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| | [[Category: Monitoring]] | | [[Category: Monitoring]] |
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| − | In this setup we're using [http://oss.oetiker.ch/rrdtool/ rrdtool] to collect data from several openvz hardware nodes to a central [http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html#IRRD_Server rrd server]. | + | In this setup there is a central rrd server that collects data from several openvz hardware nodes |
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| | === Setting up rrd server === | | === Setting up rrd server === |
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| | mkdir /var/rrd | | mkdir /var/rrd |
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| − | In /etc/xinetd.d create a file rrdsrv and adjust addresses and paths according to local settings. | + | In /etc/xinetd.d create a file rrdsrv |
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| | service rrdsrv | | service rrdsrv |
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| | } | | } |
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| − | Add 'rrdsrv' to /etc/services | + | Add service in /etc/services |
| | rrdsrv 13900/tcp | | rrdsrv 13900/tcp |
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| | === Collect script === | | === Collect script === |
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| − | Put the following script on the openvz hardware nodes (ubc_rrd_collect.sh):
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| − | #!/bin/sh
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| − |
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| − | PATH="/bin:/sbin:/usr/bin:/usr/sbin"
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| − | SENDCOMMAND='netcat 192.168.2.1 13900'
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| − | HEARTBEAT=600
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| − |
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| − | function error {
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| − | echo $1
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| − | exit 1
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| − | }
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| − |
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| − | test -r /proc/bc/0/resources || error "Not openvz kernel?"
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| − |
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| − | command='cat'
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| − | init=0
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| − | update=0
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| − | send=0
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| − |
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| − | while [ ! -z "$1" ]; do
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| − | case "$1" in
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| − | send)
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| − | send=1
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| − | command=$SENDCOMMAND
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| − | ;;
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| − | init)
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| − | init=1
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| − | ;;
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| − | update)
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| − | update=1
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| − | ;;
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| − | esac
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| − | shift
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| − | done
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| − |
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| − | VPSIDS=$(vzlist -H -o veid)
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| − |
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| − | PARAMS=$(cat /proc/bc/0/resources | awk '{ print $1 }'| sort -u | xargs)
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| − | if [ "$send" -eq 1 ]; then
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| − | # to spread the load we sleep for a random while (between 0 and 60 sec)
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| − | number=$RANDOM
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| − | let "number %= 60"
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| − | sleep $number
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| − | fi
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| − |
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| − | for VPSID in $VPSIDS; do
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| − | RRDFILENAME="ubc_${VPSID}.rrd"
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| − |
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| − | if [ "$init" -eq 1 ]; then
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| − | exists=0
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| − | if [ "$send" -eq 1 ]; then
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| − | echo "info $RRDFILENAME" | $command | grep -q "No such file or directory" || exists=1
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| − | fi
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| − | if [ "$exists" -eq 0 ]; then
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| − | (
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| − | echo -n "create ${RRDFILENAME} "
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| − | for param in $PARAMS; do
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| − | echo -n "DS:${param}_f:DERIVE:$HEARTBEAT:0:U "
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| − | echo -n "DS:${param}_h:GAUGE:$HEARTBEAT:0:U "
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| − | echo -n "DS:${param}_b:GAUGE:$HEARTBEAT:0:U "
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| − | done
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| − | echo -n "RRA:AVERAGE:0.5:1:600 "
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| − | echo -n "RRA:AVERAGE:0.5:6:700 "
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| − | echo -n "RRA:AVERAGE:0.5:24:775 "
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| − | echo -n "RRA:AVERAGE:0.5:288:797 "
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| − | echo -n "RRA:MAX:0.5:1:600 "
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| − | echo -n "RRA:MAX:0.5:6:700 "
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| − | echo -n "RRA:MAX:0.5:24:775 "
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| − | echo "RRA:MAX:0.5:288:797"
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| − | ) | $command
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| − | fi
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| − | fi
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| − |
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| − | if [ "$update" -eq 1 ]; then
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| − | (
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| − | cat /proc/bc/$VPSID/resources | awk -v rrdfile=$RRDFILENAME '
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| − | BEGIN {
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| − | ORS="";
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| − | getline
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| − | keys=$1 "_f"; values=$6;
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| − | keys=keys ":" $1 "_h"; values=values ":" $2;
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| − | keys=keys ":" $1 "_b"; values=values ":" $4;
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| − | }
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| − | {
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| − | keys=keys ":" $1 "_f"; values=values ":" $6;
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| − | keys=keys ":" $1 "_h"; values=values ":" $2;
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| − | keys=keys ":" $1 "_b"; values=values ":" $4;
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| − | }
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| − | END { print "update " rrdfile " -t " keys " N:" values "\n"; } '
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| − | ) | $command
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| − | fi
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| − | done
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| − |
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| − | === Usage ===
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| − |
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| − | ubc_rrd_collect.sh [update] [init] [send]
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| − |
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| − | update - run this to update rrd files
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| − | init - scan system and create rrd files
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| − | send - use this to send commands to rddtool
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| − |
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| − | === Migration and new container ===
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| − |
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| − | When you have this script running in cron on every hardware node and you're migrating a container from one node to the other the script will automatically detect this and pick it up on the other node.
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| − |
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| − | When you create a new container you have to run <code>ubc_rrd_collect.sh init send</code> and it will ping rddtool to create a new rrd database. It won't overwrite existing databases because it first checks if a database already exists.
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| − |
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| − | === Setting up cron ===
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| − |
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| − | Run update every 5 minutes:
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| − |
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| − | */5 * * * * /path/to/ubc_rrd_collect.sh update send | grep -v '^OK'
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| − |
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| − | Run init every hour (or run it manually when needed):
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| − | 0 * * * * /path/to/ubc_rrd_collect.sh init send | grep -v '^OK'
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