mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-26 08:10:20 +00:00
331 lines
10 KiB
Go
331 lines
10 KiB
Go
/*
|
|
Copyright 2019 The Ceph-CSI 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.
|
|
*/
|
|
|
|
package cephfs
|
|
|
|
import (
|
|
"context"
|
|
"encoding/base64"
|
|
"os"
|
|
"sync"
|
|
"syscall"
|
|
"time"
|
|
|
|
"github.com/ceph/ceph-csi/pkg/util"
|
|
"github.com/pkg/errors"
|
|
"k8s.io/klog"
|
|
)
|
|
|
|
type volumeMountCacheEntry struct {
|
|
DriverVersion string `json:"driverVersion"`
|
|
|
|
VolumeID string `json:"volumeID"`
|
|
Mounter string `json:"mounter"`
|
|
Secrets map[string]string `json:"secrets"`
|
|
StagingPath string `json:"stagingPath"`
|
|
TargetPaths map[string]bool `json:"targetPaths"`
|
|
CreateTime time.Time `json:"createTime"`
|
|
}
|
|
|
|
type volumeMountCacheMap struct {
|
|
volumes map[string]volumeMountCacheEntry
|
|
nodeCacheStore util.NodeCache
|
|
}
|
|
|
|
var (
|
|
volumeMountCachePrefix = "cephfs-mount-cache-"
|
|
volumeMountCache volumeMountCacheMap
|
|
volumeMountCacheMtx sync.Mutex
|
|
)
|
|
|
|
func initVolumeMountCache(driverName, mountCacheDir string) {
|
|
volumeMountCache.volumes = make(map[string]volumeMountCacheEntry)
|
|
|
|
volumeMountCache.nodeCacheStore.BasePath = mountCacheDir
|
|
volumeMountCache.nodeCacheStore.CacheDir = driverName
|
|
klog.Infof("mount-cache: name: %s, version: %s, mountCacheDir: %s", driverName, util.DriverVersion, mountCacheDir)
|
|
}
|
|
|
|
func remountCachedVolumes() error {
|
|
if err := util.CreateMountPoint(volumeMountCache.nodeCacheStore.BasePath); err != nil {
|
|
klog.Errorf("mount-cache: failed to create %s: %v", volumeMountCache.nodeCacheStore.BasePath, err)
|
|
return err
|
|
}
|
|
var remountFailCount, remountSuccCount int64
|
|
me := &volumeMountCacheEntry{}
|
|
err := volumeMountCache.nodeCacheStore.ForAll(volumeMountCachePrefix, me, func(identifier string) error {
|
|
volID := me.VolumeID
|
|
if volOpts, vid, err := newVolumeOptionsFromVolID(context.TODO(), me.VolumeID, nil, decodeCredentials(me.Secrets)); err != nil {
|
|
if err, ok := err.(util.ErrKeyNotFound); ok {
|
|
klog.Infof("mount-cache: image key not found, assuming the volume %s to be already deleted (%v)", volID, err)
|
|
if err := volumeMountCache.nodeCacheStore.Delete(genVolumeMountCacheFileName(volID)); err == nil {
|
|
klog.Infof("mount-cache: metadata not found, delete volume cache entry for volume %s", volID)
|
|
}
|
|
}
|
|
} else {
|
|
// update Mounter from mount cache
|
|
volOpts.Mounter = me.Mounter
|
|
if err := mountOneCacheEntry(volOpts, vid, me); err == nil {
|
|
remountSuccCount++
|
|
volumeMountCache.volumes[me.VolumeID] = *me
|
|
klog.Infof("mount-cache: successfully remounted volume %s", volID)
|
|
} else {
|
|
remountFailCount++
|
|
klog.Errorf("mount-cache: failed to remount volume %s", volID)
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
if err != nil {
|
|
klog.Infof("mount-cache: metastore list cache fail %v", err)
|
|
return err
|
|
}
|
|
if remountFailCount > 0 {
|
|
klog.Infof("mount-cache: successfully remounted %d volumes, failed to remount %d volumes", remountSuccCount, remountFailCount)
|
|
} else {
|
|
klog.Infof("mount-cache: successfully remounted %d volumes", remountSuccCount)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func mountOneCacheEntry(volOptions *volumeOptions, vid *volumeIdentifier, me *volumeMountCacheEntry) error {
|
|
volumeMountCacheMtx.Lock()
|
|
defer volumeMountCacheMtx.Unlock()
|
|
|
|
var (
|
|
err error
|
|
cr *util.Credentials
|
|
)
