Hello!

On Sun, Jun 29, 2014 at 06:15:56PM -0300, Bráulio Bhavamitra wrote:

> Hello all,
>
> I stucked a while with a config problem where proxy_cache_key default value
> was $scheme$proxy_host$uri$is_args$args".
>
> Then I realized it really didn't make. A better value
> $scheme$host$uri$is_args$args" is much more reasonable, as the reverse
> proxy requests comes from many server {} with multiple server name and
> aliases.
>
> Shouldn't the default be changed?

The default key is to identify resources nginx requests from
upstream servers. That is, these are the same:

server {
server_name bar;

location / {
proxy_pass http://foo.example.com;
}
}

server {
server_name bazz;

location / {
proxy_pass http://foo.example.com;
}
}

While these are different:


server {
server_name foo;

location / {
set $backend "foo.example.com";

if ($user_is_admin) {
set $backend "admin.example.com";
}

proxy_pass http://$backed;
}
}


If in your case multiple such resources are equal or different
based on other factors (likely, due to "proxy_set_header Host ..."
in your configuration), you are free to change proxy_cache_key
accordingly.

--
Maxim Dounin
http://nginx.org/

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