一、准备工作:
下载地址:
http://dl.mycat.org.cn/2.0/install-template/mycat2-install-template-1.21.zip
http://dl.mycat.org.cn/2.0/1.21-release/
下载后文件:
将文件mycat2-install-template-1.21解压,将mycat2-1.21-release-jar-with-dependencies2022-5-5.jar复制放到mycat\lib一份:
二、mycat配置修改
1、mycat配置文件位置:
打开配置prototypeDs.datasource.json文件:
{
"dbType":"mysql",
"idleTimeout":60000,
"initSqls":[],
"initSqlsGetConnection":true,
"instanceType":"READ_WRITE",
"maxCon":1000,
"maxConnectTimeout":3000,
"maxRetryCount":5,
"minCon":1,
// 数据源名称,不用修改
"name":"prototypeDs",
//数据库密码
"password":"lll123",
"type":"JDBC",
//连接master数据库
"url":"jdbc:mysql://localhost:3306/mysql?useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8",
//数据库用户名
"user":"root",
"weight":0
}
mycat启动后,会自行建立mycat库,用来预存mycat需要用到的一些信息。mycat会自行建立,如果建立失败,可以手动先在数据库建立后再启动。
1、启动mycat:
mycat install
mycat start
mycat status
2、登录:登录mycat,默认用户名:root 密码:123456
3、创建逻辑库
在Mycat里创建数据库test_mycat
create database test_mycat;
逻辑库创建成功后,自动生成配置文件。
主库创建了相应的数据库。
打开test_mycat.schema.json文件
{
"customTables":{},
"globalTables":{},
"normalProcedures":{},
"normalTables":{},
//逻辑库名,也是mysql中对应的物理数据库名
"schemaName":"test_mycat",
//集群
"targetName":"mycatCluster",
"shardingTables":{},
"views":{}
}
解释:
customTables 放置的是mycat默认的表的配置
globalTables 放置的是全局表的配置
shardingTables 放置分片表的配置
normalTables 放置普通表的配置
4、配置数据源
在cmd登录mycat或在navicate连接mycat后使用命令行界面输入:
注释命令添加主数据源:
/*+ mycat:createDataSource{ "name" :"mycatWrite" , "url":"jdbc:mysql://localhost:3306/test_mycat?useSSL=false&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true","user":"root","password" :"ldst123"} */;
添加从数据源:
/*+ mycat:createDataSource{ "name" :"mycatRead" , "url":"jdbc:mysql://localhost:3307/test_mycat?useSSL=false&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true","user":"root","password" :"ldst123"} */;
查看主从数据源创建是否成功!
/*+ mycat:showDataSources{} */
成功后生成的主从数据源文件:
mycatWrite:
{
"dbType":"mysql",
"idleTimeout":60000,
"initSqls":[],
"initSqlsGetConnection":true,
"instanceType":"READ_WRITE",
"maxCon":1000,
"maxConnectTimeout":30000,
"maxRetryCount":5,
"minCon":1,
"name":"mycatWrite",
"password":"xxx123",
"queryTimeout":0,
"type":"JDBC",
"url":"jdbc:mysql://localhost:3306/test_mycat?useJDBCCompliantTimezoneShift=true&useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8&autoReconnect=true&useSSL=false",
"user":"root",
"weight":0
}
mycatRead:
{
"dbType":"mysql",
"idleTimeout":60000,
"initSqls":[],
"initSqlsGetConnection":true,
//跟/*+ mycat:showDataSources{} */命令查到的库中属性值不一致?
"instanceType":"READ_WRITE",
"maxCon":1000,
"maxConnectTimeout":30000,
"maxRetryCount":5,
"minCon":1,
"name":"mycatRead",
"password":"xxx123",
"queryTimeout":0,
"type":"JDBC",
"url":"jdbc:mysql://localhost:3307/test_mycat?serverTimezone=Asia/Shanghai&useJDBCCompliantTimezoneShift=true&characterEncoding=UTF-8&useUnicode=true&autoReconnect=true&useSSL=false",
"user":"root",
"weight":0
}
5、创建集群配置信息
/*! mycat:createCluster{"name":"mycatCluster","masters":["mycatWrite"],"replicas":["mycatRead"]} */
查询集群信息:
/*+ mycat:showClusters{} */;
集群创建成功后生成文件:
查看mycatCluster.cluster文件
{
"clusterType":"MASTER_SLAVE",
"heartbeat":{
"heartbeatTimeout":1000,
"maxRetryCount":3,
"minSwitchTimeInterval":300,
"showLog":false,
"slaveThreshold":0.0
},
"masters":[
"mycatWrite"
],
"maxCon":2000,
"name":"mycatCluster",
"readBalanceType":"BALANCE_ALL",
"replicas":[
"mycatRead"
],
"switchType":"SWITCH"
}
6、完成后在mycat中进行操作测试即可。
注意事项:
在cmd登录mycat2在表中插入数据有乱码,登录时可以指明字符集:
在cmd中登录mycat时由使用 mysql -uroot -p这种方式了
改为mysql --default-character-set=utf8 -uroot -p123456 -P8066进行登录***