ceph-csi/internal/rbd/rbd_util.go
Niels de Vos 526da43b6a rbd: remove unused rbdStatus()
Signed-off-by: Niels de Vos <ndevos@redhat.com>
2020-07-24 11:34:48 +00:00

1152 lines
33 KiB
Go

/*
Copyright 2018 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 rbd
import (
"context"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strconv"
"strings"
"time"
"github.com/ceph/ceph-csi/internal/util"
"github.com/ceph/go-ceph/rados"
librbd "github.com/ceph/go-ceph/rbd"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/golang/protobuf/ptypes"
"github.com/golang/protobuf/ptypes/timestamp"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/cloud-provider/volume/helpers"
klog "k8s.io/klog/v2"
)
const (
// The following three values are used for 30 seconds timeout
// while waiting for RBD Watcher to expire.
rbdImageWatcherInitDelay = 1 * time.Second
rbdImageWatcherFactor = 1.4
rbdImageWatcherSteps = 10
rbdDefaultMounter = "rbd"
// Output strings returned during invocation of "ceph rbd task add remove <imagespec>" when
// command is not supported by ceph manager. Used to check errors and recover when the command
// is unsupported.
rbdTaskRemoveCmdInvalidString1 = "no valid command found"
rbdTaskRemoveCmdInvalidString2 = "Error EINVAL: invalid command"
rbdTaskRemoveCmdAccessDeniedMessage = "Error EACCES:"
// Encryption statuses for RbdImage
rbdImageEncrypted = "encrypted"
rbdImageRequiresEncryption = "requiresEncryption"
// image metadata key for encryption
encryptionMetaKey = ".rbd.csi.ceph.com/encrypted"
)
// rbdVolume represents a CSI volume and its RBD image specifics.
type rbdVolume struct {
// RbdImageName is the name of the RBD image backing this rbdVolume. This does not have a
// JSON tag as it is not stashed in JSON encoded config maps in v1.0.0
// VolID is the volume ID that is exchanged with CSI drivers, identifying this rbdVol
// RequestName is the CSI generated volume name for the rbdVolume. This does not have a
// JSON tag as it is not stashed in JSON encoded config maps in v1.0.0
// VolName and MonValueFromSecret are retained from older plugin versions (<= 1.0.0)
// for backward compatibility reasons
// JournalPool is the ceph pool in which the CSI Journal is stored
// Pool is where the image journal and image is stored, and could be the same as `JournalPool`
// (retained as Pool instead of renaming to ImagePool or such, as this is referenced in the code extensively)
// DataPool is where the data for images in `Pool` are stored, this is used as the `--data-pool`
// argument when the pool is created, and is not used anywhere else
TopologyPools *[]util.TopologyConstrainedPool
TopologyRequirement *csi.TopologyRequirement
Topology map[string]string
RbdImageName string
NamePrefix string
VolID string `json:"volID"`
Monitors string `json:"monitors"`
JournalPool string
Pool string `json:"pool"`
DataPool string
ImageID string
ParentName string
imageFeatureSet librbd.FeatureSet
AdminID string `json:"adminId"`
UserID string `json:"userId"`
Mounter string `json:"mounter"`
ClusterID string `json:"clusterId"`
RequestName string
ReservedID string
VolName string `json:"volName"`
MonValueFromSecret string `json:"monValueFromSecret"`
VolSize int64 `json:"volSize"`
DisableInUseChecks bool `json:"disableInUseChecks"`
Encrypted bool
readOnly bool
KMS util.EncryptionKMS
CreatedAt *timestamp.Timestamp
// conn is a connection to the Ceph cluster obtained from a ConnPool
conn *util.ClusterConnection
// an opened IOContext, call .openIoctx() before using
ioctx *rados.IOContext
}
// rbdSnapshot represents a CSI snapshot and its RBD snapshot specifics.
type rbdSnapshot struct {
// SourceVolumeID is the volume ID of RbdImageName, that is exchanged with CSI drivers
// RbdImageName is the name of the RBD image, that is this rbdSnapshot's source image
// RbdSnapName is the name of the RBD snapshot backing this rbdSnapshot
// SnapID is the snapshot ID that is exchanged with CSI drivers, identifying this rbdSnapshot
// RequestName is the CSI generated snapshot name for the rbdSnapshot
// JournalPool is the ceph pool in which the CSI snapshot Journal is stored
// Pool is where the image snapshot journal and snapshot is stored, and could be the same as `JournalPool`
// ImageID contains the image id of cloned image
SourceVolumeID string
RbdImageName string
ReservedID string
NamePrefix string
RbdSnapName string
SnapID string
ImageID string
Monitors string
JournalPool string
Pool string
CreatedAt *timestamp.Timestamp
SizeBytes int64
ClusterID string
RequestName string
}
var (
supportedFeatures = sets.NewString(librbd.FeatureNameLayering)
)
// Connect an rbdVolume to the Ceph cluster.
