smartctl_exporter/collect-smartctl-json.sh

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#! /bin/bash
script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
# Data directory to dump smartctl output
# This directory will be created if it doesn't exist
data_dir="${script_dir}/smartctl-data"
# The original script used --xall but that doesn't work
# This matches the command in readSMARTctl()
smartctl_args="--json --info --health --attributes --tolerance=verypermissive \
--nocheck=standby --format=brief --log=error"
# Determine the json query tool to use
if command -v jq >/dev/null; then
json_tool="jq"
json_args="--raw-output"
elif command -v yq >/dev/null; then
json_tool="yq"
json_args="--unwrapScalar"
else
echo -e "One of 'yq' or 'jq' is required. Please try again after \
installing one of them"
exit 1
fi
if [[ ! "${UID}" -eq 0 ]] && ! command -v sudo >/dev/null; then
# Not root and sudo doesn't exist
echo "sudo does not exist. Please run this as root"
exit 1
fi
SUDO="sudo"
if [[ "${UID}" -eq 0 ]]; then
# Don't use sudo if root
SUDO=""
fi
[[ ! -d "${data_dir}" ]] && mkdir --parents "${data_dir}"
if [[ $# -ne 0 ]]; then
devices="${1}"
else
devices="$(smartctl --scan --json | "${json_tool}" "${json_args}" \
'.devices[].name')"
mapfile -t devices <<< "${devices[@]}"
fi
for device in "${devices[@]}"
do
echo -n "Collecting data for '${device}'..."
# shellcheck disable=SC2086
data="$($SUDO smartctl ${smartctl_args} ${device})"
type="$(echo "${data}" | "${json_tool}" "${json_args}" '.device.type')"
family="$(echo "${data}" | "${json_tool}" "${json_args}" \
'select(.model_family != null) | .model_family | sub(" |/" ; "_" ; "g")')"
model="$(echo "${data}" | "${json_tool}" "${json_args}" \
'.model_name | sub(" |/" ; "_" ; "g")')"
device_name="$(basename "${device}")"
echo -e "\tSaving to ${type}-${family:=null}-${model}-${device_name}.json"
echo "${data}" > \
"${data_dir}/${type}-${family:=null}-${model}-${device_name}.json"
done