Controlar la carga de un sistema Unix
Navegando por internet me encontré con un script que nos puede ser de mucha utilidad si queremos controla el estado de carga de un sistema Unix. En caso de que la carga del sistema sobrepase un determinado límite, el script mandará un email al administrador del sistema para notificarle dicha alerta.
#!/bin/bash # # Script to notify admin user if Linux,FreeBSD load crossed certain limit # It will send an email notification to admin. # # Copyright 2005 (c) nixCraft project # This is free script under GNU GPL version 2.0 or above. # Support/FeedBack/comment : http://cyberciti.biz/fb/ # Tested os: # * RedHat Linux # * Debain Linux # * FreeBSD # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- # Set up limit below NOTIFY="6.0" # admin user email id EMAIL="root" # Subject for email SUBJECT="Alert $(hostname) load average" # ----------------------------------------------------------------- # Os Specifc tweaks do not change anything below ;) OS="$(uname)" TRUE="1" if [ "$OS" == "FreeBSD" ]; then TEMPFILE="$(mktemp /tmp/$(basename $0).tmp.XXX)" FTEXT='load averages:' elif [ "$OS" == "Linux" ]; then TEMPFILE="$(mktemp)" FTEXT='load average:' fi # get first 5 min load F5M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f1) | sed 's/ //g'" # 10 min F10M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f2) | sed 's/ //g'" # 15 min F15M="$(uptime | awk -F "$FTEXT" '{ print $2 }' | cut -d, -f3) | sed 's/ //g'" # mail message # keep it short coz we may send it to page or as an short message (SMS) echo "Load average Crossed allowed limit $NOTIFY." >> $TEMPFILE echo "Hostname: $(hostname)" >> $TEMPFILE echo "Local Date & Time : $(date)" >> $TEMPFILE # Look if it crossed limit # compare it with last 15 min load average RESULT=$(echo "$F15M > $NOTIFY" | bc) # if so send an email if [ "$RESULT" == "$TRUE" ]; then mail -s "$SUBJECT" "$EMAIL" < $TEMPFILE fi # remove file rm -f $TEMPFILE
Si quereis revisar el script (con las últimas actualizaciones), podéis encontrarlo en bash.cyberciti.biz