nick.tailor at gmail
Aug 1, 2012, 9:35 AM
Post #2 of 3
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Your missing set beresp.ttl
Cheers
Nick Tailor
Sent from my iPhone
On Aug 1, 2012, at 9:25 AM, nicola sabbi <nsabbi [at] officinedigitali> wrote:
> Hi,
> I'm trying to configure varnish 3.0.1 as a failover cache in front of a web server running EZ publish.
> What I'd like to do is to let varnish cache pages for up to 4 hours. If the backend server is seen sick it should serve the last cached page for the current request (if available), otherwise serve an error page.
>
> The backend polling code is working fine, but every time I tamper with the test page returning a 404 error code (in order to force the sick mode) varnish returns a 503 error to the client instead of the cached content, even though the cache is populated (or so I assume).
>
> The configuration code I'm using is the following:
>
>
> backend default {
> .host = "192.168.0.66";
> .port = "80";
> .probe = {
> .url = "http://backend/test.php";
> .timeout = 10s;
> .interval = 5s;
> .window = 3;
> .threshold = 3;
> .expected_response=200;
> }
> }
>
> sub vcl_recv {
> if (req.backend.healthy) {
> set req.grace = 30m;
> } else {
> set req.grace = 4h;
> }
> #return(lookup);
> }
>
> sub vcl_fetch {
> set beresp.grace = 8h;
> # return(restart);
> }
>
>
>
> sub vcl_error {
> set obj.http.Content-Type = "text/html; charset=utf-8";
> set obj.http.Retry-After = "5";
> synthetic {"
> Unavailable page!
> "};
> return (deliver);
> }
>
> Please, can you explain me what's missing or wrong with this configuration?
> Thanks,
> Nico
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