Method GetStats

metric/filesystem_linux.go:34–77

GetStats returns filesystem stats.

()

// GetStats returns filesystem stats.
func (c *filesystemCollector) GetStats() ([]filesystemStats, error) {
	mps, err := mountPointDetails()
	if err != nil {
		return nil, err
	}
	stats := []filesystemStats{}
	for _, labels := range mps {
		if c.ignoredMountPointsPattern.MatchString(labels.mountPoint) {
			log.Debugf("ignoring mount point: %s", labels.mountPoint)
			continue
		}
		if c.ignoredFSTypesPattern.MatchString(labels.fsType) {
			log.Debugf("ignoring fs type: %s", labels.fsType)
			continue
		}

		buf := new(syscall.Statfs_t)
		err := syscall.Statfs(labels.mountPoint, buf)
		if err != nil {
			stats = append(stats, filesystemStats{
				labels:      labels,
				deviceError: 1,
			})
			log.Debugf("error on statfs() system call for %q: %s", labels.mountPoint, err)
			continue
		}

		var ro float64
		if (buf.Flags & readOnly) != 0 {
			ro = 1
		}

		stats = append(stats, filesystemStats{
			labels:    labels,
			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() ([]filesystemLabels, error) {
	file, err := os.Open(procFilePath("mounts"))