Reg: backend 'name' in VCL before going to origin

[Guillaume Quintard]

Hi,

Getting the resolved backend in v_b_f won't be possible until
https://github.com/varnishcache/varnish-cache/pull/2680 gets merge. In the
meantime (unless you write the vmod for it), there's no way to pre-resolve
the director.

-- 
Guillaume Quintard


On Wed, May 29, 2019 at 6:26 PM Hardik <hetardik.p at gmail.com> wrote:

> Thanks Guillaume.
>
> I am already using bereq.backend in v_b_f which is giving director name.
> As you have pointed out,  I want 'exact' backend name inside director.
> Also before sending to origin because want to set few  headers for origin
> as per exact backend.
>
> On Thu, 30 May 2019, 04:20 Guillaume Quintard, <
> guillaume at varnish-software.com> wrote:
>
>> Hi,
>>
>> man vcl is your friend. I believe what you want is "bereq.backend"
>>
>> Also, you could just write: std.log("using backend: " + bereq.backend)
>>
>> note that bereq.backend will return the unresolved backend, meaning that
>> if backends are inside a director, you'll get the name of the director,
>> since the backend choice happens between v_b_f and v_b_r. To know what
>> exact backend was used, you have to check in v_b_r.
>>
>> cheers,
>> --
>> Guillaume Quintard
>>
>>
>> On Wed, May 29, 2019 at 4:56 AM Hardik <hetardik.p at gmail.com> wrote:
>>
>>> Hi Team,
>>>
>>> Requirement : *to set few headers based on backend origin ( having
>>> multiple origins/backends in single director)*.
>>>
>>> I want to do similar to this.
>>> https://stackoverflow.com/questions/43357690/varnish-vcl-how-can-i-switch-on-req-backend-hint
>>>
>>> sub vcl_backend_fetch {
>>>     if (bereq.backend.name == "one") {
>>>        std.log("one");
>>>     } else if (bereq.backend.name == "two") {
>>>        std.log("two");
>>>     } else {
>>>        std.log("neither one");
>>>     }
>>> }
>>>
>>>
>>> I am trying to do same (inside b_fetch) but getting error that symbol
>>> not found. I am using varnish 6.1.
>>> Is this different function call/name for varnish 6.1 ?
>>>
>>> Thank you
>>> Hardik
>>>
>>>
>>> _______________________________________________
>>> varnish-misc mailing list
>>> varnish-misc at varnish-cache.org
>>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>>>
>>
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