func (rv *rbdVolume) Connect(cr *util.Credentials) error {
if rv.conn != nil {
return nil
}
conn := &util.ClusterConnection{}
if err := conn.Connect(rv.Monitors, cr); err != nil {
return err
}
rv.conn = conn
return nil
}
// Destroy cleans up the rbdVolume and closes the connection to the Ceph
// cluster in case one was setup.
func (rv *rbdVolume) Destroy() {
if rv.ioctx != nil {
rv.ioctx.Destroy()
}
if rv.conn != nil {
rv.conn.Destroy()
}
}
// String returns the image-spec (pool/image) format of the image.
func (rv *rbdVolume) String() string {
return fmt.Sprintf("%s/%s", rv.Pool, rv.RbdImageName)
}
// String returns the snap-spec (pool/image@snap) format of the snapshot.
func (rs *rbdSnapshot) String() string {
return fmt.Sprintf("%s/%s@%s", rs.Pool, rs.RbdImageName, rs.RbdSnapName)
}
// createImage creates a new ceph image with provision and volume options.
func createImage(ctx context.Context, pOpts *rbdVolume, cr *util.Credentials) error {
volSzMiB := fmt.Sprintf("%dM", util.RoundOffVolSize(pOpts.VolSize))
options := librbd.NewRbdImageOptions()
logMsg := "rbd: create %s size %s (features: %s) using mon %s"
if pOpts.DataPool != "" {
logMsg += fmt.Sprintf(", data pool %s", pOpts.DataPool)
err := options.SetString(librbd.RbdImageOptionDataPool, pOpts.DataPool)
if err != nil {
return fmt.Errorf("failed to set data pool: %w", err)
}
}
util.DebugLog(ctx, logMsg,
pOpts, volSzMiB, pOpts.imageFeatureSet.Names(), pOpts.Monitors)
if pOpts.imageFeatureSet != 0 {
err := options.SetUint64(librbd.RbdImageOptionFeatures, uint64(pOpts.imageFeatureSet))
if err != nil {
return fmt.Errorf("failed to set image features: %w", err)
}
}
err := pOpts.Connect(cr)
if err != nil {
return err
}
err = pOpts.openIoctx()
if err != nil {
return fmt.Errorf("failed to get IOContext: %w", err)
}
err = librbd.CreateImage(pOpts.ioctx, pOpts.RbdImageName,
uint64(util.RoundOffVolSize(pOpts.VolSize)*helpers.MiB), options)
if err != nil {
return fmt.Errorf("failed to create rbd image: %w", err)
}
return nil
}
func (rv *rbdVolume) openIoctx() error {
if rv.ioctx != nil {
return nil
}
ioctx, err := rv.conn.GetIoctx(rv.Pool)
if err != nil {
// GetIoctx() can return util.ErrPoolNotFound
return err
}
rv.ioctx = ioctx
return nil
}
// getImageID queries rbd about the given image and stores its id, returns
// ErrImageNotFound if provided image is not found.
func (rv *rbdVolume) getImageID() error {
if rv.ImageID != "" {
return nil
}
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
id, err := image.GetId()
if err != nil {
return err
}
rv.ImageID = id
return nil
}
// open the rbdVolume after it has been connected.
// ErrPoolNotFound or ErrImageNotFound are returned in case the pool or image
// can not be found, other errors will contain more details about other issues
// (permission denied, ...) and are expected to relate to configuration issues.
func (rv *rbdVolume) open() (*librbd.Image, error) {
err := rv.openIoctx()
if err != nil {
return nil, err
}
image, err := librbd.OpenImage(rv.ioctx, rv.RbdImageName, librbd.NoSnapshot)
if err != nil {
if errors.Is(err, librbd.ErrNotFound) {
err = util.JoinErrors(ErrImageNotFound, err)
}
return nil, err
}
return image, nil
}
// isInUse checks if there is a watcher on the image. It returns true if there
// is a watcher on the image, otherwise returns false.
func (rv *rbdVolume) isInUse() (bool, error) {
image, err := rv.open()
if err != nil {
if errors.Is(err, ErrImageNotFound) || errors.Is(err, util.ErrPoolNotFound) {
return false, err
}
// any error should assume something else is using the image
return true, err
}
defer image.Close()
watchers, err := image.ListWatchers()
if err != nil {
return false, err
}
// because we opened the image, there is at least one watcher
return len(watchers) != 1, nil
}
// addRbdManagerTask adds a ceph manager task to execute command
// asynchronously. If command is not found returns a bool set to false
// example arg ["trash", "remove","pool/image"].
