37-nvmestatus

#!/bin/bash

# config
MAX_TEMP=40
# set column width
COLUMNS=2
# colors
white="\e[39m"
green="\e[1;32m"
red="\e[1;31m"
dim="\e[2m"
undim="\e[0m"

# NVMe devices to check
nvm_disks=(nvme0n1 nvme1n1)
nvm_names=(nvme0n1 nvme1n1)

# logfiles to check
logfiles='/var/log/syslog /var/log/syslog.1'

# get all lines with smartd entries from syslog
lines=$(tac $logfiles | grep -hiP 'smartd\[[[:digit:]]+\]:' | grep -iP "previous self-test")

out=""
for i in "${!nvm_disks[@]}"; do
    nvm_disk=${nvm_disks[$i]}
    # use nvm_names if given
    nvm_name=${nvm_names[$i]}
    if [ -z "${nvm_name}" ]; then
        nvm_name=$nvm_disk
    fi
    uuid=$(blkid -s UUID -o value "/dev/${nvm_disk}")
    status=$( (grep "${uuid}" <<< "${lines}") | grep -m 1 -oP "previous self-test.*" | awk '{ print $4 " " $5 }')
    temp=$(sudo nvme smart-log "/dev/${nvm_disk}" | grep -m 1 "temperature" | awk '{print $3}')

    # color green if temp <= MAX_TEMP, else red
    if [[ "${temp}" -gt "${MAX_TEMP}" ]]; then
        color=$red
    else
        color=$green
    fi
    # add "C" to temperature
    if [[ "$temp" =~ ^[0-9]+$ ]]; then
        temp="${temp}C"
    fi
    # color green if status is "without error", else red
    if [[ "${status}" == "without error" ]]; then
        status_color=$green
    else
        status_color=$red
    fi

    # print temp & smartd error
    out+="${nvm_name}:,${color}${temp}${undim} | ${status_color}${status}${undim},"
    # insert \n every $COLUMNS column
    if [ $((($i+1) % $COLUMNS)) -eq 0 ]; then
        out+="\n"
    fi
done
out+="\n"

printf "\nNVMe disk status:\n"
printf "$out" | column -ts $',' | sed -e 's/^/  /'