The realization of linux based on mycat's read-write separation

Written at the very beginning: The experiment requires a mycat server, a master server, and a slave server, and the separation of master and slave is required. (If you don't use master-slave replication, you can check the previously published blog by yourself)
1. Read-write separation is based on master-slave replication, so you need to perform read-write separation after master-slave replication.
2. Install the java environment:

[root@mycat tools]# ls
jdk-8u60-linux-x64.tar.gz
mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
[root@mycat tools]# tar xf jdk-8u60-linux-x64.tar.gz 
[root@mycat tools]# ls
jdk1.8.0_60
jdk-8u60-linux-x64.tar.gz
mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
[root@mycat tools]# mv jdk1.8.0_60/ /usr/local/java8
[root@mycat tools]# cd /usr/local/java8/
[root@mycat ~]# vim /etc/profile.d/java.sh

export JAVA_HOME=/usr/local/java8
export CLASSPATH=$JAVA_HOME/lib/
export PATH=$PATH:$JAVA_HOME/bin

[root@mycat ~]# source /etc/profile
##[root@mycat ~]# source /etc/profile.d/java.sh 
[root@mycat ~]# java -version
java version "1.8.0_60"
Java(TM) SE Runtime Environment (build 1.8.0_60-b27)
Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode)

3. Install mycat

[root@mycat tools]# ls
jdk-8u60-linux-x64.tar.gz
Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
[root@mycat tools]# ls
jdk-8u60-linux-x64.tar.gz
mycat
Mycat-server-1.6-RELEASE-20161028204710-linux.tar.gz
mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz
[root@mycat tools]# mv mycat/ /usr/local/
[root@mycat tools]# useradd -M -s /sbin/nologin  mycat
[root@mycat tools]# chown -R mycat:mycat /usr/local/mycat/
[root@mycat tools]# vim /etc/profile.d/mycat.sh

export MYCAT_HOME=/usr/local/mycat
export PATH=$PATH:$MYCAT_HOME/bin

[root@mycat tools]# source /etc/profile.d/mycat.sh 
[root@mycat ~]# cd /usr/local/mycat/
[root@mycat mycat]# ls
bin  catlet  conf  lib  logs  version.txt
[root@mycat mycat]# cd conf/
[root@mycat conf]# ls

[root@mycat conf]# vim ./schema.xml

[root@mycat conf]# vim server.xml

<property name="useSqlStat">0</property>
<property name="useGlobleTableCheck">0</property>                                            
<property name="useHandshakeV10">1</property>
<property name="processorBufferPoolType">0</property>
<property name="serverPort">3310</property>
<property name="managerPort">9066</property>
<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="sequnceHandlerType">2</property>

The second user name is changed to "mycat".

4.Master master library authorization

mysql> grant all on *.* to [email protected] identified by '123123';
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

5. Mycat View
Netstat View port

3310 9066 Port is open The

read-write separation arrangement is successful.

6. Install the database test ( yum -y install mariadb mariadb-server)

Mycat server:

[root@mycat ~]# mysql -uroot -p123123 -h 127.0.0.1 -P9066

MySQL [(none)]> use HEADSHOW;
Database changed
MySQL [HEADSHOW]>

Then enter 3310 operation (logical database)

[root@mycat ~]# mysql -uroot -p123123 -h 127.0.0.1 -P3310
MySQL [(none)]> show databases;

MySQL [(none)]> use HEADSHOW;
MySQL [HEADSHOW]> show tables;
MySQL [HEADSHOW]> create table abc(id int(2));
MySQL [HEADSHOW]> show tables;

Enter the master main library, and the slave slave library to check whether mycat can connect to the main library and the slave library.

mysql> use test;
mysql> show tables;

7. Disable the test read-write separation from the library
1) Enter the slave library

mysql> stop slave io_thread;
mysql> use test;
mysql> show tables;
mysql> select * from abc;

2) Enter the master main library

mysql> stop slave io_thread;
mysql> use test;
mysql> show tables;
mysql> select * from abc;

3) Enter mycat

 MySQL [HEADSHOW]> insert into abc values(2);

MySQL [HEADSHOW]> select * from abc

4) Enter the master main library to see if there is data

mysql> select * from abc;

The test read-write separation operation is successfully realized! ! !

The contents of the configuration file are all as follows:
schema.xml

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">

	<schema name="HEADSHOW" checkSQLschema="false" sqlMaxLimit="100" dataNode='dn1'></schema>
	<dataNode name="dn1" dataHost="localhost1" database="test" />
	<dataHost name="localhost1" maxCon="1000" minCon="10" balance="1"
	 writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
		<heartbeat>select user()</heartbeat>
		<!-- can have multi write hosts -->
		<writeHost host="192.168.9.9" url="192.168.9.9:3306" user="root"
				   password="123123">
			<!-- can have multi read hosts -->
			<readHost host="192.168.9.10" url="192.168.9.10:3306" user="root" password="123123" />
		</writeHost>
		<writeHost host="hostS1" url="localhost:3316" user="root"
				   password="123456" />
		<!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
	</dataHost>
	<!--
		<dataHost name="sequoiadb1" maxCon="1000" minCon="1" balance="0" dbType="sequoiadb" dbDriver="jdbc">
		<heartbeat> 		</heartbeat>
		 <writeHost host="hostM1" url="sequoiadb://1426587161.dbaas.sequoialab.net:11920/SAMPLE" user="jifeng" 	password="jifeng"></writeHost>
		 </dataHost>

	  <dataHost name="oracle1" maxCon="1000" minCon="1" balance="0" writeType="0" 	dbType="oracle" dbDriver="jdbc"> <heartbeat>select 1 from dual</heartbeat>
		<connectionInitSql>alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss'</connectionInitSql>
		<writeHost host="hostM1" url="jdbc:oracle:thin:@127.0.0.1:1521:nange" user="base" 	password="123456" > </writeHost> </dataHost>

		<dataHost name="jdbchost" maxCon="1000" 	minCon="1" balance="0" writeType="0" dbType="mongodb" dbDriver="jdbc">
		<heartbeat>select 	user()</heartbeat>
		<writeHost host="hostM" url="mongodb://192.168.0.99/test" user="admin" password="123456" ></writeHost> </dataHost>

		<dataHost name="sparksql" maxCon="1000" minCon="1" balance="0" dbType="spark" dbDriver="jdbc">
		<heartbeat> </heartbeat>
		 <writeHost host="hostM1" url="jdbc:hive2://feng01:10000" user="jifeng" 	password="jifeng"></writeHost> </dataHost> -->

	<!-- <dataHost name="jdbchost" maxCon="1000" minCon="10" balance="0" dbType="mysql"
		dbDriver="jdbc"> <heartbeat>select user()</heartbeat> <writeHost host="hostM1"
		url="jdbc:mysql://localhost:3306" user="root" password="123456"> </writeHost>
		</dataHost> -->
</mycat:schema>

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="useSqlStat">0</property>
<property name="useGlobleTableCheck">0</property>                                            
<property name="useHandshakeV10">1</property>
<property name="processorBufferPoolType">0</property>
<property name="serverPort">3310</property>
<property name="managerPort">9066</property>
<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="sequnceHandlerType">2</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">123123</property>
		<property name="schemas">HEADSHOW</property>
		
		<!-- 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>

	<user name="mycat">
		<property name="password">123123</property>
		<property name="schemas">HEADSHOW</property>
		<property name="readOnly">true</property>
	</user>

</mycat:server>