實驗架構： master 192.168.0.92 mysql slave 192.168.0.93 mysql mycat 192.168.0.94 mycat jdk angent 192.168.0.95 mysql 1、環境配置 參照：https://www.cnblogs.com/effortsing/p/10367025.html 2、配置mysql實現主從復制 參照: https://www.cnblogs.com/effortsing/p/10367257.html 3、安裝jdk 參照：https://www.cnblogs.com/effortsing/p/10012211.html 4、安裝mycat實現讀寫分離 tar zxf Mycat-server-1.6-RELEASE-20161028204710-sangnux.tar.gz -C /usr/local cat>>/etc/profile<<EOF export MYCAT_HOME=/usr/local/mycat export PATH=$PATH:/usr/local/mycat/bin EOF source /etc/profile 5、新建邏輯庫，邏輯表； Mycat默認配置了邏輯庫TESTDB，這里配置一個邏輯庫USERDB 修改schema.xml [root@db4 ~]# vi /usr/local/mycat/conf/schema.xml <?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="TESTDB" dataNode="dn1" checkSQLschema="false" sqlMaxsangmit="100"> <!-- auto sharding by id (long) --> <table name="travelrecord" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" /> <!-- global table is auto cloned to all defined data nodes ,so can join with any table whose sharding node is in the same data node --> <table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /> <table name="goods" primaryKey="ID" type="global" dataNode="dn1,dn2" /> <!-- random sharding using mod sharind rule --> <table name="hotnews" primaryKey="ID" autoIncrement="true" dataNode="dn1,dn2,dn3" rule="mod-long" /> <!-- <table name="dual" primaryKey="ID" dataNode="dnx,dnoracle2" type="global" needAddsangmit="false"/> <table name="worker" primaryKey="ID" dataNode="jdbc_dn1,jdbc_dn2,jdbc_dn3" rule="mod-long" /> --> <table name="tb1" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile" /> <table name="customer" primaryKey="ID" dataNode="dn1,dn2" rule="sharding-by-intfile"> <childTable name="orders" primaryKey="ID" joinKey="customer_id" parentKey="id"> <childTable name="order_items" joinKey="order_id" parentKey="id" /> </childTable> <childTable name="customer_addr" primaryKey="ID" joinKey="customer_id" parentKey="id" /> </table> <!-- <table name="oc_call" primaryKey="ID" dataNode="dn1$0-743" rule="latest-month-calldate" /> --> </schema> <schema name="USERDB" checkSQLschema="false" sqlMaxsangmit="100"> #新增邏輯庫USERDB <table name="tb1" dataNode="dn1,dn2,dn3" rule="auto-sharding-long"></table> #新增邏輯表tb1；這個rule規則表示一直往一個節點上寫數據 </schema> <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743" /> --> <dataNode name="dn1" dataHost="localhost1" database="db1" /> #配置邏輯庫和物理庫對應關系，這里的database改成真實數據庫名db1 <dataNode name="dn2" dataHost="localhost1" database="db2" /> #配置邏輯庫和物理庫對應關系，這里的database改成真實數據庫名db2 <dataNode name="dn3" dataHost="localhost1" database="db3" /> #配置邏輯庫和物理庫對應關系，這里的database改成真實數據庫名db3 <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" /> <dataNode name="jdbc_dn1" dataHost="jdbchost" database="test1" /> <dataNode name="jdbc_dn2" dataHost="jdbchost" database="test2" /> <dataNode name="jdbc_dn3" dataHost="jdbchost" database="test3" /> --> 6、創建物理庫 在mysql里創建dn1,dn2,dn3對應的數據庫： mysql> create database db1; Query OK, 1 rowaffected (0.00 sec) mysql> create database db2; Query OK, 1 rowaffected (0.01 sec) mysql> create database db3; Query OK, 1 rowaffected (0.00 sec) 7、設置用戶對應的邏輯庫 打開文件，搜索password定位修改 vi /usr/local/mycat/conf/server.xml <user name="root"> #改成登錄mysql的用戶名 <property name="password">jenkins@123</property> #這里的用戶名密碼是要訪問的mysql的用戶名密碼 <property name="schemas">USERDB</property> #改成輯庫USERDB <!