Re: [BackupPC-users] ping failures: dhcp clients and different subnets
Hi,
sorry for the delay, I just found your mail in the depths of my mailbox.
Tobias Mayer wrote on 2011-05-19 10:50:49 +0200 [Re: [BackupPC-users] ping
failures: dhcp clients and different subnets]:
[...]
Can anyone with knowledge of the code please have a look at this?
You don't really need any knowledge of the code.
On 17.05.2011 20:17, Tobias Mayer wrote:
[...]
To circumvent this, i simply removed the else { from line 1718.
That most certainly breaks things. Whatever was in the else clause was meant
to happen under some circumstances. Now it only happens for your if or
elsif case.
I don't use DHCP clients myself, so I'd have to take a closer look, but I'm
rather confident that it's a configuration issue rather than a problem in the
code. The issue of what the DHCP flag in the hosts file means seems to be
rather easy to misunderstand. If I can find the time, I'll take a look and
follow up. Isn't there a wiki page on this topic? There should be ...
Regards,
Holger
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Re: [BackupPC-users] ping failures: dhcp clients and different subnets
On 17.05.2011 20:17, Tobias Mayer wrote:
Hi,
I'm running into problems by using backuppc with dhcp clients which are
using a different subnet then the backuppc server.
(It's not possible to use backuppc server and clients in the same subnet
in this case. DNS Server doesn't accept DynamicDNS entries.)
Error:
Backup Process don't start because of ping fails.
Pings to sec43-dyn27 have failed 550 consecutive times.
I have customize the NmbLookupFindHostCmd variable in config.pl and
using the program nbtscan to get netbiosnames.
$Conf{NmbLookupFindHostCmd} =
'/usr/local/BackupPC/bin/BackupPC_get_HostIP $host';
content:
#!/bin/sh
test ! -z $1 || { echo keinen HOST angegeben ;exit 1;}
SEARCH=$1
FILE='/tmp/pclist.txt'
/usr/sbin/nbtscan -s : subnet1$FILE
/usr/sbin/nbtscan -s : subnet2 $FILE
/usr/sbin/nbtscan -s : subnet3 $FILE
/usr/sbin/nbtscan -s : subnet4 $FILE
IP=`grep -i $SEARCH $FILE | cut -d : -f1`
echo $IP $SEARCH
output is (example):
192.168.1.1 sec43-dyn27
If I start a backup from the console as backuppc userBackupPC_dump -i
sec43-dyn27 then everything is fine. But if I perform a backup from the
webfrontend then nothing happens besides the increasing of ping failure
counter.
Any suggestions?? Which programs will be startet in which order when I
perform the backup from the webfrontend???
Thanks in advance.
Heiko
btw: If I set the variable PingCmd to $Conf{PingCmd} = '/bin/true'
then I got the same failure.
Hi Heiko!
I seem to have the same problem as you, without the client PCs being on a
different subnet, so it's a little easier for me. But i do not think this
actually matters.
After looking at the code of the main BackupPC script for a while,
- and adding a lot of additional logging output -
i noticed that the sub(routine) QueueOnePC does not put the Task into
the queue if the specified host is a dhcp one. To circumvent this, i simply
removed the else { from line 1718.
Also, the BackupPC_dump script exits with return code 1 if given the
IP-address
instead of the hostname, so i changed the lines containg the
unshift-commands
to fill the host-variable with $host instead of $hostIP in lines 1733,
1740 and 1748.
with these changes, BackupPC_dump is called correctly, but i don't know if i
broke something else in the process.
rsync is still running on my client, so i'm waiting for the incremental backup
to succeed or fail.
also, i'm not sure that this will fix scheduled backups as well.
I hope i can spend some more time on this tomorrow, and will report on my
progress
as soon as i make some.
Best regards,
Tobias Mayer
after leaving BackupPC running with my changes it seems to work for my
Windows 7 Client. (both manual and scheduled jobs)
Unfortunately I can not test this on linux/*nix clients right now, since
we simply don't have any. So my changes are likely to break something
in other configurations.
Can anyone with knowledge of the code please have a look at this?
Thanks,
Tobias
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Re: [BackupPC-users] ping failures: dhcp clients and different subnets
Hi,
I'm running into problems by using backuppc with dhcp clients which are
using a different subnet then the backuppc server.
(It's not possible to use backuppc server and clients in the same subnet
in this case. DNS Server doesn't accept DynamicDNS entries.)
Error:
Backup Process don't start because of ping fails.
Pings to sec43-dyn27 have failed 550 consecutive times.
I have customize the NmbLookupFindHostCmd variable in config.pl and
using the program nbtscan to get netbiosnames.
