Re: Modifying @INC on a Per-VirtualHost

On 19.08.2017 23:29, Ben RUBSON wrote:
>> On 19 Aug 2017, at 22:40, Ben RUBSON <[email protected]> wrote:
>>
>> Hi list,
>>
>> I have a question regarding tuning @INC at VirtualHost level, with prefork MPM.
>> (...)
>> will I have 2 (2 different PerlSwitches configurations)
>> or 11 (11 different VH using PerlSwitches) interpreters launched ?
>
> Well, reading at Parent (which is needed), gave me the answer :
> https://perl.apache.org/docs/2.0/user/config/config.html#C_Parent_
>
> I will have 11 interpreters.
>
> So a better configuration would be :
>
> PerlSwitches -T -I/home/production/lib/perl
> <VirtualHost prod1>
>      ...
> </VirtualHost>
> <VirtualHost prod2>
>      ...
> </VirtualHost>
> <VirtualHost prodn>
>      ...
> </VirtualHost>
>
> <VirtualHost dev>
>      PerlOptions +Parent
>      PerlSwitches -I/home/development/lib/perl
> </VirtualHost>
>
> However, here is what I have reaching VH dev :
> [warn] -T switch is ignored, enable with 'PerlSwitches -T' in httpd.conf
> And according to ${^TAINT}, taint is no more enabled in VH dev.
> Any workaround ?
>

Maybe another possible solution for what I think you are trying to achieve.
...
<VirtualHost dev>
   ProxyPass "/" "http://dev.sameserver.local:8000/"
   ProxyPassReverse "/" "http://dev.sameserver.local:8000/"
</VirtualHost>

Add this to the local /etc/hosts file:
127.0.0.1 dev.sameserver.local

and run *another Apache instance*, with another perl/mod_perl, on port 8000,
with a
<VirtualHost *:8000>
   ServerName dev.sameserver.local
...
</VirtualHost>
and watever @INC you want.

For the clients, it will look just the same (they continue to access 
"http://dev.company.com:80/*"). There will be a (very small) overhead for the proxying, 
but which affects only your dev people.
You can (carefully) share a DocumentRoot and whatever with the main instance, or not.
And it will certainly use less memory than 11 perl interpreters per Apache child.