invaluable help! Thanks very much indeed :-) If only I'd asked this question a few days ago. D'oh!
From: "Rod Macpherson" <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] To: <[EMAIL PROTECTED]> Subject: RE: [JBoss-user] Multiple deploy of ear, how to steps Date: Tue, 9 Dec 2003 07:19:14 -0800
a) Right
b) Right
c) Right. Adding a new IP is the same as adding a new machine as far as the network is concerned. If you want to make the name public you will have to register it as a public domain name or map an URL like newbie.foo.bar.com to the new address.
I am pretty sure Bill Burke (JBoss Chief Architect and Subscription CD Manager:) is adding a multihome discussion to the documentation.
-----Original Message----- From: Brian Styles [mailto:[EMAIL PROTECTED] Sent: Tue 12/9/2003 5:35 AM To: [EMAIL PROTECTED] Cc: Subject: RE: [JBoss-user] Multiple deploy of ear, how to steps
Thanks Rod ! That makes sense and seems WAY simpler. This should definately be in a doc somewhere! If you don't mind, just to make sure I've got it right:
a) do you just use the hosts file just to test that it's working without having to setup dns
b) >> So if you assign A.B.C.D to your NIC and map it to www.bar.com in DNS
and start JBoss using --host www.bar.com you are in business.
This is the one thing I'm still a bit unsure of. Currently my server has one
live ip address on the internet.
Are all the new ip addresses that you add to the nic local ip addresses, eg:
127.0.0.2 127.0.0.3 etc
Probably not, because putting them into dns won't work. So is each new ip address that you add to the NIC must be a new live ip address? Correct?
thanks again, so much, Brian
>From: "Rod Macpherson" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: <[EMAIL PROTECTED]>
>Subject: RE: [JBoss-user] Multiple deploy of ear, how to steps
>Date: Tue, 9 Dec 2003 05:05:44 -0800
>
>A) Right. You can bind many IP addresses to your NIC card through the
>Advanced tab of the TCP properties or using the ifconfig utility.
>
>B) Right. The example I gave was witha simple hosts file entry. In terms
>of DNS resolving these addresses you would not and should not use the local
>hosts file to map names to addresses. Just map fully qualified names to
>your IP addresses and your NIC will listen for those its been assigned. So
>if you assign A.B.C.D to your NIC and map it to www.bar.com in DNS and
>start JBoss using --host www.bar.com you are in business. You can fire up
>as many JBosses as you have mapped IPs on that machine, being careful to
>set the VM memory settings appropriately.
>
>C) Wrong. Ports are associated with IPs so there are no ambiguities at all.
>
>D) Right. The same considerations that you would use to run concurrent
>processes of any kind apply to multiple instances of JBoss. If you had two
>or three with appropriate amounts of memory and CPU loads you can boost
>performance. This has advantages over multiple threads within a single JVM
>as you can imagine. If you have 20 EAR files deployed you have one heap and
>one GC and also one slice of the CPU pie that the underlying OS has dished
>out to the JVM. That may or may not be a problem, depends on what they are
>doing. In any event, distributing those over a couple JVMs or several JVMs
>(depending on how powerful the box is in terms of CPUs and memory and bus
>speeds...) might be the way to go.
>
>
>
>
> -----Original Message-----
> From: Brian Styles [mailto:[EMAIL PROTECTED]
> Sent: Tue 12/9/2003 3:49 AM
> To: [EMAIL PROTECTED]
> Cc:
> Subject: RE: [JBoss-user] Multiple deploy of ear, how to steps
>
>
>
> Hi Rod,
> thanks for the help. You'll have to excuse my complete newbieness here,
>but
> I'm confused by alot of what you're saying so perhaps you could help me
>out
> some more.
>
> >2. Add two additional IPs to your NIC mapped to foo and bar for
> >convenience (say, in /windows/system32/drivers/etc/hosts).
>
> A) First off I kinda thought that you can only have 1 ip address per
>Network
> Interface Card, however looking it up in google I see I was wrong :-)
> However, perhaps I could get a bit of hand holding with this. Say my
>server
> ip address is:
>
> 198.182.196.56 and is currently running my website. Now I want to add
> serveral other websites, virtually hosted, to the box. What ip addresses
>do
> I add to the hosts file, are they all local addresses? For example:
>
> 127.0.0.1 localhost
> 127.0.0.2 www.foo.com
> 127.0.0.3 www.bar.com
>
> would that be correct?
>
> B) Then, you run each configuration of jboss.
>
> > run.bat -c foo --host foo
> > run.bat -c bar --host bar
>
> however, I'm a bit unclear as to how dns will resolve the single
> 198.182.196.56 ip address to all the virtual hosts. is this what the -host
> command does? If so, should I be running
>
> > run.bat -c bar --host www.bar.com
>
> C) Also, all the ports will presumably clash. So is there a way to easily
> avoid this?
>
> D) Are there issues with performance here. For example, say a box is
>running
> 20 sites, that's 20 jboss versions running as opposed to one version with
>20
> ears deployed....
