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Date: Mon, 26 Mar 2001 22:48:42 -0600
From: Dan Nelson <dnelson@emsphone.com>
To: dannyman <dannyman@toldme.com>
Cc: freebsd-questions@FreeBSD.ORG
Subject: pretty system monitoring graphs
Message-ID: <20010326224842.A17294@dan.emsphone.com>
References: <20010326203255.I45348@dell.dannyland.org>
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In the last episode (Mar 26), dannyman said:
> So, I have diddled with Perl, MRTG, RRDTool, Cricket, Orca ...
> 
> I have rolled my own "FreeBSD System Stats" using Orca and some scripts that
> snarf data out of a Perl script that gets called from inetd.
> 
> But, as I re-build a shell system, I can't help but wonder that somebody has
> already rolled up a better system than mine, possibly using SNMP?  'twould be
> nice to install it in the new shell cluster I build ...
> 
> Anyone?  Anyone?  Suggestions?  Beuller?

Depends on the stats you're looking for.  I'm graphing traffic, CPU,
and disk usage with mrtg and ucd-snmp right now; attached are my
get-cpu and get-space scripts; use them like 

Target[a_cpu]: `/usr/local/bin/get-cpu a.host.com`
Target[a_usr]: `/usr/local/bin/get-space a.host.com /usr`

get-space should work on any Unix running just about any snmpd, and
graphs used space in green and total in blue.

get-cpu is tested to work on FreeBSD, Solaris, and Tru64 (the latter
two using their native snmpds), and doesn't seem to work right on
Linux, no matter how I try :)  It graphs total CPU in green and system
cpu in blue.

Examples at http://www.emsphone.com/stats/e5cpu.html and
http://www.emsphone.com/stats/e5io1.html

-- 
	Dan Nelson
	dnelson@emsphone.com

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#! /usr/local/bin/zsh
case $2 in 
	tru64v4)
		# Have to total per-cpu stats together
		GET=(snmpget -m PMGRD-2-0 -Oqv $1 public)
		WALK=(snmpwalk -m PMGRD-2-0 -Oqv $1 public)
		cpus=$($GET pmCmSysNumCpusOnline.0)
		userA=($($WALK pmAoCuUser))
		niceA=($($WALK pmAoCuNice))
		systemA=($($WALK pmAoCuSystem))
		cpu=0
		while (( cpu < cpus )) ; do
			(( total += userA[cpu] + niceA[cpu] + systemA[cpu] ))
			(( system += systemA[cpu] ))
			(( cpu++ ))
		done
		uptime=$(snmpget -Ov $1 public hrSystemUptime.0)
	;;
	solaris)
		results=$(snmpget -m sun-snmp -Oqv $1 public rsIdleModeTime.0 rsUserProcessTime.0 rsNiceModeTime.0 rsSystemProcessTime.0 sysUpTime.0)
		results=(${(f)results})
		total=$(( results[2]+results[3]+results[4] ))
		system=$results[4]
		uptime=${results[6]-$results[5]}
	;;
	linux )
		# regular CPU stats are broken; get raw ones
		results=$(snmpget -Oqv $1 public ssCpuRawIdle.0 ssCpuRawSystem.0 ssCpuRawUser.0 sysUpTime.0 hrSystemUptime.0 2>/dev/null)
		results=(${(f)results})
		total=$(( results[2]+results[3] ))
		system=$results[2]
		uptime=${results[5]-$results[4]}
	;;
	* )
		results=$(snmpget -Ov $1 public ssCpuIdle.0 ssCpuSystem.0 ssCpuUser.0 sysUpTime.0 hrSystemUptime.0 2>/dev/null)
		results=(${(f)results})
		total=$(( results[2]+results[3] ))
		system=$results[2]
		uptime=${results[5]-$results[4]}
	;;
esac
# uptime=$(snmpget -Ov $1 public hrSystemUptime.0)
echo $total 
echo $system 
echo $uptime
echo $1

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#! /usr/local/bin/zsh 
results=$(snmptable -Cf : $1 public hrStorageTable | grep :$2:)
results=(${(s.:.)results})
(( results[5] == 0 )) && exit 1
scale=${results[4]% *}
(( scale == 0 )) && scale=4096
echo $(( results[6] / 1024 * scale ))
echo $(( results[5] / 1024 * scale ))
echo
echo $1

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