Hi Varnish people
I use something like this snippet:
sub vcl_recv {
if (req.url ~ "^\/foo\/") {
set req.url = regsub(req.url, "^\/foo\/", "/");
set req.backend_hint = special_backend;
}
}
for rewriting req.url before sending the request to the backend. As you can see
I simply remove the first portion of the path before sending the request to the
backend. For urls not matching the regex I do not change req.url. I have also
enabled restarts. I am using the original url in vcl_hash.
But I have noticed that when the "special_backend" is down my default backend
gets the request. I suppose the reason is that I have modified req.url. And
when the request is restarted it uses this modified url which does not start
with "/foo/".
My question is: What would you recommend that I do to avoid this? Should I
modify the url in another subroutine?
Best regards,
Jesper
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