CPU Temperature metric for Mackerel

cpu-temperature.sh

#!/bin/bash

if ! [ -f /usr/local/bin/osx-cpu-temp 1>/dev/null 2>&1 ]; then
  brew install https://raw.githubusercontent.com/tasuten/homebrew-myformulas/master/osx-cpu-temp.rb > /dev/null 2>&1
fi

if [ x$MACKEREL_AGENT_PLUGIN_META = x1 ]; then
  cat << EOF
# mackerel-agent-plugin
{
  "graphs": {
    "cpu": {
      "label": "CPU Temperature",
      "unit": "float",
      "metrics": [
        { "name": "temperature", "label": "CPU Temperature / deg" }
      ]
    }
  }
}
EOF
  exit 0
fi

temperature=$(/usr/local/bin/osx-cpu-temp | sed -e 's/[^0-9.]//g' | tr -d '\n')
if (( $(bc <<< "$temperature > 100") == 1 )); then
  temperature=30
fi

echo -e "cpu.temperature\t\
$temperature\t\
$(date +%s)"