-- 表級 DML 權限設置 --> <!-- <privileges check="false"> <schema name="USERDB" dml="1111" > # 輯庫USERDB；權限改成1111 <table name="tb01" dml="1111"></table> # 表名不動；權限改成1111 <table name="tb02" dml="1111"></table> # 表名不動；權限改成1111，表示具有增、刪、改、查權限，0000表示沒有權限 </schema> </privileges> --> </user> <user name="user"> <property name="password">user</property> <property name="schemas">TESTDB</property> 8、配置rule.xml文件 搜索 count 進行定位修改 vi /usr/local/mycat/conf/rule.xml <function name="murmur" class="io.mycat.route.function.PartitionByMurmurHash"> <property name="seed">0</property><!-- 默認是0 --> <property name="count">3</property><!-- 要分片的數據庫節點數量，必須指定，否則沒法分片 --> # 這里修改成3，因為有三個數據庫節點數量：dataNode <property name="virtualBucketTimes">160</property><!-- 一個實際的數據庫節點被映射為這么多虛擬節點，默認是160倍，也就>是虛擬節點數是物理節點數的160倍 --> 9、啟動mycat mycat start [root@db4 ~]# mycat start Starting Mycat-server... 查看mycat狀態 mycat status [root@db4 ~]# mycat status Mycat-server is running (3646). 停止mycat mycat stop [root@db4 ~]# mycat stop Stopping Mycat-server... Stopped Mycat-server. 10、查看報錯日志: cat /usr/local/mycat/logs/wrapper.log 查看端口 [root@db4 ~]# netstat -tnlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 192.168.0.94:32000 0.0.0.0:* sangSTEN 3648/java tcp 0 0 0.0.0.0:22 0.0.0.0:* sangSTEN 938/sshd tcp6 0 0 :::1984 :::* sangSTEN 3648/java tcp6 0 0 :::8066 :::* sangSTEN 3648/java # mycat登錄端口 tcp6 0 0 :::34727 :::* sangSTEN 3648/java tcp6 0 0 :::9066 :::* sangSTEN 3648/java # 管理端口 tcp6 0 0 :::44438 :::* sangSTEN 3648/java tcp6 0 0 :::22 :::* sangSTEN 938/sshd 11、分片測試 連接mycat mysql -h 192.168.0.94 -P 8066 -uroot -pjenkins@123 -DUSERDB mysql> show tables; +------------------+ | Tables in USERDB | +------------------+ | tb1 | +------------------+ 1 row in set (0.02 sec) mysql> select * from tb1; ERROR 1105 (HY000): Table 'db2.tb1' doesn't exist 報錯是因為我們還沒有創建該表 mysql> explain create table tb1(id int,name varchar(40),deptno int); +-----------+------------------------------------------------------+ | DATA_NODE | SQL | +-----------+------------------------------------------------------+ | dn1 | create table tb1(id int,name varchar(40),deptno int) | | dn2 | create table tb1(id int,name varchar(40),deptno int) | | dn3 | create table tb1(id int,name varchar(40),deptno int) | +-----------+------------------------------------------------------+ 3 rows in set (0.03 sec) 看到會分配到dn1,dn2,dn3里 mysql> create table tb1(id int,name varchar(40),deptno int); Query OK, 0 rows affected (0.34 sec) 進mysql主節點里可以看到新建的表了，如下： mysql> use db1; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> show tables; +---------------+ | Tables_in_db1 | +---------------+ | tb1 | +---------------+ 1 row in set (0.00 sec) #准備測試數據 連接mycat，插入數據 先查看下會插入到哪個節點： mysql> explain insert into tb1(id,name,deptno)values(1,'jan',10),(2,'bill',20),(3,'sang',30),(4,'gang',20),(5,'hp',10)); +-----------+--------------------------------------------------------------------------------------------------------------------------------+ | DATA_NODE | SQL | +-----------+--------------------------------------------------------------------------------------------------------------------------------+ | dn1 | INSERT INTO tb1 (id, name, deptno) VALUES (1, 'jan', 10), (2, 'bill', 20), (3, 'sang', 30), (4, 'gang', 20), (5, 'hp', 10) | +-----------+--------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.02 sec) mysql> insert into tb1(id,name,deptno)values(1,'jan',10),(2,'bill',20),(3,'sang',30),(4,'gang',20),(5,'hp',10)); Query OK, 5 rows affected (0.03 sec) Records: 5 Dupsangcates: 0 Warnings: 0 進mysql主節點驗證： mysql> select * from db1.tb1; +------+------+--------+ | id | name | deptno | +------+------+--------+ | 1 | jan | 10 | | 2 | bill | 20 | | 3 | sang | 30 | | 4 | gang | 20 | | 5 | hp | 10 | +------+------+--------+ 5 rows in set (0.00 sec) 12、驗證讀寫分離 登錄管理端口 mysql -h 192.168.0.94 -P 9066 -uroot -pjenkins@123 -DUSERDB mysql> show @@datasource ; +----------+--------+-------+--------------+------+------+--------+------+------+---------+-----------+------------+ | DATANODE | NAME | TYPE | HOST | PORT | W/R | ACTIVE | IDLE | SIZE | EXECUTE | READ_LOAD | WRITE_LOAD | +----------+--------+-------+--------------+------+------+--------+------+------+---------+-----------+------------+ | dn1 | hostM1 | mysql | 192.168.0.92 | 3306 | W | 0 | 12 | 1000 | 48 | 0 | 0 | | dn1 | hostS1 | mysql | localhost | 3316 | W | 0 | 0 | 1000 | 0 | 0 | 0 | | dn1 | hostS2 | mysql | 192.168.0.93 | 3306 | R | 0 | 5 | 1000 | 41 | 0 | 0 | | dn3 | hostM1 | mysql | 192.168.0.92 | 3306 | W | 0 | 12 | 1000 | 48 | 0 | 0 | | dn3 | hostS1 | mysql | localhost | 3316 | W | 0 | 0 | 1000 | 0 | 0 | 0 | | dn3 | hostS2 | mysql | 192.168.0.93 | 3306 | R | 0 | 5 | 1000 | 41 | 0 | 0 | | dn2 | hostM1 | mysql | 192.168.0.92 | 3306 | W | 0 | 12 | 1000 | 48 | 0 | 0 | | dn2 | hostS1 | mysql | localhost | 3316 | W | 0 | 0 | 1000 | 0 | 0 | 0 | | dn2 | hostS2 | mysql | 192.168.0.93 | 3306 | R | 0 | 5 | 1000 | 41 | 0 | 0 | +----------+--------+-------+--------------+------+------+--------+------+------+---------+-----------+------------+ 9 rows in set (0.01 sec) 從管理端口觀察兩主機負載變化，發現READ_LOAD在hostS1為2， WRITE_LOAD在hostM1為2，說明讀寫分離已經實現 在mycat里創建用戶（沒做成） 修改MYCAT_HOME/conf/server.xml文件 仿照test用戶創建一個新用戶mycat： 修改后如下： <user name="jenkins"> <property name="password">jenkins@123</property> <property name="schemas">TESTDB</property> <property name="readOnly">true</property> </user> 登錄9066端口，使得配置生效： mysql -h 192.168.0.94 -P 9066 -uroot -pjenkins@123 -DUSERDB mysql> reload @@config_all; ERROR 1003 (HY000): Reload config failure 13、mycat的分片join（都沒做成） Mycat目前版本支持跨分片的join,主要實現方式有四種。 全局表，ER分片，catletT(人工智能)和ShareJoin，ShareJoin在開發版中支持，前面三種斱方式1.3.0.1支持 13.1、 全局表 一個真實的業務系統中，往往存在多量的類似字典表的表格，這些表基本上很少變動， 配置： 全局表配置比較簡單，不用寫Rule規則，如下配置即可： <table name="company" primaryKey="ID" type="global" dataNode="dn1,dn2,dn3" /> 在USERDB下配置一個全局表province: vi /usr/local/mycat/conf/schema.xml 添加： <table name="province" dataNode="dn1,dn2,dn3" type="global"></table> 登陸9066端口，執行命令：reload @@config_all; mysql -h 192.168.0.94 -P 9066 -uroot -pjenkins@123 -DUSERDB 建表： mysql -uroot -pjenkins@123 -h192.168.0.94 -P8066 -DUSERDB mysql> create table province(id int,name varchar(30)); Query OK, 0 rows affected (0.19 sec) mysql> insert into province(id,name)values(1,'tianjin'); Query OK, 3 rows affected (0.11 sec) mysql> select * from