130 lines
3.5 KiB
Go
130 lines
3.5 KiB
Go
// Copyright 2015 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 !nofilesystem
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// +build linux freebsd openbsd
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package collector
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import (
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"flag"
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"regexp"
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"github.com/prometheus/client_golang/prometheus"
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)
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// Arch-dependent implementation must define:
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// * defIgnoredMountPoints
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// * filesystemLabelNames
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// * filesystemCollector.GetStats
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var (
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ignoredMountPoints = flag.String(
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"collector.filesystem.ignored-mount-points",
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defIgnoredMountPoints,
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"Regexp of mount points to ignore for filesystem collector.")
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filesystemLabelNames = []string{"device", "mountpoint", "fstype"}
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)
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type filesystemCollector struct {
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ignoredMountPointsPattern *regexp.Regexp
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sizeDesc, freeDesc, availDesc,
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filesDesc, filesFreeDesc *prometheus.Desc
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}
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type filesystemStats struct {
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labelValues []string
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size, free, avail, files, filesFree float64
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}
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func init() {
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Factories["filesystem"] = NewFilesystemCollector
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}
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// Takes a prometheus registry and returns a new Collector exposing
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// Filesystems stats.
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func NewFilesystemCollector() (Collector, error) {
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subsystem := "filesystem"
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pattern := regexp.MustCompile(*ignoredMountPoints)
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sizeDesc := prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "size"),
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"Filesystem size in bytes.",
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filesystemLabelNames, nil,
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)
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freeDesc := prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "free"),
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"Filesystem free space in bytes.",
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filesystemLabelNames, nil,
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)
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availDesc := prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "avail"),
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"Filesystem space available to non-root users in bytes.",
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filesystemLabelNames, nil,
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)
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filesDesc := prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "files"),
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"Filesystem total file nodes.",
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filesystemLabelNames, nil,
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)
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filesFreeDesc := prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "files_free"),
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"Filesystem total free file nodes.",
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filesystemLabelNames, nil,
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)
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return &filesystemCollector{
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ignoredMountPointsPattern: pattern,
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sizeDesc: sizeDesc,
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freeDesc: freeDesc,
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availDesc: availDesc,
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filesDesc: filesDesc,
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filesFreeDesc: filesFreeDesc,
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}, nil
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}
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func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
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stats, err := c.GetStats()
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if err != nil {
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return err
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}
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for _, s := range stats {
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ch <- prometheus.MustNewConstMetric(
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c.sizeDesc, prometheus.GaugeValue,
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s.size, s.labelValues...,
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)
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ch <- prometheus.MustNewConstMetric(
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c.freeDesc, prometheus.GaugeValue,
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s.free, s.labelValues...,
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)
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ch <- prometheus.MustNewConstMetric(
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c.availDesc, prometheus.GaugeValue,
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s.avail, s.labelValues...,
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)
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ch <- prometheus.MustNewConstMetric(
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c.filesDesc, prometheus.GaugeValue,
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s.files, s.labelValues...,
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)
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ch <- prometheus.MustNewConstMetric(
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c.filesFreeDesc, prometheus.GaugeValue,
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s.filesFree, s.labelValues...,
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)
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}
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return nil
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}
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