mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-30 07:59:53 -08:00
124 lines
3.1 KiB
Go
124 lines
3.1 KiB
Go
// +build !nofilesystem
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"flag"
|
|
"fmt"
|
|
"os"
|
|
"regexp"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"github.com/golang/glog"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
const (
|
|
procMounts = "/proc/mounts"
|
|
)
|
|
|
|
var (
|
|
fsSizeMetric = prometheus.NewGauge()
|
|
fsFreeMetric = prometheus.NewGauge()
|
|
fsAvailMetric = prometheus.NewGauge()
|
|
fsFilesMetric = prometheus.NewGauge()
|
|
fsFilesFreeMetric = prometheus.NewGauge()
|
|
|
|
ignoredMountPoints = flag.String("filesystemIgnoredMountPoints", "^/(sys|proc|dev)($|/)", "Regexp of mount points to ignore for filesystem collector.")
|
|
)
|
|
|
|
type filesystemCollector struct {
|
|
registry prometheus.Registry
|
|
config Config
|
|
ignoredMountPointsPattern *regexp.Regexp
|
|
}
|
|
|
|
func init() {
|
|
Factories["filesystem"] = NewFilesystemCollector
|
|
}
|
|
|
|
// Takes a config struct and prometheus registry and returns a new Collector exposing
|
|
// network device filesystems.
|
|
func NewFilesystemCollector(config Config, registry prometheus.Registry) (Collector, error) {
|
|
c := filesystemCollector{
|
|
config: config,
|
|
registry: registry,
|
|
ignoredMountPointsPattern: regexp.MustCompile(*ignoredMountPoints),
|
|
}
|
|
registry.Register(
|
|
"node_filesystem_size",
|
|
"Filesystem size in bytes.",
|
|
prometheus.NilLabels,
|
|
fsSizeMetric,
|
|
)
|
|
registry.Register(
|
|
"node_filesystem_free",
|
|
"Filesystem free space in bytes.",
|
|
prometheus.NilLabels,
|
|
fsFreeMetric,
|
|
)
|
|
registry.Register(
|
|
"node_filesystem_avail",
|
|
"Filesystem space available to non-root users in bytes.",
|
|
prometheus.NilLabels,
|
|
fsAvailMetric,
|
|
)
|
|
registry.Register(
|
|
"node_filesystem_files",
|
|
"Filesystem total file nodes.",
|
|
prometheus.NilLabels,
|
|
fsFilesMetric,
|
|
)
|
|
registry.Register(
|
|
"node_filesystem_files_free",
|
|
"Filesystem total free file nodes.",
|
|
prometheus.NilLabels,
|
|
fsFilesFreeMetric,
|
|
)
|
|
return &c, nil
|
|
}
|
|
|
|
// Expose filesystem fullness.
|
|
func (c *filesystemCollector) Update() (updates int, err error) {
|
|
mps, err := mountPoints()
|
|
if err != nil {
|
|
return updates, err
|
|
}
|
|
for _, mp := range mps {
|
|
if c.ignoredMountPointsPattern.MatchString(mp) {
|
|
glog.V(1).Infof("Ignoring mount point: %s", mp)
|
|
continue
|
|
}
|
|
buf := new(syscall.Statfs_t)
|
|
err := syscall.Statfs(mp, buf)
|
|
if err != nil {
|
|
return updates, fmt.Errorf("Statfs on %s returned %s", mp, err)
|
|
}
|
|
fsSizeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Blocks)*float64(buf.Bsize))
|
|
fsFreeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Bfree)*float64(buf.Bsize))
|
|
fsAvailMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Bavail)*float64(buf.Bsize))
|
|
fsFilesMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Files))
|
|
fsFilesFreeMetric.Set(map[string]string{"filesystem": mp}, float64(buf.Ffree))
|
|
updates++
|
|
}
|
|
return updates, err
|
|
}
|
|
|
|
func mountPoints() ([]string, error) {
|
|
file, err := os.Open(procMounts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
mountPoints := []string{}
|
|
scanner := bufio.NewScanner(file)
|
|
for scanner.Scan() {
|
|
parts := strings.Fields(scanner.Text())
|
|
mountPoints = append(mountPoints, parts[1])
|
|
}
|
|
return mountPoints, nil
|
|
}
|