Get S.M.A.R.T. HDD Temps and save to InfluxDB (for FreeNAS)

hdd_temps.py

#!/usr/bin/env python

import os
import re
import subprocess
from influxdb import InfluxDBClient

from datetime import datetime
import time

client = InfluxDBClient('10.1.1.124', 8086, 'username', 'password', 'database_name')


def diskTemp(hostname):
    current_time = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ')
    print("")
    print(current_time)
    hdd_temps = {}
    for disk in listDisks():
        serial_found = False
        temp_found = False
        if 'da' in disk:
            sysctl = subprocess.Popen(
                ['/usr/local/sbin/smartctl', '-iA', '-n', 'standby', '/dev/'+disk], stdout=subprocess.PIPE)
            for line in sysctl.stdout:
                if 'Serial Number' in line.decode():
                    serial_found = True
                if 'Temperature_Celsius' in line.decode():
                    temp = ((float(line.decode().split()[9])) * 9/5) + 32
                    temp_found = True
                if serial_found == True and temp_found == True:
                    print("" + disk + "," + str(temp) + "")
                    hdd_temps[""+disk] = temp
                    break

    json_body = [
        {
            "measurement": "HDD_Temperatures",
            "tags": {
                "host": hostname
            },
            "time": current_time,
            "fields": hdd_temps
        }
    ]
    client.write_points(json_body)   

    

def listDisks():
    sysctl = subprocess.Popen(
        ['/sbin/sysctl', '-a', 'kern.disks'], stdout=subprocess.PIPE)
    while True:
        line = sysctl.stdout.readline()
        if line != '':
            return line.decode().split()
        else:
            break


def main():
    hostname = os.uname()[1]
    print(hostname)
    while True:
        diskTemp(hostname)
        time.sleep(60)


if __name__ == "__main__":
    main()

Based on https://gist.github.com/jacobtomlinson/e02b9c631c21e1606354564822e09f14

How about instead of writing your own smartctl output, parser, you could use the pySMART module (https://pypi.org/project/pySMART/)? iXsystems has done some work on to make pySMART 1.0 play nicely with FreeBSD. The pySMART module also takes care of detecting disks, so you wouldn't even need your own sysctl wrapper either.