[Monitorix-general] Network Traffic and Usage Problem Graph, FreeBSD
Hello,
First, thank you for creating monitorix. I've used to it monitor
several CentOS servers I administered for a few years and it has
proved to be very useful.
I have no idea if I this is the right way to report a bug so my
apologies if this is the wrong way to go about doing it.
I also happen to administer some FreeBSD systems. I recently found
what I think is a bug in the code for collecting network statistics
under FreeBSD. I noticed that the main graph in the Network Traffic
and Usage graph section is always blank. No traffic is ever logged.
However, the traffic error section always logs data as if my network
interface is continually generating packet errors.
I believe I have found the cause of the problem and enclose a patch for it.
I think some of the columns from netstat -nibd are being logged in the
wrong order -
open(IN, netstat -nibd |);
while(IN) {
if(/Link/ /$NET_LIST[$n]/) {
(undef, undef, undef, undef, $net_packs_in[$n],
$net_error_in[$n], $net_bytes_in[$n], $net_packs_out[$n],
$net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
}
}
compare this with the actual output of a netstat -nibd command :
NameMtu Network Address Ipkts Ierrs Idrop
IbytesOpkts Oerrs Obytes Coll Drop
ipfw0 65536 Link#1 0 0 0
00 0 0 00
lo0 16384 Link#2 0 0 0
00 0 0 00
lo0 16384 fe80:2::1/64 fe80:2::10 - -
00 - 0 --
lo0 16384 ::1/128 ::1 0 - -
00 - 0 --
lo0 16384 127.0.0.0/8 127.0.0.10 - -
00 - 0 --
em01500 Link#3 08:00:27:09:3e:7c30976 0 0
4368417221128 01183551 00
em01500 192.168.10.0/24 192.168.10.15 30970 - -
4324873121126 - 887703 --
$net_packs_in[$n] = Ipkts (correct)
$net_packs_error_in[$n] = Ierrs (correct)
$net_bytes_in[$n] = Idrop (should be Ibytes, next column)
$net_packs_out[$n] = Ibytes (should be Opkts, next column)
etc
The solution is to add one more undef after $net_error_in[$n] thus :
if(/Link/ /$NET_LIST[$n]/) {
(undef, undef, undef, undef, $net_packs_in[$n],
$net_error_in[$n], undef, $net_bytes_in[$n], $net_packs_out[$n],
$net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
}
I first noticed this on version 1.5.1 (FreeBSD ports) and it still
appears to be there in v. 2.0.0 and 2.1.0 (source), which I am now
running.
Best regards,
Sean
--- monitorix.org 2011-03-14 16:38:51.0 +0800
+++ monitorix 2011-03-14 16:38:22.0 +0800
@@ -1973,7 +1973,7 @@
open(IN, netstat -nibd |);
while(IN) {
if(/Link/ /$NET_LIST[$n]/) {
- (undef, undef, undef, undef,
$net_packs_in[$n], $net_error_in[$n], $net_bytes_in[$n], $net_packs_out[$n],
$net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
+ (undef, undef, undef, undef,
$net_packs_in[$n], $net_error_in[$n], undef, $net_bytes_in[$n],
$net_packs_out[$n], $net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
last;
}
}
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Re: [Monitorix-general] Network Traffic and Usage Problem Graph, FreeBSD
Hello Sean,
Many thanks for using Monitorix and for your kind words about it.
Well, I think we have a problem of FreeBSD versions here. Let me show
what I get issuing the same command as you:
$ netstat -nibd
NameMtu Network Address Ipkts Ierrs Ibytes
Opkts Oerrs Obytes Coll Drop
le01500 Link#1 00:0c:29:10:ca:16 5985 0 822418
5321 03729407 00
le01500 192.168.1.0/2 192.168.1.162 5686 - 724874
5021 -3646513 --
plip0 1500 Link#2 0 0 0
0 0 0 00
lo0 16384 Link#36722 0 711434
6722 0 711434 00
lo0 16384 fe80:3::1/64 fe80:3::10 - 0
0 - 0 --
lo0 16384 ::1/128 ::1 44 - 4724
44 - 4724 --
lo0 16384 127.0.0.0/8 127.0.0.1 6678 - 706710
6678 - 706710 --
As you can see I don't have the 'Idrop' column in my output, and that's
probably is the definitive cause of the problem.
I'm not an expert on FreeBSD, well I'm not even an advanced user, so
perhaps I didn't get the right version of FreeBSD for my testing purposes.
This is the version I have used:
$ uname -a
FreeBSD freebsd.fibranet.lan 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May
1 08:49:13 UTC 2009
r...@walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
Please, let me know which you think would be the right steps to fix this
situation.
Many thanks.
Best regards.
strumm...@thestrings.com wrote:
Hello,
First, thank you for creating monitorix. I've used to it monitor several
CentOS servers I administered for a few years and it has proved to be
very useful.
I have no idea if I this is the right way to report a bug so my
apologies if this is the wrong way to go about doing it.
I also happen to administer some FreeBSD systems. I recently found what
I think is a bug in the code for collecting network statistics under
FreeBSD. I noticed that the main graph in the Network Traffic and Usage
graph section is always blank. No traffic is ever logged. However, the
traffic error section always logs data as if my network interface is
continually generating packet errors.
I believe I have found the cause of the problem and enclose a patch for it.
I think some of the columns from netstat -nibd are being logged in the
wrong order -
open(IN, netstat -nibd |);
while(IN) {
if(/Link/ /$NET_LIST[$n]/) {
(undef, undef, undef, undef, $net_packs_in[$n],
$net_error_in[$n], $net_bytes_in[$n], $net_packs_out[$n],
$net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
}
}
compare this with the actual output of a netstat -nibd command :
NameMtu Network Address Ipkts Ierrs Idrop
IbytesOpkts Oerrs Obytes Coll Drop
ipfw0 65536 Link#1 0 0 0
00 0 0 00
lo0 16384 Link#2 0 0 0
00 0 0 00
lo0 16384 fe80:2::1/64 fe80:2::10 - -
00 - 0 --
lo0 16384 ::1/128 ::1 0 - -
00 - 0 --
lo0 16384 127.0.0.0/8 127.0.0.10 - -
00 - 0 --
em01500 Link#3 08:00:27:09:3e:7c30976 0 0
4368417221128 01183551 00
em01500 192.168.10.0/24 192.168.10.15 30970 - -
4324873121126 - 887703 --
$net_packs_in[$n] = Ipkts (correct)
$net_packs_error_in[$n] = Ierrs (correct)
$net_bytes_in[$n] = Idrop (should be Ibytes, next column)
$net_packs_out[$n] = Ibytes (should be Opkts, next column)
etc
The solution is to add one more undef after $net_error_in[$n] thus :
if(/Link/ /$NET_LIST[$n]/) {
(undef, undef, undef, undef, $net_packs_in[$n],
$net_error_in[$n], undef, $net_bytes_in[$n], $net_packs_out[$n],
$net_error_out[$n], $net_bytes_out[$n]) = split(' ', $_);
}
I first noticed this on version 1.5.1 (FreeBSD ports) and it still
appears to be there in v. 2.0.0 and 2.1.0 (source), which I am now running.
Best regards,
Sean
--
Jordi Sanfeliu
FIBRANET Network Services Provider
http://www.fibranet.cat
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A question and answer guide to determining the best fit
for your organization - today and in the future.
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