Send old content if backend is down
Wido den Hollander
wido at widodh.nl
Tue Nov 30 08:44:29 CET 2010
Hi,
Just to be sure, are you doing health checks on your backend?
Wido
On Tue, 2010-11-30 at 08:16 +0100, Klapproth, Martin wrote:
> Thank you. This option helped a lot. But varnish delivers still 503
> errors when the backend is completely down (no route to host,
> connection refused). Is there a way to handle such situations too?
>
>
>
>
> ______________________________________________________________________
> From:Per Buer [mailto:perbu at varnish-software.com]
> Sent: Montag, 29. November 2010 15:10
> To: Klapproth, Martin
> Cc: varnish-misc at varnish-cache.org
> Subject: Re: Send old content if backend is down
>
>
>
>
> On Mon, Nov 29, 2010 at 3:01 PM, Klapproth, Martin
> <Klapproth.M at sportresult.com> wrote:
>
> Hello,
>
>
>
> I have a general question relating to varnish’s vcl
> configuration. I want the varnish server to send old cached
> objects if the backend is down (marked unhealthy). I have
> tested various grace configurations but nothing worked,
> because grace takes only effect if the backend is slow, but
> not if it’s down. So is there a way (maybe in vcl_error)?
>
>
>
>
>
> Yes. There is a way.
>
>
>
>
>
> http://www.varnish-cache.org/docs/trunk/tutorial/handling_misbehaving_servers.html#saint-mode
>
>
>
> --
> Per Buer, Varnish Software
> Phone: +47 21 98 92 61 / Mobile: +47 958 39 117 / skype: per.buer
>
>
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