Nginx并搭建Tomcat负载均衡环境

http://blog.csdn.net/zhoufoxcn/article/details/72872524

http://blog.csdn.net/duguxingfeng/article/details/78929472

安装 tomcat 为测试Nginx反向代理

1.下载

# wget http://mirrors.shuosc.org/apache/tomcat/tomcat-8/v8.0.48/bin/apache-tomcat-8.0.48.tar.gz

2.解压

# tar -zxvf apache-tomcat-8.0.48.tar.gz

3.启动测试

# cd /apache-tomcat-8.0.48/bin

# ./startup.sh

 [root@localhost bin]# ./startup.sh
 Using CATALINA_BASE:   /usr/software/apache-tomcat-8.0.48
 Using CATALINA_HOME:   /usr/software/apache-tomcat-8.0.48
 Using CATALINA_TMPDIR: /usr/software/apache-tomcat-8.0.48/temp
 Using JRE_HOME:        /usr/java/jdk1.8.0_121/jre
 Using CLASSPATH:       /usr/software/apache-tomcat-8.0.48/bin/bootstrap.jar:/usr/software/apache-tomcat-8.0.48/bin/tomcat-juli.jar
 Tomcat started.

启动成功 访问：http://localhost:8080

4.打开 nginx的配置文件

# cd /usr/local/nginx/conf

复制一份配置文件 命名为： nginx.conf.bak

#cp nginx.conf nginx.conf.bak

# vim nginx.conf

找到： location / 处，添加：  proxy_pass http://localhost:8080; http://localhost:8080;为tomcat的访问路径

 server {
   <strong>  listen       80; #nginx的监听端口strong>
     server_name  localhost;

     #charset koi8-r;

     #access_log  logs/host.access.log  main;

     location / {
         root   html;
         index  index.html index.htm;
      <span style="color:#cc0000;">   proxy_pass http://localhost:8080;span>
     }

     #error_page  404              /404.html;

     # redirect server error pages to the static page /50x.html
     #
     error_page   500 502 503 504  /50x.html;
     location = /50x.html {
         root   html;
     }

修改之后，保存。重启nginx

# ./usr/local/nginx/sbin/nginx -s reload

访问：http://localhost:80 即可访问 tomcat的路径

四、Nginx 负载均衡

1.此处需要部署两个tomcat 进入到第四步下载的tomcat的路径下

# cp -r apache-tomcat-8.0.48 tomcat1

# cp -rapache-tomcat-8.0.48 tomcat2

2.修改tomcat配置文件

tomcat1 端口设定为8080 ；tomcat1的配置无需修改

tomcat2 端口设定为8090

# cd /tomcat2/conf

# vim server.xml

修改

8005" shutdown="SHUTDOWN">

为：8015" shutdown="SHUTDOWN">

8080" protocol="HTTP/1.1"  connectionTimeout="20000"  redirectPort="8443" />

为：8090" protocol="HTTP/1.1" connectionTimeout="20000"  redirectPort="8443" />

8009" protocol="AJP/1.3" redirectPort="8443" />

为： 8019" protocol="AJP/1.3" redirectPort="8443" />

3.在tomcat1和tomcat2下创建测试站点

# cd /tomcat1/webapp

# madir test

# vi index.html

添加

this is tomcat1 index

esc ：wq 保存推出。

同理在tomcat2下创建test与indexhtml，添加this is tomcat2 index

# cd /tomcat2/webapp

# madir test

# vi index.html

添加

this is tomcat2 index

esc ：wq 保存推出。

同时为便于识别，修改监听8081端口的Tomcat的root目录下的index.jsp页面，将首页中的“
If you're seeing this, you've successfully installed Tomcat. Congratulations!”

改为“If you're seeing this, you've successfully installed Tomcat. Congratulations!Server port:8081!”。

4.修改Nginx的 nginx.conf配置文件

# vim /usr/local/nginx/conf/nginx.conf

 http {
     include       mime.types;
     default_type  application/octet-stream;

     #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
     #                  '$status $body_bytes_sent "$http_referer" '
     #                  '"$http_user_agent" "$http_x_forwarded_for"';

     #access_log  logs/access.log  main;

     sendfile        on;
     #tcp_nopush     on;

     #keepalive_timeout  0;
     keepalive_timeout  65;

     #gzip  on;

     <span style="color:#ff0000;">upstream mytomcat {
         server localhost:8080 weight=100;
         server localhost:8090 weight=110;
     }span>

 server {
     listen       80;
     server_name  <span style="color:#ff0000;">mytomcatspan>;

     #charset koi8-r;

     #access_log  logs/host.access.log  main;

     location / {
         root   html;
         index  index.html index.htm;
        <span style="color:#ff0000;"> proxy_pass http://mytomcat;span>
     }

     #error_page  404              /404.html;

     # redirect server error pages to the static page /50x.html
     #
     error_page   500 502 503 504  /50x.html;

保存后退出

分别启动tomcat1与tomcat2

# /tomcat1/bin/startup.sh

# /tomcat2/bin/startup.sh

分别访问 http://localhost:8080/test1与http://localhost:8090/test2 验证是否正常

重启 nginx

# /usr/local/nginx/sbin/nginx -s reload

打开浏览器输入：http://localhost/test 多刷新几次，就会看到请求回来的内容有时不一样。说明，nginx 是随机访问的tomcat1或者tomcat2

配置文件里面的weight哪个数值越大，请求到的次数就会多。