Starting nginx without checking for upstream server availability

John Kemp john at
Fri Jan 23 22:55:03 MSK 2009

On Jan 23, 2009, at 2:09 PM, Igor Sysoev wrote:

> On Fri, Jan 23, 2009 at 12:56:14PM -0500, John Kemp wrote:
>> I am using nginx in a reverse-proxy situation, with several upstream
>> servers on different networks.
>> I am often testing parts of my server without access to some of the
>> upstream servers. When I try to start nginx and even a single  
>> upstream
>> server is unavailable, I get the message:
>>> comp:blah johnk$ sudo /usr/local/sbin/nginx
>>> 2009/01/23 10:24:22 [emerg] 4894#0: host not found in upstream
>>> "xxx.yyy.zzz" in /usr/local/nginx//conf/nginx.conf:18
>> And nginx is not started.
>> Although I like configuration checking, I'd also like to be able to
>> start nginx even when one or more upstream servers are down. Is there
>> a way to do that? I couldn't see a command-line option to do so, or
>> anything that looked relevant in the config file examples on the  
>> wiki.
>> I am using nginx 0.7.30, compiled from source on OS X.
> One of the way  - to use IP addresses.

Is there a way to disable on-startup host lookup altogether (other  
than making a code change)?

- johnk

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