ezjails, jails

[Chad Leigh -- Shire.Net LLC]

Hi

On Sep 26, 2006, at 8:40 AM, Don Munyak wrote:

> re: ezjails, jails
>
> Hopefully a quick question. I am researching using EZJails from
> http://erdgeist.org/arts/software/ezjail/
>
> But a little confused by the jail concept.
>
> I think I need to setup two jails, one(1) for email services and
> one(1) for www services, on a single server.

That will work

>
> q. If I am running a webserver for more than one(1) domain, should I
> be using a single jail for each domain, or is one jail needed for
> 'ALL' www processing ?

Up to you.  Each jail requires its own IP address.  There are things  
that people do with jails with private IPs and packet forwarding and  
stuff, but to keep it simple, consider that each jail needs an IP  
address (public).  If you have lots of them, and if each domain is  
something someone else runs, or is based on totally different SW,  
then you might consider separating them.  If you own and run each  
domain and they use a similar SW menu, then you may just run them out  
of one jail using apache virtual hosts.

>
> q. If I am using a jail for each domain, does this imply loading
> apache+php+mysql, for each www jail ?

Yes.  There are ways to share but until you are comfortable with  
jails and what you are doing, it is easier to just load each one up  
separately.

We run a ton of jails, one for each customer, and we share SW across  
them in our own "/usr/public" read only area with each jail having  
its own /usr/local/etc but to get it to work requires some  
configuration work and understanding how it all works and some other  
trickery...

>
> q. Likewise with email and multiple domains, does multiple domains =
> multiple email jails, as well as multiple copies of smtp, pop3,
> webmail ??

You could but in most cases there is no reason to do that.  Run them  
all in 1 jail using one set of SW.  Set up your SMTP server to  
support multiple domains (I recommend exim).

>
> q. Email and WWW services both require MySQL. Would I be installing
> MySQL 'x' number of times?

Depends on how the SW accesses mysql but you can run multiple mysql  
DBs out of one installation...

Chad

>
> What I want to do is he following:
>
> We are a small company, so email traffic is minial..ie. less than 500
> messages per day.
> Likewise, www traffic is also minimal.
> I want to build a single server to be located at a co-location  
> facility.
> This server would support both email and www services.
>
> The email services would be built using instructions from
> http://www.tnpi.biz/internet/mail/toaster.shtml
> ...that being stuff like qmail, RBL, spamassassin, clamav...etc
> We have 5 separate domains for email services
> The www services would be functionally similiar to LAMP
> We have 5 separate domains for www
>
> I would greatly appreciate any links or advice towards achiving my  
> goals.
>
> Thanks
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---
Chad Leigh -- Shire.Net LLC
Your Web App and Email hosting provider
chad at shire.net