haproxynginx以及httpd负载均衡tomcat主机,seesion保持问题

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**实验环境**



CentOS 7

haproxy(nginx):172.16.61.4(node4)

httpd+tomcat:172.16.61.7(node7)

       172.16.61.8(node8)

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一、使用nginx做负载均衡


**配置tomcat以及httpd**



<Engine name="Catalina" defaultHost="localhost" jvmRoute="Tomcat8">   #在node8节点添加jvmRoute标记,便于直观查看负载均衡效果(node7节点为Tomcat7)

 <Host name="node8.tz.com"  appBase="/data/webapps"    #在两台tomcat上配置同样的虚拟主机
            unpackWARs="true" autoDeploy="true">

            
[[email protected] conf.d]# cat proxy.conf      #httpd配置(两台tomcat要相同)        
<VirtualHost *:80>              
    ServerName tc1.tz.com
    ProxyRequests Off
    ProxyVia On
    ProxyPreserveHost On

    <Proxy *>
        Require all granted
    </Proxy>
    ProxyPass / ajp://localhost:8009/
    ProxyPassReverse / ajp:://localhost:8009/
    <Location />
        Require all granted
    </Location>
</VirtualHost> 

[[email protected] ROOT]# cat index.jsp           #在tomcat的虚拟主机中定义主页内容
<%@ page language="java" %> 
<html>
  <head><title>Tomcat7</title></head>            
  <body>
    <h1><font color="red">node8.tz.com</font></h1>
    <table align="centre" border="1">
      <tr>
        <td>Session ID</td>
    <% session.setAttribute("magedu.com","magedu.com"); %>
        <td><%= session.getId() %></td>
      </tr>
      <tr>
        <td>Created on</td>
        <td><%= session.getCreationTime() %></td>
     </tr>
    </table>
  </body>
</html>

**配置nginx**



upstream tcsrvs {              #在nginx配置文件中定义upsteam模块,默认采用轮询的调度算法
        server node8:80;        #基于主机名调度,本地hosts文件要解析后端hostname
        server node7:80;

    }

location / {                  #在server中定义location进行反向代理
          proxy_set_header Host $http_host;    #将客户端请求的host代理至后端
          proxy_pass http://tcsrvs/;
        }

配置本地hosts文件,解析172.16.61.4 node8.tz.com地址


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实现了轮询的效果


**haproxy负载均衡tomcat**



[[email protected] haproxy]# sed ‘[email protected]^#.*\+\|^[[:space:]]\+#.*\[email protected]@‘ haproxy.cfg
global
   log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    stats socket /var/lib/haproxy/stats
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000


frontend  main *:80

    default_backend        tomcat

listen statistics
	bind	 *:9090
	stats	 enable
	stats	hide-version
	stats uri   /haproxyadmin?stats
	stats realm  "HAproxy\ Statistics"
	stats auth    admin:tianzhuang
	stats admin	if TRUE
backend tomcat
    balance     roundrobin
    server      tomcat1 172.16.61.7:80 check
    server	tomcat2 172.16.61.8:80 check

**httpd负载均衡配置**



<proxy balancer://tccluster>
        BalancerMember http://172.16.61.7:80 loadfactor=1
        BalancerMember http://172.16.61.8:80 loadfactor=1
        ProxySet lbmethod=bytraffic
</proxy>

<VirtualHost *:80>
        ServerName  localhost
        ProxyRequests Off
        ProxyVia  On
        ProxyPass / balancer://tccluster/
        ProxyPassReverse / balancer://tccluster/
        ProxyPreserveHost On
        <Proxy *>
          Require all granted
        </Proxy>
        <Location />
          Require all granted
        </Location>
</VirtualHost>


**保持session会话**



  • nginx负载均衡session保持问题:


 upstream tcsrvs {
        server node8:80;
        server node7:80;
        ip_hash;            #基于客户端地址进行hash,将来自同一ip的请求发至同一个server
#        hash $request_uri;  #基于请求的uri hash,应用于后端的缓存server;
#        hash $remote_addr;  #基于远程客户端地址hash,相当于ip_hash;
    }


  • haproxy负载均衡session保持问题:


backend tomcat
    balance     roundrobin
    cookie  TOMCAT insert nocache           #在后端主机的响应报文中插入cookie
    server      tomcat1 172.16.61.7:80 check    cookie tomcat1
    server      tomcat2 172.16.61.8:80 check    cookie tomcat2


  • httpd负载均衡session保持问题:


[[email protected] conf.d]# cat proxy.conf 
Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED              #增加头部的session信息,以route为关键字
<proxy balancer://tccluster>
	BalancerMember http://172.16.61.7:80 loadfactor=1 route=Tomcat7  #route为Tomcat7,后端tomcat server也需要加入该route信息
	BalancerMember http://172.16.61.8:80 loadfactor=1 route=Tomcat8
	ProxySet lbmethod=bytraffic
	ProxySet stickysession=ROUTEID
</proxy>

<VirtualHost *:80>
        ServerName  localhost
	ProxyRequests Off
	ProxyVia  On
	ProxyPass / balancer://tccluster/
	ProxyPassReverse / balancer://tccluster/
	ProxyPreserveHost On
	<Proxy *>
	  Require all granted
	</Proxy>
	<Location />
	  Require all granted
	</Location>
</VirtualHost>








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