Fail-over caching reverse proxy

Posted by sybreon on Server Fault See other posts from Server Fault or by sybreon
Published on 2009-09-21T03:04:40Z Indexed on 2010/05/03 10:48 UTC
Read the original article Hit count: 257

Filed under:

reverse-proxy

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caching

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varnish

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webserver

Is there a way to configure varnish or any other caching reverse proxy, to serve pages from its cache when the back-end fails? At the moment, if the back-end goes down a 503 Service Unavailable error would be returned to the browser. I would prefer it if visitors got to see a cached version than an error page while the back-end is being fixed.

My setup:

[varnish (public ip)] <===> [router] <===> [web server (private ip)]

PS: I have only one back-end web server.

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