$Conf{NmbLookupFindHostCmd} =
'/usr/local/BackupPC/bin/BackupPC_get_HostIP $host';
content:
#!/bin/sh
test ! -z $1 || { echo keinen HOST angegeben ;exit 1;}
SEARCH=$1
FILE='/tmp/pclist.txt'
/usr/sbin/nbtscan -s : subnet1 $FILE
/usr/sbin/nbtscan -s : subnet2 $FILE
/usr/sbin/nbtscan -s : subnet3 $FILE
/usr/sbin/nbtscan -s : subnet4 $FILE
IP=`grep -i $SEARCH $FILE | cut -d : -f1`
echo $IP $SEARCH
output is (example):
192.168.1.1 sec43-dyn27
If I start a backup from the console as backuppc userBackupPC_dump -i
sec43-dyn27 then everything is fine. But if I perform a backup from the
webfrontend then nothing happens besides the increasing of ping failure
counter.
Any suggestions?? Which programs will be startet in which order when I
perform the backup from the webfrontend???
Thanks in advance.
Heiko
btw: If I set the variable PingCmd to $Conf{PingCmd} = '/bin/true'
then I got the same failure.
Hi Heiko!
I seem to have the same problem as you, without the client PCs being on a
different subnet, so it's a little easier for me. But i do not think this
actually matters.
After looking at the code of the main BackupPC script for a while,
- and adding a lot of additional logging output -
i noticed that the sub(routine) QueueOnePC does not put the Task into
the queue if the specified host is a dhcp one. To circumvent this, i simply
removed the else { from line 1718.
Also, the BackupPC_dump script exits with return code 1 if given the IP-address
instead of the hostname, so i changed the lines containg the unshift-commands
to fill the host-variable with $host instead of $hostIP in lines 1733,
1740 and 1748.
with these changes, BackupPC_dump is called correctly, but i don't know if i
broke something else in the process.
rsync is still running on my client, so i'm waiting for the incremental backup
to succeed or fail.
also, i'm not sure that this will fix scheduled backups as well.
I hope i can spend some more time on this tomorrow, and will report on my
progress
as soon as i make some.
Best regards,
Tobias Mayer
--
tobias.ma...@hhi.fraunhofer.de
Tel +49 30 314-28691
Fraunhofer Heinrich Hertz Institute /
Technische Universität Berlin
Einsteinufer 17, 10587 Berlin, Germany
www.hhi.fraunhofer.de
--
Visit us at
SID Display Week 2011 / May 15-20 / Los Angeles, CA, USA / booth 1019-4 (German
Pavilion)
www.hhi.fraunhofer.de/sid
Compound Semiconductor Week 2011 / May 22-26 / Berlin, Germany / Maritim
proArte Hotel
http://conference.vde.com/csw2011/pages/homepage.aspx
From Data Collection to Display - Technology Conference and Exhibition
University of California, Berkeley, USA / May 26
http://www.hhi.fraunhofer.de/ucberkeley
--
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What every C/C++ and Fortran developer should know.
Learn how Intel has extended the reach of its next-generation tools
to help boost performance applications - inlcuding clusters.
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[BackupPC-users] ping failures: dhcp clients and different subnets
Hi,
I'm running into problems by using backuppc with dhcp clients which are
using a different subnet then the backuppc server.
(It's not possible to use backuppc server and clients in the same subnet
in this case. DNS Server doesn't accept DynamicDNS entries.)
Error:
Backup Process don't start because of ping fails.
Pings to sec43-dyn27 have failed 550 consecutive times.
I have customize the NmbLookupFindHostCmd variable in config.pl and
using the program nbtscan to get netbiosnames.
$Conf{NmbLookupFindHostCmd} =
'/usr/local/BackupPC/bin/BackupPC_get_HostIP $host';
content:
#!/bin/sh
test ! -z $1 || { echo keinen HOST angegeben ;exit 1;}
SEARCH=$1
FILE='/tmp/pclist.txt'
/usr/sbin/nbtscan -s : subnet1 $FILE
/usr/sbin/nbtscan -s : subnet2 $FILE
/usr/sbin/nbtscan -s : subnet3 $FILE
/usr/sbin/nbtscan -s : subnet4 $FILE
IP=`grep -i $SEARCH $FILE | cut -d : -f1`
echo $IP $SEARCH
output is (example):
192.168.1.1 sec43-dyn27
If I start a backup from the console as backuppc user BackupPC_dump -i
sec43-dyn27 then everything is fine. But if I perform a backup from the
webfrontend then nothing happens besides the increasing of ping failure
counter.
Any suggestions?? Which programs will be startet in which order when I
perform the backup from the webfrontend???
Thanks in advance.
Heiko
btw: If I set the variable PingCmd to $Conf{PingCmd} = '/bin/true'
then I got the same failure.
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