mackerel plugin for puma processes

mackerel-plugin-puma-process

#!/bin/sh
#
# [plugin.metrics.puma_process]
# command = ["/usr/bin/mackerel-plugin-puma-process"]

if [ "$MACKEREL_AGENT_PLUGIN_META" = "1" ]; then
  echo "# mackerel-agent-plugin"
  cat << EOS
{
  "graphs": {
    "puma.processes": {
      "label": "Puma Process",
      "unit": "integer",
      "metrics": [
        {
          "name": "total",
          "label": "Total Puma Process"
        }
      ]
    },
    "puma.memory": {
      "label": "Puma Memory",
      "unit": "bytes",
      "metrics": [
        {
          "name": "total",
          "label": "Total Memory"
        },
        {
          "name": "average",
          "label": "Average Memory"
        }
      ]
    }
  }
}
EOS
else
  date=`date +%s`

  processes="$(ps awwwux | egrep "puma.* worker" | grep -v grep | wc -l)"
  echo "puma.processes.total\t${processes}\t${date}"

  processes_memory="$(ps auwx | egrep "puma.* worker" | grep -v grep | awk '{print $6 }')"
  for process_memory in $processes_memory; do
    total_memory=$(( $total_memory + ( $process_memory * 1024) ))
  done
  echo "puma.memory.total\t${total_memory}\t${date}"

  average="$(ps awwwux | egrep "puma.* worker" | grep -v grep | grep -v master | awk '{total_mem = $6 * 1024 + total_mem; total_proc++} END{printf("%d\n", total_mem / total_proc)}')"
  echo "puma.memory.average\t${average}\t${date}"
fi

exit 0