province sangmit 1; +------+---------+ | id | name | +------+---------+ | 1 | tianjin | +------+---------+ 1 row in set (3.56 sec) 在mysql里的db1,db2,db3都能看到插入的數據： mysql> select * from db3.province; +------+---------+ | id | name | +------+---------+ | 1 | tianjin | +------+---------+ 1 row in set (0.00 sec) mysql> select * from db2.province; +------+---------+ | id | name | +------+---------+ | 1 | tianjin | +------+---------+ 1 row in set (0.01 sec) mysql> select * from db1.province; +------+---------+ | id | name | +------+---------+ | 1 | tianjin | +------+---------+ 1 row in set (0.00 sec) 13.2、 ER join 基於E-R關系的數據分片策略，子表的記錄與所關聯的父表記錄存放在同一個數據分片上。 分片在dn1,dn2上，orders依賴父表進行分片，兩個表的關聯關系為orders.customer_id=customer.id 配置： <tablen ame="customer" dataNode="dn1,dn2" rule="sharding-by-intfile"> <childTable name="orders" joinKey="customer_id" parentKey="id"/> </table> 示例： 創建了一個分片規則：auto-sharding-long-custom id屬於0-1000范圍內的在分區1里，1000-2000的在分區2里，2000-3000的在分片3里。 vi schema.xml 在USERDB處配置： <table name="customer" dataNode="dn1,dn2,dn3" rule="auto-sharding-long-custom"> <childTable name="orders" joinKey="customer_id" parentKey="id"/> </table> 登錄9066端口，使得配置生效： reload @@config_all; [root@PC conf]# mysql -u root -pjenkins@123 -P8066 -h 192.168.0.94 TESTDB Reading table information for completion oftable and column names You can turn off this feature to get aquicker startup with -A Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 1 Server version: 5.5.8-mycat-1.3 MyCatServer (OpenCloundDB) Copyright (c) 2000, 2011, Oracle and/or itsaffisangates. All rights reserved. Oracle is a registered trademark of OracleCorporation and/or its affisangates. Other names may be trademarksof their respective owners. Type 'help;' or '\h' for help. Type '\c' toclear the current input statement. mysql> use USERDB; Reading table information for completion oftable and column names You can turn off this feature to get aquicker startup with -A Database changed mysql> show tables; +------------------+ | Tables in USERDB | +------------------+ | company | | customer | | tb1 | | orders | | province | +------------------+ 5 rows in set (0.01 sec) 建表： mysql> create table customer(id int primary key,name varchar(30)); Query OK, 0 rows affected (0.13 sec) mysql> create table orders(id int,name varchar(30),customer_id int,constraint fk_companyid foreign key(customer_id)references customer(id)); Query OK, 0 rows affected (0.25 sec) 插入幾條數據： mysql>insert into customer(id,name) values(999,'jan'),(1000,'bill'),(1003,'sang'),(2002,'gang'); mysql> insert into orders(id,name,customer_id) values(1,'jekist',999),(2,'jenkin',2002),(3,'clock',1003),(4,'heat',2002); ERROR 1064 (HY000): ChildTable multi insertnot provided 看來mycat子表不支持一次插入多條記錄。 