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From Jeffrey Janner <Jeffrey.Jan...@PolyDyne.com>
Subject RE: Tomcat 6 - How to make an application available at www.mydomain.com
Date Mon, 30 Jan 2012 15:35:05 GMT
> -----Original Message-----
> From: André Warnier [mailto:aw@ice-sa.com]
> Sent: Sunday, January 29, 2012 7:07 AM
> To: Tomcat Users List
> Subject: Re: Tomcat 6 - How to make an application available at
> www.mydomain.com
> 
> John Renne wrote:
> > On Jan 29, 2012, at 1:27 PM, André Warnier wrote:
> >> Sorry to appear to pounce on you, but putting a <Context> element in
> server.xml is discouraged, see here :
> >> http://tomcat.apache.org/tomcat-6.0-
> doc/config/context.html#Introduction
> >>
> > No offense taken
> >
> >> I am not myself an expert, so treat this with caution, but to
> summarise so far :
> >
> > Same here, we're all doing the same, trying to be helpful in some way
> >> 1) the easiest and recommended way is to deploy the application as
> ${CATALINA_BASE}/webapps/ROOT.war. That is the normal place for an
> application invoked as "/", it will not confuse anyone, and it will
> work with or without a front-end.
> >
> > This isn't what the original poster asked, he asked for a way without
> renaming
> 
> Yes, but maybe this was for some reason of his, which is not
> necessarily a good one (we
> don't know, he did not give a reason).  As Chuck was pointing out, this
> is the recommended
> best practice, and it turns out to be the easiest in all respects.  So
> it is worth
> pointing it out anyway.
> 
> >
> >> 2) instead, in some cases (and only since Tomcat 7.x), you can use
> the "trick" indicated previously by Pid
> >
> > This isn't what the original poster asked, he was talking about
> Tomcat 6
> 
> And as Pid indicated, upgrading was a suggestion. Tomcat 7 is the
> current version, and it
> is "better" than Tomcat 6.  So again, it is worth suggesting.
> But of course, as the OP is under Ubuntu, he may want to use the Ubuntu
> packages (for ease
> of administration), and Tomcat 7 may not yet have made it it there.
> 
> >> 3) place a Context description in
> $CATALINA_BASE/conf/[enginename]/[hostname]/ROOT.xml, with an attribute
> : docBase="(full path to the application's .war archive)"  (whatever
> you decide to name the .war archive). Put the .war archive outside of
> tomcat's webapps directory then, to avoid a double deployment.
> >
> > This is a nice option, however putting war's outside of the webapps
> directory might be very confusing.
> 
> It would not be more confusing than where Ubuntu's Tomcat package is
> already putting the
> Tomcat files. ;-)
> And it may be a nice way to "insulate" his application from future
> Ubuntu Tomcat upgrades
> (which, by the way, also militates against putting a <Context> in
> server.xml).
> 
> >
> >> 4) deploy the application as you wish, and use VirtualHost and/or
> Rewrite and/or Proxy rules at the front-end httpd level to achieve what
> you want.  But this is more complex to do right as it appears
> initially. (You may have to be careful about links embedded inside your
> pages, for example).
> >>
> > This is a nice solution too, however if an application for some
> reason uses applets or generates it's URL's in a non-standard way, this
> might not work. I do realize the downsides of modifying the server.xml
> and including a context element, but it might be a working approach and
> answers the question the original poster has.
> >
> To emphasise a point made above : it often happens that someone comes
> here with a question
> such as "How do I do 'this', using 'that' ?".
> It oftens turns out that 'that' is not the best way of doing 'this',
> but is merely a way
> which the poster heard about from some more or less reputable source.
> Sometimes it is
> even so that 'that' is really unnecessarily complex, insecure,
> unreliable or wrong.
> People here then feel obliged to point this out, and recommend what
> they consider a better
> way of achieving 'this'.
> I think that's also part of the role of a list such as this one.
> 
> To give an egregious example : many people come here asking how they
> can do this or that
> at the Apache httpd front-end level, before proxying a call to Tomcat.
> Then upon further enquiry, it will come up that they are using a
> directive such as
> JkMount /* worker1
> Someone here then is bound to question why they are using a httpd
> front-end at all, and
> recommend that they perhaps get rid of it (and of the original problem
> at the same time).
> No doubt, this also does not match the original OP's question, but may
> not be a bad thing
> to ask, or ?
> 

In fact, André's last bit was going to be my suggestion to the OP, drop Apache altogether.
 Once you move your app to the root level, Apache just becomes overhead (unless you need load-balancing
or somesuch other feature).  I would take option #3 one step further and not even bother zipping
the app into a war file, but deploy it somewhere on the filesystem as an already-exploded
directory (original form).  Then point the ROOT.xml context descriptor at that directory,
making sure the Tomcat user has the needed rights to the directory.

But, by far, the easiest way to accomplish what the OP wants as an end result is to zip the
app into ROOT.war and deploy normally.
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