I emailed this to the backuppc-users AT lists.sourceforge DOT net address last
night but didn't see it go out. My apologies if this is the second time you're
seeing it.
-Mike
I've been struggling with this error for too long and need to ask for some
help. I had BackupPC working when my IP address was set as a pre-defined lease
in my router. But I decided to instead configure the laptop as a DHCP client so
I could back up over Ethernet or wireless. This is the error I now get in the
CGI when attempting to perform a backup:
---
"Error: Can't find IP address for michael-ubuntu
michael-ubuntu is a DHCP host, and I don't know its IP address. I checked the
netbios name of 192.168.1.117, and found that that machine is not
michael-ubuntu. Until I see michael-ubuntu at a particular DHCP address, you
can only start this request from the client machine itself."
---
As others have reported, the IP address is actually correct for my client.
Originally I thought it was a DNS issue, and I chased down a bug in Ubuntu that
doesn't broadcast it's hostname during a DHCP request. Adding the following to
my /etc/dhcp3/dhclient.conf file resolved that:
send fqdn.server-update on
That, in conjunction with running DNSMasq on the router allows me to ping the
target laptop via hostname from the BackupPC server, which wasn't working prior
to this change. However this solved nothing for BackupPC as it still returning
the error above.
Several google searches landed me mostly in the archives of the BackupPC
mailing list, and steered me toward the "NmbLookupFindHostCmd" setting within
config.pl. One post suggested modifying settings for NmbLookupFindHostCmd, but
I'd rather try to stick with standard settings than break things that are there
for a reason. Plus, this was all working fine until I decided to disable
assigned IP addresses in my DHCP settings, so I believe it has the ability to
connect without disabling/modifying this check.
I learned that nmblookup -A <IP_address> is supposed to return a hostname, and
it does not.
To test things, I ran BackupPC_dump as the backuppc user on my server, but I
don't think it tells me anything about this nmblookup situation (although I am
surprised that it claims that the ping response is to slow):
====
$ /usr/share/backuppc/bin/BackupPC_dump -v -f michael-ubuntu
cmdSystemOrEval: about to system /bin/ping -c 1 michael-ubuntu
cmdSystemOrEval: finished: got output PING michael-ubuntu.mikeshome
(192.168.1.117) 56(84) bytes of data.
64 bytes from michael-Ubuntu.mikeshome (192.168.1.117): icmp_seq=1
ttl=64 time=16.5 ms
--- michael-ubuntu.mikeshome ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt
min/avg/max/mdev = 16.507/16.507/16.507/0.000 ms
cmdSystemOrEval: about to system /bin/ping -c 1 michael-ubuntu
cmdSystemOrEval: finished: got output PING michael-ubuntu.mikeshome
(192.168.1.117) 56(84) bytes of data.
64 bytes from michael-Ubuntu.mikeshome (192.168.1.117): icmp_seq=1 ttl=64
time=97.5 ms
--- michael-ubuntu.mikeshome ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt
min/avg/max/mdev = 97.563/97.563/97.563/0.000 ms
CheckHostAlive: returning 97.563
ping too slow: 97.56msec (threshold is 20msec)
$
====
I'm not sure where to go from here. How can I test this nmblookup deal?
Thanks,
Mike
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