mirror of
https://github.com/prometheus/node_exporter.git
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3fb5f70b0c
Drop redundant GOOS build tags at start of file if the constraint is already specified by the filename, e.g. foo_GOOS.go or foo_GOOS_GOARCH.go, avoiding potential confusion in future. cf. https://pkg.go.dev/cmd/go#hdr-Build_constraints Signed-off-by: Daniel Swarbrick <daniel.swarbrick@gmail.com>
75 lines
2 KiB
Go
75 lines
2 KiB
Go
// 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 !nonvme
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// +build !nonvme
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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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"os"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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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 nvmeCollector struct {
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fs sysfs.FS
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logger log.Logger
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}
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func init() {
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registerCollector("nvme", defaultEnabled, NewNVMeCollector)
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}
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// NewNVMeCollector returns a new Collector exposing NVMe stats.
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func NewNVMeCollector(logger log.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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return &nvmeCollector{
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fs: fs,
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logger: logger,
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}, nil
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}
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func (c *nvmeCollector) Update(ch chan<- prometheus.Metric) error {
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devices, err := c.fs.NVMeClass()
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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level.Debug(c.logger).Log("msg", "nvme statistics not found, skipping")
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return ErrNoData
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}
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return fmt.Errorf("error obtaining NVMe class info: %w", err)
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}
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for _, device := range devices {
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infoDesc := prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "nvme", "info"),
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"Non-numeric data from /sys/class/nvme/<device>, value is always 1.",
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[]string{"device", "firmware_revision", "model", "serial", "state"},
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nil,
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)
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infoValue := 1.0
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ch <- prometheus.MustNewConstMetric(infoDesc, prometheus.GaugeValue, infoValue, device.Name, device.FirmwareRevision, device.Model, device.Serial, device.State)
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}
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return nil
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}
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