这些模块都很实用， ngx_http_upstream_check_module 可以检查后端服务器的状态
代码语言：javascript复制[root@i-1avyrt2d nginx.old]# /usr/local/nginx/sbin/nginx -m 2>&1 | grep upstream
ngx_http_upstream_module (static)
ngx_http_upstream_ip_hash_module (static)
ngx_http_upstream_consistent_hash_module (static)
ngx_http_upstream_check_module (static)
ngx_http_upstream_least_conn_module (static)
ngx_http_upstream_keepalive_module (static)
ngx_http_upstream_dynamic_module (static)
ngx_http_upstream_session_sticky_module (static)
[root@i-1avyrt2d nginx.old]# /usr/local/nginx/sbin/nginx -m 2>&1 | grep upstream | grep check
ngx_http_upstream_check_module (static)
[root@i-1avyrt2d nginx.old]# 代码语言：javascript复制Tip: 官方版本的没有 -m 选项，不能方便的列出加载的模块
[root@i-1avyrt2d nginx.old]# sbin/nginx -h
nginx version: nginx/1.9.6
Usage: nginx [-?hvVtTq] [-s signal] [-c filename] [-p prefix] [-g directives]
Options:
-?,-h : this help
-v : show version and exit
-V : show version and configure options then exit
-t : test configuration and exit
-T : test configuration, dump it and exit
-q : suppress non-error messages during configuration testing
-s signal : send signal to a master process: stop, quit, reopen, reload
-p prefix : set prefix path (default: /usr/local/nginx/)
-c filename : set configuration file (default: conf/nginx.conf)
-g directives : set global directives out of configuration file
[root@i-1avyrt2d nginx.old]# sbin/nginx -v
nginx version: nginx/1.9.6
[root@i-1avyrt2d nginx.old]# sbin/nginx -V
nginx version: nginx/1.9.6
built by gcc 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC)
configure arguments:
[root@i-1avyrt2d nginx.old]# 从目录结构可以看到，多了不少东西， nginx.old 是官方版本
代码语言：javascript复制[root@i-1avyrt2d nginx]# ll /usr/local/nginx
total 44
drwx------ 2 nginx root 4096 Nov 4 14:17 client_body_temp
drwxr-xr-x 3 root root 4096 Nov 4 16:09 conf
drwx------ 2 nginx root 4096 Nov 4 14:17 fastcgi_temp
drwxr-xr-x 2 root root 4096 Nov 4 14:15 html
drwxr-xr-x 2 root root 4096 Nov 4 14:15 include
drwxr-xr-x 2 root root 4096 Nov 4 16:10 logs
drwxr-xr-x 2 root root 4096 Nov 4 14:15 modules
drwx------ 2 nginx root 4096 Nov 4 14:17 proxy_temp
drwxr-xr-x 2 root root 4096 Nov 4 14:15 sbin
drwx------ 2 nginx root 4096 Nov 4 14:17 scgi_temp
drwx------ 2 nginx root 4096 Nov 4 14:17 uwsgi_temp
[root@i-1avyrt2d nginx]# ll /usr/local/nginx.old/
total 16
drwxr-xr-x 3 root root 4096 Nov 4 10:37 conf
drwxr-xr-x 2 root root 4096 Nov 4 10:22 html
drwxr-xr-x 2 root root 4096 Nov 4 13:09 logs
drwxr-xr-x 2 root root 4096 Nov 4 10:22 sbin
[root@i-1avyrt2d nginx]# 
