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* docker mysql
这里未使用binlog方式,使用的是GTID方式 本机访问 请安装 mysql client yum install mysql -y #client mysql -uroot -p -h127.0.0.1
* mycat
前提:mycat安装前需先实现主从复
** mycat ins
wget -c http://dl.mycat.io/1.6-RELEASE/Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz tar xvf Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz mv mycat/ /home/apps/ groupadd mycat adduser -r -g mycat mycat chown -R mycat.mycat /home/apps/mycat #//修改mycat目录所属mycat用户 echo 'export PATH=/home/apps/mycat/bin/:$PATH' >> /etc/profile && source /etc/profile #大小写不敏感 ? 这个我不打开 修改配置文件my.cnf,必须要修改才能使用mycat 最后一行添加 lower_case_table_names = 1 会自己创建logs目录了 不用手工的
** MyCat配置详解
目录 bin:命令文件 catlet:空的,扩展 conf:配置文件(server.xml,schema.xml,rule.xml等) lib:依赖的jar包 主要的配置文件设计有几个: schema.xml: 主要配置逻辑库、分片表、分片节点和节点主机等信息; server.xml: MyCat系统参数的配置文件; sequence: 全局序列的配置文件; log4j.xml:MyCat日志输出配置文件; rule.xml: MyCat分片规则相关配置文件;
** firewall
firewall-cmd --permanent --add-port=8066/tcpfirewall-cmd --permanent --add-port=8066/tcp
** config
*** 修改配置文件 mycat/conf/schema.xml
NOTE server.xm schemas 和 schema.xml 的schemas name要一样 不然起不来的 这里配置mysql的地址、用户名和密码 事先创建三个库 im_config im_admin im_wallet cat schema.xml <?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="im_config" checkSQLschema="true" sqlMaxLimit="100" dataNode="dn1"></schema> <schema name="im_admin" checkSQLschema="true" sqlMaxLimit="100" dataNode="dn2"></schema> <schema name="im_wallet" checkSQLschema="true" sqlMaxLimit="100" dataNode="dn3"></schema> <!-- 设置dataNode 对应的数据库,及 mycat 连接的地址dataHost --> <dataNode name="dn1" dataHost="node1" database="im_config" /> <dataNode name="dn2" dataHost="node1" database="im_admin" /> <dataNode name="dn3" dataHost="node1" database="im_wallet" /> <!-- mycat 逻辑主机dataHost对应的物理主机.其中也设置对应的mysql登陆信息 --> <dataHost name="node1" maxCon="10667" minCon="500" balance="0" writeType="0" dbType="mysql" dbDriver="native" switchType="1"> <heartbeat>select user()</heartbeat> <writeHost host="master" url="192.168.10.211:3306" user="appuse" password="2pm5566"> <readHost host="slave" url="192.168.10.212:3306" user="appuse" password="2pm556" /> </writeHost> </dataHost> </mycat:schema>
*** server.xml
这里配置mycat的用户名密码 note 最好是 root 和普通用户的 schemas 同一个 我这里是 im_config 用户可访问的逻辑数据库 放在开关 system 标签之后 不然mycat运行不起来 <property name="charset">utf8mb4</property> <property name="charset">utf8mb4</property> cat server.xml <?xml version="1.0" encoding="UTF-8"?> <!-- - - Licensed under the Apache License, Version 2.0 (the "License"); - you may not use this file except in compliance with the License. - You may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 - - Unless required by applicable law or agreed to in writing, software - distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the License for the specific language governing permissions and - limitations under the License. --> <!DOCTYPE mycat:server SYSTEM "server.dtd"> <mycat:server xmlns:mycat="http://io.mycat/"> <system> <property name="charset">utf8mb4</property> <!-- add by evan --> <property name="useSqlStat">0</property> <!-- 1为开启实时统计、0为关闭 --> <property name="useGlobleTableCheck">0</property> <!-- 1为开启全加班一致性检测、0为关闭 --> <property name="sequnceHandlerType">2</property> <!-- <property name="useCompression">1</property>--> <!--1为开启mysql压缩协议--> <!-- <property name="fakeMySQLVersion">5.6.20</property>--> <!--设置模拟的MySQL版本号--> <!-- <property name="processorBufferChunk">40960</property> --> <!-- <property name="processors">1</property> <property name="processorExecutor">32</property> --> <!--默认为type 0: DirectByteBufferPool | type 1 ByteBufferArena--> <property name="processorBufferPoolType">0</property> <!--默认是65535 64K 用于sql解析时最大文本长度 --> <!--<property name="maxStringLiteralLength">65535</property>--> <!--<property name="sequnceHandlerType">0</property>--> <!--<property name="backSocketNoDelay">1</property>--> <!--<property name="frontSocketNoDelay">1</property>--> <!--<property name="processorExecutor">16</property>--> <!-- <property name="serverPort">8066</property> <property name="managerPort">9066</property> <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> --> <!--分布式事务开关,0为不过滤分布式事务,1为过滤分布式事务(如果分布式事务内只涉及全局表,则不过滤),2为不过滤分布式事务,但是记录分布式事务日志--> <property name="handleDistributedTransactions">0</property> <!-- off heap for merge/order/group/limit 1开启 0关闭 --> <property name="useOffHeapForMerge">1</property> <!-- 单位为m --> <property name="memoryPageSize">1m</property> <!-- 单位为k --> <property name="spillsFileBufferSize">1k</property> <property name="useStreamOutput">0</property> <!-- 单位为m --> <property name="systemReserveMemorySize">384m</property> <!--是否采用zookeeper协调切换 --> <property name="useZKSwitch">true</property> </system> <!-- 全局SQL防火墙设置 --> <!-- <firewall> <whitehost> <host host="127.0.0.1" user="mycat"/> <host host="127.0.0.2" user="mycat"/> </whitehost> <blacklist check="false"> </blacklist> </firewall> --> <user name="root"> <property name="password">123456</property> <property name="schemas">im_config</property> <!-- add by evan--> <!-- 表级 DML 权限设置 --> <!-- <privileges check="false"> <schema name="TESTDB" dml="0110" > <table name="tb01" dml="0000"></table> <table name="tb02" dml="1111"></table> </schema> </privileges> --> </user> <!-- add by evan --> <user name="appuse"> <property name="password">2pm5566</property> <property name="schemas">im_config,im_admin,im_wallet</property> </user> </mycat:server>
*** grant
grant all privileges on *.* to 'appuse'@'192.168.10.*' IDENTIFIED BY '2pm5566'; '192.168.10.*' 这个写法有问题的 要不就直接 % #以后授权用下面这个 精准些 grant all privileges on *.* to 'aaaa'@'10.3.101.2' IDENTIFIED BY '66666';
*** mycat test
本地访问 就可以看到上面的三个库了 mysql -uappuse -p2pm5566 -h127.0.0.1 -P8066 远程访问 mysql -uappuse -p2pm5566 -h192.168.10.211 -P8066
*** troubleshooting
重启mycat 得重连 mysql> show databases; ERROR 2013 (HY000): Lost connection to MySQL server during query 关闭主mysql mycat 还是可以 show databases 等等 查 #这些操作主库得在 也就 wirte host mysql> use im_admin; Database changed mysql> show tables; ERROR 1184 (HY000): Connection refused mysql> create table t1(name varchar(20),fa char(1)); ERROR 1184 (HY000): Connection refused mysql> insert into t1 values("e","m"); ERROR 1184 (HY000): Connection refused 关闭从 依然可以查看 show tablesStart services 除非你readonly ?
see also
http://www.mycat.io/document/mycat-definitive-guide.pdf 书下载