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Re: 20010126: LDM logfiles and server access

Erick Lorenz wrote:
> 
> Anne:
> 
> I wrote you earlier about the difficulties I was having both with getting
> data from typhoon and also with my log files.
> 
> 1.  I am getting data from typhoon as of this morning.  Appearently James
> had to modify both the
>     regular "allow" file and a failover "allow" file by adding my numerical
> IP address before it
>     stop denying me access.
> 

The ldm wants to verify your host.  It trys to lookup both the host name
and the IP address.  If either one fails or they don't agree, it will
exit.

I wonder if James can do the following:
        nslookup <yourHostName>
        nslookup <yourIPAddress>
both should resolve to your machine.  This would reveal if his name
server has a problem.  It works for me on my machine, imogene:

(anne) imogene:/home/anne 8 % nslookup atm25.ucdavis.edu
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

Name:    atm25.ucdavis.edu
Address:  169.237.35.25

(anne) imogene:/home/anne 9 % nslookup 169.237.35.25
Server:  laraine.unidata.ucar.edu
Address:  128.117.140.62

Name:    atm25.ucdavis.edu
Address:  169.237.35.25

Is James failing over a lot???  Otherwise, not having your IP address in
his failover configuration file shouldn't affect you.


> 2.  The log files are being generated allbeit in a strange way.  Actually
> this is what was
>     happening before I started to mess around with them.  There are four
> files:
> 
>         -rw-r--r--    1 ldm      unidata        0 Jan 29 00:00 ldmd.log
>         -rw-r--r--    1 ldm      unidata   762105 Jan 29 12:42 ldmd.log.1
>         -rw-r--r--    1 ldm      unidata   150792 Jan 28 01:00 ldmd.log.2
>         -rw-r--r--    1 ldm      unidata   625483 Jan 27 18:52 ldmd.log.3
> 
>     As you can see the ldmd.log has been initialize but the messages
> continue going to
>     to ldmd.log.1 as this later listing shows:
> 
>         -rw-r--r--    1 ldm      unidata        0 Jan 29 00:00 ldmd.log
>         -rw-r--r--    1 ldm      unidata   762272 Jan 29 12:47 ldmd.log.1
>         -rw-r--r--    1 ldm      unidata   150792 Jan 28 01:00 ldmd.log.2
>         -rw-r--r--    1 ldm      unidata   625483 Jan 27 18:52 ldmd.log.3
> 
> I sent you copies of all the relevant configuration files earlier.  They
> all seem to point to ldmd.log as the file that should be written to.  At
> least I am getting a record but I have to look at it with a shell command
> rather than with "ldmadmin log" as that shows nothing as if it is reading
> ldmd.log.  If I leave a screen running "ldmadmin tail" I do get the reports
> but I think this only works after the logs have been automatically rotated
> once and ldmd.log.1 has been created.
> 

I don't think that your ldm is hup'ing the syslog daemon properly.  Send
it a hup signal like you did before and let me know if that causes it to
write to ldmd.log (and *not* ldmd.log.1).  (I believe that was the
outcome before.)


I would like you to do the test that I mentioned in my earlier message. 
The test would be something like:

1. Comment out the local0 line in /etc/syslog.conf
2. Send the syslog deamon a HUP signal.  Now it doesn't know anything
about local0.
3. Comment *in* the local0 line in /etc/syslog.conf
4. Stop and restart the ldm.  This should rotate the logs and cause
messages to go to ldmd.log (not ldmd.log.1).

If this doesn't work then there's a problem with the code.

Are you using local0 for any other logging on your system?  Does it
appear anywhere else in syslog.conf?

> Thanks
> 
> Erick Lorenz
> 
>   +--------------------------------------------------------------------------+
>   | Erick Lorenz, Programmer/Analyst                     Voice: 530-752-8297 |
>   | Atmospheric Science                                  FAX:   530-752-1552 |
>   | Land, Air & Water Resources                                              |
>   | University of California, Davis            e-mail:  address@hidden |
>   +--------------------------------------------------------------------------+

You're welcome.

Anne
-- 
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Anne Wilson                     UCAR Unidata Program            
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                                  Boulder, CO  80307
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