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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build !nofilesystem
package collector
import (
"bufio"
"os"
"strings"
"syscall"
"github.com/prometheus/common/log"
)
const (
defIgnoredMountPoints = "^/(sys|proc|dev)($|/)"
defIgnoredFSTypes = "^(sys|proc)fs$"
ST_RDONLY = 0x1
)
type filesystemDetails struct {
device string
mountPoint string
fsType string
}
// Expose filesystem fullness.
func (c *filesystemCollector) GetStats() (stats []filesystemStats, err error) {
mpds, err := mountPointDetails()
if err != nil {
return nil, err
}
stats = []filesystemStats{}
for _, mpd := range mpds {
if c.ignoredMountPointsPattern.MatchString(mpd.mountPoint) {
log.Debugf("Ignoring mount point: %s", mpd.mountPoint)
continue
}
if c.ignoredFSTypesPattern.MatchString(mpd.fsType) {
log.Debugf("Ignoring fs type: %s", mpd.fsType)
continue
}
buf := new(syscall.Statfs_t)
err := syscall.Statfs(mpd.mountPoint, buf)
if err != nil {
log.Debugf("Statfs on %s returned %s",
mpd.mountPoint, err)
continue
}
var ro float64
if buf.Flags&ST_RDONLY != 0 {
ro = 1
}
labelValues := []string{mpd.device, mpd.mountPoint, mpd.fsType}
stats = append(stats, filesystemStats{
labelValues: labelValues,
size: float64(buf.Blocks) * float64(buf.Bsize),
free: float64(buf.Bfree) * float64(buf.Bsize),
avail: float64(buf.Bavail) * float64(buf.Bsize),
files: float64(buf.Files),
filesFree: float64(buf.Ffree),
ro: ro,
})
}
return stats, nil
}
func mountPointDetails() ([]filesystemDetails, error) {
file, err := os.Open(procFilePath("mounts"))
if err != nil {
return nil, err
}
defer file.Close()
filesystems := []filesystemDetails{}
scanner := bufio.NewScanner(file)
for scanner.Scan() {
parts := strings.Fields(scanner.Text())
filesystems = append(filesystems, filesystemDetails{parts[0], parts[1], parts[2]})
}
return filesystems, nil
}
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