Bash scripts for managing safe nodes on Linux

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  • Wait for CPU% to decrease below desired threshold (CPUMAX)
    Extracted from original script. Could replace a fixed duration sleep.
CPUMAX=90.0 # Required cpu % or lower to exit monitoring loop
cpu=100
while [ 1 -eq "$(echo "$cpu > $CPUMAX" | bc )" ]
do
 cpu=$(awk '{u=$2+$4; t=$2+$4+$5; if (NR==1){u1=u; t1=t;} else print ($2+$4-u1) * 100 / (t-t1) ; }' <(grep 'cpu ' /proc/stat) <(sleep 1;grep 'cpu ' /proc/stat))
 echo -n "."
done
echo "reached $cpu %"
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