mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-22 14:12:21 +00:00
64e637cbcc
node_exporter currently triggers autofs to mount the underlying filesystem on every scrape. This is undesirable. Better ignore autofs. The underlying filesystem that autofs mounts will be monitored though, when the (real) filesystem is mounted.
98 lines
2.5 KiB
Go
98 lines
2.5 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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package collector
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import (
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"bufio"
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"os"
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"strings"
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"syscall"
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"github.com/prometheus/common/log"
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)
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const (
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defIgnoredMountPoints = "^/(sys|proc|dev)($|/)"
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defIgnoredFSTypes = "^(sys|proc|auto)fs$"
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ST_RDONLY = 0x1
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)
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type filesystemDetails struct {
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device string
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mountPoint string
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fsType string
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}
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// Expose filesystem fullness.
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func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
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mpds, err := mountPointDetails()
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if err != nil {
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return nil, err
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}
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stats = []filesystemStats{}
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for _, mpd := range mpds {
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if c.ignoredMountPointsPattern.MatchString(mpd.mountPoint) {
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log.Debugf("Ignoring mount point: %s", mpd.mountPoint)
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continue
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}
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if c.ignoredFSTypesPattern.MatchString(mpd.fsType) {
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log.Debugf("Ignoring fs type: %s", mpd.fsType)
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continue
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}
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buf := new(syscall.Statfs_t)
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err := syscall.Statfs(mpd.mountPoint, buf)
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if err != nil {
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log.Debugf("Statfs on %s returned %s",
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mpd.mountPoint, err)
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continue
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}
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var ro float64
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if buf.Flags&ST_RDONLY != 0 {
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ro = 1
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}
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labelValues := []string{mpd.device, mpd.mountPoint, mpd.fsType}
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stats = append(stats, filesystemStats{
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labelValues: labelValues,
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size: float64(buf.Blocks) * float64(buf.Bsize),
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free: float64(buf.Bfree) * float64(buf.Bsize),
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avail: float64(buf.Bavail) * float64(buf.Bsize),
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files: float64(buf.Files),
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filesFree: float64(buf.Ffree),
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ro: ro,
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})
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}
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return stats, nil
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}
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func mountPointDetails() ([]filesystemDetails, error) {
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file, err := os.Open(procFilePath("mounts"))
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if err != nil {
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return nil, err
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}
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defer file.Close()
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filesystems := []filesystemDetails{}
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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parts := strings.Fields(scanner.Text())
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filesystems = append(filesystems, filesystemDetails{parts[0], parts[1], parts[2]})
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}
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return filesystems, nil
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}
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