ipmitool-exporter

#! /bin/bash

set -u

COLLECT_INTERVAL_MS=1000
OUTPUT_FILE=/run/prometheus/ipmitool.prom
IPMITOOL_TEXT_COLLECTOR="/usr/share/doc/golang-github-prometheus-node_exporter-0.18.1/text_collector_examples/ipmitool"

usage() {
    echo "usage: $0 [-h] [-o output_file] [-d collect_interval_ms (>=100)]" >&2
}

options=$(getopt -o ho:d: -- "$@")
if [ $? -ne 0 ]; then
    usage && exit 1
fi
eval set -- "${options}"

while true; do
    case "$1" in
        -h) usage && exit 1;;
        -o) OUTPUT_FILE=$2; shift 2;;
        -d) COLLECT_INTERVAL_MS=$2; shift 2;;
        *)  break;;
    esac
done

if [ "${COLLECT_INTERVAL_MS}" -lt 100 ]; then
    usage && exit 1
fi
COLLECT_INTERVAL_SECONDS=$(bc <<< "scale=4;${COLLECT_INTERVAL_MS}/1000")

if [ ! -f $IPMITOOL_TEXT_COLLECTOR ]; then
    echo IPMItool textfile collector from node_exporter not found at \"$IPMITOOL_TEXT_COLLECTOR\". && exit 1
fi

mkdir -p $(dirname ${OUTPUT_FILE})
trap 'echo "Caught signal, terminating..." && kill %%' HUP INT QUIT PIPE TERM

echo "Collecting metrics at ${OUTPUT_FILE} every ${COLLECT_INTERVAL_MS}ms..."

while true; do
	ipmitool sensor | $IPMITOOL_TEXT_COLLECTOR > ${OUTPUT_FILE}.swp
	mv ${OUTPUT_FILE}.swp ${OUTPUT_FILE}
	sleep ${COLLECT_INTERVAL_SECONDS}
done &

wait $!

echo "Done"
exit 0