Initial version

plugins/other/vserver_loadavg

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+#!/bin/sh
+#
+# Copyright (C) 2007 Andrei Morgan
+# Copyright (C) 2008 Micah Anderson
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; version 2 dated June,
+# 1991.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+# Graph Vserver load average
+# 
+# Configuration variables
+#   vservers - specify the vservers to include in the graph (default: all)
+#
+# NOTE: If no configuration variables are set, the defaults will be used
+
+# Example  /etc/munin/plugin-conf.d/munin-node 
+#
+# The following monitors the load average for vservers 1 and 3:
+#
+# [vserver_loadavg]
+# user root
+# env.vservers vserver1 vserver3
+
+# Changelog
+# version 0.1 - 2007 June 26
+# Andrei Morgan <asm-debian@fifthhorseman.net>
+#  - initial author, based upon vserver_resources by Holger Levsen and
+#    Micah Anderson, and upon the examples in the munin wiki.
+# version 0.2 - 2008 July 7
+# Micah Anderson <micah@riseup.net>
+#  - fix cvirt vs. nsproxy issue with newer kernels by adding $NAMELOC which
+#    is aware of VCI_SPACES (> 2.6.19) as well as the older version
+
+# If run with the "autoconf"-parameter, give our opinion on whether we
+# should be run on this system or not. This is optional, and only used by
+# munin-config. In the case of this plugin, we should most probably
+# always be included whwn there is a vserver kernel.
+
+if [ "$1" = "autoconf" ]; then
+        echo yes
+        exit 0
+fi
+
+
+# if vservers are specified, use them; the default is to use all.
+VSERVERS="$vservers"
+
+INFO=(`sed 's/.*:\t//' /proc/virtual/info 2>/dev/null || echo '<none>'`)
+KCIN="$[ 16#${INFO[2]} ]";
+
+# If this is 1, then VCI_SPACES is present in the kernel (new in 2.6.19)
+if [ $[ (KCIN >> 10) & 1 ] -eq 1 ]
+then 
+    NAMELOC="nsproxy"
+else 
+    NAMELOC="cvirt"
+fi
+
+if [ -z "$VSERVERS" ] ; then
+    XIDS=`find /proc/virtual/* -type d -exec basename {} \;`
+else
+    # it's really more performant to specify vservers by ids or not at all
+    XIDS=""
+    for i in $VSERVERS ; do
+	if [ -d /proc/virtual/$i ] ; then
+	    XIDS="${XIDS}${i} "
+	else
+	    for j in `find /proc/virtual/* -type d -exec basename {} \;` ; do
+		if [ "$i" = "`cat /proc/virtual/$j/$NAMELOC |grep NodeName |cut -f2`" ] ; then
+		    XIDS="${XIDS}${j} "
+		fi
+	    done
+	fi
+    done
+fi
+	
+# If run with the "config"-parameter, give out information on how the
+# graphs should look.  
+if [ "$1" = "config" ]; then
+        # The title of the graph
+	echo 'graph_title loadavg of vserver'
+        # Arguments to "rrdtool graph". In this case, tell it that the
+        # lower limit of the graph is '0', and that 1k=1000 (not 1024)
+	echo 'graph_args --base 1000 -l 0'
+        # We want Cur/Min/Avg/Max unscaled (i.e. 0.42 load instead of
+        # 420 milliload)
+	echo 'graph_scale no'
+        # The Y-axis label
+	echo 'graph_vlabel loadavg'
+	# graph information for the main table
+	echo 'graph_info Shows 5-minute load average per vserver.'
+        # Graph category. Defaults to 'other'
+	echo 'graph_category vserver'
+	for xid in $XIDS ; do
+	# Specify the vservers
+		LABEL=`cat /proc/virtual/$xid/$NAMELOC |grep NodeName |cut -f2`
+		NAME=`echo $LABEL | cut -d. -f1 |  tr '-' '_'`
+		echo "$NAME.label $LABEL: load average"
+		echo "$NAME.info $NAME average load for the past 5 minutes"
+	done 
+        # Last, if run with the "config"-parameter, quit here (don't
+        # display any data)
+        exit 0
+fi
+
+for xid in $XIDS ; do
+	LABEL=`cat /proc/virtual/$xid/$NAMELOC |grep NodeName |cut -f2`
+	NAME=`echo $LABEL | cut -d. -f1 |  tr '-' '_'`
+	echo -n "$NAME.value ";
+	cat /proc/virtual/$xid/cvirt | grep loadavg: | cut -d' ' -f2	
+done
+