I'm in the process of configuration Tomcat 4.1.27 to communicate with Apache
1.3.28 through mod_jk on a single machine. I have several virtual hosts set up
on my server in the following way: /home/vhost1, /home/vhost2, etc.. I would
like to configure Apache/Tomcat to allow users of these vhosts to serve
JSPs/Servlets from beneath their home directories, e.g.:
/home/vhost1/public_html/webapps/ and /home/vhost2/public_html/webapps/. From my
reading, I understand that this can be accomplished by:
- setting the appBase attribute of the <Home> tag in the server.xml to those
absolute directories:
<Home appBase="/home/vhost1/public_html/webapps/"...>
...
<Home appBase="/home/vhost2/public_html/webapps/"...>
- setting the docBase/path attributes in the child <Context> tag to some
directory within the appBase path:
<Home appBase="/home/vhost1/public_html/webapps/"...>
<Context docBase="app1" path="/app1"...>
...
<Home appBase="/home/vhost2/public_html/webapps/"...>
<Context docBase="app1" path="/app1"...>
sorry, should be app2 :~
This would cause the primarly application "app1" to be served out of vhost1's home from /home/vhost1/public_html/webapps/app1, and another applicationed "app1" belonging to vhost2 to be served out of /home/vhost2/public_html/webapps/app1. This is my understanding of these attributes, though I don't quite get what the distinction between docBase and path is, as I've not found a decent enough description nor a solid example to set these in stone for me.
My questions: 1: Would the aforementioned configuration properly serve JSPs/Servlets from locations beneath vhost1 and vhost2's home directories?
you can also use something linke appBase="webapps/app1/" then your base will be at $CATALINA_BASE/webapps/app1/
2: What exactly do the docBase and path attributes define within the Context tag? What is the distinction?
path= the virtual path in the URI. so path=/app1 (for your my.first.virtualhost) makes
you app available at my.first.virtualhost/app1/.....
docBase tells tomcat where to find the application locally (when not starting with
a slash, it is relative to you appBase)
you do not need to define your contexts within the server.xml, it is also possible to
do that in web.xml files
3: It is possible to have a single worker handle requests for more than one web
application belonging to more than one virtual host/user. How beneficial would
it be to have a single worker handle requests sent to it from Apache for more
than one virtual host? Would it be more efficient to have one worker for each
virtual host and have a load balancing worker to manage those subordinate
workers?
yes, put the second engine in the first service element. (and remove the second service element:)
4: What sort of mechanisms to workers use to handle requests? Does a worker
receive a request, fork(), child process handles the request, communicates with
the Tomcat JVM, and returns the result to the requesting client, while the
parent simply sits and listens for more connections? If this is the case, would
a load balancer really serve to benefit anything if all this is taking place on
a single machine, given that all the workers would be of type ajp13?
dunno exactly really. that loadbalancing was from a example workers.properties
I'm trying to achieve and optimal, secure configuration. One that would allow
the users to manage their own web applications within their home directories so
I don't have to open up rwx access to the world beneath the $TOMCAT_HOME
directory. Granted, I'll still have to amend server.xml to insert new contexts
for users adding new WARs, but this is trivial. I've read a number of articles
and even the manual describing configuration options, etc., but it seems that
there are just a few points missing that would really put things into
perspective for me, so I'm sending these, probably simple, questions to the
list, as my last resort. Any information or links would be greatly appreciated,
and hopefully I'll be able to get everything organized efficiently and securely.
Christopher Garrett III Inixoma, Incorporated
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Sorry 'bout the strange setup i gave you. But i am running mulptiple versions of
tomcat on one machine. So it is easier to have absolute path names in my
server.xml.
Fred
"There are 10 types of people when it comes to binary, those that understand it.. and those who don't."
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