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Posted to users@httpd.apache.org by "Campbell, David" <Da...@granadamedia.com> on 2003/01/08 12:16:56 UTC
[users@httpd] Vhost cleverness
Hello clever people - I have a little apache question I was hoping someone
could answer:
We have ten loadbalanced Apache webservers all serving the same sets of
sites using name based virtual hosting. In order to view the non
loadbalanced site on a single server we use ServerAliases to give unique
urls to each server:
<VirtualHost *>
ServerName www.mydomain.dom
ServerAlias server-1.mydomain.dom
ServerAdmin me@mydomain.dom
DocumentRoot /content/rsync/mydomain.dom
ErrorLog /var/logs/errors/mydomain.dom
</VirtualHost>
This means that we have 10 different virtuals.conf for the virtual hosts - a
real pain to update.
What I want to do is pass variables as part of the ServerAlias
So I changed ServerName to server-1 in httpd.conf
and updated the vhosts to look like this
<VirtualHost *>
ServerName www.mydomain.dom
ServerAlias %{SERVER_NAME}.mydomain.dom
ServerAdmin me@mydomain.dom
DocumentRoot /content/rsync/mydomain.dom
ErrorLog /var/logs/errors/mydomain.dom
</VirtualHost>
however this doesn't work - server-1.mydomain.dom resolves to the default
vhost on server-1 not server-1.mydomain.dom
What am I doing wrong? Did I go about this the right way?
Thanks in advance
Dave
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Re: [users@httpd] Vhost cleverness
Posted by Kirk Jackson <ki...@mcs.vuw.ac.nz>.
I find mod_macro pretty useful to do something like this:
http://www.coelho.net/mod_macro/
Kirk
On Thu, 09 Jan 2003 01:24:20 -0500 Kirk Bailey <id...@netzero.net>
wrote:
> Zac Stevens wrote:
> > Hi David,
> >
> > On Wed, Jan 08, 2003 at 11:16:56AM -0000, Campbell, David wrote:
> > <--snip-->
> >
> >>This means that we have 10 different virtuals.conf for the virtual
> >hosts - a>real pain to update.
> >>
> >>What I want to do is pass variables as part of the ServerAlias
> >
> If you only want ONE virtuals.conf file for all 10 domains, create a
> soft link in each, each with the correct ownership for that domain,
> all pointing at one default file someplace else. Change that one, and
> all of them are changed. Does this help any?
>
> [snip remaining bits]
>
>
> end
>
> Respectfully,
> Kirk D Bailey
>
> "Thou Art Free." - Eris
>
>
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Re: [users@httpd] Vhost cleverness
Posted by Kirk Bailey <id...@netzero.net>.
Zac Stevens wrote:
> Hi David,
>
> On Wed, Jan 08, 2003 at 11:16:56AM -0000, Campbell, David wrote:
> <--snip-->
>
>>This means that we have 10 different virtuals.conf for the virtual hosts - a
>>real pain to update.
>>
>>What I want to do is pass variables as part of the ServerAlias
>
If you only want ONE virtuals.conf file for all 10 domains, create a
soft link in each, each with the correct ownership for that domain, all
pointing at one default file someplace else. Change that one, and all of
them are changed. Does this help any?
[snip remaining bits]
end
Respectfully,
Kirk D Bailey
"Thou Art Free." - Eris
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Re: [users@httpd] Vhost cleverness
Posted by Zac Stevens <zt...@cryptocracy.com>.
Hi David,
On Wed, Jan 08, 2003 at 11:16:56AM -0000, Campbell, David wrote:
<--snip-->
> This means that we have 10 different virtuals.conf for the virtual hosts - a
> real pain to update.
>
> What I want to do is pass variables as part of the ServerAlias
As Rich mentioned, that's not a valid syntax for ServerAlias. Generally
speaking, there aren't any variables available for interpolation within
config directives unless specifically stated in the documentation.
While the usage you're trying never occurred to me before, it is quite
novel and it's a shame it doesn't work so simply. But that's not what you
wanted to hear.
I'd think your best bet would be to look at using the ServerPath directive.
It will lead to uglier URLs when access the VH on a specific server, but
if you're using this largely for administrative purposes it could be good
enough.
http://httpd.apache.org/docs/vhosts/examples.html#serverpath
Failing that, the standard answer is to use a preprocessor on the
configuration file and use that to generate the per-server configuration.
If you currently have an automated method of distributing the configuration
to each server, the additional step won't cause you any problems.
Cheers,
Zac
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Re: [users@httpd] Vhost cleverness
Posted by Rich Bowen <rb...@rcbowen.com>.
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Hash: SHA1
On Wed, 8 Jan 2003, Campbell, David wrote:
> What I want to do is pass variables as part of the ServerAlias
>
> So I changed ServerName to server-1 in httpd.conf
>
> and updated the vhosts to look like this
>
> <VirtualHost *>
> ServerName www.mydomain.dom
> ServerAlias %{SERVER_NAME}.mydomain.dom
> ServerAdmin me@mydomain.dom
> DocumentRoot /content/rsync/mydomain.dom
> ErrorLog /var/logs/errors/mydomain.dom
> </VirtualHost>
>
> however this doesn't work - server-1.mydomain.dom resolves to the default
> vhost on server-1 not server-1.mydomain.dom
>
> What am I doing wrong? Did I go about this the right way?
Well, what you're doing wrong is that this is not valid syntax for
ServerAlias. It doesn't understand variables. It thinks you want the
literal hostname "%{SERVER_NAME}.mydomain.dom", which is, of course, not
a valid hostname, but it's what you told it you wanted.
There are, perhaps, other ways to make this happen, but you can't make
up syntax for a directive and hope it works.
Modules like mod_backhand do load balancing. And I've seen a variety of
other suggested ways to handle this sort of load balancing. Perhaps
Google for apache load balancing, but I think it's also been addressed
here on the list, so there might be something in the archives.
- --
Nothing is perfekt. Certainly not me.
Success to failure. Just a matter of degrees.
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