mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-25 06:16:26 +01:00
125 lines
3.1 KiB
Go
125 lines
3.1 KiB
Go
// +build !nofilesystem
|
|
|
|
package collector
|
|
|
|
import (
|
|
"errors"
|
|
"flag"
|
|
"regexp"
|
|
"unsafe"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/log"
|
|
)
|
|
|
|
/*
|
|
#include <sys/param.h>
|
|
#include <sys/ucred.h>
|
|
#include <sys/mount.h>
|
|
#include <stdio.h>
|
|
*/
|
|
import "C"
|
|
|
|
const (
|
|
filesystemSubsystem = "filesystem"
|
|
)
|
|
|
|
var (
|
|
ignoredMountPoints = flag.String("collector.filesystem.ignored-mount-points", "^/(dev)($|/)", "Regexp of mount points to ignore for filesystem collector.")
|
|
)
|
|
|
|
type filesystemCollector struct {
|
|
ignoredMountPointsPattern *regexp.Regexp
|
|
|
|
size, free, avail, files, filesFree *prometheus.GaugeVec
|
|
}
|
|
|
|
func init() {
|
|
Factories["filesystem"] = NewFilesystemCollector
|
|
}
|
|
|
|
// Takes a prometheus registry and returns a new Collector exposing
|
|
// Filesystems stats.
|
|
func NewFilesystemCollector() (Collector, error) {
|
|
var filesystemLabelNames = []string{"filesystem"}
|
|
|
|
return &filesystemCollector{
|
|
ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
|
|
size: prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: filesystemSubsystem,
|
|
Name: "size_bytes",
|
|
Help: "Filesystem size in bytes.",
|
|
},
|
|
filesystemLabelNames,
|
|
),
|
|
free: prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: filesystemSubsystem,
|
|
Name: "free_bytes",
|
|
Help: "Filesystem free space in bytes.",
|
|
},
|
|
filesystemLabelNames,
|
|
),
|
|
avail: prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: filesystemSubsystem,
|
|
Name: "avail_bytes",
|
|
Help: "Filesystem space available to non-root users in bytes.",
|
|
},
|
|
filesystemLabelNames,
|
|
),
|
|
files: prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: filesystemSubsystem,
|
|
Name: "file_nodes",
|
|
Help: "Filesystem total file nodes.",
|
|
},
|
|
filesystemLabelNames,
|
|
),
|
|
filesFree: prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: Namespace,
|
|
Subsystem: filesystemSubsystem,
|
|
Name: "file_free_nodes",
|
|
Help: "Filesystem total free file nodes.",
|
|
},
|
|
filesystemLabelNames,
|
|
),
|
|
}, nil
|
|
}
|
|
|
|
// Expose filesystem fullness.
|
|
func (c *filesystemCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
var mntbuf *C.struct_statfs
|
|
count := C.getmntinfo(&mntbuf, C.MNT_NOWAIT)
|
|
if count == 0 {
|
|
return errors.New("getmntinfo() failed")
|
|
}
|
|
|
|
mnt := (*[1 << 30]C.struct_statfs)(unsafe.Pointer(mntbuf))
|
|
for i := 0; i < int(count); i++ {
|
|
name := C.GoString(&mnt[i].f_mntonname[0])
|
|
if c.ignoredMountPointsPattern.MatchString(name) {
|
|
log.Debugf("Ignoring mount point: %s", name)
|
|
continue
|
|
}
|
|
c.size.WithLabelValues(name).Set(float64(mnt[i].f_blocks) * float64(mnt[i].f_bsize))
|
|
c.free.WithLabelValues(name).Set(float64(mnt[i].f_bfree) * float64(mnt[i].f_bsize))
|
|
c.avail.WithLabelValues(name).Set(float64(mnt[i].f_bavail) * float64(mnt[i].f_bsize))
|
|
c.files.WithLabelValues(name).Set(float64(mnt[i].f_files))
|
|
c.filesFree.WithLabelValues(name).Set(float64(mnt[i].f_ffree))
|
|
}
|
|
|
|
c.size.Collect(ch)
|
|
c.free.Collect(ch)
|
|
c.avail.Collect(ch)
|
|
c.files.Collect(ch)
|
|
c.filesFree.Collect(ch)
|
|
return err
|
|
}
|