mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
135 lines
3.0 KiB
Go
135 lines
3.0 KiB
Go
// +build !nofilesystem
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package collector
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import (
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"errors"
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"flag"
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"regexp"
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"unsafe"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/log"
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)
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/*
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#include <sys/param.h>
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#include <sys/ucred.h>
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#include <sys/mount.h>
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#include <stdio.h>
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*/
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import "C"
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const (
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subsystem = "filesystem"
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)
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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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"^/(dev)($|/)",
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"Regexp of mount points to ignore for filesystem collector.")
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)
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type filesystemCollector struct {
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ignoredMountPointsPattern *regexp.Regexp
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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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func NewFilesystemCollector() (Collector, error) {
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pattern := regexp.MustCompile(*ignoredMountPoints)
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return &filesystemCollector{
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ignoredMountPointsPattern: pattern,
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}, nil
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}
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var (
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filesystemLabelNames = []string{"device", "mountpoint", "fstype"}
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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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)
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// Expose filesystem fullness.
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func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
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var mntbuf *C.struct_statfs
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count := C.getmntinfo(&mntbuf, C.MNT_NOWAIT)
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if count == 0 {
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return errors.New("getmntinfo() failed")
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}
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mnt := (*[1 << 30]C.struct_statfs)(unsafe.Pointer(mntbuf))
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for i := 0; i < int(count); i++ {
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name := C.GoString(&mnt[i].f_mntonname[0])
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if c.ignoredMountPointsPattern.MatchString(name) {
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log.Debugf("Ignoring mount point: %s", name)
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continue
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}
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ch <- prometheus.MustNewConstMetric(
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sizeDesc,
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prometheus.GaugeValue,
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float64(mnt[i].f_blocks) * float64(mnt[i].f_bsize),
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mpd.device, mpd.mountPoint, mpd.fsType,
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)
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ch <- prometheus.MustNewConstMetric(
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freeDesc,
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prometheus.GaugeValue,
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float64(mnt[i].f_bfree) * float64(mnt[i].f_bsize),
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mpd.device, mpd.mountPoint, mpd.fsType,
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)
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ch <- prometheus.MustNewConstMetric(
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availDesc,
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prometheus.GaugeValue,
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float64(mnt[i].f_bavail) * float64(mnt[i].f_bsize),
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mpd.device, mpd.mountPoint, mpd.fsType,
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)
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ch <- prometheus.MustNewConstMetric(
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filesDesc,
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prometheus.GaugeValue,
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float64(mnt[i].f_files),
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mpd.device, mpd.mountPoint, mpd.fsType,
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)
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ch <- prometheus.MustNewConstMetric(
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filesFreeDesc,
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prometheus.GaugeValue,
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float64(mnt[i].f_ffree),
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mpd.device, mpd.mountPoint, mpd.fsType,
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)
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}
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return nil
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}
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