PROXY and Unix domain sockets

[Geoff Simmons]

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On 07/12/2017 01:09 PM, Geoff Simmons wrote:
> 
> Again I'm writing in the hope of soliciting opinions, this time 
> pondering support for UDS in the PROXY protocol.

I should have mentioned that the last mail was entirely about
receiving PROXY headers.

We can of course send UDS info in PROXY headers to a backend is
configured for it, in fact it's the only right thing to do when
Varnish is listening at UDS.

For PROXYv2 that's straightforward. For PROXYv1 however, it will mean
that UNKNOWN will have to be sent when Varnish is listening at UDS.

If a backend requires PROXYv1 but always rejects UNKNOWN, and that
can't be changed, this might be a bit of a problem.


Best,
Geoff
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