[SOLVED] Graphs for Linux/Unix disks

[MatsB]

What is the best templete or plugin to use if I wan't to graph the disk usage on a remote Linux and Unix server?

[fmangeant]

Hi

the best way IMHO is to set up Net-SNMP on your Unix boxes, and then use the "ucd/net SNMP" host template in Cacti.

[gandalf]

Well, I slightly disagree with frederic (which I do very seldom). I'd like to advertise my pure SNMP solution posted to http://docs.cacti.net/node/227. Find the resources attached to the last chapter of that sequence.
It does exactly what the standard disk templates do, but is faster because it's SNMP only.
Be aware of the fact, that the HOST MIB support for DISK required for this is not available on all operating systems.
Reinhard

[MatsB]

Thanks for the tip.

I've tried created a new host templete and added ucd/net - Available Disk Space as Associated Graph Templates but I don't get any graphs.

Debug output:

RRDTool Command:

/usr/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="MP - Hard Drive Space" \
--rigid \
--base=1024 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="bytes" \
--slope-mode \
DEF:a="/var/www/rra/mp_hdd_free_4778.rrd":hdd_used:AVERAGE \
DEF:b="/var/www/rra/mp_hdd_free_4778.rrd":hdd_free:AVERAGE \
CDEF:cdefa=a,1024,* \
CDEF:cdefe=b,1024,* \
CDEF:cdefi=TIME,1202297594,GT,a,a,UN,0,a,IF,IF,TIME,1202297594,GT,b,b,UN,0,b,IF,IF,+,1024,* \
AREA:cdefa#F51D30:"Used" \
GPRINT:cdefa:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefa:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefa:MAX:"Maximum\:%8.2lf %s\n" \
AREA:cdefe#002A97:"Available":STACK \
GPRINT:cdefe:LAST:"Current\:%8.2lf %s" \
GPRINT:cdefe:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefe:MAX:"Maximum\:%8.2lf %s\n" \
LINE2:cdefi#000000:"Total" \
GPRINT:cdefi:LAST:" Current\:%8.2lf %s" \
GPRINT:cdefi:AVERAGE:"Average\:%8.2lf %s" \
GPRINT:cdefi:MAX:"Maximum\:%8.2lf %s"

RRDTool Says:

ERROR: opening '/var/www/rra/mp_hdd_free_4778.rrd': No such file or directory


These are the rrd files that was created in /var/www/rra:
-rw-r--r-- 1 www-data www-data 188744 2008-02-06 08:55 mp_hdd_free_4568.rrd
-rw-r--r-- 1 www-data www-data 188744 2008-02-06 12:35 mp_hdd_free_4794.rrd
-rw-r--r-- 1 www-data www-data 188744 2008-02-06 12:35 mp_hdd_total_4790.rrd
-rw-r--r-- 1 www-data www-data 188744 2008-02-06 12:35 mp_hdd_total_4791.rrd
-rw-r--r-- 1 www-data www-data 188744 2008-02-06 12:35 mp_hdd_total_4792.rrd

It's clear that there are a missmatch for these rrd files but why?

[fmangeant]

If you're using the "ucd/net - Get Monitored Partitions" data query, can you try that :

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$ snmpwalk -v 1 -c yourcommunity xx.xx.xx.xx dskpath

[MatsB]

Polling my Linux server:

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admin@cacti:~$ snmpwalk -v 1 -c public 192.168.0.1 dskpath
UCD-SNMP-MIB::dskPath.1 = STRING: / 

Polling my Unix server

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admin@cacti:~$ snmpwalk -v 1 -c public 192.168.0.2 dskpath
End of MIB 

[fmangeant]

What SNMP agent are you running on the second host ?

[MatsB]

I think we are running net-snmp 5.1.1 on our SUN Solaris server.

Does this answer your question?

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bash-3.00$ ps -ef | grep snmp
    root  1857     1   0   Aug 28 ?           0:11 /usr/lib/snmp/snmpdx -y -c /etc/snmp/conf
    root  1881     1   0   Aug 28 ?           0:00 /usr/lib/dmi/snmpXdmid -s 
    root 29937     1   0   Oct 03 ?          40:23 /usr/sfw/sbin/snmpd

[fmangeant]

Can you run that :

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$ snmpwalk -v 1 -c yourcommunity xx.xx.xx.xx versiontag

[MatsB]

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admin@cacti:~$ snmpwalk -v 1 -c public 192.168.0.2 versiontag
UCD-SNMP-MIB::versionTag.0 = STRING: 5.1.1

[fmangeant]

Did you add entries like that in snmpd.conf :

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disk /
disk /usr

[MatsB]

I have this in my snmpd.conf file

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disk /

[fmangeant]

On 192.168.0.2 ?

[MatsB]

Sorry about that.

Code: Select all

disk /

was set on 192.168.0.1

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disk /

is not set on 192.168.0.2. I will try that.

[fmangeant]

You can also use "includeAllDisks" (see the HowTo in my signature).