I'm thinking what I want to do is not possible, but I figured I'd give
it a shot.
I want to setup a generic Varnish instance that will be used to handle
multiple web sites. All of the web sites are directed to the same
backend and the correct site is served up by Apache using Virtual Hosts
that match the corresponding Host: header. The idea is that a new site
can have caching "turned on" simply by changing its IP address from the
live server to the Varnish server. However, by doing so, all requests
come into the same instance. This means that I cannot create separate
log files for each site using varnishncsa.
I've played around with some ideas in regards to matching server headers
in the log, but I'm thinking this is not even possible because I would
have to run a varnishncsa instance for each site but have them all
talking to the same Varnish instance. ISTM that by doing so, varnish
would "serve" the log to only one of the daemons and not all of them,
making the logging ineffective. I could potentially still have my log
analyzer work by read entirely from one file, but that would require
tweaking the output format of varnishncsa which is not possible (without
hacking the code).
Can anyone think of a way to do something like this? Thanks.
--
Justin Pasher
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