|
|
volID := vid.VolumeID
|
|
|
|
if volOptions.ProvisionVolume {
|
|
cr, err = util.NewAdminCredentials(decodeCredentials(me.Secrets))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer cr.DeleteCredentials()
|
|
|
|
volOptions.RootPath, err = getVolumeRootPathCeph(context.TODO(), volOptions, cr, volumeID(vid.FsSubvolName))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
cr, err = util.NewUserCredentials(decodeCredentials(me.Secrets))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer cr.DeleteCredentials()
|
|
}
|
|
|
|
err = cleanupMountPoint(me.StagingPath)
|
|
if err != nil {
|
|
klog.Infof("mount-cache: failed to cleanup volume mount point %s, remove it: %s %v", volID, me.StagingPath, err)
|
|
return err
|
|
}
|
|
|
|
isMnt, err := util.IsMountPoint(me.StagingPath)
|
|
if err != nil {
|
|
isMnt = false
|
|
klog.Infof("mount-cache: failed to check volume mounted %s: %s %v", volID, me.StagingPath, err)
|
|
}
|
|
|
|
if !isMnt {
|
|
m, err := newMounter(volOptions)
|
|
if err != nil {
|
|
klog.Errorf("mount-cache: failed to create mounter for volume %s: %v", volID, err)
|
|
return err
|
|
}
|
|
if err := m.mount(context.TODO(), me.StagingPath, cr, volOptions); err != nil {
|
|
klog.Errorf("mount-cache: failed to mount volume %s: %v", volID, err)
|
|
return err
|
|
}
|
|
}
|
|
|
|
mountOptions := []string{"bind"}
|
|
for targetPath, readOnly := range me.TargetPaths {
|
|
if err := cleanupMountPoint(targetPath); err == nil {
|
|
if err := bindMount(context.TODO(), me.StagingPath, targetPath, readOnly, mountOptions); err != nil {
|
|
klog.Errorf("mount-cache: failed to bind-mount volume %s: %s %s %v %v",
|
|
volID, me.StagingPath, targetPath, readOnly, err)
|
|
} else {
|
|
klog.Infof("mount-cache: successfully bind-mounted volume %s: %s %s %v",
|
|
volID, me.StagingPath, targetPath, readOnly)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func cleanupMountPoint(mountPoint string) error {
|
|
if _, err := os.Stat(mountPoint); err != nil {
|
|
if isCorruptedMnt(err) {
|
|
klog.Infof("mount-cache: corrupted mount point %s, need unmount", mountPoint)
|
|
err := execCommandErr(context.TODO(), "umount", mountPoint)
|
|
if err != nil {
|
|
klog.Infof("mount-cache: failed to umount %s %v", mountPoint, err)
|
|
// ignore error return err
|
|
}
|
|
}
|
|
}
|
|
if _, err := os.Stat(mountPoint); err != nil {
|
|
klog.Errorf("mount-cache: failed to stat mount point %s %v", mountPoint, err)
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func isCorruptedMnt(err error) bool {
|
|
var underlyingError error
|
|
switch pe := err.(type) {
|
|
case nil:
|
|
return false
|
|
case *os.PathError:
|
|
underlyingError = pe.Err
|
|
case *os.LinkError:
|
|
underlyingError = pe.Err
|
|
case *os.SyscallError:
|
|
underlyingError = pe.Err
|
|
default:
|
|
return false
|
|
}
|
|
|
|
CorruptedErrors := []error{
|
|
syscall.ENOTCONN, syscall.ESTALE, syscall.EIO, syscall.EACCES}
|
|
|
|
for _, v := range CorruptedErrors {
|
|
if underlyingError == v {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func genVolumeMountCacheFileName(volID string) string {
|
|
cachePath := volumeMountCachePrefix + volID
|
|
return cachePath
|
|
}
|
|
func (mc *volumeMountCacheMap) isEnable() bool {
|
|
// if mount cache dir unset, disable state
|
|
return mc.nodeCacheStore.BasePath != ""
|
|
}
|
|
|
|
func (mc *volumeMountCacheMap) nodeStageVolume(ctx context.Context, volID, stagingTargetPath, mounter string, secrets map[string]string) error {
|
|
if !mc.isEnable() {
|
|
return nil
|
|
}
|
|
