Question

How to setup Apache authentication against Oracle 9i in FreeBSD?

Asked by: iuhh

Hi,

I'm running Apache2 with Tomcat 5.5 (Java 1.4) on Freebsd 5.3, and I'll need to find a way to authenticate against a Oracle 9i database (running elsewhere).  Did you have any similar experiences?  I'm out of options at the moment, and I really appreciate any help.  Here's what I've tried:

1: mod_auth_oracle
There isn't a FreeBSD port, thus I had to compile it from source, with oracle-instant-client libraries from freebsd port.  Since it requires linux-compatibility library, even though I have successfully compiled the module with gmake, it always result in apache core dumps.  Thus I guess mix and matching bsd libraries and linux compatibility libraries is a dead-end.  I've tried the freebsd-question mailing list but I don't get any answers. (please see http://docs.freebsd.org/cgi/getmsg.cgi?fetch=646936+0+current/freebsd-questions for the setup details).

2: mod_auth_radius + freeradius with oracle support
Attempted it but it seems to be too complicated and overkill to setup a freeradius server just for this simple authentication task, thus I decided against it.

3: mod_auth_any and mod_auth_external with external authenticator
I've also tried to combine an external authenticator written in Java using JDBC oracle connection, with the above two modules.  mod_auth_any was too lacking in documentation and I didn't get it to work.  mod_auth_external worked but JDBC connection is too slow to be used in any production environment (~3s per authentication request!! the delay goes up all the way to 5 minutes if there's 100 requests per second!! ).  Tried combining with mod_authencache, and it didn't seem to make much difference.

I suppose my remaining option would probably involving in writing a custom shell script or perl script that calls sqlplus (which works in fbsd with linux libs, btw) to authenticate, then plug that in; however that does seem to be too much work and far too insecure way to accomplish this task.  Although I didn't find it - is there any ready-made perl5 oracle authentication module that already works on Freebsd?  Do you know any success stories for setting up apache authentication against oracle in Freebsd?  What other options would you have?

Many thanks for all your help.

Cheers,
HH

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Asked On
2005-06-29 at 17:19:58ID21475691
Tags

authentication

,

mod_auth_oracle

,

oracle

Topic

FreeBSD

Participating Experts
2
Points
500
Comments
12

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Answers

 

by: gheistPosted on 2005-06-30 at 01:44:54ID: 14336351

1. there cannot be - oracle makes no drivers for freebsd
2. oracle ships LDAP server, i donot now if/how it works
3. see http://www.oracle.com/technology/tech/java/sqlj_jdbc/htdocs/jdbc_faq.htm especially about nodelay
*. this works, i have not heard stories, but you may get them in Oracle TA by moving your question there

 

by: iuhhPosted on 2005-06-30 at 09:31:57ID: 14339948

Hi gheist,

Thanks a lot for your reply.  I am aware that there is no native oracle drivers available for FreeBSD.  However, the recent oracle instant client (10.1) does indeed work on Freebsd - there's even its port in the ports tree!  That client is dependent on the Linux compatibility libraries, hence I was unable to compile anything that depends on it, apart using the included sqlplus in the original linux ELF binary form.  So maybe one other option is to compile an authenticator in Linux ELF format, and run it in bsd in compatibility mode, then hook it to mod_auth external.

As for LDAP, I still see it as an overkill for apache authentication.  Java virtual machine setup and teardown is far too much of an overhead for reducing TCP waiting time to have any significance.  However I'm still pounding on the option to build a bespoke java servlet just to do the authentication, thus reducint the need to invoke java everytime, and can do some caching as well.  What would you think?

Cheers.

 

by: gheistPosted on 2005-06-30 at 12:40:03ID: 14341707

What has Java emulator and Linux emulator to do with FreeBSD system ???
Probably Linux with Java and Apache is answer to your questions.

 

by: iuhhPosted on 2005-06-30 at 17:09:19ID: 14343744

Java was used to connect to oracle.  I've compiled native fbsd java binaries, and used that to write a java class that uses jdbc-oracle to do the authentication checking against the oracle database.  

Oracle's instant client runs on Freebsd in Linux compatibility mode, and hence I was unable to compile any fbsd binaries/modules that depends on it.

Linux is out of the question as our servers are all FreeBSD based.

 

by: gheistPosted on 2005-07-02 at 11:16:52ID: 14355005

Then stop running unsupported databases....

 

by: ravigoruPosted on 2005-07-06 at 02:29:15ID: 14376014


am not very sure.. but a small clue..

if jdbc 's performance is not that fine.. then why can not be perl DBI and Oracle DBD tried..with a persistent connection !!

thanks ..

 

by: gheistPosted on 2005-07-06 at 06:49:17ID: 14377772

beause it is linux and windows library of your choice.

 

by: iuhhPosted on 2005-07-06 at 16:43:16ID: 14383267

Thanks for your replies.  I tried a shell wrapper around sqlplus, and managed to get ~20 requests per second (that's 10 faster than jdbc).  That's also 10x slower than mod_auth_oracle that I've tried on a linux box (~200 requests per second) - and even slower than mod_auth_mysql (~400 requests per second).

I don't know much about perl, but I'll give DBD-Oracle a try.  However, how would I plug that into apache?  Is there any module that does it?  If I am to hook the perl script with the mod_auth_external again, I don't know how a connection can be persistent as a new process is forked everytime mod_auth_external does a lookup.  

 

by: ravigoruPosted on 2005-07-08 at 09:16:33ID: 14398416


yes, when a shell wrapper is working fine then thers more possibility for better performance with a persistent connection.

case 1: using perl .. the database connection will be a global variable.. and can be accessed with the authenticator script  and reestablished only when its not visible or can not be imported.

case 2: there can be a script, which ( the forked process by apache ) will write all data (usernames/passwds) to some shared memory and looks for the reply from the authenticator which should be working like a service and the only one process that opens a single databaseconnection. ( i think, this is a bit  tough to implement  )

case 3: please, let me know if any of the above cases works for u :-)

BOL !!

20120131-EE-VQP-002

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