[munin-users] SNMP Custom charts

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Hi All,
I'm sure I'm just missing something obvious or getting the syntax slightly wrong, but I'm blind to it now! Can anyone offer some help to create custom charts from data collected from SNMP plugins?

What I'm trying to do is get a quick picture of CPU usage of a few servers. Simple with Linux servers, as shown below. However when I try using data from SNMP for Windows boxes I haven't managed to get any custom charts to be drawn. Just to clarify, each server does show the default charts correctly so SNMP data collection is working. It's just sums and any other custom charts that I'm struggling with.

I think the critical line might be this (pulled out from below):
        wincpu.W1.sum \
                W1.domain.tld:snmp_W1_domain_tld_cpuload.cpu3 \
                W1.domain.tld:snmp_W1_domain_tld_cpuload.cpu4
Note, cpu3 and cpu4 are the `internal names` given for the W1's individual CPU usage chart. Though I've also tried 'cpu', 'cpu1', and 'cpu2' with no success.

So, can anyone identify the cause of the problem I'm having? I suspect it's just syntax of the above line, but it might be that I'm completely off track!

I've pasted some relevant info below - extract from munin.conf, list of SNMP plugins in /etc/munin/plugins, munin-graph.log file and some system info. If there's anything else that might help, please let me know!

Many thanks for reading and for any help you can offer

Rob

File: /etc/munin.conf

###Windows
[W1.domain.tld]
    address 127.0.0.1
[W2.domain.tld]
    address 127.0.0.1

###Linux servers:
[L1.domain.tld]
    address 1.2.3.1
    use_node_name yes
[L2.domain.tld]
    address 1.2.3.2
    use_node_name yes

[domain.tld;Totals]
        update no

###Windows summary chart
        wincpu.graph_title Windows server CPU% Summary
        wincpu.W1.label Win 1
        wincpu.W1.sum \
                W1.domain.tld:snmp_W1_domain_tld_cpuload.cpu3 \
                W1.domain.tld:snmp_W1_domain_tld_cpuload.cpu4

###Linux summary chart
        linuxcpu.graph_title Linux server CPU% Summary
        linuxcpu.L1.label Linux 1
        linuxcpu.L1.sum L1.domain.tld:cpu.user L1.domain.tld:cpu.system
        linuxcpu.L2.label Linux 2
        linuxcpu.L2.sum L2.domain.tld:cpu.user L2.domain.tld:cpu.system

SNMP Plugins in /etc/munin/plugins:

W1.domain.tld_cpuload -> /usr/share/munin/plugins/snmp__cpuload
W1.domain.tld_df -> /usr/share/munin/plugins/snmp__df
W1.domain.tld_if_2 -> /usr/share/munin/plugins/snmp__if_
W1.domain.tld_if_err_2 -> /usr/share/munin/plugins/snmp__if_err_
W1.domain.tld_memory -> /usr/share/munin/plugins/snmp__memory
W1.domain.tld_netapp_diskusage_ -> /usr/share/munin/plugins/snmp__netapp_diskusage_
W1.domain.tld_processes -> /usr/share/munin/plugins/snmp__processes
W1.domain.tld_uptime -> /usr/share/munin/plugins/snmp__uptime
W1.domain.tld_users -> /usr/share/munin/plugins/snmp__users
W2.domain.tld_cpuload -> /usr/share/munin/plugins/snmp__cpuload
W2.domain.tld_df -> /usr/share/munin/plugins/snmp__df
W2.domain.tld_if_2 -> /usr/share/munin/plugins/snmp__if_
W2.domain.tld_if_err_2 -> /usr/share/munin/plugins/snmp__if_err_
W2.domain.tld_memory -> /usr/share/munin/plugins/snmp__memory
W2.domain.tld_netapp_diskusage_ -> /usr/share/munin/plugins/snmp__netapp_diskusage_
W2.domain.tld_processes -> /usr/share/munin/plugins/snmp__processes
W2.domain.tld_uptime -> /usr/share/munin/plugins/snmp__uptime
W2.domain.tld_users -> /usr/share/munin/plugins/snmp__users

file: /var/log/munin/munin-graph.log

2011/04/27 15:50:48 [PERL WARNING] print() on closed filehandle $STATS at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 1290.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in subroutine entry at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 757.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 774.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 783.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 785.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 786.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in subroutine entry at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 757.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 774.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 783.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 785.
2011/04/27 15:50:48 [PERL WARNING] Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/vendor_perl/5.8.8/Munin/Master/GraphOld.pm line 786.
2011/04/27 15:50:48 [RRD ERROR] Unable to graph /var/www/html/munin/hrw-uk.local/Totals/wincpu-month.png : opening '': No such file or directory
2011/04/27 15:50:48 [RRD ERROR] Unable to graph /var/www/html/munin/hrw-uk.local/Totals/wincpu-week.png : opening '': No such file or directory
2011/04/27 15:50:48 [RRD ERROR] Unable to graph /var/www/html/munin/hrw-uk.local/Totals/wincpu-day.png : opening '': No such file or directory
2011/04/27 15:50:48 [RRD ERROR] Unable to graph /var/www/html/munin/hrw-uk.local/Totals/wincpu-year.png : opening '': No such file or directory
2011/04/27 15:50:48 Graphed service : wincpu (0.02 sec * 4)

System info:

x86_64 / CentOS 55 ( 2.6.18-194.26.1.el5 )
Munin / munin-node version 1.4.5-5.el5

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