mysql> insert into orders(id,name,customer_id) values(1,'jekist',999); Query OK, 1 row affected (0.07 sec) mysql> insert into orders(id,name,customer_id) values(2,'jenkin',2002) Query OK, 1 row affected (0.02 sec) mysql> insert into orders(id,name,customer_id) values(3,'clock',1003); Query OK, 1 row affected (0.02 sec) mysql> insert into orders(id,name,customer_id)values(4,'heat',2002); Query OK, 1 row affected (0.02 sec) 進入mysql驗證： mysql> select * from db1.customer; +------+------+ | id | name | +------+------+ | 999 | jan | | 1000 | bill | +------+------+ 2 rows in set (0.01 sec) mysql> select * from db2.customer; +------+------+ | id | name | +------+------+ | 1003 | sang | +------+------+ 1 row in set (0.00 sec) mysql> select * from db3.customer; +------+------+ | id | name | +------+------+ | 2002 | gang | +------+------+ 1 row in set (0.00 sec) mysql> select * from db3.orders; +------+--------+-------------+ | id | name | customer_id | +------+--------+-------------+ | 2 | jenkin | 2002 | | 4 | heat | 2002 | +------+--------+-------------+ 2 rows in set (0.00 sec) mysql> select * from db2.orders; +------+-------+-------------+ | id | name | customer_id | +------+-------+-------------+ | 3 | clock | 1003 | +------+-------+-------------+ 1 row in set (0.00 sec) mysql> select * from db1.orders; +------+--------+-------------+ | id | name | customer_id | +------+--------+-------------+ | 1 | jekist | 999 | +------+--------+-------------+ 1 row in set (0.00 sec) 我們看到orders列customer_id對應的customer的id屬於哪個分片，orders的那條記錄就在哪個分片內。 可以在mycat上正常地聯合查詢： mysql> select b.*,a.name as custome_name from customer a inner join orders b on a.id=b.customer_id; +------+--------+-------------+--------------+ | id | name | customer_id |custome_name | +------+--------+-------------+--------------+ | 2 | jenkin | 2002 |gang | | 4 | heat | 2002 | gang | | 1 | jekist | 999 |jan | | 3 | clock | 1003 | sang | +------+--------+-------------+--------------+ 4 rows in set (0.02 sec) 13.3、 share join ShareJoin是一個簡單的跨分片Join,基於HBT的方式實現。 目前支持2個表的join,原理就是解析SQL語句，拆分成單表的SQL語句執行， 然后把各個節點的數據匯集。配置支持任意配置的A,B表如： A,B的dataNode相同 A,B的dataNode不同 示例： 先創建了一個分片規則：auto-sharding-long-custom id屬於0-1000范圍內的在分區1里，1000-2000的在分區2里。 新定義兩個處於不同分片中的兩個表 vi schema.xml 在USERDB處添加： <table name="student" primaryKey="ID" dataNode="dn1,dn2" rule="auto-sharding-long-custom"></table> <table name="score" primaryKey="ID" dataNode="dn2,dn3" rule="auto-sharding-long-custom"></table> 登錄9066端口，使得配置生效： reload @@config_all; 建表： mysql> create table student(id int primary key,name varchar(30)); Query OK, 0 rows affected (0.19 sec) mysql> create table score(id int,studentid int,score int,constraint fk_studentid foreign key(studentid)references student(id)); Query OK, 0 rows affected (0.13 sec) 插入數據： mysql> insert into student(id,name)values(1,'jan'),(1002,'bill'),(88,'sang'); Query OK, 3 rows affected (0.33 sec) Records: 2 Dupsangcates: 0 Warnings: 0 mysql> insert into score(id,studentid,score) values(1,1,100); Query OK, 1 row affected (0.07 sec) mysql> insert into score(id,studentid,score) values(1008,88,90); Query OK, 1 row affected (0.03 sec) mysql> insert into score(id,studentid,score) values(8,1002,99); Query OK, 1 row affected (0.01 sec) 進mysql查詢： mysql> select * from db1.student; +----+------+ | id | name | +----+------+ | 1 | jan | | 88 | sang | +----+------+ 2 rows in set (0.01 sec) mysql> select * from db2.student; +------+------+ | id | name | +------+------+ | 1002 | bill | +------+------+ 1 row in set (0.00 sec) mysql> select * from db3.student; ERROR 1146 (42S02): Table 'db3.student'doesn't exist mysql> select * from db1.score; ERROR 1146 (42S02): Table 'db1.score'doesn't exist