nginx实现tomcat的负载均衡及企业内部应用的代理

192.168.3.87  mysql+redis+tomcat

192.168.3.112 nginx:6688
192.168.3.86  nginx+h5

环境准备

a.安装包 
open jdk 1.8
tomcat 8.0
nginx 1.1.13.tar.gz
mysql5.5.48.tar.gz

b.解析域名admin.chinasoft.com和ops.chinasoft.com到nginx负载均衡服务器

①后端3.87和3.112jdk的部署
yum install -y java-1.8.0-openjdk
yum install -y redis


验证是否安装成功


java -version
openjdk version "1.8.0_91"
OpenJDK Runtime Environment (build 1.8.0_91-b14)
OpenJDK 64-Bit Server VM (build 25.91-b14, mixed mode


②tomcat的部署
tar -zxvf apache-tomcat-8.0.36.tar.gz 
mv apache-tomcat-8.0.36 /usr/local/tomcat


将tomcat的命令加入环境变量中
# vim /etc/profile.d/tomcat.sh


export CATALINA_HOME=/usr/local/tomcat  
export PATH=$CATALINA_HOME/bin:$PATH


source /etc/profile.d/tomcat.sh


修改http的web端口为8888
vim /usr/local/tomcat/conf/server.xml 


 <Connector port="8888" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />


启动服务并验证是否正常启动
startup.sh
ss -tunlp|grep 8888


③将war包放入webapps目录下，重新启动tomcat，验证是否成功，错误日志可以查看catalina.out文件


将域名解析指向nginx负载均衡器：192.168.8.86 admin.chinasoft.com


配置nginx负载均衡器


将具体的定义防止到/etc/nginx/conf文件目下
在nginx.conf中定义目录包含：


include /etc/nginx/conf/*.conf;


在conf目录下分别定义后端服务器，nginx中h5和zabbix等内部管理系统的定义


cat h5.conf


server {
    access_log /data/logs/h5_acc.log;   #访问日志
    error_log /data/logs/h5_error.log info; #错误日志
    server_name localhost; #因为是放置在本机，所以直接用Localhost
    root /web/h5; #自定义存放web文件目录
}


cat flow_admin.conf 


# 定义后端负载均衡的两台机器
upstream flows {
    server 192.168.3.87:8888 weight=1;
    server 192.168.3.112:6688 weight=1;
}
server {
    server_name   admin.chinasoft.com;   #定义servername即指向nginx的域名
    access_log /data/logs/flowadm_acc.log;
    error_log /data/logs/flowadm_error.log info;


    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Real-Ip $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass  http://flows/;
    }

}

负载均衡效果：

cat ops.conf


# 定义zabbix等内部服务
server {
    server_name   ops.chinasoft.com;


    location /zabbix/ {
        proxy_set_header Host $host;
        proxy_set_header X-Real-Ip $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_pass  http://192.168.3.108/zabbix/;
    }

}

几段生产环境的例子：

ops.conf

server{
      server_name ss.chinasoft.com;
      index index.html index.htm index.php;

#zabbix server access by nginx proxy
     location /zabbix/ {
             proxy_pass http://u04zbx01.yaya.corp/zabbix/;
      }

     location /ldap/ {
             proxy_pass http://u04dns01.yaya.corp/ldap/;
}
}

flow.conf

    server {
    server_name   flowadm.chinasoft.com;

    access_log  /data/logs/flowadm_access.log;
    error_log  /data/logs/flowadm_error.log  info;


    location / {
            proxy_set_header Host $host;
            proxy_set_header X-Real-Ip $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            #proxy_pass  http://flows_admin;
            proxy_pass  http://u04flow01.yaya.corp:8888/;
    }
}

h5.conf

upstream flows {
    server u04flow01.yaya.corp:8080;
    server u04flow02.yaya.corp:8080;
}


server {
    server_name   flow.chinasoft.com;
    error_log  /data/logs/flow_h5.log  info;
    access_log /data/logs/flow_h5.log;

    location /h5/flow/{
        alias  /data/h5/flow/;
        index  index.html;
    }

    location /sdkApi/{
            proxy_set_header Host $host;
            proxy_set_header X-Real-Ip $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            #proxy_pass  http://u04flow01.yaya.corp:8080/; 
            proxy_pass  http://flows;
    }
	
    #error_page  404              /404.html;

}

web.conf

server {
    server_name   1.1.1.1;
    server_name   www.baidu.com www.aaa.com
    error_log  /data/logs/web-acccess.log  info;
    access_log /data/logs/web-error.log;


    location /{
      alias /home/hailitao/;   #这里为代码存放路径
      index  views/index/index.html;
    }

    location /api/{
                proxy_set_header Host $host;
                proxy_set_header X-Real-Ip $remote_addr;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_pass  http://192.168.3.85:9783/;   #这里为服务端所部署的地址
    }
}

share.conf

upstream bills {
    server u04tv01.chinasoft.com:6643;
    server u04tv02.chinasoft.com:6643;
}

server {
    server_name  fx.chinasoft.com;
    error_log  /data/logs/share_error.log  info;
    access_log /data/logs/share_access.log;

    location /{
      alias /data/haili_share/;
      index room.html;
    }

    location /hailishare/{
           # proxy_set_header Host $host;  
           # proxy_set_header X-Real-Ip $remote_addr;  
           # proxy_set_header X-Forwarded-For $remote_addr;  
            proxy_pass  http://bills/;
    }
}