Amanda-Users

Need help diagnosing hostname problems

2005-10-19 12:08:35
Subject: Need help diagnosing hostname problems
From: "KEVIN ZEMBOWER" <KZEMBOWE AT jhuccp DOT org>
To: <amanda-users AT amanda DOT org>
Date: Wed, 19 Oct 2005 11:56:52 -0400
I had an amanda setup that worked fine until two weeks ago, when I had to 
change the network addresses of all my hosts and move them into a separate DMZ, 
using a different, new DNS. Now, I'm not able to get one host to respond, and 
the output is puzzling:

amanda@cn2:/tmp/amanda-dbg$ amcheck -c DBackup

Amanda Backup Client Hosts Check
--------------------------------
ERROR: www.jhuccp.org: [addr 10.253.192.205: hostname lookup failed]
Client check: 2 hosts checked in 0.702 seconds, 1 problem found

(brought to you by Amanda 2.4.4p3)
amanda@cn2:/tmp/amanda-dbg$ dig www.jhuccp.org

; <<>> DiG 9.2.4 <<>> www.jhuccp.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41347
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.jhuccp.org.                        IN      A

;; ANSWER SECTION:
www.jhuccp.org.         3600    IN      A       10.253.192.204

;; Query time: 2 msec
;; SERVER: 10.23.2.10#53(10.23.2.10)
;; WHEN: Wed Oct 19 11:36:58 2005
;; MSG SIZE  rcvd: 48

amanda@cn2:/tmp/amanda-dbg$ 

I'm puzzled by the response in amcheck, "ERROR: www.jhuccp.org: [addr 
10.253.192.205: hostname lookup failed]" compared to the correct response in 
dig, ";; ANSWER SECTION: www.jhuccp.org.         3600    IN      A       
10.253.192.204". The IP address that amcheck responded with, 10.253.192.205, is 
the IP for the tapehost itself, cn2. Is amcheck complaining that 10.253.192.204 
doesn't resolve to www.jhuccp.org (it shouldn't; www.jhuccp.org is 205), or is 
it complaining that 10.253.192.205 doesn't resolve correctly to the name of the 
tapehost?

I tried to check the debug files generated in /tmp/amanda-dbg/. There were four 
files generated from 'amcheck -c DBackup', but none of them seemed to contain 
any information regarding this failure.

Thanks for any suggestions or advice in working on this problem.

-Kevin Zembower



-----
E. Kevin Zembower
Internet Systems Group manager
Johns Hopkins University
Bloomberg School of Public Health
Center for Communications Programs
111 Market Place, Suite 310
Baltimore, MD  21202
410-659-6139


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