監控 Linux 主機溫度風扇 (lm-sensors)

因為透過 LibreNMS 監控 Linux 實體主機, 會發現預設的 sensors 可能無法正常提供資料或名稱無法正確解析, 可以透過修改或建立感應器設定檔來解決 Exp. /etc/sensors.d/nct6798.conf

安裝與設定 lm-sensors

apt update
apt install lm-sensors
sensors-detect --auto

重啟服務
```
service kmod restart
sensors -s
```

查看結果

# sensors
nct6798-isa-02a0
Adapter: ISA adapter
in0:                     1.39 V  (min =  +0.00 V, max =  +1.74 V)
in1:                     1.02 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in2:                     3.41 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in3:                     3.39 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in4:                   984.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in5:                   152.00 mV (min =  +0.00 V, max =  +0.00 V)
in6:                   136.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in7:                     3.41 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in8:                     3.18 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in9:                     1.06 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in10:                  160.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in11:                  128.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in12:                    1.06 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in13:                  160.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in14:                    1.50 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
fan1:                     0 RPM  (min =    0 RPM)
fan2:                  1824 RPM  (min =  800 RPM)
fan3:                     0 RPM  (min =    0 RPM)
fan4:                     0 RPM  (min =    0 RPM)
fan5:                     0 RPM  (min =    0 RPM)
fan7:                     0 RPM  (min =    0 RPM)
SYSTIN:                +113.0°C  (high = +80.0°C, hyst = +75.0°C)
                                 (crit = +100.0°C)  sensor = thermistor
CPUTIN:                 +46.0°C  (high = +80.0°C, hyst = +75.0°C)
                                 (crit = +100.0°C)  sensor = thermistor
AUXTIN0:               +110.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM
                                 (crit = +100.0°C)  sensor = thermistor
AUXTIN1:               +111.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM
                                 (crit = +100.0°C)  sensor = thermistor
AUXTIN2:               +111.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM
                                 (crit = +100.0°C)  sensor = thermistor
AUXTIN3:                 -1.0°C  (high = +80.0°C, hyst = +75.0°C)
                                 (crit = +100.0°C)  sensor = thermistor
PECI Agent 0:           +57.5°C  (high =  +1.0°C, hyst = +75.0°C)  ALARM
AUXTIN4:               +105.0°C  (high = +80.0°C, hyst = +75.0°C)  ALARM
                                 (crit = +100.0°C)
PCH_CHIP_CPU_MAX_TEMP:   +0.0°C
PCH_CHIP_TEMP:           +0.0°C
PCH_CPU_TEMP:            +0.0°C
PCH_MCH_TEMP:            +0.0°C
intrusion0:            ALARM
intrusion1:            ALARM
beep_enable:           disabled

nvme-pci-0100
Adapter: PCI adapter
Composite:    +50.9°C  (low  =  -5.2°C, high = +89.8°C)
                       (crit = +93.8°C)

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:            N/A

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +58.0°C  (high = +80.0°C, crit = +100.0°C)
Core 0:        +58.0°C  (high = +80.0°C, crit = +100.0°C)
Core 4:        +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 8:        +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 12:       +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 16:       +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 20:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 24:       +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 28:       +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 32:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 33:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 34:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 35:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 36:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 37:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 38:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 39:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 40:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 41:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 42:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 43:       +52.0°C  (high = +80.0°C, crit = +100.0°C)

針對 sensors 的異常項目進行修改

temp3, temp4, temp5, temp6, temp8 都是 0 或很奇怪的數字, 要移除不呈現

 vi /etc/sensors.d/nct6798.conf

chip "nct6798-isa-*"
    ignore temp3
    ignore temp4
    ignore temp5
    ignore temp6
    ignore temp8

fan1, fan3, fan4, fan5, fan7 都是 0 , 要移除不呈現

 vi /etc/sensors.d/nct6798.conf

chip "nct6798-isa-*"
    ignore temp3
    ignore temp4
    ignore temp5
    ignore temp6
    ignore temp8

