VCL 4.1 and beresp.backend.ip

Hugues Alary hugues at betabrand.com
Fri Mar 30 19:12:42 UTC 2018


Great, thank you Geoff!

On Fri, Mar 30, 2018 at 8:42 AM, Geoff Simmons <geoff at uplex.de> wrote:

> On 03/29/2018 08:24 PM, Hugues Alary wrote:
> >
> > VCL 4.1 retired beresp.backend.ip.
> >
> > Is there any way in VCL 4.1 to get the IP Address of the backend used?
>
> No. There have been some thoughts about adding something for "get
> backend info" in a future version, which would expose the IP address
> among other things, but that's not available for now.
>
> > If not, it means I'll need to use VCL 4.0.
> >
> > Is there any reason for me to prefer 4.1 over 4.0?
>
> There may or may not be, depending on your needs.
>
> You'll need VCL 4.1 if:
>
> - You're using Unix domain sockets
> - You have more than one listen address, and you want to use
>   local.socket and/or local.endpoint in VCL to tell them apart.
> - You want to use sess.xid.
> - You want to selectively disable ESIs in client responses, and
>   prefer to use resp.do_esi rather than req.esi for that.
>
> The *.proto variables are read-only in 4.1; if you want to write to
> them, you have to stay with 4.0.
>
> beresp.storage_hint is still around in 4.0, not in 4.1, but you should
> be using beresp.storage anyway.
>
> AFAIK that's all of it.
>
>
> HTH,
> Geoff
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