func addRbdManagerTask(ctx context.Context, pOpts *rbdVolume, arg []string) (bool, error) {
var output []byte
args := []string{"rbd", "task", "add"}
args = append(args, arg...)
util.DebugLog(ctx, "executing %v for image (%s) using mon %s, pool %s", args, pOpts.RbdImageName, pOpts.Monitors, pOpts.Pool)
supported := true
output, err := execCommand("ceph", args)
if err != nil {
switch {
case strings.Contains(string(output), rbdTaskRemoveCmdInvalidString1) &&
strings.Contains(string(output), rbdTaskRemoveCmdInvalidString2):
klog.Warningf(util.Log(ctx, "cluster with cluster ID (%s) does not support Ceph manager based rbd commands (minimum ceph version required is v14.2.3)"), pOpts.ClusterID)
supported = false
case strings.HasPrefix(string(output), rbdTaskRemoveCmdAccessDeniedMessage):
klog.Warningf(util.Log(ctx, "access denied to Ceph MGR-based rbd commands on cluster ID (%s)"), pOpts.ClusterID)
supported = false
default:
klog.Warningf(util.Log(ctx, "uncaught error while scheduling a task: %s"), err)
}
}
return supported, err
}
// deleteImage deletes a ceph image with provision and volume options.
func deleteImage(ctx context.Context, pOpts *rbdVolume, cr *util.Credentials) error {
image := pOpts.RbdImageName
// Support deleting the older rbd images whose imageID is not stored in omap
err := pOpts.getImageID()
if err != nil {
return err
}
util.DebugLog(ctx, "rbd: delete %s using mon %s, pool %s", image, pOpts.Monitors, pOpts.Pool)
err = pOpts.openIoctx()
if err != nil {
return err
}
rbdImage := librbd.GetImage(pOpts.ioctx, image)
err = rbdImage.Trash(0)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to delete rbd image: %s, error: %v"), pOpts, err)
return err
}
// attempt to use Ceph manager based deletion support if available
args := []string{"trash", "remove",
pOpts.Pool + "/" + pOpts.ImageID,
"--id", cr.ID,
"--keyfile=" + cr.KeyFile,
"-m", pOpts.Monitors,
}
rbdCephMgrSupported, err := addRbdManagerTask(ctx, pOpts, args)
if rbdCephMgrSupported && err != nil {
klog.Errorf(util.Log(ctx, "failed to add task to delete rbd image: %s, %v"), pOpts, err)
return err
}
if !rbdCephMgrSupported {
err = librbd.TrashRemove(pOpts.ioctx, pOpts.ImageID, true)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to delete rbd image: %s, %v"), pOpts, err)
return err
}
}
return nil
}
func (rv *rbdVolume) getCloneDepth(ctx context.Context) (uint, error) {
var depth uint
vol := rbdVolume{
Pool: rv.Pool,
Monitors: rv.Monitors,
RbdImageName: rv.RbdImageName,
conn: rv.conn,
}
err := vol.openIoctx()
if err != nil {
return depth, err
}
defer func() {
vol.ioctx.Destroy()
}()
for {
if vol.RbdImageName == "" {
return depth, nil
}
err = vol.getImageInfo()
if err != nil {
// if the parent image is moved to trash the name will be present
// in rbd image info but the image will be in trash, in that case
// return the found depth
if errors.Is(err, ErrImageNotFound) {
return depth, nil
}
klog.Errorf(util.Log(ctx, "failed to check depth on image %s: %s"), vol, err)
return depth, err
}
if vol.ParentName != "" {
depth++
}
vol.RbdImageName = vol.ParentName
}
}
func flattenClonedRbdImages(ctx context.Context, snaps []snapshotInfo, pool, monitors string, cr *util.Credentials) error {
rv := &rbdVolume{
Monitors: monitors,
Pool: pool,
}
defer rv.Destroy()
err := rv.Connect(cr)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to open connection %s; err %v"), rv, err)
return err
}
for _, s := range snaps {
if s.Namespace.Type == "trash" {
rv.RbdImageName = s.Namespace.OriginalName
err = rv.flattenRbdImage(ctx, cr, true, rbdHardMaxCloneDepth, rbdSoftMaxCloneDepth)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to flatten %s; err %v"), rv, err)
continue
}
}
}
return nil
}
func (rv *rbdVolume) flattenRbdImage(ctx context.Context, cr *util.Credentials, forceFlatten bool, hardlimit, softlimit uint) error {
