Cacti "loosing" data on virtual hosts

[SoftDux]

Hi,

I have a XEN server with 4 XEN VPS's, and have set each VPS's network interface name as vifandr0, vifplut0, vifwise0 & vifkeith0

For some odd reason, it tends to loose on of the interfaces data from time to time.

The one that's just done this is vifwise0 - On the main host, when I run ifconfig, I can see the interface is up:

Code: Select all

vifwise0  Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:102771 errors:0 dropped:0 overruns:0 frame:0
          TX packets:581620 errors:0 dropped:156 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:29892687 (28.5 MiB)  TX bytes:65585542 (62.5 MiB)

Then, in Cacti > Devices > localhost > Create Graphs for this Host, I can sometimes see at least 9 entries for vifwise0 (or any other interfaces), with one being up, and the others being down. When I press the green circle to fresh the list, the number of entries are often less, but there's at least 2 that are down, and one that's up. The strange things, is that they all have the same Hardware Address, Name & everything. So, I choose the one that's up, and it start graphing on the new interface, but the old interface doesn't.

So, for this host, I now have 2 inbound & 2 outbound data sources - both with the same name, as can be seen here:



So, why does this happen?

[TheWitness]

Verbose Query Please. Likely an SNMP issue with XEN. Check for Net-SNMP updates. But start with Verbose Query.

TheWitness

[SoftDux]

Here's the debug info:

Code: Select all

RRDTool Command:
/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="Traffic - wiseguy" \
--rigid \
--base=1000 \
--height=150 \
--width=650 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bytes per second" \
--slope-mode \
--font TITLE:10: \
--font AXIS:8: \
--font LEGEND:8: \
--font UNIT:8: \
DEF:a="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_in:AVERAGE \
DEF:b="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_in:MAX \
DEF:c="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_out:AVERAGE \
DEF:d="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_out:MAX \
AREA:a#00CF00FF:"Inbound"  \
GPRINT:a:LAST:" Current\:%8.2lf %s"  \
GPRINT:a:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:b:MAX:"Maximum\:%8.2lf %s"  \
COMMENT:"Total In\:  7.86 MB\n"  \
LINE1:c#002A97FF:"Outbound"  \
GPRINT:c:LAST:"Current\:%8.2lf %s"  \
GPRINT:c:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:d:MAX:"Maximum\:%8.2lf %s"  \
COMMENT:"Total Out\: 15.41 MB" 
RRDTool Says:
OK

And it's stoppped graphing the traffic as well


Here's the debugging info for the other / old interface

Code: Select all

RRDTool Command:
/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="Saturn - Traffic - vifwise0" \
--rigid \
--base=1000 \
--height=150 \
--width=650 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bytes per second" \
--slope-mode \
--font TITLE:10: \
--font AXIS:8: \
--font LEGEND:8: \
--font UNIT:8: \
DEF:a="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_in:AVERAGE \
DEF:b="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_in:MAX \
DEF:c="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_out:AVERAGE \
DEF:d="/var/www/html/graphs/rra/saturn_traffic_in_58.rrd":traffic_out:MAX \
AREA:a#00CF00FF:"Inbound"  \
GPRINT:a:LAST:" Current\:%8.2lf %s"  \
GPRINT:a:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:b:MAX:"Maximum\:%8.2lf %s"  \
COMMENT:"Total In\:  7.86 MB\n"  \
LINE1:c#002A97FF:"Outbound"  \
GPRINT:c:LAST:"Current\:%8.2lf %s"  \
GPRINT:c:AVERAGE:"Average\:%8.2lf %s"  \
GPRINT:d:MAX:"Maximum\:%8.2lf %s"  \
COMMENT:"Total Out\: 15.41 MB" 
RRDTool Says:
OK

[SoftDux]

Can someone please help me with this?