高并发集群饿了么后端的登录模块

1.数据库

非交互式python：

非交互式:

2.数据库的负载均衡：阿里巴巴的mycat

修改配置文件

/usr/local/mycat/conf/server.xml   :对外的账号 密码 数据库

/usr/local/mycat/conf/schema.xml   

如果出现启动异常，8066端口没有打开，可以检查两个日志文件

vim  /usr/local/mycat/logs/wrapper.log

vim   /usr/local/mycat/logs/mycat.log

3.后端服务器

java|python|php

使用jar包启动服务： java -jar  ...

一.配置一主二从mysql57

配置基于gtids事务复制

二.配置mycat读写分离负载均衡

使用mycat为三台数据库设置负载均衡（读写分离）

1.前期环境部署

  [root@mycat ~]# ls
  anaconda-ks.cfg             Mycat-server-1.6.5-release-20180122220033-linux.tar.gz
  jdk-8u192-linux-x64.tar.gz
  [root@mycat ~]# tar -xf jdk-8u192-linux-x64.tar.gz 
  [root@mycat ~]# tar -xf Mycat-server-1.6.5-release-20180122220033-linux.tar.gz 
  [root@mycat ~]# cp -r jdk1.8.0_192/ /usr/local/jdk
  [root@mycat ~]# cp -r mycat/ /usr/local/mycat
  [root@mycat ~]# sed -i '$aexport JAVA_HOME=/usr/local/jdk' /etc/profile
  [root@mycat ~]# source /etc/profile
  [root@mycat ~]# sed -i '$aexport PATH=$PATH:$JAVA_HOME/bin' /etc/profile
  [root@mycat ~]# source /etc/profile
  [root@mycat ~]# javac -version
  javac 1.8.0_192
  [root@mycat ~]#  /usr/local/mycat/bin/mycat console

2.修改server.xml配置文件

  [root@mycat ~]# vim /usr/local/mycat/conf/server.xml
  ​
   93         <user name="haha" defaultAccount="true">
   94                 <property name="password">haha</property>
   95                 <property name="schemas">eleme</property>
  ​
  # 注释
  ​
  107 <!--
  108         <user name="user">
  109                 <property name="password">user</property>
  110                 <property name="schemas">TESTDB</property>
  111                 <property name="readOnly">true</property>
  112         </user>
  113 -->

3.修改schema.xml配置文件

     1.设置schema标签 添加dataNode="xxx" name=eleme

     2.修改dataHost标签

 [root@mycat ~]# vim /usr/local/mycat/conf/schema.xml 
   
    1 <?xml version="1.0"?>
    2 <!DOCTYPE mycat:schema SYSTEM "schema.dtd">
    3 <mycat:schema xmlns:mycat="http://io.mycat/">
    4 
    5         <schema name="eleme" dataNode="dn1" checkSQLschema="false" sqlMaxLimit="10    0"> 
    6         </schema>
    7         <!-- <dataNode name="dn1$0-743" dataHost="localhost1" database="db$0-743"
    8                 /> -->
    9         <dataNode name="dn1" dataHost="localhost1" database="eleme" />
   10 <!--    <dataNode name="dn2" dataHost="localhost1" database="db2" />
   11         <dataNode name="dn3" dataHost="localhost1" database="db3" />-->
   12         <!--<dataNode name="dn4" dataHost="sequoiadb1" database="SAMPLE" />
   13          <dataNode name="jdbc_dn1" dataHost="jdbchost" database="db1" />
   14         <dataNode       name="jdbc_dn2" dataHost="jdbchost" database="db2" />
   15         <dataNode name="jdbc_dn3"       dataHost="jdbchost" database="db3" /> -->
   16         <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0" 17                           writeType="0" dbType="mysql" dbDriver="native" switchTyp    e="1"  slaveThreshold="100">
   18                 <heartbeat>select user()</heartbeat>
   19                 <!-- can have multi write hosts -->
   20                 <writeHost host="hostM1" url="192.168.2.57:3306" user="haha"
   21                                    password="haha">
   22                         <!-- can have multi read hosts --> 23                         <readHost host="hostS2" url="192.168.2.58:3306" user="haha    " password="haha" /> 24                         <readHost host="hostS3" url="192.168.2.59:3306" user="haha    " password="haha" />
   25                 </writeHost>
   26 <!--
   27                 <writeHost host="hostS1" url="localhost:3316" user="root"
   28                                    password="123456" />
   29 -->          30                 <!-- <writeHost host="hostM2" url="localhost:3316" user="root" pas    sword="123456"/> -->
   31         </dataHost>

