CODEWITHSUNDEEP
regexcachingvarnishwildcard-subdomainvarnish-vcl
user2152590
user2152590

Reputation: 1

How to disable varnish cache for wildcard subdomains

I'm trying to disable caching in varnish for all subdomains. Our application allows users to create and manage their own website on a subdomain of our url, but varnish keeps caching their page when they're trying to edit it.

I know the basic format:

if (req.url ~ "[code here]") {
    # Don't cache, pass to backend
    return (pass);
}

but nothing I've tried seems to work for all subdomains.

Maybe it's a simple regex?

Upvotes: 0

Views: 2673

Answers (2)

Mike Andreasen
Mike Andreasen

Reputation: 379

I think you would need this for any subdomain (note this may be an issue if you use www as it may be considered a subdomain) and will match anything before the . in example.com

sub vcl_recv {
      if(req.http.host ~ ".*\.example.com") {      
        return( pass );
    }

 }

Upvotes: 0

Debreczeni András
Debreczeni András

Reputation: 1678

You can use req.http.host for this purpose. And yes, it can be a regex. 

sub vcl_recv
{
   /* your earlier definitions */
   if( req.http.host ~ 'my.subdomain.example.com' )
   {
        // set the backend first
        set req.backend = localhost;

        return( pass );

    }

    /* your definitions  */
 }

In some cases you may need to return( pipe ):
https://www.varnish-cache.org/docs/2.1/faq/configuration.html

Upvotes: 2

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