>
> thanks very much for your help,
> Brian
>
>
> >From: "Rod Macpherson" <[EMAIL PROTECTED]>
> >Reply-To: [EMAIL PROTECTED]
> >To: <[EMAIL PROTECTED]>
> >Subject: RE: [JBoss-user] Multiple deploy of ear, how to steps
> >Date: Mon, 8 Dec 2003 16:29:15 -0800
> >
> >How about just making a copy of your configuration and launching it
> >bound to a different host? That way you do not have to change anything
> >provide you are using the no-arg InitialContext.
> >
> >Example:
> >
> >1. Create copies of your configuration folder: /jboss/server/orginal ->
> >/jboss/server/foo and /jboss/server/bar
> >2. Add two additional IPs to your NIC mapped to foo and bar for
> >convenience (say, in /windows/system32/drivers/etc/hosts).
> >3. Launch using shortcut, in this case the hostname and configuration
> >happen to be the same:
> >
> > run.bat -c foo --host foo
> >
> >4. Rinse and repeat.
> >
> > run.bat -c bar --host bar
> >
> >Ditto for Linux more or less. Make sure you DO NOT run the same
> >configuration twice and remove
> >/jboss/server/whaddeva/deploy/snmp-adapter.sar, from every instance.
> >That's about it.
> >
> >
> >
> >
> >-----Original Message-----
> >From: Brian Styles [mailto:[EMAIL PROTECTED]
> >Sent: Monday, December 08, 2003 2:18 AM
> >To: [EMAIL PROTECTED]
> >Subject: [JBoss-user] Multiple deploy of ear, how to steps
> >
> >
> >Hi all,
> >
> >This list has been very helpful to me so I thought I'd write some notes
> >on
> >things I experienced in order to get the same application deployed and
> >virtual hosted multiple times on jboss-3.2.2. This has been a common
> >enough
> >query on the lists and the forums.
> >
> >The application was a standard enough struts---->sesssion beans & MDBs
> >---->
> >cmr-entity beans
> >packaged as an ear file
> >
> >Issues with deployment are:
> >
> >1) If you deploy ejbs in two ears then the jndi names will conflict, so
> >you
> >must change the jndi names for each deployed bean. Xdoclet allows you to
> >do
> >this easily. You don't have to rename the ejbs, just change the jndi
> >mappings
> >
> >2) Unfortunately xdoclet doesn't currently support creating jndi
> >mappings
> >for MDBs so you can't easily change their names. However apparently this
> >was
> >recently realised and a patch has been created.
> >http://www.mail-archive.com/[EMAIL PROTECTED]/msg33920.ht
> >ml
> >(I presume that this means it will be available in the next version of
> >xdoclet?)
> >
> >3) Also, you have to add the queues to jbossmq-destinations-service.xml.
> >
> >4) I'm using mysql, and so for each ear deployed I wanted to connect to
> >a
> >different database. For this you must add a new datasource. I created a
> >different mysql-ds.xml file for each one.
> >
> >5) I was unable to successfully get ears to successfully use their
> >correct
> >database until I added a jboss-app.xml file to META-INF containing the
> >following:
> >
> ><jboss-app>
> >
> ><loader-repository>myapp.com:loader=nameofmyear.ear</loader-repository>
> ></jboss-app>
> >
> >This loads the ear with a different classloader. It fixed my problems
> >(not
> >too sure why).
> >
> >6) I used to keep the struts and commons jar files in
> >myapp.war/WEB-INF/lib.
> >However when multiple versions of the app are running, then I got
> >errors. By
> >removing all the jars from this folder and putting them in
> >server/yourconfig/lib I fixed the problem.
> >
> >7) Then to add virtual hosting, first add the following line to your
> >myapp.war/jboss-web.xml file:
> >
> ><virtual-host>www.whatever.com</virtual-host>
> >
> >8) Then add the corresponding entry to
> >
> >
> >server/yourconfig/deploy/jbossweb-tomcat41.sar/META-INF/jboss-service.xm
> >l
> >
> ><Host name="www.whatever.com">
> > <Valve className="org.apache.catalina.valves.AccessLogValve"
> >prefix="xyz"
> >directory="${jboss.server.home.dir}/log"/>
> ></Host>
> >
> >within the engine tag.
> >
> >If you want to test that the virtual hosting is working, you'll have to
> >edit
> >your dns. For linux guys, that's probably easy. However if you're a
> >newbie
> >and a windows user like me, you can download a dns server and run it
> >locally
> >to test your virtual hosting. The one I used was called posadis from
> >sourceforge and was simple and worked fine.
> >
> >That's about it.
> >
> >A few things to know that would be good are:
> >
> >a) how many virtual hosted apps can easily be run on a single jboss.
> >This
> >probably depends on memory and cpu and load on each etc, but just if
> >anyone
> >has experience such as - "I run 100 virtual hosted apps on jboss" etc.
> >that
> >would be good to know.
> >
> >b) Is it possible to set up a different log file for each deployed
> >application? If so, how.
> >
> >anyway, hope this helps others out there.
> >thanks,
> >Brian
> >
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