Linux Hardware Sensors (libsensors)

Plugin: debugfs.plugin Module: libsensors

Overview

Collects hardware sensor readings (temperature, voltage, fan speed, current, power, energy, humidity and intrusion state) from all hardware monitoring chips exposed by the Linux hwmon subsystem. Every sensor gets its own chart, a cross-platform temperature histogram summarizes all temperature sensors in fixed bands, and a live sensors function lists every discovered sensor with its current reading and state.

Uses a bundled copy of the libsensors library (the same library behind the sensors command) to enumerate and read the hardware monitoring chips exposed under /sys/class/hwmon.

This collector is only supported on the following platforms:

• Linux

This collector only supports collecting metrics from a single instance of this integration.

The hwmon sysfs attributes are generally world-readable, so no additional permissions beyond the ones the debugfs plugin already has are required.

Default Behavior

Auto-Detection

All hardware monitoring chips exposed by the hwmon subsystem are detected and collected automatically. The collection interval is automatically raised above the configured update every when reading the sensors is slow.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Setup

Prerequisites

No action required.

Configuration

Options

Config options

Option	Description	Default	Required
update every	Data collection frequency.	1	no
command options	Additional parameters for collector		no

via File

The configuration file name for this integration is netdata.conf. Configuration for this specific integration is located in the [plugin:debugfs] section within that file.

The file format is a modified INI syntax. The general structure is:

[section1]
    option1 = some value
    option2 = some other value

[section2]
    option3 = some third value

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config netdata.conf

Examples

There are no configuration examples.

Alerts

There are no alerts configured by default for this integration.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per-sensor charts are created for every supported reading of every discovered sensor; the alarm charts expose only the states each sensor driver actually supports. The temperature histogram is a single host-wide chart with the same fixed bands on every operating system: each dimension is a DISJOINT band named after its EXCLUSIVE upper bound in degrees Celsius, and every temperature sensor is counted in exactly one band.

Per sensor

These metrics refer to a hardware sensor chip feature.

Labels:

Label	Description
feature	Stable sensor feature identifier
label	Human-readable sensor label
chip_id	Sensor chip identifier
path	The hwmon sysfs path of the sensor chip
subsystem	Hardware subsystem the sensor chip belongs to
driver	Kernel driver providing the sensor

Metrics:

Metric	Dimensions	Unit
system.hw.sensor.temperature.input	input	degrees Celsius
system.hw.sensor.temperature.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.voltage.input	input	Volts
system.hw.sensor.voltage.average	average	Volts
system.hw.sensor.voltage.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.fan.input	input	rotations per minute
system.hw.sensor.fan.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.current.input	input	Amperes
system.hw.sensor.current.average	average	Amperes
system.hw.sensor.current.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.power.input	input	Watts
system.hw.sensor.power.average	average	Watts
system.hw.sensor.power.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.energy.input	input	Joules
system.hw.sensor.energy.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.humidity.input	input	percentage
system.hw.sensor.humidity.alarm	clear, warning, cap, alarm, critical, emergency, fault	status
system.hw.sensor.intrusion.alarm	clear, warning, cap, alarm, critical, emergency, fault	status

Per Linux Hardware Sensors (libsensors) instance

Host-wide summary of all temperature sensors.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
system.hw.sensor.temperature.histogram	40, 50, 60, 70, 80, 85, 90, 95, 100, +Inf	sensors