• # Du coup je poste mon bousin

    Posté par . En réponse au message Plomberie unixienne. Évalué à 6. 

    #!/usr/bin/env bash
PERIOD=1
RRD_TPL='vmstat_rrd'
RRD_DB='vmstat.rrd'
test -f "${RRD_DB}" || rrdtool create "${RRD_DB}" --start $(date +%s) -s ${PERIOD} $(tr '\n' ' ' < "${RRD_TPL}")
vmstat -n ${PERIOD} \
 | awk '{ if (NR>3) { printf "%s", strftime("%s"); for (i=1; i<18; i++) { printf ":%i", $i; } print "000円"; fflush(); } }' \
 | xargs -0 -n 1 rrdupdate ${RRD_DB} &

    Le fichier vmstat_rrd contient la définition de la base RRD :

    DS:r:GAUGE:60:0:32768
DS:b:GAUGE:60:0:32768
DS:swapd:GAUGE:60:0:1073741824
DS:free:GAUGE:60:0:1073741824
DS:buff:GAUGE:60:0:1073741824
DS:cache:GAUGE:60:0:1073741824
DS:si:GAUGE:60:0:1073741824
DS:so:GAUGE:60:0:1073741824
DS:bi:GAUGE:60:0:1073741824
DS:bo:GAUGE:60:0:1073741824
DS:in:GAUGE:60:0:1073741824
DS:cs:GAUGE:60:0:1073741824
DS:us:GAUGE:60:0:100
DS:sy:GAUGE:60:0:100
DS:id:GAUGE:60:0:100
DS:wa:GAUGE:60:0:100
DS:st:GAUGE:60:0:100
RRA:AVERAGE:0.5:1:60
RRA:AVERAGE:0.5:1m:60
RRA:AVERAGE:0.5:1h:24
RRA:AVERAGE:0.5:24h:7
RRA:AVERAGE:0.5:7d:520

    La base se remplit au fur et à mesure (toute les secondes).

    On peut facilement faire un graphique, défini dans un fichier vmstat_rrdgraph :

    DEF:id=vmstat.rrd:id:AVERAGE
DEF:us=vmstat.rrd:us:AVERAGE
DEF:sy=vmstat.rrd:sy:AVERAGE
DEF:wa=vmstat.rrd:wa:AVERAGE
DEF:st=vmstat.rrd:st:AVERAGE
CDEF:usage=100,id,-
LINE1:usage#0000FF:Total
LINE2:us#DD0044:User
LINE3:sy#DD4400:System
LINE4:wa#00DE40:Wait
LINE5:st#40DE00:Stolen

    Pour grapher la dernière heure :

    $ rrdtool graph vmstat.png -w800 -h600 -t "CPU Usage" --start end-1h --end now $(tr '\n' ' ' < vmstat_rrdgraph)

    Exemple