var depth uint
var err error
// skip clone depth check if request is for force flatten
if !forceFlatten {
depth, err = rv.getCloneDepth(ctx)
if err != nil {
return err
}
klog.Infof(util.Log(ctx, "clone depth is (%d), configured softlimit (%d) and hardlimit (%d) for %s"), depth, softlimit, hardlimit, rv)
}
if forceFlatten || (depth >= hardlimit) || (depth >= softlimit) {
args := []string{"flatten", rv.Pool + "/" + rv.RbdImageName, "--id", cr.ID, "--keyfile=" + cr.KeyFile, "-m", rv.Monitors}
supported, err := addRbdManagerTask(ctx, rv, args)
if supported {
if err != nil {
klog.Errorf(util.Log(ctx, "failed to add task flatten for %s : %v"), rv, err)
return err
}
if forceFlatten || depth >= hardlimit {
return fmt.Errorf("%w: flatten is in progress for image %s", ErrFlattenInProgress, rv.RbdImageName)
}
}
if !supported {
klog.Errorf(util.Log(ctx, "task manager does not support flatten,image will be flattened once hardlimit is reached: %v"), err)
if forceFlatten || depth >= hardlimit {
err = rv.Connect(cr)
if err != nil {
return err
}
rbdImage, err := rv.open()
if err != nil {
return err
}
defer rbdImage.Close()
if err = rbdImage.Flatten(); err != nil {
klog.Errorf(util.Log(ctx, "rbd failed to flatten image %s %s: %v"), rv.Pool, rv.RbdImageName, err)
return err
}
}
}
}
return nil
}
func (rv *rbdVolume) hasFeature(feature uint64) bool {
return (uint64(rv.imageFeatureSet) & feature) == feature
}
func (rv *rbdVolume) checkImageChainHasFeature(ctx context.Context, feature uint64) (bool, error) {
vol := rbdVolume{
Pool: rv.Pool,
Monitors: rv.Monitors,
RbdImageName: rv.RbdImageName,
conn: rv.conn,
}
err := vol.openIoctx()
if err != nil {
return false, err
}
defer vol.ioctx.Destroy()
for {
if vol.RbdImageName == "" {
return false, nil
}
err = vol.getImageInfo()
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get image info for %s: %s"), vol, err)
return false, err
}
if f := vol.hasFeature(feature); f {
return true, nil
}
vol.RbdImageName = vol.ParentName
}
}
// genSnapFromSnapID generates a rbdSnapshot structure from the provided identifier, updating
// the structure with elements from on-disk snapshot metadata as well.
func genSnapFromSnapID(ctx context.Context, rbdSnap *rbdSnapshot, snapshotID string, cr *util.Credentials) error {
var (
options map[string]string
vi util.CSIIdentifier
)
options = make(map[string]string)
rbdSnap.SnapID = snapshotID
err := vi.DecomposeCSIID(rbdSnap.SnapID)
if err != nil {
klog.Errorf(util.Log(ctx, "error decoding snapshot ID (%s) (%s)"), err, rbdSnap.SnapID)
return err
}
rbdSnap.ClusterID = vi.ClusterID
options["clusterID"] = rbdSnap.ClusterID
rbdSnap.Monitors, _, err = getMonsAndClusterID(ctx, options)
if err != nil {
return err
}
rbdSnap.Pool, err = util.GetPoolName(rbdSnap.Monitors, cr, vi.LocationID)
if err != nil {
return err
}
rbdSnap.JournalPool = rbdSnap.Pool
j, err := snapJournal.Connect(rbdSnap.Monitors, cr)
if err != nil {
return err
}
defer j.Destroy()
imageAttributes, err := j.GetImageAttributes(
ctx, rbdSnap.Pool, vi.ObjectUUID, true)
if err != nil {
return err
}
rbdSnap.ImageID = imageAttributes.ImageID
rbdSnap.RequestName = imageAttributes.RequestName
rbdSnap.RbdImageName = imageAttributes.SourceName
rbdSnap.RbdSnapName = imageAttributes.ImageName
rbdSnap.ReservedID = vi.ObjectUUID
// convert the journal pool ID to name, for use in DeleteSnapshot cases
if imageAttributes.JournalPoolID != util.InvalidPoolID {
rbdSnap.JournalPool, err = util.GetPoolName(rbdSnap.Monitors, cr, imageAttributes.JournalPoolID)
if err != nil {
// TODO: If pool is not found we may leak the image (as DeleteSnapshot will return success)
return err
}
}
return err
}
// genVolFromVolID generates a rbdVolume structure from the provided identifier, updating
// the structure with elements from on-disk image metadata as well.