mysql> select * from db3.score; +------+-----------+-------+ | id | studentid | score | +------+-----------+-------+ | 1008 | 88 | 90 | +------+-----------+-------+ 1 row in set (0.00 sec) mysql> select * from db2.score; +------+-----------+-------+ | id | studentid | score | +------+-----------+-------+ | 1 | 1 | 100 | | 8 | 1002 | 99 | +------+-----------+-------+ 2 rows in set (0.00 sec) 不使用share join在mycat查詢： mysql> select * from student a inner join score b on a.id=b.studentid; +------+------+------+-----------+-------+ | id | name | id | studentid | score| +------+------+------+-----------+-------+ | 1002 | bill | 8 | 1002 | 99 | +------+------+------+-----------+-------+ 1 row in set (0.02 sec) 只查到了db2分區里面的數據。 使用share join: mysql>/*!mycat:catlet=demo.catlets.ShareJoin */ select * from student a inner join score b on a.id=b.studentid; ERROR 1064 (HY000):java.lang.ClassNotFoundException: demo.catlets.ShareJoin Share join只在開發版本中支持，用的是mycat 1.3，所以不支持。假如支持的話，可以查出匹配的三條記錄，而不是上面的一條。 14、查看分片規則： cat /usr/local/mycat/conf/rule.xml [root@db4 ~]# cat /usr/local/mycat/conf/rule.xml <?xml version="1.0" encoding="UTF-8"?> <!-- - - sangcensed under the Apache sangcense, Version 2.0 (the "sangcense"); - you may not use this file except in compsangance with the sangcense. - You may obtain a copy of the sangcense at - - http://www.apache.org/sangcenses/sangCENSE-2.0 - - Unless required by appsangcable law or agreed to in writing, software - distributed under the sangcense is distributed on an "AS IS" BASIS, - WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or impsanged. - See the sangcense for the specific language governing permissions and - sangmitations under the sangcense. --> <!DOCTYPE mycat:rule SYSTEM "rule.dtd"> <mycat:rule xmlns:mycat="http://io.mycat/"> <tableRule name="rule1"> <rule> <columns>id</columns> <algorithm>func1</algorithm> </rule> </tableRule> <tableRule name="rule2"> <rule> <columns>user_id</columns> <algorithm>func1</algorithm> </rule> </tableRule> <tableRule name="sharding-by-intfile"> <rule> <columns>sharding_id</columns> <algorithm>hash-int</algorithm> </rule> </tableRule> <tableRule name="auto-sharding-long"> <rule> <columns>id</columns> <algorithm>rang-long</algorithm> </rule> </tableRule> <tableRule name="mod-long"> <rule> <columns>id</columns> <algorithm>mod-long</algorithm> </rule> </tableRule> <tableRule name="sharding-by-murmur"> <rule> <columns>id</columns> <algorithm>murmur</algorithm> </rule> </tableRule> <tableRule name="crc32slot"> <rule> <columns>id</columns> <algorithm>crc32slot</algorithm> </rule> </tableRule> <tableRule name="sharding-by-month"> <rule> <columns>create_time</columns> <algorithm>partbymonth</algorithm> </rule> </tableRule> <tableRule name="latest-month-calldate"> <rule> <columns>calldate</columns> <algorithm>latestMonth</algorithm> </rule> </tableRule> <tableRule name="auto-sharding-rang-mod"> <rule> <columns>id</columns> <algorithm>rang-mod</algorithm> </rule> 查看日志： tail -f /usr/local/mycat/logs/wrapper.log 報錯1：Caused by: io.mycat.config.util.ConfigException: SelfCheck### schema test refered by user root is not exist! 意思是test數據庫被拒絕連接，原因是因為創建完test數據庫后沒有給數據庫授權用戶讀寫操作，所以報錯連不上。