Add chip_name to temperature metric collection prometheus-node-exporter-lua/hwmon

[vgropp]

removes duplicate sample with mt7996 and others with multiple radios

📦 Package Details

Maintainer: @champtar

Description:
Using the hwmon collector with a Banana Pi BPI-R4 there are duplicate samples for node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy0"}. This results in prometheus warnings:
level=WARN source=scrape.go:1923 msg="Error on ingesting samples with different value but same timestamp" component="scrape manager" scrape_pool=node-exporter target=http://<ip>:9100/metrics num_dropped=2

Adding the chip_name to node_hwmon_temp_celsius fixes this.

Current metrics:
Banana Pi BPI-R4

node_hwmon_chip_names{chip_name="mt7996_phy0.0",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy0"} 49
node_hwmon_chip_names{chip_name="mt7996_phy0.1",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy0"} 49
node_hwmon_chip_names{chip_name="mt7996_phy0.2",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy0"} 51

GL.iNet GL-MT6000

node_hwmon_chip_names{chip_name="cpu_thermal",chip="thermal_thermal_zone0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="thermal_thermal_zone0"} 45.499
node_hwmon_chip_names{chip_name="mdio_bus:01",chip="mdio-bus_mdio-bus:01"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="mdio-bus_mdio-bus:01"} 52
node_hwmon_chip_names{chip_name="mdio_bus:07",chip="mdio-bus_mdio-bus:07"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="mdio-bus_mdio-bus:07"} 64
node_hwmon_chip_names{chip_name="mt7915_phy0",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy0"} 49
node_hwmon_chip_names{chip_name="mt7915_phy1",chip="ieee80211_phy1"} 1
node_hwmon_temp_celsius{sensor="temp1",chip="ieee80211_phy1"} 49

Fixed metrics:
Banana Pi BPI-R4

node_hwmon_chip_names{chip_name="mt7996_phy0.0",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mt7996_phy0.0",chip="ieee80211_phy0"} 55
node_hwmon_chip_names{chip_name="mt7996_phy0.1",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mt7996_phy0.1",chip="ieee80211_phy0"} 55
node_hwmon_chip_names{chip_name="mt7996_phy0.2",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mt7996_phy0.2",chip="ieee80211_phy0"} 55

GL.iNet GL-MT6000

node_hwmon_chip_names{chip_name="cpu_thermal",chip="thermal_thermal_zone0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="cpu_thermal",chip="thermal_thermal_zone0"} 45.499
node_hwmon_chip_names{chip_name="mdio_bus:01",chip="mdio-bus_mdio-bus:01"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mdio_bus:01",chip="mdio-bus_mdio-bus:01"} 52
node_hwmon_chip_names{chip_name="mdio_bus:07",chip="mdio-bus_mdio-bus:07"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mdio_bus:07",chip="mdio-bus_mdio-bus:07"} 64
node_hwmon_chip_names{chip_name="mt7915_phy0",chip="ieee80211_phy0"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mt7915_phy0",chip="ieee80211_phy0"} 49
node_hwmon_chip_names{chip_name="mt7915_phy1",chip="ieee80211_phy1"} 1
node_hwmon_temp_celsius{sensor="temp1",chip_name="mt7915_phy1",chip="ieee80211_phy1"} 48

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🧪 Run Testing Details

• OpenWrt Version: OpenWrt SNAPSHOT r32316
• OpenWrt Target/Subtarget: mediatek/filogic
• OpenWrt Device: Banana Pi BPI-R4, GL.iNet GL-MT6000

---

✅ Formalities

• I have reviewed the CONTRIBUTING.md file for detailed contributing guidelines.

If your PR contains a patch:

• It can be applied using git am
• It has been refreshed to avoid offsets, fuzzes, etc., using

  make package/<your-package>/refresh V=s

• It is structured in a way that it is potentially upstreamable
  _{(e.g., subject line, commit description, etc.)
  We must try to upstream patches to reduce maintenance burden.}

[GeorgeSapkin]

The commit message needs to be prefixed with a package name and follow the 50/75 rule as per the submissions guidelines. And the package needs a PKG_RELEASE bump.

[vgropp]

sorry for not following guidelines, i hope its fine now

[vgropp]

ok, i have no clue at all about these build failures. I can see libcurl recursive dependency and other errors but i dont understand why the build is failing by a change in the .lua script. I hope ill find more time to debug the full build process the next days