tell slack when load is high

gistfile1.txt

#!/bin/bash
set -euv

function tellSlack() {
    echo "TELL-SLACK:" "$@"
    cat <<EOF | curl --silent -X POST --data-binary @- "${SLACK_WEBHOOK}"
    payload={"type": "mrkdwn", "text":"\`$@\`"}
EOF
}


load=$(uptime | awk '{print $10}' | cut -d "," -f 1)
fullload=$(uptime | awk '{print $10 $11 $12}')

if (( $(echo "$load > 4.0" | bc -l) )); then
  tellSlack "*HIGH LOAD* $load on $(hostname)  - ${fullload}"
  touch .high-load
elif test -f .high-load; then
   rm .high-load   
   tellSlack "load ok $load on $(hostname)"
fi

hacky script i made in an outage, whacked into cron, to yell at us if load climbs again