Frontend caching to multiple sites

[rafailowski]

Hi,
For change vcl on the fly, just do:
# varnishadm -T 127.0.0.1:33222 vcl.load vcl_name 
/path/to/your/vcl/varnish.vcl
also look at :
vcl.load <configname> <filename>
vcl.inline <configname> <quoted_VCLstring>
vcl.use <configname>
vcl.discard <configname>
vcl.list
vcl.show <configname>

or if you want : telnet 127.0.0.1 33222
For the downtime, i don't know exactly but it's very quick.


Alecs Henry wrote:
> Hi Espen,
> 
> Thanks for the answer!
> 
> Is there a way to accomplish this using different VCLs?
> I ask it because I'm trying to figure out a way to make it automatic. As 
> in if I have a new customer, I'd just fill out a form (with the customer 
> details like domain name, backend server, other configuration) and a 
> little system working under the hood would generate the VCL file, send 
> it to the varnish server and load it.
> 
> If I use one VCL file for everybody, how do I reload this VCL when I 
> need to change it? Is it necessary to reload varnish? Would it present 
> downtime?
> 
> Thanks!!
> 
> Alecs
> 
> 
> 
> On Wed, Nov 5, 2008 at 5:58 AM, Espen Braastad <espen at linpro.no 
> <mailto:espen at linpro.no>> wrote:
> 
>     Alecs Henry wrote:
> 
>         I want to set up varnish as a reverse proxy/cache to multiple
>         customer
>         sites.
>         As in, I have 10 different customers, each with its own web site
>         (domains)
>         with their own necessities, compression, cookie, authentication,
>         etc; each
>         customer is a different setup from the other, so I thought "OK!
>         Let's use a
>         different VCL for each customer and all will be fine".
> 
>         Bear with me here, I've just started playing with varnish, but
>         it seems that
>         I can't create a different VCL file for each customer and load
>         it in varnish
>         (vcl.use ...) as varnish will stop responding for the previous
>         site and
>         start responding only to the new one (active configuration).
>         Meaning, the
>         content that is served is only the content from the new site,
>         even if using
>         the correct domain.
> 
>         How can I go about setting this up?
>         I'm using Varnish 2.0.1, just downloaded and compiled it today.
>          
> 
>     Hi,
> 
>     You can try something like this in one VCL:
> 
>     sub vcl_recv {
>      if (req.http.host ~ "^(www\.)site1\.com$"){
>       # foo
>      }
> 
>      if (req.http.host ~ "^(www\.)site2\.com$"){
>       # bar
>      }
> 
>      if (req.http.host ~ "^(www\.)site3\.com$"){
>       # baz
>      }
> 
>      # Unknown host
>      error 403;
>     }
> 
>     -- 
>     mvh
>     Espen Braastad,
>     +47 21 54 41 37
>     espen at linpro.no <mailto:espen at linpro.no>
>     Linpro AS - Ledende på Linux
> 
> 
> 
> 
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