relay-log-index=slave-relay-bin.index
relay-log=slave-relay-bin
slave-skip-errors=all ps:slave同步数据忽略报错sql,比如主从数据不一致,在不一致的基础上配置主从同步,slave很有可能会报sql错误
重启服务:systemctl restart mysqld
运行 一下代码
change master to master_host='192.168.0.104',master_port=3306,master_user='repl',master_password='mysql', master_log_file='master-bin.000002',master_log_pos=123;
start slave; 或 stop slave;
show slave status\G
SpringMVC 基于注解 配置mysql 读写分离 + 德鲁伊 + mybatis
demo 源码下载地址:
http://download.youkuaiyun.com/download/maple980326/9977130
参考文档
http://www.cnblogs.com/surge/p/3582248.html
application xml 配置
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="false"/>
<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
<bean id="manyDataSourceAspect" class="com.maple.dynamic.DataSourceAspect" />
<aop:config>
<aop:aspect id="c" ref="manyDataSourceAspect" order="1">
<aop:pointcut id="tx" expression="execution(public * com.maple.dao.*.*(..))"/>
<aop:before pointcut-ref="tx" method="before"/>
</aop:aspect>
</aop:config>