Nginx1.1实现Resin4集群
一，web服务器小论
以前的公司使用的web服务器是tomcat（tomcat+apache作集群）,现在的公司是一家互联网公司，采用的架构是resin+nginx作集群(resin比tomcat快？还有待以后章节比较讨论)，
集群配置服务器说明：
1),serve1:127.0.0.1:8080
2), serve2:127.0.0.1:8081
3), nginx:127.0.0.1:80
二，配置resin服务器
(注：resin4之前，可以搭一个服务器，在<cluster></cluster>中配置多个server实例，通过实例启动，4.0之后就不可以了，要有专业版才能实现)
在安装resin之前，必须先安装完jvm环境。
serve1:127.0.0.1:8080--->
1，安装resin-4.0.*.tar.gz包
shell $> tar zxvf resin-4.0.23.tar.gz shell $> cd resin-4.0.23 shell $> ./configure --prefix=/usr/resin/resinserver1/resinserver1/ shell $> make shell $> make install
2，配置resin.conf文件
shell $> cd /usr/resin/resinserver1/resinserver1/
shell $> cd conf
shell $> vim resin.conf
## 查找 <http address="*" port="8080"/>
## 注释掉 <!--http address="*" port="8080"/-->
## 查找 <server id="" address="127.0.0.1" port="6800">
## 替换成
<server id="resinserver1" address="127.0.0.1" port="6800">
<!--两台服务器配置不同的watchdog端口，否则会出现异常-->
<watchdog-port>6700</watchdog-port>
<http id="" port="8080"/>
</server>
###重启 resin 服务#####
shell $> cd ../bin
shell $>./resin.sh -server resinserver1 start
serve1:127.0.0.1:8081--->
---1,
shell $> tar zxvf resin-4.0.23.tar.gz shell $> cd resin-4.0.23 shell $> ./configure --prefix=/usr/resin/resinserver2/resinserver2/ shell $> make shell $> make install
2,配置resin
shell $> cd conf
shell $> vim resin.conf
## 查找 <http address="*" port="8080"/>
## 注释掉 <!--http address="*" port="8080"/-->
## 查找 <server id="" address="127.0.0.1" port="6800">
## 替换成
<server id="resinserver2" address="127.0.0.1" port="6801">
<!--两台服务器配置不同的watchdog端口-->
<watchdog-port>6701</watchdog-port>
<http id="" port="8081"/>
</server>
###重启 resin 服务#####
shell $> cd ../bin
shell $>./resin.sh -server resinserver2 start
通过以上配置，开启两台resin服务器,接下来就是配置nginx
三，nginx的配置
nginx安装需要以下软件包安装
1,nginx-1.1.5.tar.gz
2,tbje-nginx-upstream-jvm-route-6016b39.tar.gz
3,openssl-1.0.0e.tar.gz(OPENSSL不需要编译安装，只需要解压出来就行)
分别解压以上程序...
shell $> cd nginx-1.1.5 shell $> patch -p0 < ../tbje-nginx-upstream-jvm-route-6016b39/jvm_route.patch shell $> useradd www shell $> ./configure --user=www --group=www --prefix=/usr/nginx/nginxserver --with-http_stub_status_module --with-http_ssl_module=/usr/nginx/openssl-1.0.0e --add-module=/usr/nginx/tbje-nginx-upstream-jvm-route-6016b39 shell $> make shell $> make install
到nginxserver/sbin目录下，，运行./nginx 访问http://127.0.0.1 出现“webcome to nginx”代表nginx安装成功
四，配置集群
打开nginxserver/conf/nginx.conf文件。
user www www;#工作进程的属主
worker_processes 2;#工作进程数，一般与 CPU 核数等同
error_log logs/error.log crit;
#error_log logs/error.log notice;
#error_log logs/error.log info;
pid logs/nginx.pid;
events {
worker_connections 1024;#每个工作进程允许最大的同时连接数
}
http {
upstream backend {#集群服务器
server 127.0.0.1:8080 srun_id=resinserver1;
server 127.0.0.1:8081 srun_id=resinserver2;
jvm_route $cookie_JSESSIONID|sessionid;#session共享
}
include mime.types;#内定义各文件类型映像，也可使用
default_type application/octet-stream;#设置默认类型是二进制流
#log_format main '$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;#打开gzip文件压缩
server {
listen 80;
server_name localhost;
charset UTF-8;
#下面为location的配置，可以根据自己的业务情况进行定制
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
#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;
}
location ~ .*\.jsp$
{
proxy_pass http://backend;
proxy_redirect off;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443;
# server_name localhost;
# ssl on;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_timeout 5m;
# ssl_protocols SSLv2 SSLv3 TLSv1;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
nginx命令：
start nginx 开启nginx Nginx -s stop 快速关闭Nginx，可能不保存相关信息，并迅速终止web服务。（quick exit） Nginx -s quit 平稳关闭Nginx，保存相关信息，有安排的结束web服务。（graceful exit） Nginx -s reload 因改变了Nginx相关配置，需要重新加载配置而重载。（changing configuration，start a new worker,quitting an old worker gracefully.) Nginx -s reopen 重新打开日志文件。(reopenging log files)
上面两resin的服务器已经打开，更改两服务器下的如(resinserver1)：/usr/resin/resinserver1/resinserver1/webapps/ROOT 下的index.jsp
区别服务器访问路径：
<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
%>
<html>
<head>
</head>
<body>
nginxserver1<!--在另一台服务器上写nginxserver2-->
<br />
<%out.print(request.getSession()) ;%>
<br />
<%out.println(request.getHeader("Cookie")); %>
</body>
</html>
这时重启nginx
这时访问：http://127.0.0.1/index.jsp会出现以下情况：
比较 resinserver1-----> nginxserver1 SessionImpl[aaadbhbcljrab7wtdprmt,] JSESSIONID=aaadbhbcljrab7wtdprmt 或者 resinserver2-----> nginxserver2 SessionImpl[aaadbhbcljrab7wtdprmt,] JSESSIONID=aaadbhbcljrab7wtdprmt