Difference between revisions of "Monitoring openvz resources using rrdtool"

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(New page: Category: Monitoring In this setup there is a central rrd server that collects data from several openvz hardware nodes === Setting up rrd server === Create a directory /var/rrd on c...)
 
Line 9: Line 9:
 
  mkdir /var/rrd
 
  mkdir /var/rrd
  
In /etc/xinetd.d create a file rrdsrv
+
In /etc/xinetd.d create a file rrdsrv and adjust addresses and paths according to local settings.
  
 
  service rrdsrv
 
  service rrdsrv
Line 28: Line 28:
  
 
=== Collect script ===
 
=== Collect script ===
 +
 +
Put the following script on the openvz hardware nodes:
 +
 +
#!/bin/sh
 +
 +
PATH="/bin:/sbin:/usr/bin:/usr/sbin"
 +
SENDCOMMAND='netcat 192.168.2.1 13900'
 +
HEARTBEAT=600
 +
 +
function error {
 +
        echo $1
 +
        exit 1
 +
}
 +
 +
test -r /proc/bc/0/resources || error "Not openvz kernel?"
 +
 +
command='cat'
 +
init=0
 +
update=0
 +
send=0
 +
 +
while [ ! -z "$1" ]; do
 +
        case "$1" in
 +
                send)
 +
                        send=1
 +
                        command=$SENDCOMMAND
 +
                        ;;
 +
                init)
 +
                        init=1
 +
                        ;;
 +
                update)
 +
                        update=1
 +
                        ;;
 +
        esac
 +
        shift
 +
done
 +
 +
VPSIDS=$(vzlist | awk ' BEGIN { ORS=" "; getline } { print $1 }')
 +
 +
PARAMS=$(cat /proc/bc/0/resources | awk '{ print $1 }'| sort -u | xargs)
 +
if [ "$send" -eq 1 ]; then
 +
        # to spread the load we sleep for a random while (between 0 and 60 sec)
 +
        number=$RANDOM
 +
        let "number %= 60"
 +
        sleep $number
 +
fi
 +
 +
for VPSID in $VPSIDS; do
 +
        RRDFILENAME="ubc_${VPSID}.rrd"
 +
 +
        if [ "$init" -eq 1 ]; then
 +
                exists=0
 +
                if [ "$send" -eq 1 ]; then
 +
                        echo "info $RRDFILENAME" | $command | grep -q "No such file or directory" || exists=1
 +
                fi     
 +
               
 +
                if [ "$exists" -eq 0 ]; then
 +
                (
 +
                        echo -n "create ${RRDFILENAME} "
 +
                        for param in $PARAMS; do
 +
                                echo -n "DS:${param}_f:DERIVE:$HEARTBEAT:0:U "
 +
                                echo -n "DS:${param}_h:GAUGE:$HEARTBEAT:0:U "
 +
                                echo -n "DS:${param}_b:GAUGE:$HEARTBEAT:0:U "
 +
                        done
 +
                        echo -n "RRA:AVERAGE:0.5:1:600 "
 +
                        echo -n "RRA:AVERAGE:0.5:6:700 "
 +
                        echo -n "RRA:AVERAGE:0.5:24:775 "
 +
                        echo -n "RRA:AVERAGE:0.5:288:797 "
 +
                        echo -n "RRA:MAX:0.5:1:600 "
 +
                        echo -n "RRA:MAX:0.5:6:700 "
 +
                        echo -n "RRA:MAX:0.5:24:775 "
 +
                        echo "RRA:MAX:0.5:288:797"
 +
                ) | $command
 +
                fi
 +
        fi

Revision as of 15:01, 8 July 2008


In this setup there is a central rrd server that collects data from several openvz hardware nodes

Setting up rrd server

Create a directory /var/rrd on central server.

mkdir /var/rrd

In /etc/xinetd.d create a file rrdsrv and adjust addresses and paths according to local settings.

service rrdsrv
{
  disable         = no
  socket_type     = stream
  protocol        = tcp
  wait            = no
  user            = root
  only_from       = 192.168.2.0/24
  server          = /usr/bin/rrdtool
  server_args     = - /var/rrd
}

Add service in /etc/services

rrdsrv                13900/tcp


Collect script

Put the following script on the openvz hardware nodes:

#!/bin/sh

PATH="/bin:/sbin:/usr/bin:/usr/sbin"
SENDCOMMAND='netcat 192.168.2.1 13900'
HEARTBEAT=600

function error {
        echo $1
        exit 1
}

test -r /proc/bc/0/resources || error "Not openvz kernel?"

command='cat'
init=0
update=0
send=0

while [ ! -z "$1" ]; do
        case "$1" in
                send)
                        send=1
                        command=$SENDCOMMAND
                        ;;
                init)
                        init=1
                        ;;
                update)
                        update=1
                        ;;
        esac
        shift
done

VPSIDS=$(vzlist | awk ' BEGIN { ORS=" "; getline } { print $1 }')

PARAMS=$(cat /proc/bc/0/resources | awk '{ print $1 }'| sort -u | xargs)
if [ "$send" -eq 1 ]; then
        # to spread the load we sleep for a random while (between 0 and 60 sec)
        number=$RANDOM
        let "number %= 60"
        sleep $number
fi

for VPSID in $VPSIDS; do
       RRDFILENAME="ubc_${VPSID}.rrd" 

        if [ "$init" -eq 1 ]; then
                exists=0
                if [ "$send" -eq 1 ]; then
                        echo "info $RRDFILENAME" | $command | grep -q "No such file or directory" || exists=1
                fi      
                
                if [ "$exists" -eq 0 ]; then
                (
                        echo -n "create ${RRDFILENAME} "
                        for param in $PARAMS; do
                                echo -n "DS:${param}_f:DERIVE:$HEARTBEAT:0:U "
                                echo -n "DS:${param}_h:GAUGE:$HEARTBEAT:0:U "
                                echo -n "DS:${param}_b:GAUGE:$HEARTBEAT:0:U "
                        done
                        echo -n "RRA:AVERAGE:0.5:1:600 "
                        echo -n "RRA:AVERAGE:0.5:6:700 "
                        echo -n "RRA:AVERAGE:0.5:24:775 "
                        echo -n "RRA:AVERAGE:0.5:288:797 "
                        echo -n "RRA:MAX:0.5:1:600 "
                        echo -n "RRA:MAX:0.5:6:700 "
                        echo -n "RRA:MAX:0.5:24:775 "
                        echo "RRA:MAX:0.5:288:797"
                ) | $command
                fi
        fi