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

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

安裝 tomcat 為測試Nginx反向代理

1.下載

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

2.解壓

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

3.啟動測試

# cd /apache-tomcat-8.0.48/bin

# ./startup.sh

1. [[email protected] bin]# ./startup.sh   
2. Using CATALINA_BASE:   /usr/software/apache-tomcat-8.0.48  
3. Using CATALINA_HOME:   /usr/software/apache-tomcat-8.0.48  
4. Using CATALINA_TMPDIR: /usr/software/apache-tomcat-8.0.48/temp  
5. Using JRE_HOME:        /usr/java/jdk1.8.0_121/jre  
6. Using CLASSPATH:       /usr/software/apache-tomcat-8.0.48/bin/bootstrap.jar:/usr/software/apache-tomcat-8.0.48/bin/tomcat-juli.jar  
7. Tomcat started.  

4.開啟 nginx的配置檔案

# cd /usr/local/nginx/conf

複製一份配置檔案 命名為： nginx.conf.bak

#cp nginx.conf nginx.conf.bak

# vim nginx.conf

找到： location / 處，新增：  proxy_pass http://localhost:8080; http://localhost:8080;為tomcat的訪問路徑

1. server {  
2.   <strong>  listen       80; #nginx的監聽埠
   </strong>
3.     server_name  localhost;  
4.     #charset koi8-r;  
5.     #access_log  logs/host.access.log  main;  
6.     location / {  
7.         root   html;  
8.         index  index.html index.htm;  
9.      <spanstyle="color:#cc0000;">   proxy_pass http://localhost:8080;</span>
10.     }  
11.     #error_page  404              /404.html;  
12.     # redirect server error pages to the static page /50x.html  
13.     #  
14.     error_page   500 502 503 504  /50x.html;  
15.     location = /50x.html {  
16.         root   html;  
17.     }  

修改之後，儲存。重啟nginx

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

訪問：http://localhost:80 即可訪問 tomcat的路徑

四、Nginx 負載均衡

1.此處需要部署兩個tomcat 進入到第四步下載的tomcat的路徑下

# cp -r apache-tomcat-8.0.48 tomcat1

# cp -rapache-tomcat-8.0.48 tomcat2

2.修改tomcat配置檔案

tomcat1 埠設定為8080 ；tomcat1的配置無需修改

tomcat2 埠設定為8090

# cd /tomcat2/conf

# vim server.xml

修改

<Server port="8005" shutdown="SHUTDOWN">

為：<Server port="8015" shutdown="SHUTDOWN">

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

為：<Connector port="8090" protocol="HTTP/1.1" connectionTimeout="20000"  redirectPort="8443" />

<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

為： <Connector port="8019" protocol="AJP/1.3" redirectPort="8443" />

3.在tomcat1和tomcat2下建立測試站點

# cd /tomcat1/webapp

# madir test

# vi index.html

新增

this is tomcat1 index

esc ：wq 儲存推出。

同理在tomcat2下建立test與indexhtml，新增this is tomcat2 index

# cd /tomcat2/webapp

# madir test

# vi index.html

新增

this is tomcat2 index

esc ：wq 儲存推出。

同時為便於識別，修改監聽8081埠的Tomcat的root目錄下的index.jsp頁面，將首頁中的“
If you're seeing this, you've successfully installed Tomcat. Congratulations!”

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

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

1. http {  
2.     include       mime.types;  
3.     default_type  application/octet-stream;  
4.     #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '  
5.     #                  '$status $body_bytes_sent "$http_referer" '  
6.     #                  '"$http_user_agent" "$http_x_forwarded_for"';  
7.     #access_log  logs/access.log  main;  
8.     sendfile        on;  
9.     #tcp_nopush     on;  
10.     #keepalive_timeout  0;  
11.     keepalive_timeout  65;  
12.     #gzip  on;  
13.     <spanstyle="color:#ff0000;">upstream mytomcat {  
14.         server localhost:8080 weight=100;  
15.         server localhost:8090 weight=110;  
16.     }</span>

1. server {  
2.     listen       80;  
3.     server_name  <spanstyle="color:#ff0000;">mytomcat</span>;  
4.     #charset koi8-r;  
5.     #access_log  logs/host.access.log  main;  
6.     location / {  
7.         root   html;  
8.         index  index.html index.htm;  
9.        <spanstyle="color:#ff0000;"> proxy_pass http://mytomcat;</span>
10.     }  
11.     #error_page  404              /404.html;  
12.     # redirect server error pages to the static page /50x.html  
13.     #  
14.     error_page   500 502 503 504  /50x.html;  

分別啟動tomcat1與tomcat2

# /tomcat1/bin/startup.sh

# /tomcat2/bin/startup.sh

分別訪問 http://localhost:8080/test1與http://localhost:8090/test2 驗證是否正常

重啟 nginx

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

開啟瀏覽器輸入：http://localhost/test 多重新整理幾次，就會看到請求回來的內容有時不一樣。說明，nginx 是隨機訪問的tomcat1或者tomcat2

配置檔案裡面的weight哪個數值越大，請求到的次數就會多。