Created
June 26, 2020 19:08
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FreeNAS Disk Temperature Monitoring
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| #!/usr/local/bin/python3 | |
| import curses | |
| from curses import wrapper | |
| import math | |
| import time | |
| import psutil | |
| from pySMART import DeviceList, Device | |
| REFRESH_INTERVAL = 10 | |
| REFRESH_TICK_TIME = 0.05 | |
| ESCAPE_KEY = 27 | |
| COL_WHITE_ON_BLACK = 10 | |
| COL_BLACK_ON_GREEN = 2 | |
| COL_BLUE_ON_BLACK = 3 | |
| COL_CYAN_ON_BLACK = 4 | |
| COL_GREEN_ON_BLACK = 5 | |
| COL_YELLOW_ON_BLACK = 6 | |
| COL_RED_ON_BLACK = 7 | |
| TEMP_THRESHOLDS = { 'nvme': [75, 85], 'nvme_max': [70, 80], 'ssd': [45, 55], 'hdd': [50, 60] } | |
| TEMP_COLOURS = [COL_GREEN_ON_BLACK, COL_YELLOW_ON_BLACK, COL_RED_ON_BLACK] | |
| class FreeNasMonitor: | |
| stdscr = None | |
| smart = None | |
| def __init__(self, stdscr): | |
| self.stdscr = stdscr | |
| self.stdscr.clear() | |
| # put the window into no-delay mode | |
| # in this mode calls to stuff like getkey() are non-blocking | |
| self.stdscr.nodelay(True) | |
| # enable keypad mode | |
| self.stdscr.keypad(True) | |
| # hide the cursor | |
| curses.curs_set(False) | |
| # set up colours | |
| curses.start_color() | |
| curses.init_pair(COL_WHITE_ON_BLACK, curses.COLOR_WHITE, curses.COLOR_BLACK) | |
| curses.init_pair(COL_BLACK_ON_GREEN, curses.COLOR_BLACK, curses.COLOR_GREEN) | |
| curses.init_pair(COL_CYAN_ON_BLACK, curses.COLOR_CYAN, curses.COLOR_BLACK) | |
| curses.init_pair(COL_BLUE_ON_BLACK, curses.COLOR_BLUE, curses.COLOR_BLACK) | |
| curses.init_pair(COL_GREEN_ON_BLACK, curses.COLOR_GREEN, curses.COLOR_BLACK) | |
| curses.init_pair(COL_YELLOW_ON_BLACK, curses.COLOR_YELLOW, curses.COLOR_BLACK) | |
| curses.init_pair(COL_RED_ON_BLACK, curses.COLOR_RED, curses.COLOR_BLACK) | |
| # apply default colours | |
| self.stdscr.attrset(curses.A_NORMAL | curses.color_pair(COL_WHITE_ON_BLACK)) | |
| self.stdscr.attron(curses.A_NORMAL | curses.color_pair(COL_WHITE_ON_BLACK)) | |
| #if curses.can_change_color(): | |
| # self.stdscr.addstr(1, 0, '(enhanced colour mode)') | |
| #else: | |
| # self.stdscr.addstr(1, 0, '(normal colour mode)') | |
| #self.stdscr.addstr(2, 0, 'there are {} colours available'.format(curses.COLORS)) | |
| # enumerate devices | |
| self.stdscr.addstr(0, 0, 'Enumerating SMART devices...') | |
| self.stdscr.refresh() | |
| self.smart = DeviceList() | |
| self.stdscr.clear() | |
| def begin(self): | |
| # refresh loop | |
| last_refresh_time = 0 | |
| while True: | |
| # has a refresh interval passed? if so, refresh | |
| #stdscr.addstr(0, 0, '{}'.format(time.perf_counter())) | |
| if time.perf_counter() - last_refresh_time >= REFRESH_INTERVAL: | |
| last_refresh_time = time.perf_counter() | |
| self.refresh() | |
| # delay for one tick | |
| time.sleep(REFRESH_TICK_TIME) | |
| key = self.stdscr.getch() | |
| if key != -1: | |
| self.handle_input(key) | |
| def refresh(self): | |
| #self.stdscr.addstr(0, 0, '{}'.format(time.perf_counter())) | |
| self.draw_header() | |
| max_y, max_x = self.stdscr.getmaxyx() | |
| name_size = 10 | |
| value_size = 8 | |
| gap_size = 4 | |
| total_pad = name_size + value_size + gap_size | |
| col_width = math.trunc(max_x / 2.0) | |
| graph_width = math.trunc((max_x / 2.0) - total_pad) | |
| col = 0 | |
| line = 1 | |
| for device in self.smart.devices: | |
| device.update() | |