volumeMountCacheMtx.Lock()
|
|
defer volumeMountCacheMtx.Unlock()
|
|
|
|
lastTargetPaths := make(map[string]bool)
|
|
me, ok := volumeMountCache.volumes[volID]
|
|
if ok {
|
|
if me.StagingPath == stagingTargetPath {
|
|
klog.Warningf(util.Log(ctx, "mount-cache: node unexpected restage volume for volume %s"), volID)
|
|
return nil
|
|
}
|
|
lastTargetPaths = me.TargetPaths
|
|
klog.Warningf(util.Log(ctx, "mount-cache: node stage volume ignore last cache entry for volume %s"), volID)
|
|
}
|
|
|
|
me = volumeMountCacheEntry{DriverVersion: util.DriverVersion}
|
|
|
|
me.VolumeID = volID
|
|
me.Secrets = encodeCredentials(secrets)
|
|
me.StagingPath = stagingTargetPath
|
|
me.TargetPaths = lastTargetPaths
|
|
me.Mounter = mounter
|
|
|
|
me.CreateTime = time.Now()
|
|
volumeMountCache.volumes[volID] = me
|
|
return mc.nodeCacheStore.Create(genVolumeMountCacheFileName(volID), me)
|
|
}
|
|
|
|
func (mc *volumeMountCacheMap) nodeUnStageVolume(volID string) error {
|
|
if !mc.isEnable() {
|
|
return nil
|
|
}
|
|
volumeMountCacheMtx.Lock()
|
|
defer volumeMountCacheMtx.Unlock()
|
|
delete(volumeMountCache.volumes, volID)
|
|
return mc.nodeCacheStore.Delete(genVolumeMountCacheFileName(volID))
|
|
}
|
|
|
|
func (mc *volumeMountCacheMap) nodePublishVolume(ctx context.Context, volID, targetPath string, readOnly bool) error {
|
|
if !mc.isEnable() {
|
|
return nil
|
|
}
|
|
volumeMountCacheMtx.Lock()
|
|
defer volumeMountCacheMtx.Unlock()
|
|
|
|
_, ok := volumeMountCache.volumes[volID]
|
|
if !ok {
|
|
return errors.New("mount-cache: node publish volume failed to find cache entry for volume")
|
|
}
|
|
volumeMountCache.volumes[volID].TargetPaths[targetPath] = readOnly
|
|
return mc.updateNodeCache(ctx, volID)
|
|
}
|
|
|
|
func (mc *volumeMountCacheMap) nodeUnPublishVolume(ctx context.Context, volID, targetPath string) error {
|
|
if !mc.isEnable() {
|
|
return nil
|
|
}
|
|
volumeMountCacheMtx.Lock()
|
|
defer volumeMountCacheMtx.Unlock()
|
|
|
|
_, ok := volumeMountCache.volumes[volID]
|
|
if !ok {
|
|
return errors.New("mount-cache: node unpublish volume failed to find cache entry for volume")
|
|
}
|
|
delete(volumeMountCache.volumes[volID].TargetPaths, targetPath)
|
|
return mc.updateNodeCache(ctx, volID)
|
|
}
|
|
|
|
func (mc *volumeMountCacheMap) updateNodeCache(ctx context.Context, volID string) error {
|
|
me := volumeMountCache.volumes[volID]
|
|
if err := volumeMountCache.nodeCacheStore.Delete(genVolumeMountCacheFileName(volID)); err == nil {
|
|
klog.Infof(util.Log(ctx, "mount-cache: metadata not found, delete mount cache failed for volume %s"), volID)
|
|
}
|
|
return mc.nodeCacheStore.Create(genVolumeMountCacheFileName(volID), me)
|
|
}
|
|
|
|
func encodeCredentials(input map[string]string) (output map[string]string) {
|
|
output = make(map[string]string)
|
|
for key, value := range input {
|
|
nKey := base64.StdEncoding.EncodeToString([]byte(key))
|
|
nValue := base64.StdEncoding.EncodeToString([]byte(value))
|
|
output[nKey] = nValue
|
|
}
|
|
return output
|
|
}
|
|
|
|
func decodeCredentials(input map[string]string) (output map[string]string) {
|
|
output = make(map[string]string)
|
|
for key, value := range input {
|
|
nKey, err := base64.StdEncoding.DecodeString(key)
|
|
if err != nil {
|
|
klog.Errorf("mount-cache: decode secret fail")
|
|
continue
|
|
}
|
|
nValue, err := base64.StdEncoding.DecodeString(value)
|
|
if err != nil {
|
|
klog.Errorf("mount-cache: decode secret fail")
|
|
continue
|
|
}
|
|
output[string(nKey)] = string(nValue)
|
|
}
|
|
return output
|
|
}
|