Backend definition in multiple VCL files in Varnish 5

[Reza Naghibi]

Can you provide a varnishlog of the request where you get the backend
errors?

--
Reza Naghibi
Varnish Software

On Sat, May 6, 2017 at 3:45 PM, Nigel Peck <np.lists at sharphosting.uk> wrote:

>
> You might try Stack Overflow if you're not having any luck on this list.
> There are a few folks who answer Varnish questions on there. Just tag it
> "varnish" and "varnish-vcl".
>
> Nigel
>
> On 06/05/2017 14:40, Kurt Sultana wrote:
>
>> Ideas anyone? Any help is appreciated.
>>
>> Thanks
>>
>> On 4 May 2017 2:33 p.m., "Kurt Sultana" <kurtanatlus at gmail.com <mailto:
>> kurtanatlus at gmail.com>> wrote:
>>
>>     Hi all,
>>
>>     I'm a bit newish to Varnish though I do have some background. I have
>>     a Varnish 5 instance connected to 2 backend servers (Magento 2
>>     applications).
>>
>>     I'm using the new Varnish 5 feature of loading multiple VCL files.
>>     My ultimate problem is during purging however I'd like to ensure
>>     things are set up correctly because documentation regarding multiple
>>     VCL files in Varnish 5 is somewhat lacking.
>>
>>     To keep things very simple for now, I'm going to use 1 backend
>>     server in my example.
>>
>>     So, I have a magento.vcl defined as follows:
>>
>>     *vcl 4.0;*
>>
>>     *import std;*
>>     *
>>     *
>>     *# The minimal Varnish version is 4.0*
>>     *# For SSL offloading, pass the following header in your proxy
>>     server or load balancer: 'X-Forwarded-Proto: https'*
>>     *
>>     *
>>     *backend default {*
>>     *    .host = "127.0.0.1";*
>>     *    .port = "8088";*
>>     *}*
>>     *
>>     *
>>     *include "/etc/varnish/common.vcl";*
>>
>>     And a top.vcl
>>
>>     *vcl 4.0;*
>>     *
>>     *
>>     *import std;*
>>     *
>>     *
>>     *backend default { .host = "127.0.0.1"; }*
>>     *
>>     *
>>     *sub vcl_recv {*
>>     *    if (req.http.host == "magento2.dev") {*
>>     *        return (vcl(magento_vcl));*
>>     *    }*
>>     *}*
>>
>>     Then I run
>>
>>     *service varnish restart*
>>
>>     *varnishadm*
>>
>>     *vcl.load magento /etc/varnish/conf.d/magento.vc <http://magento.vc
>> >l*
>>
>>     *vcl.label magento_vcl magento*
>>
>>     *vcl.load top /etc/varnish/top.vcl*
>>
>>     *vcl.use top*
>>
>>     *quit*
>>
>>
>>     When I browse to magento2.dev, I get a backend fetch error after
>>     some seconds. It's only when I go in magento.vcl and change the name
>>     of the backend and make a backend hint that it works. See below:
>>
>>     *vcl 4.0;*
>>
>>     *import std;*
>>     *
>>     *
>>     *# The minimal Varnish version is 4.0*
>>     *# For SSL offloading, pass the following header in your proxy
>>     server or load balancer: 'X-Forwarded-Proto: https'*
>>     *
>>     *
>>     *backend magento {*
>>     *    .host = "127.0.0.1";*
>>     *    .port = "8088";*
>>     *}*
>>     *
>>     *
>>     *
>>     sub vcl_recv {
>>          set req.backend_hint = magento;
>>     }
>>     *
>>     *
>>     *
>>     *include "/etc/varnish/common.vcl";*
>>     *
>>     *
>>     Why should I be specifying a backend hint? Shouldn't Varnish be
>>     loading a different VCL according to the host specified in top.vcl?
>>     Or is there something wrong?
>>
>>     Thanks in advance,
>>     Kurt
>>
>>
>>
>>
>> _______________________________________________
>> varnish-misc mailing list
>> varnish-misc at varnish-cache.org
>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>>
>>
> _______________________________________________
> varnish-misc mailing list
> varnish-misc at varnish-cache.org
> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://www.varnish-cache.org/lists/pipermail/varnish-misc/attachments/20170508/5935f717/attachment-0001.html>