| #temperatures = "" | |
| #if len(device.temperatures) > 0: | |
| # for sensor in device.temperatures: | |
| # temperatures += "{}\t".format(device.temperatures[sensor]) | |
| #else: | |
| # temperatures = '{}'.format(device.temperature) | |
| #self.stdscr.addstr(line, 0, '{} [{} {}]: {}'.format(device.name, device.model, device.serial, temperatures)) | |
| # work out what kind of device we've got | |
| threshold_id = 'hdd' | |
| if 'nvme' in device.name: | |
| threshold_id = 'nvme' | |
| elif device.is_ssd: | |
| threshold_id = 'ssd' | |
| # add the basic temperature value | |
| temps = [] | |
| temps.append((threshold_id, device.temperature)) | |
| # if there are extended (nvme) temperature values, add the max too | |
| if len(device.temperatures) > 0: | |
| max_temp = -9999 | |
| for sensor in device.temperatures: | |
| max_temp = max(max_temp, device.temperatures[sensor]) | |
| temps.append(('nvme_max', max_temp)) | |
| t = 0 | |
| for temp_data in temps: | |
| threshold_id, temp = temp_data | |
| self.stdscr.addstr(line, col * col_width, device.name, curses.A_BOLD) | |
| self.stdscr.addstr('.{}'.format(t), curses.color_pair(COL_BLUE_ON_BLACK) | curses.A_BOLD) | |
| colour = TEMP_COLOURS[0] | |
| thresholds = TEMP_THRESHOLDS[threshold_id] | |
| if temp >= thresholds[1]: | |
| colour = TEMP_COLOURS[2] | |
| elif temp >= thresholds[0]: | |
| colour = TEMP_COLOURS[1] | |
| #self.stdscr.addstr(line, 150, '{}'.format(colour)) | |
| self.draw_bar_minmax(line, name_size + (col * col_width), graph_width, 10, 110, temp, '°C', colour) | |
| t += 1 | |
| col += 1 | |
| if col > 1: | |
| line += 1 | |
| col = 0 | |
| #cpu_line = 1 | |
| #cpu_idx = 0 | |
| #cpus = psutil.cpu_percent(0, True) | |
| #for cpu in cpus: | |
| # stdscr.addstr(cpu_line, 0, 'CPU{}: {}'.format(cpu_idx, cpu)) | |
| # draw_bar(stdscr, 0, cpu_line, 40, cpu) | |
| # cpu_line += 1 | |
| # cpu_idx += 1 | |
| self.stdscr.refresh() | |
| def draw_header(self): | |
| height, width = self.stdscr.getmaxyx() | |
| message = 'Disk Stats [' + time.strftime('%H:%M:%S', time.localtime()) + ']' | |
| msglen = len(message) | |
| self.stdscr.addstr(0, 0, ' ' + message + ' ' * (width - msglen - 1), curses.color_pair(COL_BLACK_ON_GREEN)) | |
| def draw_bar_minmax(self, y, x, width, min, max, value, unit, colour): | |
| self.stdscr.addstr(y, x, '[', curses.color_pair(COL_CYAN_ON_BLACK) | curses.A_BOLD) | |
| self.stdscr.addstr(y, x + (width - 1), ']', curses.color_pair(COL_CYAN_ON_BLACK) | curses.A_BOLD) | |
| range = max - min | |
| scale = (width - 2) / range | |
| size = (value - min) * scale | |
| bars = math.trunc(size) | |
| self.stdscr.addstr(y, x + 1, ' ' * (width - 2), curses.color_pair(colour)) | |
| self.stdscr.addstr(y, x + 1, '|' * bars, curses.color_pair(colour) | curses.A_BOLD) | |
| self.stdscr.addstr(y, x + width + 1, '{}{}'.format(value, unit)) | |
| def draw_bar_percent(self, x, y, width, percent): | |
| self.stdscr.addstr(y, x, '[' + ' ' * (width - 2) + ']') | |
| self.stdscr.addstr(y, x + width + 2, '{}'.format(percent)) | |
| value = (width - 2) * (percent / 100.0) | |
| bars = math.trunc(value) | |
| self.stdscr.addstr(y, x + 1, '|' * bars) | |
| def handle_input(self, key): | |
| if key == ESCAPE_KEY: | |
| exit() | |
| def main(stdscr): | |
| monitor = FreeNasMonitor(stdscr) | |
| monitor.begin() | |
| wrapper(main) | |
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