此時用navicat、python也都連不上的，親測 解決： 1、需要改配置文件 vi /usr/local/mycat/conf/server.xml <user name="root"> <property name="password">jenkins@123</property> # 這里的用戶名密碼是要訪問的mysql的用戶名密碼 <property name="schemas">TEST</property> # 要測試的數據庫 2、需要給test數據庫授權 grant all privileges on test.* TO 'root'@'%' identified by 'jenkins@123' with grant option; flush privileges; 重啟數據庫 systemctl restart mysqld 報錯2：ERROR 3009 (HY000): java.lang.IllegalArgumentException: Invasangd DataSource:0 mysql> use test; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select * from tb1; ERROR 3009 (HY000): java.lang.IllegalArgumentException: Invasangd DataSource:0 解決： 退出用下面方式登錄，因為這是在master節點上的操作，所以不用加ip [root@db2 ~]# mysql -P8066 -uroot -pjenkins@123 mysql> use test; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> mysql> show tables; +----------------+ | Tables_in_test | +----------------+ | tb1 | +----------------+ 1 row in set (0.00 sec) mysql> mysql> select * from tb1; +----+---------+ | id | name | +----+---------+ | 1 | bob | | 2 | join | | 3 | join | | 4 | jenkins | +----+---------+ 4 rows in set (0.00 sec) mysql> 報錯3：ERROR 3009 (HY000): java.lang.IllegalArgumentException: Invasangd DataSource:0 mysql> select * from tb1; ERROR 3009 (HY000): java.lang.IllegalArgumentException: Invasangd DataSource:0 解決： mysql> use mysql; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select host, user from user; +---------------+---------------+ | host | user | +---------------+---------------+ | % | root | | 192.168.0.% | root | | 192.168.0.1.% | root | | localhost | mysql.session | | localhost | mysql.sys | | localhost | root | +---------------+---------------+ 6 rows in set (0.00 sec) mysql> update user set host='%' where user='root'; ERROR 1062 (23000): Dupsangcate entry '%-root' for key 'PRIMARY' mysql> flush privileges; Query OK, 0 rows affected (0.02 sec) 重啟數數據，否則不生效 systemctl restart mysqld 又出現如下新的錯誤： ERROR 1064 (HY000): find no Route:select * from test.tb1 mysql -h 192.168.0.94 -P 8066 -uroot -pjenkins@123 mysql> use test; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select * from test.tb1; ERROR 1064 (HY000): find no Route:select * from test.tb1 解決：參照 https://blog.csdn.net/u011277123/article/details/77876955 報錯4：ERROR 1064 (HY000): op table not in schema----IF mysql> create table if not exists user ( id int(10) PRIMARY KEY AUTO_INCREMENT, name varchar(50) NOT NULL); ERROR 1064 (HY000): op table not in schema----IF 分析：通過mycat建表，而該表並沒有提前配置table標簽，則mycat會找到默認的dataNode，並把表建在默認的dataNode上。如果沒有配置默認dataNode，則mycat會報錯 解決： vi /usr/local/mycat/conf/schema.xml <?xml version="1.0"?> <!DOCTYPE mycat:schema SYSTEM "schema.dtd"> <mycat:schema xmlns:mycat="http://io.mycat/"> <schema name="db1" dataNode="dn1" checkSQLschema="false" sqlMaxsangmit="100"> #添加一個node節點，dataNode="dn1"即可解決 <!-- auto sharding by id (long) --> 參照文檔： 搭建： https://blog.csdn.net/yabingshi_tech/article/details/52312474 http://blog.51cto.com/12323501/2151261 mycat用戶和權限控制管理： http://blog.chinaunix.net/uid-31396856-id-5781522.html 修改配置文件，按照下面這倆做成的： https://www.jianshu.com/p/f15d64fcb2f3 https://blog.csdn.net/u011277123/article/details/77876955 分片規則解釋： https://www.cnblogs.com/raphael5200/p/5884931.html 修改rule.xml參照 https://bbs.csdn.net/topics/392433448