Serving static html when all backends are sick

[Guillaume Quintard]

A director is considered healthy is any of its backend is healthy, so if
you put a director in req.backend_hint, you're good.

-- 
Guillaume Quintard

On Wed, Dec 7, 2016 at 9:29 AM, Thijs Cramer <t.cramer at beslist.nl> wrote:

> Given the following code:
>
> =========================================
> sub vcl_synth {
>   if (resp.status == 999) {
>     set resp.status = 200;
>     set resp.http.Content-Type = "text/html; charset=utf-8";
>     synthetic( {"Static HTML"} );
>     return(deliver);
>   }
> }
>
> # Check if backend is healthy, otherwise, redirect
> if (!std.healthy(req.backend_hint)) {
>   return (synth(999, "All backends down."));
> }
>
> =========================================
>
> Will the static page be served if ALL backends are down, or just when
> the specific backend it got back from the backend_hint is down?
>
> We want to be able to serve static html as a fallback if all backends
> are down.
>
> Is this the proper way to do this?
>
> Thanks in advance!
>
> - Thijs
>
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