mirror of
https://github.com/prometheus/node_exporter.git
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125 lines
3.1 KiB
Go
125 lines
3.1 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/golang/glog"
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"github.com/prometheus/client_golang/prometheus"
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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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filesystemSubsystem = "filesystem"
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)
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var (
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ignoredMountPoints = flag.String("collector.filesystem.ignored-mount-points", "^/(dev)($|/)", "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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size, free, avail, files, filesFree *prometheus.GaugeVec
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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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// filesystems stats.
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func NewFilesystemCollector() (Collector, error) {
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var filesystemLabelNames = []string{"filesystem"}
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return &filesystemCollector{
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ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
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size: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Subsystem: filesystemSubsystem,
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Name: "size",
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Help: "Filesystem size in bytes.",
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},
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filesystemLabelNames,
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),
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free: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Subsystem: filesystemSubsystem,
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Name: "free",
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Help: "Filesystem free space in bytes.",
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},
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filesystemLabelNames,
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),
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avail: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Subsystem: filesystemSubsystem,
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Name: "avail",
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Help: "Filesystem space available to non-root users in bytes.",
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},
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filesystemLabelNames,
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),
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files: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Subsystem: filesystemSubsystem,
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Name: "files",
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Help: "Filesystem total file nodes.",
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},
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filesystemLabelNames,
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),
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filesFree: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Subsystem: filesystemSubsystem,
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Name: "files_free",
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Help: "Filesystem total free file nodes.",
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},
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filesystemLabelNames,
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),
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}, nil
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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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//printf("path: %s\t%lu\n", mntbuf[i].f_mntonname, mntbuf[i].f_bfree)
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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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glog.V(1).Infof("Ignoring mount point: %s", name)
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continue
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}
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c.size.WithLabelValues(name).Set(float64(mnt[i].f_blocks) * float64(mnt[i].f_bsize))
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c.free.WithLabelValues(name).Set(float64(mnt[i].f_bfree) * float64(mnt[i].f_bsize))
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c.avail.WithLabelValues(name).Set(float64(mnt[i].f_bavail) * float64(mnt[i].f_bsize))
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c.files.WithLabelValues(name).Set(float64(mnt[i].f_files))
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c.filesFree.WithLabelValues(name).Set(float64(mnt[i].f_ffree))
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}
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c.size.Collect(ch)
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c.free.Collect(ch)
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c.avail.Collect(ch)
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c.files.Collect(ch)
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c.filesFree.Collect(ch)
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return err
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}
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