keepalive seems not to work

[Łukasz Tasz]

Hi,
sucha setup is on 1stproxy, there I have upstream defined to second proxy
and it works - connection is reused.
problem is that it is chain of forward proxy with caching, and
your-server.com including port is different  - service:port is dynamic.
I'm asking for it, because with firefox (set global proxy to my second
proxy) I go to some blabla.your-server.com connection is kept
in a meaning that on server side I see only one established connection, and
all of requests that I make from firefox are made over this keept
connection. Problem starts when I will use chain of proxies (all nginx).

regards
Łukasz Tasz
RTKW


czw., 8 paź 2020 o 11:43 Marcin Wanat <marcin.wanat at gmail.com> napisał(a):

>
> On Thu, Oct 8, 2020 at 11:36 AM Łukasz Tasz <lukasz at tasz.eu> wrote:
>
>> Hi all,
>>
>> can I expect that proxy_pass will keep connection to remote server that
>> is being proxied?
>>
>> when I'm using setup client -> proxy -> server it looks to work
>> but when I'm using:
>> client -> 1stProxy_upstream -> proxy -> server
>> connection between 1stProxy and proxy is being kept thanks to keepalive
>> 100, but proxy makes new connection every new request, very simple setup:
>>
>> http {
>>   server {
>>     listen 8080;
>>     location / {
>>       keepalive_disable none;
>>       keepalive_requests 1000;
>>       keepalive_timeout 300s;
>>       proxy_cache proxy-cache;
>>       proxy_cache_valid 200 302 301 30m;
>>       proxy_cache_valid any 1m;
>>       proxy_cache_key $scheme://$http_host$request_uri;
>>       proxy_pass $scheme://$http_host$request_uri;
>>       proxy_http_version 1.1;
>>       proxy_set_header Connection "";
>>     }
>>   }
>> }
>> I would expect that when client connects proxy and it works then it
>> should also works when proxy connects upstream proxy....
>>
>
> For keepalive in upstream proxy you shoud use upstream configuration block
> and configure keepalive in it:
>
> upstream backend {
>    zone backend 1m;
>    server your-server.com;
>    keepalive 128;
> }
>
>   server {
>     listen 8080;
>     location / {
>       proxy_cache proxy-cache;
>       proxy_cache_valid 200 302 301 30m;
>       proxy_cache_valid any 1m;
>       proxy_cache_key $scheme://$http_host$request_uri;
>       proxy_pass $scheme://backend$request_uri;
>       proxy_http_version 1.1;
>       proxy_set_header Connection "";
>     }
>   }
>
> --
> Marcin Wanat
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> nginx at nginx.org
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