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// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build linux && !nodmi
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// +build linux,!nodmi
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package collector
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import (
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"errors"
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"fmt"
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"log/slog"
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"os"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs/sysfs"
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)
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type dmiCollector struct {
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infoDesc *prometheus.Desc
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values []string
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}
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func init() {
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registerCollector("dmi", defaultEnabled, NewDMICollector)
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}
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// NewDMICollector returns a new Collector exposing DMI information.
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func NewDMICollector(logger *slog.Logger) (Collector, error) {
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fs, err := sysfs.NewFS(*sysPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open sysfs: %w", err)
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}
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dmi, err := fs.DMIClass()
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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logger.Debug("Platform does not support Desktop Management Interface (DMI) information", "err", err)
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dmi = &sysfs.DMIClass{}
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} else {
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return nil, fmt.Errorf("failed to read Desktop Management Interface (DMI) information: %w", err)
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}
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}
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var labels, values []string
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for label, value := range map[string]*string{
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"bios_date": dmi.BiosDate,
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"bios_release": dmi.BiosRelease,
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"bios_vendor": dmi.BiosVendor,
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"bios_version": dmi.BiosVersion,
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"board_asset_tag": dmi.BoardAssetTag,
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"board_name": dmi.BoardName,
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"board_serial": dmi.BoardSerial,
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"board_vendor": dmi.BoardVendor,
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"board_version": dmi.BoardVersion,
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"chassis_asset_tag": dmi.ChassisAssetTag,
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"chassis_serial": dmi.ChassisSerial,
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"chassis_vendor": dmi.ChassisVendor,
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"chassis_version": dmi.ChassisVersion,
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"product_family": dmi.ProductFamily,
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"product_name": dmi.ProductName,
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"product_serial": dmi.ProductSerial,
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"product_sku": dmi.ProductSKU,
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"product_uuid": dmi.ProductUUID,
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"product_version": dmi.ProductVersion,
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"system_vendor": dmi.SystemVendor,
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} {
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if value != nil {
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labels = append(labels, label)
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values = append(values, strings.ToValidUTF8(*value, "<22>"))
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}
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}
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// Construct DMI metric only once since it will not change until the next reboot.
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return &dmiCollector{
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infoDesc: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "dmi", "info"),
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"A metric with a constant '1' value labeled by bios_date, bios_release, bios_vendor, bios_version, "+
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"board_asset_tag, board_name, board_serial, board_vendor, board_version, chassis_asset_tag, "+
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"chassis_serial, chassis_vendor, chassis_version, product_family, product_name, product_serial, "+
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"product_sku, product_uuid, product_version, system_vendor if provided by DMI.",
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labels, nil,
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),
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values: values,
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}, nil
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}
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func (c *dmiCollector) Update(ch chan<- prometheus.Metric) error {
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if len(c.values) == 0 {
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return ErrNoData
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}
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ch <- prometheus.MustNewConstMetric(c.infoDesc, prometheus.GaugeValue, 1.0, c.values...)
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return nil
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}
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