Nginx ssl offload for Tomcat in SmartOS

本篇的目的主要在使用Nginx Reverse Proxy的功能來卸載HTTPS SSL
也就是說Tomcat走HTTP 8080 Port,本身無HTTPS SSL
然後透過Nginx來加上HTTPS SSL,提供HTTPS服務於443 Port上
環境以MiCloud SmartOSPlus64為主

Environment
# uname -a
SunOS MiCloudDBT.local 5.11 joyent_20120808T224832Z i86pc i386 i86pc Solaris

Installation
# pkgin -y in nginx-1.0.4 apache-tomcat-6.0.32 sun-jdk6-6.0.26 

Servers
Tomcat server: 123.123.123.123 (Port: 8080)
Nginx server: 123.123.123.123 (Port: 80, 443)

Nginx Configure (/opt/local/etc/nginx/nginx.conf)
# 說明 - 此部份設定主要包含:
# 1. 建立tomcat - nginx upstream設定
# 2. 設定Nginx https server over 443 port,並指定ssl key
# 3. 設定欲轉址的Tomcat context(ex: http://123.123.123.123:8080/examples/ --> https://123.123.123.123/examples/)
# ps: http 80段落的設定(紫色),是強制將http 80的所有request轉導至https,必須有這個設定,不然每個tomcat的link都會被導到http而非https
user   www  www;
worker_processes  1;
events {
    worker_connections  1024;
}
http {
    include       /opt/local/etc/nginx/mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    upstream tomcat_server {
        server 123.123.123.123:8080 fail_timeout=0;
    }
    server {
        listen 80;
        rewrite ^(.*) https://$host$1 permanent;
    }
    server {
        listen       443;
        ssl on;
        ssl_certificate /opt/local/etc/openssl/private/selfsigned.pem;
        ssl_certificate_key /opt/local/etc/openssl/private/selfsigned.pem;
        ssl_prefer_server_ciphers on;
        location / {
            root   share/examples/nginx/html;
            index  index.html index.htm;
        }
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   share/examples/nginx/html;
        }
        location /examples {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-Forwarded-Proto https;
            proxy_redirect off;
            proxy_connect_timeout      240;
            proxy_send_timeout         240;
            proxy_read_timeout         240;
            proxy_pass http://tomcat_server;
        }
    }
}

Tomcat Configure (/opt/local/share/tomcat/conf/server.xml)
<!--
設定tomcat 8080 port的reverse proxy轉導的port
如設定port number,則不會直接轉到該port,而不會有協定上的改變(ex: 會變成 http://123.123.123.123:443/examples)
如設定https,則可以直接走預設443 port的HTTPS SSL 
-->
<Connector port="8080" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" 
               proxyPort="https" />

Test
瀏覽器連線:https://123.123.123.123/examples/