nginx 安装过程略过，新手可参考 nginx安装教程 本次主要记录下nginx配置文件的设置过程
nginx 的 配置文件nginx.conf 可以配置多个端口：
复制一个 server{ //code } 代码块 修改端口即可
如下配置文件中 nginx 启动后，可访问以下两个端口。
修改后配置文件后 ，访问 http://ip:10088 和 http://ip:10087 均可请求到nginx服务。
1、10088端口 配置反向代理，消除跨域问题。
在 server { //code} 中添加如下代码 则可以添加一个Tomcat 服务的反向代理。
原始访问tomcat 的路径 为 http://ip:8582/ncms 在 nginx 配置文件中加入以下代码 后，则可以通过 http://ip:10088/ncms 访问到 tomcat的服务。
这对于在一台服务器上发布多个tomcat时 统一的地址端口+不同项目，可以完美绕开跨域问题。
location /ncms {
proxy_pass http://127.0.0.1:8582;
proxy_set_header Host $host:10088;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
2、10087端口 配置ip_hash模式的负载均衡，ip_hash可以绕开解决session共享的问题。
目前许多应用均为多节点部署。
例如：同一个java Web应用 部署了4个 Tomcat 服务，把tomcat原始访问地址+端口配置成如下模式， weight为权重。
以下配置模式表示 server 10.174.25.213:8582 weight=6 有60%的概率处理客户端请求。
用ip_hash表示 客户端的请求被分配到某一服务器上， 直到会话退出始终会请求该服务器，这样用户请求就不会再被分配到其他服务器导致 session 失效的问题。
upstream tomcatsncms {
server 10.174.25.213:8582 weight=6;
server 10.174.25.45:8582 weight=1;
server 10.174.25.48:8582 weight=1;
server 10.174.25.49:8582 weight=1;
ip_hash;
}
在 server{ //code }中添加如下代码 配置外网访问的端口， 这样 用户再次请求 http://ip+10087/ncms 时 实际会去被分配到后台部署的4台server中去 ，
值得一提的是如果某一台tomcat服务器宕机或者停机维护，都不会影响正常服务。
负载均衡不仅分流的前台用户的请求到不同的机器，而且如果某一个节点坏死会自动判断把请求分流到正常的tomcat服务器上。
location /ncms {
proxy_pass http://tomcatsncms;
proxy_set_header Host $host:10087;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
附一份修改配置后完整的nginx.conf具体配置文件如下：
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$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;
upstream tomcatsncms {
server 10.174.25.213:8582 weight=6;
server 10.174.25.45:8582 weight=1;
server 10.174.25.48:8582 weight=1;
server 10.174.25.49:8582 weight=1;
ip_hash;
}
upstream tomcatsfir {
server 10.174.25.213:8583 weight=6;
server 10.174.25.45:8583 weight=1;
server 10.174.25.48:8583 weight=1;
server 10.174.25.49:8583 weight=1;
ip_hash;
}
server {
listen 10087;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
location /ncms {
proxy_pass http://tomcatsncms;
proxy_set_header Host $host:10087;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
location /fir {
proxy_pass http://tomcatsfir;
proxy_set_header Host $host:10087;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# 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;
#}
}
server {
listen 10088;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
location /ncms {
proxy_pass http://127.0.0.1:8582;
proxy_set_header Host $host:10088;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
location /fir {
proxy_pass http://127.0.0.1:8582;
proxy_set_header Host $host:10088;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
location /docs {
proxy_pass http://127.0.0.1:8582;
proxy_set_header Host $host:10088;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Via "nginx";
client_max_body_size 50m;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# 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 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}