mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-18 04:15:06 +00:00
119 lines
2.9 KiB
Go
119 lines
2.9 KiB
Go
// Copyright 2016 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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// +build linux
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// +build !nozfs
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package collector
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import (
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"errors"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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)
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var zfsNotAvailableError = errors.New("ZFS / ZFS statistics are not available")
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type zfsSysctl string
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// Metrics
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type zfsMetric struct {
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subsystem string // The Prometheus subsystem name.
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name string // The Prometheus name of the metric.
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sysctl zfsSysctl // The sysctl of the ZFS metric.
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}
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// Collector
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func init() {
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Factories["zfs"] = NewZFSCollector
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}
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type zfsCollector struct {
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zfsMetrics []zfsMetric
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linuxProcpathBase string
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linuxZpoolIoPath string
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linuxPathMap map[string]string
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}
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func NewZFSCollector() (Collector, error) {
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var z zfsCollector
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z.linuxProcpathBase = "spl/kstat/zfs"
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z.linuxZpoolIoPath = "/*/io"
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z.linuxPathMap = map[string]string{
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"zfs_arc": "arcstats",
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"zfs_dmu_tx": "dmu_tx",
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"zfs_fm": "fm",
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"zfs_zfetch": "zfetchstats",
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"zfs_vdev_cache": "vdev_cache_stats",
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"zfs_xuio": "xuio_stats",
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"zfs_zil": "zil",
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}
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return &z, nil
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}
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func (c *zfsCollector) Update(ch chan<- prometheus.Metric) (err error) {
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for subsystem := range c.linuxPathMap {
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err = c.updateZfsStats(subsystem, ch)
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switch {
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case err == zfsNotAvailableError:
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log.Debug(err)
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return nil
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case err != nil:
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return err
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}
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}
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// Pool stats
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return c.updatePoolStats(ch)
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}
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func (s zfsSysctl) metricName() string {
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parts := strings.Split(string(s), ".")
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return strings.Replace(parts[len(parts)-1], "-", "_", -1)
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}
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func (c *zfsCollector) constSysctlMetric(subsystem string, sysctl zfsSysctl, value int) prometheus.Metric {
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metricName := sysctl.metricName()
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return prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, string(subsystem), metricName),
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string(sysctl),
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nil,
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nil,
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),
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prometheus.UntypedValue,
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float64(value),
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)
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}
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func (c *zfsCollector) constPoolMetric(poolName string, sysctl zfsSysctl, value int) prometheus.Metric {
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metricName := sysctl.metricName()
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return prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "zfs_zpool", metricName),
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string(sysctl),
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[]string{"zpool"},
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nil,
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),
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prometheus.UntypedValue,
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float64(value),
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poolName,
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)
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}
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