[LON-CAPA-admin] Problem with hardware migration

[Stuart Raeburn]

Hello,

> I cannot log in with a locally authenticated (LDAP)
> account.
>
> What could be wrong?  Is there any log files other than
> /home/httpd/perl/logs/ and /var/log/httpd/ that I could examine?

Have you been able to test the result of calling the localauth  
subroutine in your custom /home/httpd/lib/perl/localauth.pm outside of  
LON-CAPA, i.e., via a test perl script run as the user www on the  
command line?

> I am switching from a 32 bit to a 64 bit server, but I did
> run the db_copy.pl script.

Tis should not be an issue here as the authentication type used by a  
user with localauth is read from a text file, not a GDBM db file.

The call to use your customized /home/httpd/lib/perl/localauth.pm to   
authenticate a user in your domain occurs in /home/httpd/perl/lond

If you make changes to that module you will need to restart loncontrol:

/etc/init.d/loncontrol restart

for the calls from lond to use them.

Logging information stored in lond via LON-CAPA's &logthis() mechanism  
will be stored in /home/httpd/perl/logs/lond.log

You can test this out by returning a value of -1 from your localauth  
subroutine in /home/httpd/lib/perl/localauth.pm

This is the section of lond which implements the logging for this case:

if ($validated < 0) {
     &logthis("localauth for $contentpwd $user:$domain returned a $validated");
     $validated = 0;
}

Any debugging information you capture via

"print STDERR"

lines added to localauth.pm will be written to  
/home/httpd/perl/logs/lond_errors.

The contents of the lond_errors file are not stored permanently, as  
the file is overwritten with a new empty file when the LON-CAPA  
daemons are started (or restarted) via:

/etc/init.d/loncontrol restart

Stuart Raeburn
MSU LON-CAPA group

Quoting Andreas Knab <knab2ar at jmu.edu>:

> Hello!
>
> I am having problems with moving LON CAPA to a new server.  I followed
> the instructions for Hardware Upgrades and the new server is up and
> running, but I cannot log in with a locally authenticated (LDAP)
> account.  I am switching from a 32 bit to a 64 bit server, but I did
> run the db_copy.pl script.
>
> I know the localauth.pm file is being loaded - if there is a syntax
> error in that file, lond won't start.
>
> I know that LON CAPA reads the passwd file for my user account - when
> I go to password reset it correctly tells me that the password cannot
> be reset through LON CAPA.  If I try to reset a password for a
> non-existing account, it correctly tells me that as well.
>
> When I try to log in though, I get back to the login screen without
> any messages or errors displayed.  As far as I can tell, the code in
> localauth.pm is not being executed, although I am not 100% sure.  I
> have some print STDERR statements in there, but they don't seem to
> appear in any log file, and trying to cause exceptions in the code
> also does not produce any errors in the browser or any log file.  I
> also tried to immediately return 1; with no luck.
>
> What could be wrong?  Is there any log files other than
> /home/httpd/perl/logs/ and /var/log/httpd/ that I could examine?
>
> Thanks for any suggestions or hints.
>
> Andreas
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