nginx错误:(99:无法分配请求的地址)

Question

我正在运行Ubuntu Hardy 8.04和nginx 0.7.65,当我尝试启动我的nginx服务器时:

$ sudo /etc/init.d/nginx start

我收到以下错误:

Starting nginx: [emerg]: bind() to IP failed (99: Cannot assign requested address)

其中"IP"是我的IP地址的占位符.有人知道为什么会发生错误吗？这是在EC2上运行的.

我的nginx.conf文件如下所示:

user www-data www-data;
worker_processes  4;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    access_log /usr/local/nginx/logs/access.log;

    sendfile        on;
    tcp_nopush      on;
    tcp_nodelay         on;

    keepalive_timeout  3;

    gzip  on;
    gzip_comp_level 2;
    gzip_proxied any;
    gzip_types  text/plain text/css application/x-javascript text/xml application/xml
    application/xml+rss text/javascript;

    include /usr/local/nginx/sites-enabled/*;

}

我的/usr/local/nginx/sites-enabled/example.com看起来像:

server {

        listen   IP:80;
        server_name  example.com;
        rewrite ^/(.*) https://example.com/$1 permanent;

       }

server {

        listen   IP:443 default ssl;

        ssl         on;
        ssl_certificate     /etc/ssl/certs/myssl.crt;
        ssl_certificate_key /etc/ssl/private/myssl.key;

        ssl_protocols       SSLv3 TLSv1;
        ssl_ciphers ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:-LOW:-SSLv2:-EXP;

        server_name example.com;

        access_log /home/example/example.com/log/access.log;
        error_log /home/example/example.com/log/error.log;

        }

Answer 1

使用Amazon EC2和弹性IP,服务器实际上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

在重新启动时会很好.

Answer 2

要避免在配置中对IP地址进行硬编码,请执行以下操作:

listen *:80;
listen [::]:80;

Answer 3

正如 kirpit 上面提到的，您需要允许 linux 进程绑定到本地 IP 地址：

nano /etc/sysctl.conf

# allow processes to bind to the non-local address
net.ipv4.ip_nonlocal_bind = 1

sysctl -p /etc/sysctl.conf

然后您需要添加与您的弹性 IP 关联的私有 IP 地址并将其添加到您的站点配置中：

nano /etc/nginx/sites-available/example.com

重新加载 nginx：

service nginx reload

全做完了！

Answer 4

可能还有剩余的进程/程序正在使用/侦听端口 80。

您可以使用 netstat -lp 进行检查。杀死该进程并启动 nginx。