Varnish 4 Not Obeying no-store

[Per Buer]

On Thu, Jan 7, 2016 at 2:01 PM, Debraj Manna <subharaj.manna at gmail.com>
wrote:

> Hi,
>
> I have a response in which no-store is set. But varnish is still caching
> the response for default 2 mins.
> (..)
> By vcl_backend_response looks something like below:-
>
> sub vcl_backend_response {
>     if (bereq.url ~ "^/rde_server/") {
>        set beresp.ttl = 300s;
>        return(deliver);
>     }
>     if(beresp.http.Cache-Control ~ "no-store|no-cache") {
>        return(deliver);
>     }
>     unset beresp.http.Cache-Control;
> }
>
> Can some one let me know what is going wrong or I have to do some special
> handling in vcl so that varnish does not cache the response with no-store
> set in Cache-Control?
>

You are using the wrong action. return(deliver) doesn't mark the object as
uncacheable. It only marks it as OK for delivery to the client.

Do something like this:

if(beresp.http.Cache-Control ~ "no-store|no-cache") {
   set beresp.ttl = 120s;
   set beresp.uncacheable = true;
   (..)


This will create a hit-for-pass object to stop serialised access to the URL
and

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