    # 忽略未使用的風扇
    ignore fan1
    ignore fan3
    ignore fan4
    ignore fan5
    ignore fan7

設定 fan2 的顯示名稱為 'CPU FAN', 並設定最小轉數 800 rpm

 vi /etc/sensors.d/nct6798.conf

chip "nct6798-isa-*"
    ignore temp3
    ignore temp4
    ignore temp5
    ignore temp6
    ignore temp8

    # 忽略未使用的風扇
    ignore fan1
    ignore fan3
    ignore fan4
    ignore fan5
    ignore fan7

    # 設定 fan2 最小轉速
    set fan2_min 800
    label fan2 "CPU FAN"

要重新啟動服務
```
service kmod restart
sensors -s
```

檢查是否如預期的呈現結果

sensors

# sensors
nct6798-isa-02a0
Adapter: ISA adapter
in0:                     1.40 V  (min =  +0.00 V, max =  +1.74 V)
in1:                     1.02 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in2:                     3.41 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in3:                     3.39 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in4:                   992.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in5:                   152.00 mV (min =  +0.00 V, max =  +0.00 V)
in6:                   136.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in7:                     3.41 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in8:                     3.18 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in9:                     1.06 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in10:                  160.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in11:                  128.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in12:                    1.06 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
in13:                  160.00 mV (min =  +0.00 V, max =  +0.00 V)  ALARM
in14:                    1.51 V  (min =  +0.00 V, max =  +0.00 V)  ALARM
CPU FAN:               1920 RPM  (min =  800 RPM)
SYSTIN:                +113.0°C  (high = +80.0°C, hyst = +75.0°C)
                                 (crit = +100.0°C)  sensor = thermistor
CPUTIN:                 +46.0°C  (high = +80.0°C, hyst = +75.0°C)
                                 (crit = +100.0°C)  sensor = thermistor
PECI Agent 0:           +54.5°C  (high =  +1.0°C, hyst = +75.0°C)  ALARM
PCH_CHIP_CPU_MAX_TEMP:   +0.0°C
PCH_CHIP_TEMP:           +0.0°C
PCH_CPU_TEMP:            +0.0°C
PCH_MCH_TEMP:            +0.0°C
intrusion0:            ALARM
intrusion1:            ALARM
beep_enable:           disabled

nvme-pci-0100
Adapter: PCI adapter
Composite:    +51.9°C  (low  =  -5.2°C, high = +89.8°C)
                       (crit = +93.8°C)

iwlwifi_1-virtual-0
Adapter: Virtual device
temp1:            N/A

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +71.0°C  (high = +80.0°C, crit = +100.0°C)
Core 0:        +59.0°C  (high = +80.0°C, crit = +100.0°C)
Core 4:        +50.0°C  (high = +80.0°C, crit = +100.0°C)
Core 8:        +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 12:       +56.0°C  (high = +80.0°C, crit = +100.0°C)
Core 16:       +70.0°C  (high = +80.0°C, crit = +100.0°C)
Core 20:       +71.0°C  (high = +80.0°C, crit = +100.0°C)
Core 24:       +57.0°C  (high = +80.0°C, crit = +100.0°C)
Core 28:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 32:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 33:       +53.0°C  (high = +80.0°C, crit = +100.0°C)
Core 34:       +54.0°C  (high = +80.0°C, crit = +100.0°C)
Core 35:       +54.0°C  (high = +80.0°C, crit = +100.0°C)
Core 36:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 37:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 38:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 39:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 40:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 41:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 42:       +52.0°C  (high = +80.0°C, crit = +100.0°C)
Core 43:       +52.0°C  (high = +80.0°C, crit = +100.0°C)

如果要讓 LibreNMS 看到正確的資料, 需要重新啟動 snmpd
```
systemctl restart snmpd
```