func genVolFromVolID(ctx context.Context, volumeID string, cr *util.Credentials, secrets map[string]string) (*rbdVolume, error) {
var (
options map[string]string
vi util.CSIIdentifier
rbdVol *rbdVolume
)
options = make(map[string]string)
// rbdVolume fields that are not filled up in this function are:
// Mounter, MultiNodeWritable
rbdVol = &rbdVolume{VolID: volumeID}
err := vi.DecomposeCSIID(rbdVol.VolID)
if err != nil {
return rbdVol, fmt.Errorf("%w: error decoding volume ID (%s) (%s)",
ErrInvalidVolID, err, rbdVol.VolID)
}
rbdVol.ClusterID = vi.ClusterID
options["clusterID"] = rbdVol.ClusterID
rbdVol.Monitors, _, err = getMonsAndClusterID(ctx, options)
if err != nil {
return rbdVol, err
}
rbdVol.Pool, err = util.GetPoolName(rbdVol.Monitors, cr, vi.LocationID)
if err != nil {
return rbdVol, err
}
err = rbdVol.Connect(cr)
if err != nil {
return rbdVol, err
}
rbdVol.JournalPool = rbdVol.Pool
j, err := volJournal.Connect(rbdVol.Monitors, cr)
if err != nil {
return rbdVol, err
}
defer j.Destroy()
imageAttributes, err := j.GetImageAttributes(
ctx, rbdVol.Pool, vi.ObjectUUID, false)
if err != nil {
return rbdVol, err
}
rbdVol.RequestName = imageAttributes.RequestName
rbdVol.RbdImageName = imageAttributes.ImageName
rbdVol.ReservedID = vi.ObjectUUID
rbdVol.ImageID = imageAttributes.ImageID
if imageAttributes.KmsID != "" {
rbdVol.Encrypted = true
rbdVol.KMS, err = util.GetKMS(imageAttributes.KmsID, secrets)
if err != nil {
return rbdVol, err
}
}
// convert the journal pool ID to name, for use in DeleteVolume cases
if imageAttributes.JournalPoolID >= 0 {
rbdVol.JournalPool, err = util.GetPoolName(rbdVol.Monitors, cr, imageAttributes.JournalPoolID)
if err != nil {
// TODO: If pool is not found we may leak the image (as DeleteVolume will return success)
return rbdVol, err
}
}
if rbdVol.ImageID == "" {
err = rbdVol.getImageID()
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get image id %s: %v"), rbdVol, err)
return rbdVol, err
}
err = j.StoreImageID(ctx, rbdVol.JournalPool, rbdVol.ReservedID, rbdVol.ImageID, cr)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to store volume id %s: %v"), rbdVol, err)
return rbdVol, err
}
}
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get stored image id: %v"), err)
return rbdVol, err
}
err = rbdVol.getImageInfo()
return rbdVol, err
}
func execCommand(command string, args []string) ([]byte, error) {
// #nosec
cmd := exec.Command(command, args...)
return cmd.CombinedOutput()
}
func getMonsAndClusterID(ctx context.Context, options map[string]string) (monitors, clusterID string, err error) {
var ok bool
if clusterID, ok = options["clusterID"]; !ok {
err = errors.New("clusterID must be set")
return
}
if monitors, err = util.Mons(csiConfigFile, clusterID); err != nil {
klog.Errorf(util.Log(ctx, "failed getting mons (%s)"), err)
err = fmt.Errorf("failed to fetch monitor list using clusterID (%s): %w", clusterID, err)
return
}
return
}
func genVolFromVolumeOptions(ctx context.Context, volOptions, credentials map[string]string, disableInUseChecks bool) (*rbdVolume, error) {
var (
ok bool
err error
namePrefix string
encrypted string
)
rbdVol := &rbdVolume{}
rbdVol.Pool, ok = volOptions["pool"]
if !ok {
return nil, errors.New("missing required parameter pool")
}
rbdVol.DataPool = volOptions["dataPool"]
if namePrefix, ok = volOptions["volumeNamePrefix"]; ok {
rbdVol.NamePrefix = namePrefix
}
rbdVol.Monitors, rbdVol.ClusterID, err = getMonsAndClusterID(ctx, volOptions)
if err != nil {
return nil, err
}
// if no image features is provided, it results in empty string
// which disable all RBD image features as we expected
imageFeatures, found := volOptions["imageFeatures"]
if found {
arr := strings.Split(imageFeatures, ",")
for _, f := range arr {
