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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, "<EFBFBD>")) |
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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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