worker-utilization.sh

#!/bin/bash

ENV=$1
ENVID=$2
REGION=$3

while true; do
  CURRENT_SECOND=$(date -d now -u "+%s")
  START=$(expr $CURRENT_SECOND % 5)

  if [[ $START -eq 0 ]]; then
    STATUS=$(curl -s http://localhost/status?json)

    ACTIVE_PROCS=$(jq '."active processes"' <<<$STATUS)
    TOTAL_PROCS=$(jq '."total processes"' <<<$STATUS)

    WORKER_UTILIZATION="$(echo "$ACTIVE_PROCS / $TOTAL_PROCS * 100" | bc -l)"

    aws cloudwatch put-metric-data \
      --region $REGION \
      --namespace Core/API_PHP_FPM \
      --metric-name WorkerUtilization \
      --dimensions role=backend,env=$ENV,envid=$ENVID \
      --unit Percent \
      --value $(printf %.f $WORKER_UTILIZATION)
  fi

  sleep 1
done