if !supportedFeatures.Has(f) {
return nil, fmt.Errorf("invalid feature %q for volume csi-rbdplugin, supported"+
" features are: %v", f, supportedFeatures)
}
}
rbdVol.imageFeatureSet = librbd.FeatureSetFromNames(arr)
}
util.ExtendedLog(ctx, "setting disableInUseChecks on rbd volume to: %v", disableInUseChecks)
rbdVol.DisableInUseChecks = disableInUseChecks
rbdVol.Mounter, ok = volOptions["mounter"]
if !ok {
rbdVol.Mounter = rbdDefaultMounter
}
rbdVol.Encrypted = false
encrypted, ok = volOptions["encrypted"]
if ok {
rbdVol.Encrypted, err = strconv.ParseBool(encrypted)
if err != nil {
return nil, fmt.Errorf(
"invalid value set in 'encrypted': %s (should be \"true\" or \"false\")", encrypted)
}
if rbdVol.Encrypted {
// deliberately ignore if parsing failed as GetKMS will return default
// implementation of kmsID is empty
kmsID := volOptions["encryptionKMSID"]
rbdVol.KMS, err = util.GetKMS(kmsID, credentials)
if err != nil {
return nil, fmt.Errorf("invalid encryption kms configuration: %s", err)
}
}
}
return rbdVol, nil
}
func genSnapFromOptions(ctx context.Context, rbdVol *rbdVolume, snapOptions map[string]string) *rbdSnapshot {
var err error
rbdSnap := &rbdSnapshot{}
rbdSnap.Pool = rbdVol.Pool
rbdSnap.JournalPool = rbdVol.JournalPool
rbdSnap.Monitors, rbdSnap.ClusterID, err = getMonsAndClusterID(ctx, snapOptions)
if err != nil {
rbdSnap.Monitors = rbdVol.Monitors
rbdSnap.ClusterID = rbdVol.ClusterID
}
if namePrefix, ok := snapOptions["snapshotNamePrefix"]; ok {
rbdSnap.NamePrefix = namePrefix
}
return rbdSnap
}
// hasSnapshotFeature checks if Layering is enabled for this image.
func (rv *rbdVolume) hasSnapshotFeature() bool {
return (uint64(rv.imageFeatureSet) & librbd.FeatureLayering) == librbd.FeatureLayering
}
func (rv *rbdVolume) createSnapshot(ctx context.Context, pOpts *rbdSnapshot) error {
util.DebugLog(ctx, "rbd: snap create %s using mon %s", pOpts, pOpts.Monitors)
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
_, err = image.CreateSnapshot(pOpts.RbdSnapName)
return err
}
func (rv *rbdVolume) deleteSnapshot(ctx context.Context, pOpts *rbdSnapshot) error {
util.DebugLog(ctx, "rbd: snap rm %s using mon %s", pOpts, pOpts.Monitors)
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
snap := image.GetSnapshot(pOpts.RbdSnapName)
if snap == nil {
return fmt.Errorf("snapshot value is nil for %s", pOpts.RbdSnapName)
}
err = snap.Remove()
if errors.Is(err, librbd.ErrNotFound) {
return util.JoinErrors(ErrSnapNotFound, err)
}
return err
}
func (rv *rbdVolume) cloneRbdImageFromSnapshot(ctx context.Context, pSnapOpts *rbdSnapshot) error {
image := rv.RbdImageName
var err error
logMsg := "rbd: clone %s %s (features: %s) using mon %s"
options := librbd.NewRbdImageOptions()
defer options.Destroy()
if rv.DataPool != "" {
logMsg += fmt.Sprintf(", data pool %s", rv.DataPool)
err = options.SetString(librbd.RbdImageOptionDataPool, rv.DataPool)
if err != nil {
return fmt.Errorf("failed to set data pool: %w", err)
}
}
util.DebugLog(ctx, logMsg,
pSnapOpts, image, rv.imageFeatureSet.Names(), rv.Monitors)
if rv.imageFeatureSet != 0 {
err = options.SetUint64(librbd.RbdImageOptionFeatures, uint64(rv.imageFeatureSet))
if err != nil {
return fmt.Errorf("failed to set image features: %w", err)
}
}
err = options.SetUint64(librbd.ImageOptionCloneFormat, 2)
if err != nil {
return fmt.Errorf("failed to set image features: %w", err)
}
err = rv.openIoctx()
if err != nil {
return fmt.Errorf("failed to get IOContext: %w", err)
}
err = librbd.CloneImage(rv.ioctx, pSnapOpts.RbdImageName, pSnapOpts.RbdSnapName, rv.ioctx, rv.RbdImageName, options)
if err != nil {
return fmt.Errorf("failed to create rbd clone: %w", err)
}
return nil
}
// imageInfo strongly typed JSON spec for image info.
