Changing the fetch for virtual hosts.

[Adam Denenberg]

 Run varnishlog against the request and confirm a TCP_HIT when making the
second request to the different hostname.  Also confirm you do not see the
request hit your backend webserver logfile



On Mon, Feb 7, 2011 at 8:49 AM, Chris Johnson
<johnson at nmr.mgh.harvard.edu>wrote:

>     Huh.  Well, I think I've done everything everyone said was right.
> Here's a snippet of what I have in varnish's default.vcl;
>
> backend freesurfer {
>      .host = "127.0.0.1";
>      .port = "8080";
> }
>
> which happens to be the same place the default backend points to
> because this is a different virtual host on the same server.
>
> And in vcl_recv I have;
>
>    if (req.http.host ~ "^sufer.nmr.mgh.harvard.edu") {
>      set req.http.host = "www.freesurfer.net";
>      set req.backend = freesurfer;
>    }
>
> which referenes my backend declaration and rewrites the header host
> name.
>
>     How do I tell if this is working?  Remember, I'm trying to make
> the old virtual host references to sufer.nmr.mgh.harvard.edu be keyed
> on and fetch from the new virtual host www.freesurfer.net so varnish
> doesn't cache everything twice.
>
>     Varnich didn't complain when I restarted it and seems to be
> caching.  I'm just not sure what at this point.
>
>
>  On Fri, Feb 4, 2011 at 5:17 PM, Chris Johnson
>> <johnson at nmr.mgh.harvard.edu> wrote:
>>
>>> On Fri, 4 Feb 2011, Per Buer wrote:
>>>
>>>>
>>>>      if (req.http.host ~ "^www.example.com") {
>>>>        set req.backend = foo;
>>>>      }
>>>>
>>>
>>>     Which goes in vcl_recv and in his case foo is a backend declaration
>>> function that sets up .host and .port for the virtual host I want, yes?
>>>
>>
>> Almost. foo is here a declared backend - declared with the keyword
>> "backend" -
>> http://www.varnish-cache.org/docs/trunk/tutorial/backend_servers.html
>>
>>
>>
>>
>>
>> --
>> Per Buer, Varnish Software
>> Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / Skype: per.buer
>> Varnish makes websites fly!
>> Want to learn more about Varnish?
>> http://www.varnish-software.com/whitepapers
>>
>>
>>
>>
>
> -------------------------------------------------------------------------------
> Chris Johnson               |Internet: johnson at nmr.mgh.harvard.edu
> Systems Administrator       |Web:
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