Nginx caching proxy dns name even when using variables

[Rob Fulton]

Hi,

I’ve done some further testing on this today and discovered that the configuration works correctly when the proxy_pass url is accessed via http, I can see dns queries for the proxy_server url every minute as per the ttl. The moment I change the url to https, this stops. Is this a known limitation?

Regards

Rob


> On 26 Sep 2018, at 16:53, Rob Fulton <rob at cow-frenzy.co.uk> wrote:
> 
> Hi,
> 
> I'm using nginx to proxy to a host with a rapidly changing dns entry but I can't seem to get the proxy command the re-query dns using the vairable method suggested, the following is a excerpt from my config :
> 
> server {
> 
>     listen 443 ssl;
> 
>     resolver 127.0.0.1 valid=20s;
>     set $proxy_server somehostname.com;
> 
>     location / {
> 
>         proxy_pass https://$proxy_server/blue/content$request_uri;
> 
> 
> I'm using nginx 1.14, watching my dns logs I see no requests following nginx starting up. The upstream_addr value in my nginx logs also doesn't change.
> 
> Any suggestions of why this isn't working as expected?
> 
> Regards
> 
> Rob
> 
> 
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