type imageInfo struct {
ObjectUUID string `json:"name"`
Size int64 `json:"size"`
Features []string `json:"features"`
CreatedAt string `json:"create_timestamp"`
Parent parentInfo `json:"parent"`
}
// parentInfo spec for parent volume info.
type parentInfo struct {
Image string `json:"image"`
Pool string `json:"pool"`
Snapshot string `json:"snapshost"`
}
// updateVolWithImageInfo updates provided rbdVolume with information from on-disk data
// regarding the same.
func (rv *rbdVolume) updateVolWithImageInfo(cr *util.Credentials) error {
// rbd --format=json info [image-spec | snap-spec]
var imgInfo imageInfo
stdout, stderr, err := util.ExecCommand("rbd",
"-m", rv.Monitors,
"--id", cr.ID,
"--keyfile="+cr.KeyFile,
"-c", util.CephConfigPath,
"--format="+"json",
"info", rv.String())
if err != nil {
klog.Errorf("failed getting information for image (%s): (%s)", rv, err)
if strings.Contains(string(stderr), "rbd: error opening image "+rv.RbdImageName+
": (2) No such file or directory") {
return util.JoinErrors(ErrImageNotFound, err)
}
return err
}
err = json.Unmarshal(stdout, &imgInfo)
if err != nil {
klog.Errorf("failed to parse JSON output of image info (%s): (%s)", rv, err)
return fmt.Errorf("unmarshal failed: %+v. raw buffer response: %s", err, string(stdout))
}
rv.VolSize = imgInfo.Size
rv.ParentName = imgInfo.Parent.Image
tm, err := time.Parse(time.ANSIC, imgInfo.CreatedAt)
if err != nil {
return err
}
rv.CreatedAt, err = ptypes.TimestampProto(tm)
return err
}
// getImageInfo queries rbd about the given image and returns its metadata, and returns
// ErrImageNotFound if provided image is not found.
func (rv *rbdVolume) getImageInfo() error {
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
imageInfo, err := image.Stat()
if err != nil {
return err
}
// TODO: can rv.VolSize not be a uint64? Or initialize it to -1?
rv.VolSize = int64(imageInfo.Size)
features, err := image.GetFeatures()
if err != nil {
return err
}
rv.imageFeatureSet = librbd.FeatureSet(features)
err = rv.updateVolWithImageInfo(rv.conn.Creds)
if err != nil {
return err
}
return nil
}
/*
checkSnapExists queries rbd about the snapshots of the given image and returns
ErrImageNotFound if provided image is not found, and ErrSnapNotFound if
provided snap is not found in the images snapshot list.
*/
func (rv *rbdVolume) checkSnapExists(rbdSnap *rbdSnapshot) error {
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
snaps, err := image.GetSnapshotNames()
if err != nil {
return err
}
for _, snap := range snaps {
if snap.Name == rbdSnap.RbdSnapName {
return nil
}
}
return fmt.Errorf("%w: snap %s not found", ErrSnapNotFound, rbdSnap.String())
}
// rbdImageMetadataStash strongly typed JSON spec for stashed RBD image metadata.
type rbdImageMetadataStash struct {
Version int `json:"Version"`
Pool string `json:"pool"`
ImageName string `json:"image"`
NbdAccess bool `json:"accessType"`
Encrypted bool `json:"encrypted"`
}
// file name in which image metadata is stashed.
const stashFileName = "image-meta.json"
// spec returns the image-spec (pool/image) format of the image.
func (ri *rbdImageMetadataStash) String() string {
return fmt.Sprintf("%s/%s", ri.Pool, ri.ImageName)
}
// stashRBDImageMetadata stashes required fields into the stashFileName at the passed in path, in
// JSON format.
func stashRBDImageMetadata(volOptions *rbdVolume, path string) error {
var imgMeta = rbdImageMetadataStash{
// there are no checks for this at present
Version: 2, // nolint:gomnd // number specifies version.
Pool: volOptions.Pool,
ImageName: volOptions.RbdImageName,
Encrypted: volOptions.Encrypted,
}
imgMeta.NbdAccess = false
if volOptions.Mounter == rbdTonbd && hasNBD {
imgMeta.NbdAccess = true
}
encodedBytes, err := json.Marshal(imgMeta)
if err != nil {
return fmt.Errorf("failed to marshall JSON image metadata for image (%s): (%v)", volOptions, err)
}
fPath := filepath.Join(path, stashFileName)
err = ioutil.WriteFile(fPath, encodedBytes, 0600)
if err != nil {
return fmt.Errorf("failed to stash JSON image metadata for image (%s) at path (%s): (%v)", volOptions, fPath, err)
}
return nil
}
// lookupRBDImageMetadataStash reads and returns stashed image metadata at passed in path.
