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30c2596512
Currently, we read from `/proc/diskstats` which is found to be un-reliable in k8s environments. We can read from `sysfs` instead. Also, cache the latest drive io stats to find the diff and update the metrics.
90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
//go:build (linux && arm) || (linux && 386)
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// +build linux,arm linux,386
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// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package disk
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import (
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"errors"
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"fmt"
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"strconv"
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"syscall"
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)
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// fsType2StringMap - list of filesystems supported on linux
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var fsType2StringMap = map[string]string{
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"1021994": "TMPFS",
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"137d": "EXT",
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"4244": "HFS",
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"4d44": "MSDOS",
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"52654973": "REISERFS",
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"5346544e": "NTFS",
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"58465342": "XFS",
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"61756673": "AUFS",
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"6969": "NFS",
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"ef51": "EXT2OLD",
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"ef53": "EXT4",
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"f15f": "ecryptfs",
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"794c7630": "overlayfs",
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"2fc12fc1": "zfs",
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"ff534d42": "cifs",
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"53464846": "wslfs",
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}
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// getFSType returns the filesystem type of the underlying mounted filesystem
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func getFSType(ftype int32) string {
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fsTypeHex := strconv.FormatInt(int64(ftype), 16)
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fsTypeString, ok := fsType2StringMap[fsTypeHex]
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if !ok {
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return "UNKNOWN"
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}
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return fsTypeString
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}
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// GetInfo returns total and free bytes available in a directory, e.g. `/`.
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func GetInfo(path string, _ bool) (info Info, err error) {
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s := syscall.Statfs_t{}
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err = syscall.Statfs(path, &s)
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if err != nil {
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return Info{}, err
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}
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reservedBlocks := s.Bfree - s.Bavail
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info = Info{
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Total: uint64(s.Frsize) * (s.Blocks - reservedBlocks),
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Free: uint64(s.Frsize) * s.Bavail,
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Files: s.Files,
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Ffree: s.Ffree,
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FSType: getFSType(s.Type),
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}
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// Check for overflows.
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// https://github.com/minio/minio/issues/8035
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// XFS can show wrong values at times error out
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// in such scenarios.
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if info.Free > info.Total {
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return info, fmt.Errorf("detected free space (%d) > total drive space (%d), fs corruption at (%s). please run 'fsck'", info.Free, info.Total, path)
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}
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info.Used = info.Total - info.Free
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return info, nil
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}
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// GetDriveStats returns IO stats of the drive by its major:minor
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func GetDriveStats(major, minor uint32) (iostats IOStats, err error) {
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return IOStats{}, errors.New("operation unsupported")
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}
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