反向代理

在計算機世界里，由于單個服務器的處理客戶端（用戶）請求能力有一個極限，當用戶的接入請求蜂擁而入時，會造成服務器忙不過來的局面，可以使用多個服務器來共同分擔成千上萬的用戶請求，這些服務器提供相同的服務，對于用戶來說，根本感覺不到任何差別。

nginx做前端代理分發，tomcat處理請求。nginx反代tomcat實現https有二個方法。

一、nginx配置https，tomcat也配置https

1、nginx配置https

upstream https_tomcat_web {   server 127.0.0.1:8443; } server {   listen  443;   server_name www.test.com;   index index.html;   root /var/www/html/test;   ssl on;   ssl_certificate /etc/nginx/go.pem;   ssl_certificate_key /etc/nginx/go.key;   ssl_session_timeout 5m;   ssl_protocols SSLv2 SSLv3 TLSv1.2; #  ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;   ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;   ssl_prefer_server_ciphers on;   location ~ ^/admin {    proxy_pass https://https_tomcat_web; //是https的    proxy_redirect      off;    proxy_set_header Host    $host;    proxy_set_header X-Real-IP  $remote_addr;    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;    client_max_body_size  100m;    client_body_buffer_size 256k;    proxy_connect_timeout  60;    proxy_send_timeout   30;    proxy_read_timeout   30;    proxy_buffer_size   8k;    proxy_buffers    8 64k;    proxy_busy_buffers_size 64k;    proxy_temp_file_write_size 64k;   }   error_page 404 /404.html;   location = /40x.html {   }   error_page 500 502 503 504 /50x.html;   location = /50x.html {   } } 

2、tomcat的https配置,配置文件server.xml

<Service name="Catalina">  <Connector port="8001" protocol="HTTP/1.1"  connectionTimeout="20000"  redirectPort="8443" />  <Connector port="8091"  protocol="AJP/1.3"  redirectPort="8443" /> //添加以下內容  <Connector port="8443"  protocol="HTTP/1.1"  SSLEnabled="true"  scheme="https"  secure="false"  keystoreFile="cert/gotom.pfx"  keystoreType="PKCS12"  keystorePass="214261272770418"  clientAuth="false"  SSLProtocol="TLSv1+TLSv1.1+TLSv1.2" ciphers="TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_128_CBC_SHA256,TLS_RSA_WITH_AES_256_CBC_SHA256" />   ..................省略....................  </Service> 

配置好后重新啟動nginx，tomcat，就可以https訪問了，這也是我現在采用的配置方式 。

二、nginx采用https，tomcat采用http

1、nginx配置https

upstream https_tomcat_web {   server 127.0.0.1:8001; } server {   listen  443;   server_name www.test.com;   index index.html;   root /var/www/html/test;   ssl on;   ssl_certificate /etc/nginx/go.pem;   ssl_certificate_key /etc/nginx/go.key;   ssl_session_timeout 5m;   ssl_protocols SSLv2 SSLv3 TLSv1.2; #  ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;   ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;   ssl_prefer_server_ciphers on;   location ~ ^/admin {    proxy_pass http://https_tomcat_web; //是http的    proxy_redirect      off;    proxy_set_header Host    $host;    proxy_set_header X-Real-IP  $remote_addr;    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;    client_max_body_size  100m;    client_body_buffer_size 256k;    proxy_connect_timeout  60;    proxy_send_timeout   30;    proxy_read_timeout   30;    proxy_buffer_size   8k;    proxy_buffers    8 64k;    proxy_busy_buffers_size 64k;    proxy_temp_file_write_size 64k;   }   error_page 404 /404.html;   location = /40x.html {   }   error_page 500 502 503 504 /50x.html;   location = /50x.html {   } }