Nginx 0.8.4 Trying to bind on port 80 ?

[Jim Ohlstein]

olefebvre Wrote:
-------------------------------------------------------
> No !!! As i wrote on the first page the setup is
> as follow:
> IPTABLES roots external access to port 80 to port
> 8080 which is NGinx Listening Port.
> From then on either NGinx serves all the pages or
> proxy them to Apache depending on which Vhost is
> considered. So it's really Nginx proxying to
> Apache not the other way round. With this setup i
> can simply remove Nginx by just erasing the
> IPTABLES rule.
> 
> 
> This setup has not been changed for months, and it
> works for every Nginx iteration up to 0.8.3, but
> fail with bind error on the 0.8.4 release.

Are you certain that your nginx.conf has not been overwritten or the path changed with your latest configuration?

On a Linux test server I set Apache to listen on 80. I compiled nginx-0.8.4 from source with the following very basic configure command:


# nginx -V
nginx version: nginx/0.8.4
built by gcc 4.1.2 20080704 (Red Hat 4.1.2-44)
configure arguments: --pid-path=/usr/local/nginx/logs/nginx.pid --sbin-path=/usr/local/sbin/nginx --with-http_stub_status_module --user=nginx --group=nginx


I used the default nginx.conf with the exception that I changed the "listen" directive from

listen 80;

to 

listen 8080;

I started Apache and it grabbed 80:


# service httpd start
Starting httpd: [  OK  ]
# lsof -i tcp:80
COMMAND   PID   USER   FD   TYPE DEVICE SIZE NODE NAME
httpd   13767   root    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13769 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13770 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13771 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13772 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13773 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13774 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13775 apache    4u  IPv6  84950       TCP *:http (LISTEN)
httpd   13776 apache    4u  IPv6  84950       TCP *:http (LISTEN)


I then started nginx and it grabbed 8080:

# /usr/local/sbin/nginx
# lsof -i tcp:8080
COMMAND   PID  USER   FD   TYPE DEVICE SIZE NODE NAME
nginx   13779  root    6u  IPv4  85204       TCP *:webcache (LISTEN)
nginx   13780 nginx    6u  IPv4  85204       TCP *:webcache (LISTEN)


I then edited nginx.conf to have nginx listen on 80 and attempted a reload. It failed. Output from error log:

2009/06/28 20:09:54  13787#0: signal process started
2009/06/28 20:09:54  13779#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2009/06/28 20:09:54  13779#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2009/06/28 20:09:54  13779#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2009/06/28 20:09:54  13779#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2009/06/28 20:09:54  13779#0: bind() to 0.0.0.0:80 failed (98: Address already in use)
2009/06/28 20:09:54  13779#0: still could not bind()


The most logical conclusion is that with your latest compile the path to nginx.conf was changed or nginx.conf was overwritten.

Please post the output of

# nginx -V

(for both nginx-0.8.3 and nginx-0.8.4)

and the contents of nginx.conf file that is specified by each.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,3498,3509#msg-3509