nginx 出现Cannot assign requested address问题分析

fenghuoliuxing0

2019-02-14

问题描述：

2019/02/14 15:45:30 [crit] 12608#0: *109984486 connect() to 127.0.0.1:80 failed (99: Cannot assign requested address) while connecting to upstream, client: 127.0.0.1, server: localhost, request: "GET /picture/554495.jpg HTTP/1.0", upstream: "http://127.0.0.1:80/picture/554495.jpg", host: "127.0.0.1"

nginx报这个错

nginx配置：如下

location ~* /picture\/(\d+)\.(gif|jpg|jpeg|png)$ {

expires 24h;

root /picture/;#指定图片存放路径

access_log /usr/local/nginx/logs/images.log;#日志存放路径

proxy_store on;

proxy_store_access user:rw group:rw all:rw;

proxy_temp_path /picture/;#图片访问路径

proxy_redirect off;

proxy_set_header Host 127.0.0.1;

client_max_body_size 10m;

client_body_buffer_size 1280k;

proxy_connect_timeout 900;

proxy_send_timeout 900;

proxy_read_timeout 900;

proxy_buffer_size 40k;

proxy_buffers 40 320k;

proxy_busy_buffers_size 640k;

proxy_temp_file_write_size 640k;

if ( !-e $request_filename)

{

proxy_pass http://127.0.0.1;#默认80端口

}

原因分析：原有的80端口请求已经太多，有大量的socket连接没有释放，图片请求访问仍然去访问80端口

只有不让访问80端口就可以不报这个错误了

网上解决办法（使用这个方法之后还是会报错）

使用Amazon EC2和弹性IP，服务器并不像大多数其他服务器那样知道其IP。

所以你需要告诉你的linux允许进程绑定到非本地地址。只需将以下行添加到/etc/sysctl.conf文件中：

# allow processes to bind to the non-local address
# (necessary for apache/nginx in Amazon EC2)
net.ipv4.ip_nonlocal_bind = 1

然后通过以下方式重新加载sysctl.conf：

$ sysctl -p /etc/sysctl.conf

重新启动就行了：

-----

最后将以下代码注释掉就没错了

if ( !-e $request_filename)

{

proxy_pass http://127.0.0.1;#默认80端口

}

----------

http://dev.cbs.bacic5i5j.com/picture/554495.jpg 再次访问的时候报

2019/02/14 16:13:05 [error] 13308#0: *110623237 open() "/picture/picture/554495.jpg" failed (2: No such file or directory), client: 10.1.20.35, server: localhost, request: "GET /picture/554495.jpg HTTP/1.1", host: "dev.cbs.bacic5i5j.com"

发现图片路径后面多了一个picture

root /picture/;#指定图片存放路径

把这个改成 root /;

就可以了

最后完成的nginx配置如下

location ~*  /picture\/(\d+)\.(gif|jpg|jpeg|png)$ {  
			expires 24h;  
            root /;#指定图片存放路径  
            access_log /usr/local/nginx/logs/images.log;#日志存放路径  
            proxy_store on;  
            proxy_store_access user:rw group:rw all:rw;  
            proxy_temp_path         /picture/;#图片访问路径  
            proxy_redirect          off;  
            proxy_set_header        Host 127.0.0.1;  
            client_max_body_size    10m;  
            client_body_buffer_size 1280k;  
            proxy_connect_timeout   900;  
            proxy_send_timeout      900;  
            proxy_read_timeout      900;  
            proxy_buffer_size       40k;  
            proxy_buffers           40 320k;  
            proxy_busy_buffers_size 640k;  
            proxy_temp_file_write_size 640k;  
            #if ( !-e $request_filename)  
            #{  
            #     proxy_pass  http://127.0.0.1;#默认80端口  
            #}    
       }

nginx 80端口