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// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build !nonvme
// +build !nonvme
package collector
import (
"errors"
"fmt"
"log/slog"
"os"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs/sysfs"
)
type nvmeCollector struct {
fs sysfs.FS
logger *slog.Logger
}
func init() {
registerCollector("nvme", defaultEnabled, NewNVMeCollector)
}
// NewNVMeCollector returns a new Collector exposing NVMe stats.
func NewNVMeCollector(logger *slog.Logger) (Collector, error) {
fs, err := sysfs.NewFS(*sysPath)
if err != nil {
return nil, fmt.Errorf("failed to open sysfs: %w", err)
}
return &nvmeCollector{
fs: fs,
logger: logger,
}, nil
}
func (c *nvmeCollector) Update(ch chan<- prometheus.Metric) error {
devices, err := c.fs.NVMeClass()
if err != nil {
if errors.Is(err, os.ErrNotExist) {
c.logger.Debug("nvme statistics not found, skipping")
return ErrNoData
}
return fmt.Errorf("error obtaining NVMe class info: %w", err)
}
for _, device := range devices {
infoDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, "nvme", "info"),
"Non-numeric data from /sys/class/nvme/<device>, value is always 1.",
[]string{"device", "firmware_revision", "model", "serial", "state"},
nil,
)
infoValue := 1.0
ch <- prometheus.MustNewConstMetric(infoDesc, prometheus.GaugeValue, infoValue, device.Name, device.FirmwareRevision, device.Model, device.Serial, device.State)
}
return nil
}
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