4.启动服务

三.部署Java17环境

部署两台Java，两台操作一样：

 [root@java01 ~]# ls
  anaconda-ks.cfg  jdk-17_linux-x64_bin.tar.gz 
  [root@java01 ~]# tar -xf jdk-17_linux-x64_bin.tar.gz 
  [root@java01 ~]# ls
  anaconda-ks.cfg  jdk-17.0.12  jdk-17_linux-x64_bin.tar.gz 
  [root@java01 ~]# cp -r jdk-17.0.12/ /usr/local/jdk
  [root@java01 ~]# vim /etc/profile
  export JAVA_HOME=/usr/local/jdk
  export PATH=$PATH:$JAVA_HOME/bin
  [root@java01 ~]# source /etc/profile
  ​
  [root@java01 ~]# javac --version
  javac 17.0.12
  ​
  [root@java01 ~]# firewall-cmd --add-port=8080/tcp --permanent
  success
  [root@java01 ~]# firewall-cmd --reload
  success
  ​
  [root@java01 ~]# ls
  anaconda-ks.cfg  application_(1).yml  eleme_server-0.0.1-SNAPSHOT.jar  jdk-17.0.12  jdk-17_linux-x64_bin.tar.gz
  ​
  [root@java01 ~]# mv application_\(1\).yml application.yml 
  [root@java01 ~]# ls
  anaconda-ks.cfg  application.yml  eleme_server-0.0.1-SNAPSHOT.jar  jdk-17.0.12  jdk-17_linux-x64_bin.tar.gz
  ​
  ​
  [root@java01 ~]# vim application.yml 
  ​
  server:
    port: 8080
  spring:
    datasource:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://192.168.2.19:8066/eleme
      username: haha
      password: haha
  ​
  [root@java01 ~]# java -jar eleme_server-0.0.1-SNAPSHOT.jar 
  

浏览器访问：Java的ip:8080,出现登录页面

四.部署LVS-DR模式

lvs负载均衡两台后端服务器Java

lvs:

  [root@lvs ~]# ifconfig ens33:0 192.168.2.150 broadcast 192.168.2.121 netmask 255.255.255.255 up
  [root@lvs ~]# route add -host 192.168.2.150 dev ens33:0
  [root@lvs ~]# yum -y install ipvsadm
  [root@lvs ~]# ipvsadm -C
  [root@lvs ~]# ipvsadm -A -t 192.168.2.150:8080 -s rr
  [root@lvs ~]# ipvsadm -a -t 192.168.2.150:8080 -r 192.168.2.11 -g
  [root@lvs ~]# ipvsadm -a -t 192.168.2.150:8080 -r 192.168.2.12 -g
  [root@lvs ~]# systemctl stop firewalld
  [root@lvs ~]# systemctl disable firewalld
  Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
  Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
  [root@lvs ~]# setenforce 0
  [root@lvs ~]# systemctl stop firewalld
  [root@lvs ~]# ipvsadm -Ln
  IP Virtual Server version 1.2.1 (size=4096)
  Prot LocalAddress:Port Scheduler Flags
    -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
  TCP  192.168.2.150:8080 rr
    -> 192.168.2.11:8080            Route   1      0          1         
    -> 192.168.2.12:8080            Route   1      0          1         

两台java:

  [root@java01 ~]# ifconfig lo:0 192.168.2.150 broadcast 192.168.2.150 netmask 255.255.255.255 up
  [root@java01 ~]# route add -host 192.168.2.150 dev lo:0
  [root@java01 ~]# vim arp.sh
  [root@java01 ~]# source arp.sh

访问：访问lvs的vip地址:8080,出现登录页

五.nginx代理端口

在lvs上下载nginx,代理8080端口

/etc/nginx/nginx.conf

server localhost:8080

server  java服务器ip:8080