func lookupRBDImageMetadataStash(path string) (rbdImageMetadataStash, error) {
var imgMeta rbdImageMetadataStash
fPath := filepath.Join(path, stashFileName)
encodedBytes, err := ioutil.ReadFile(fPath) // #nosec - intended reading from fPath
if err != nil {
if !os.IsNotExist(err) {
return imgMeta, fmt.Errorf("failed to read stashed JSON image metadata from path (%s): (%v)", fPath, err)
}
return imgMeta, util.JoinErrors(ErrMissingStash, err)
}
err = json.Unmarshal(encodedBytes, &imgMeta)
if err != nil {
return imgMeta, fmt.Errorf("failed to unmarshall stashed JSON image metadata from path (%s): (%v)", fPath, err)
}
return imgMeta, nil
}
// cleanupRBDImageMetadataStash cleans up any stashed metadata at passed in path.
func cleanupRBDImageMetadataStash(path string) error {
fPath := filepath.Join(path, stashFileName)
if err := os.Remove(fPath); err != nil {
return fmt.Errorf("failed to cleanup stashed JSON data (%s): (%v)", fPath, err)
}
return nil
}
// resizeRBDImage resizes the given volume to new size.
func resizeRBDImage(rbdVol *rbdVolume, cr *util.Credentials) error {
var output []byte
mon := rbdVol.Monitors
volSzMiB := fmt.Sprintf("%dM", util.RoundOffVolSize(rbdVol.VolSize))
args := []string{"resize", rbdVol.String(), "--size", volSzMiB, "--id", cr.ID, "-m", mon, "--keyfile=" + cr.KeyFile}
output, err := execCommand("rbd", args)
if err != nil {
return fmt.Errorf("failed to resize rbd image (%w), command output: %s", err, string(output))
}
return nil
}
func (rv *rbdVolume) GetMetadata(key string) (string, error) {
image, err := rv.open()
if err != nil {
return "", err
}
defer image.Close()
return image.GetMetadata(key)
}
func (rv *rbdVolume) SetMetadata(key, value string) error {
image, err := rv.open()
if err != nil {
return err
}
defer image.Close()
return image.SetMetadata(key, value)
}
// checkRbdImageEncrypted verifies if rbd image was encrypted when created.
func (rv *rbdVolume) checkRbdImageEncrypted(ctx context.Context) (string, error) {
value, err := rv.GetMetadata(encryptionMetaKey)
if err != nil {
klog.Errorf(util.Log(ctx, "checking image %s encrypted state metadata failed: %s"), rv, err)
return "", err
}
encrypted := strings.TrimSpace(value)
util.DebugLog(ctx, "image %s encrypted state metadata reports %q", rv, encrypted)
return encrypted, nil
}
func (rv *rbdVolume) ensureEncryptionMetadataSet(status string) error {
err := rv.SetMetadata(encryptionMetaKey, status)
if err != nil {
return fmt.Errorf("failed to save encryption status for %s: %v", rv, err)
}
return nil
}
// SnapshotInfo holds snapshots details.
type snapshotInfo struct {
ID int `json:"id"`
Name string `json:"name"`
Size int64 `json:"size"`
Protected string `json:"protected"`
Timestamp string `json:"timestamp"`
Namespace struct {
Type string `json:"type"`
OriginalName string `json:"original_name"`
} `json:"namespace"`
}
// TODO: use go-ceph once https://github.com/ceph/go-ceph/issues/300 is available in a release.
func (rv *rbdVolume) listSnapshots(ctx context.Context, cr *util.Credentials) ([]snapshotInfo, error) {
// rbd snap ls <image> --pool=<pool-name> --all --format=json
var snapInfo []snapshotInfo
stdout, stderr, err := util.ExecCommand("rbd",
"-m", rv.Monitors,
"--id", cr.ID,
"--keyfile="+cr.KeyFile,
"-c", util.CephConfigPath,
"--format="+"json",
"snap",
"ls",
"--all", rv.String())
if err != nil {
klog.Errorf(util.Log(ctx, "failed getting information for image (%s): (%s)"), rv, err)
if strings.Contains(string(stderr), "rbd: error opening image "+rv.RbdImageName+
": (2) No such file or directory") {
return snapInfo, util.JoinErrors(ErrImageNotFound, err)
}
return snapInfo, err
}
err = json.Unmarshal(stdout, &snapInfo)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to parse JSON output of snapshot info (%s)"), err)
return snapInfo, fmt.Errorf("unmarshal failed: %w. raw buffer response: %s", err, string(stdout))
}
return snapInfo, nil
}