CentOS 7安装Mysql+Mycat

1. 安装MySQL yum源

   yum localinstall  http://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm
   

2. 修改源

   vi /etc/yum.repos.d/mysql-community.repo
   [mysql-connectors-community]
   name=MySQL Connectors Community
   baseurl=http://repo.mysql.com/yum/mysql-connectors-community/el/7/$basearch/
   enabled=0
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
   
   [mysql-tools-community]
   name=MySQL Tools Community
   baseurl=http://repo.mysql.com/yum/mysql-tools-community/el/7/$basearch/
   enabled=0
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
   
   # Enable to use MySQL 5.5
   [mysql55-community]
   name=MySQL 5.5 Community Server
   baseurl=http://repo.mysql.com/yum/mysql-5.5-community/el/7/$basearch/
   enabled=0
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
   
   # Enable to use MySQL 5.6
   [mysql56-community]
   name=MySQL 5.6 Community Server
   baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/7/$basearch/
   enabled=1 # 启用5.6
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
   
   [mysql57-community]
   name=MySQL 5.7 Community Server
   baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/7/$basearch/
   enabled=0 # 禁用5.7
   gpgcheck=1
   gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
   

3. 刷新源

   yum repolist enabled | grep mysql
   

4. 安装MySQL

   yum install mysql-community-server
   

5. 启动MySQL

   systemctl start mysqld  #启动MySQLDB
   systemctl stop mysqld  #停止MySQLDB
   systemctl restart mysqld  #重启MySQLDB
   systemctl enable mysqld  #设置开机启动`
   

6. 配置多实例

   • 初始化实例目录

     mysql_install_db --datadir=/var/lib/mysql/3306 --user=mysql
     mysql_install_db --datadir=/var/lib/mysql/3307 --user=mysql
     

   • 修改配置

     vi /etc/my.cnf
     [client]
     default-character-set = utf8
     
     [mysqld_multi]
     mysqld     = /usr/bin/mysqld_safe
     mysqladmin = /usr/bin/mysqladmin
     user       = root
     log        = /var/log/mysqld.multi.log
     
     [mysqld1]
     user=mysql
     port=3306
     datadir=/var/lib/mysql/3306
     socket=/var/lib/mysql/3306.sock
     pid-file=/tmp/mysql3306.pid
     log-error=/var/log/3306-error.log
     max_allowed_packet=1M
     table_open_cache=4
     thread_stack=128k
     character_set_server=utf8
     lower_case_table_names=1
     server-id=1
     log-bin = master3306-bin  #必须开启
     log-bin-index = master3306-bin.index  #必须开启
     
     [mysqld2]
     user=mysql
     port=3307
     datadir=/var/lib/mysql/3307
     socket=/var/lib/mysql/3307.sock
     pid-file=/tmp/mysql3307.pid
     log-error=/var/log/3307-error.log
     max_allowed_packet=1M
     table_open_cache=4
     thread_stack=128k
     character_set_server=utf8
     lower_case_table_names=1
     server-id=2
     log-bin=mysql3307-bin
     relay-log = relay-log
     relay-log-index = relay-log-index
     read-only = on
     

7. 启动多实例

   mysqld_multi start
   

8. 开放端口

   firewall-cmd --zone=public --add-port=3306/tcp --permanent
   firewall-cmd --zone=public --add-port=3307/tcp --permanent
   firewall-cmd --reload
   

9. 连接主库

   grant replication slave on *.* to 'reply'@'localhost' identified by 'reply';
   FLUSH PRIVILEGES;
   

10. 连接从库

    change master to master_host='localhost',master_user='repl',master_password='repl',master_port=3306;
    start slave;
    show slave status;## Slave_IO_Running：Yes, Slave_SQL_Running:Yes
    

11. 测试

    • 主库

      create database test; -- 主库建库
      

    • 从库

      show databases; -- 从库查看
      

安装JDK

1. 下载JDK

   http://download.oracle.com/otn-pub/java/jdk/8u65-b17/jdk-8u65-linux-x64.tar.gz?AuthParam=1446824947_759e61ddd65fdc24639703e1929d6e21
   

2. 解压JDK

   ```
   tar xzvf jdk-8u65-linux-x64.tar.gz
   mv jdk1.8.0_65 /usr/local/
   ```
   

3. 配置环境变量

   vi /etc/profile
   export JAVA_HOME=/usr/local/jdk1.8.0_65
   export PATH=$PATH:$JAVA_HOME/bin
   
   . /etc/profile
   

安装Mycat

1. 下载Mycat

   cd /opt
   wget https://github.com/MyCATApache/Mycat-download/raw/master/1.4.1-DEV/Mycat-server-1.4.1-dev-20151104100146-linux.tar.gz
   

2. 解压Mycat

   tar xzvf Mycat-server-1.4.1-dev-20151104100146-linux.tar.gz
   

3. 配置

   <?xml version="1.0"?>
   <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
   <mycat:schema xmlns:mycat="http://org.opencloudb/">
       <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100">
           <table name="t_user" dataNode="dn1,dn2,dn3" rule="auto-sharding-long" />
       </schema>
       <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743" 
           /> -->
       <dataNode name="dn1" dataHost="localhost1" database="db1" />
       <dataNode name="dn2" dataHost="localhost1" database="db2" />
       <dataNode name="dn3" dataHost="localhost1" database="db3" />
       <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"
           writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
           <heartbeat>select user()</heartbeat>
           <!-- can have multi write hosts -->
           <writeHost host="hostM1" url="localhost:3306" user="root"
               password="123456">
               <!-- can have multi read hosts -->
           </writeHost>
           <writeHost host="hostS1" url="localhost:3307" user="root"
               password="123456" />
           <!-- <writeHost host="hostM2" url="localhost:3316" user="root" password="123456"/> -->
       </dataHost>
   </mycat:schema>
   

4. 启动

   cd /opt/
   ./bin/mycat start && tail -200f logs/mycat.log
   

安装Mycat-Web

1. 下载

   cd /opt
   wget http://nexus.mycat.io/content/groups/public/io/mycat/mycat/Mycat-web/1.0-SNAPSHOT/Mycat-web-1.0-20151020.024535-7-20151020104455-linux.tar.gz
   

2. 解压

   tar xzvf Mycat-web-1.0-20151020.024535-7-20151020104455-linux.tar.gz
   

3. 启动

   cd mycat-web
   ./start.sh
   

4. 访问

   点击访问?IP根据实际情况