MySQL database (master-slave synchronization, separate read and write real)

Demo1: MySQL master-slave synchronization

lab environment:

The application side: CentOS 7-2 (192.168.18.149, has been installed MySQL)
Amoeba: CentOS 7-1 (192.168.18.128, no MySQL)
Master: centOS 7-3 (192.168.18.148, has been installed MySQL)
from the server: CentOS 7-4 (192.168.18.145, has been installed MySQL)

The primary server settings:

Installation time synchronization service:

[root@master ~]# yum install ntp -y
[root@master ~]# vim /etc/ntp.conf      #修改ntp配置文件
    server 127.127.195.0        //本地是时钟源，195段落//
    fudge 127.127.195.0 stratum 8       //设置时间层级为8//
[root@master ~]# systemctl start ntpd

Modify MySQL main configuration file:

[root@master ~]# vim /etc/my.cnf
    server-id 10
    log-bin=zhu-bin
    log-slave-updates=ture    ##开启主从同步
[root@master ~]# systemctl restart mysqld
[root@master ~]# systemctl stop firewalld

Modify the content into the database:

[root@master ~]# mysql -u root -p
grant replication slave on *.* to 'myslave'@'192.168.18.%' identified by 'abc123';
#允许从服务器使用myslave账户在主服务器上进行复制操作
show master status;   #查看主服务器信息
mysql> mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000005 |      868 |              |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

From the server settings:

Install the synchronization service client ntpd:

[root@slave ~]# yum install ntp ntpdate -y
[root@slave ~]# systemctl start ntpd
[root@slave ~]# systemctl stop firewalld
[root@slave ~]# /usr/sbin/ntpdate 主服务器地址

Modify MySQL main configuration file:

[root@slave ~]# vim /etc/ntp.conf
    server-id = 20
    relay-log = relay-bin      ###同步日志文件到本地
    relay-log-index = slave-bin.index    ##定义日志文件类型及名称
[root@slave ~]# systemctl restart mysqld

Into the database modifications:

[root@slave ~]# mysql -u root -p123123
change master to master_host='192.168.18.148',master_user='myslave',master_password='abc123',master_log_file='mysql-bin.000005',master_log_pos=865;
    ##授予权限
start slave;
###查询同步是否成功
show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Reconnecting after a failed master event read
                  Master_Host: 192.168.142.148
                  Master_User: myslave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000004
          Read_Master_Log_Pos: 1633
               Relay_Log_File: master1-relay-bin.000011
                Relay_Log_Pos: 1126
        Relay_Master_Log_File: mysql-bin.000004
             Slave_IO_Running: Yes        ##IO连接
            Slave_SQL_Running: Yes        ##SQL连接
            ......

common problem:

Sometimes the shots will meet from synchronization Slave_SQL_Running:NOproblems, the following is a workaround:

MariaDB [(none)]> stop slave;                                                       
MariaDB [(none)]> SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1; START SLAVE;
MariaDB [(none)]> start slave; 
MariaDB [(none)]> show slave status\G 

The above is from MySQL master synchronization process, following separation of static and dynamic!

---

Demo2: MySQL separate read and write

实验基于主从同步的基础上进行

Amoeba server settings:

Jdk installation environment:

[root@amoeba ~]# systemctl stop firewalld.service   #关闭防火墙
[root@amoeba ~]# setenforce 0
[root@amoeba mnt]# cp -p jdk-6u14-linux-x64.bin /usr/local/  #移动事先准备好的jdk包
[root@amoeba mnt]# cd /usr/local/
[root@amoeba local]# ./jdk-6u14-linux-x64.bin       #安装jdk环境
[root@amoeba local]# mv jdk1.6.0_14/ jdk1.6
##配置jdk环境变量
[root@amoeba local]# vim /etc/profile 
    export JAVA_HOME=/usr/local/jdk1.6
    export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib 
    export PATH=$JAVA_HOME/lib:$JAVA_HOME/jre/bin/:$PATH:$HOME/bin
    export AMOEBA_HOME=/usr/local/amoeba
    export PATH=$PATH:$AMOEBA_HOME/bin
[root@amoeba local]# source /etc/profile

Unpack, install Amoeba Kit:

[root@amoeba local]# mkdir amoeba
[root@amoeba local]# tar zxf /mnt/amoeba-mysql-binary-2.2.0.tar.gz -C /usr/local/amoeba
[root@amoeba local]# chmod -R 755 amoeba/

[root@amoeba local]# /usr/local/amoeba/bin/amoeba           #检查是否安装成功
amoeba start|stop     #出现以下命令行即为成功

Modifying the master configuration file amoeba.xml:

[root@amoeba local]# vim amoeba/conf/amoeba.xml
#增加客户机访问amoeba的账户、密码
<property name="user">amoeba</property>
<property name="password">123123</property>
---------------------------------------------------------
#开启默认池、读取池、写入池
<property name="defaultPool">master</property>
<property name="writePool">master</property>
<property name="readPool">slaves</property>

Modify amoeba profile dbserver.xml about your database:

[root@amoeba local]# vim amoeba/conf/dbServers.xml
#修改amoeba访问节点服务器的账户、密码
<!-- mysql user -->
    <property name="user">test</property>
<!--  mysql password  -->
    <property name="password">asd123</property>
-------------------------------------------------------------
#指定主、从服务器节点地址
<dbServer name="master"  parent="abstractServer">
    <property name="ipAddress">192.168.18.148</property>
<dbServer name="slave"  parent="abstractServer">
    <property name="ipAddress">192.168.18.145</property>
--------------------------------------------------------------
#将从服务器划入读取地址池中
<dbServer name="slaves" virtual="true">
    <property name="poolNames">slave</property>

Return to the main, from the database server:

[root@slave ~]# mysql -u root -p123123     #进入主服务器数据库（从服务器与主服务器操作相同）
grant all on *.* to test@'192.168.18.%'identified by 'abc123';  #开放test用户访问权限

Open amoeba server:

[root@amoeba conf]# /usr/local/amoeba/bin/amoeba start &   #调入后台持续运行

Application client operations:

Under the premise installed MySQL, enter mysql -u amoeba -p123123 -h 192.168.18.128 -P8066to successfully access the amoeba server. At this time, the primary server when the master write read and write, read from the server using the slave.