High availability vhosting WAS Re: [users@httpd] Dynamic vhost config?

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> On Jan 8, 2022, at 10:01, Eric Covener <covener@xxxxxxxxx> wrote:
> 
> On Sat, Jan 8, 2022 at 9:49 AM Felipe Gasper <felipe@xxxxxxxxxxxxxxxx> wrote:
>> 
>> Hi all,
>> 
>> Are there any existing httpd modules that allow for fully dynamic vhost configurations via LDAP or some other query mechanism?
>> 
>> Kind of like mod_vhost_alias, but instead of looking on disk it would query a socket?
>> 
>> If not, is such a thing possible to write via httpd’s existing plugin mechanism?
> 
> I don't think it's feasible for them to act like real virtualhosts
> e.g. activating arbitrary directives as if they were enclosed in a
> unique VirtualHost. Same limitation as mod_vhost_alias has.
> 
> There's no reason why a copy of mod_vhost_alias couldn't look up
> something the way you describe at runtime to make its decision.
> Fortunately It is a very small/simple module.


If I’m understanding you correctly, while it’s easy to make such a setup with just the very basic controls that mod_vhost_alias exposes, it’s much harder to have it be able to use, e.g., mod_ruid2, mod_userdir, etc.? That’s probably unfeasible for my use case.

A bit more context: currently we run httpd in a “classic” single-node setup, hosting 1,000s of virtual hosts that users individually control. Any time a user adds/removes/alters a domain, httpd.conf is updated. We’d like to explore high-availability options, but containerized/k8s setups that I’ve seen seem to package the configuration in the container, which means updates to that config would entail rebuilding the container; that would seem to entail a dramatic increase in “churn” every time a user adds or removes a domain.

What, if anything, have others done to address this problem?

Thank you!

Cheers,
-Felipe Gasper
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