关于nginx配置文件测试的问题

最近在配置nginx时，发现了一个问题，是关于nginx配置文件测试的。

如下的nginx配置，在upstream没有配置的情况下：

    location /frontend-gateway/ {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        set $globalTicket $pid--$remote_addr-$request_length-$connection;
        proxy_set_header globalTicket $globalTicket;

        proxy_pass http://o2o-frontend-gateway/;
    }

我们通过nginx -t测试可以发现，是可以测试通过的。

[root@sh-o2o-nginx-router-online-04 vhost.d]# /usr/local/nginx/sbin/nginx -t
the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
configuration file /usr/local/nginx/conf/nginx.conf test is successful

照说要报错才对。初步怀疑是把o2o-frontend-gateway当成一个域名了？

我们把o2o-frontend-gateway改成o2o_frontend-gateway，发现可以测试通过。

    location /frontend-gateway/ {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        set $globalTicket $pid--$remote_addr-$request_length-$connection;
        proxy_set_header globalTicket $globalTicket;

        proxy_pass http://o2o_frontend-gateway/;
    }

[root@sh-o2o-nginx-router-online-04 vhost.d]# /usr/local/nginx/sbin/nginx -t
nginx: [emerg] host not found in upstream "o2o_frontend-gateway" in /usr/local/nginx/conf/vhost.d/o2o.huilog.com.conf:144
configuration file /usr/local/nginx/conf/nginx.conf test failed

结论：在配置nginx的upstream时，upstream最好不要使用-，可用下划线代替。 nginx版本：Tengine version: Tengine/2.1.2 (nginx/1.6.2)

关于nginx配置文件测试的问题

阿辉