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rbd/go-ceph: add GetMetadata() and GetMetadata() functions

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Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos 2020-01-09 11:31:07 +01:00 committed by mergify[bot]
parent ea51b04017
commit f814bd72e5
4 changed files with 66 additions and 50 deletions
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4
internal/rbd/controllerserver.go
View File

@ -172,7 +172,7 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
}
if found {
if rbdVol.Encrypted {
err = ensureEncryptionMetadataSet(ctx, cr, rbdVol)
err = rbdVol.ensureEncryptionMetadataSet(rbdImageRequiresEncryption)
if err != nil {
klog.Errorf(util.Log(ctx, err.Error()))
return nil, err
@ -224,7 +224,7 @@ func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVol
}
if rbdVol.Encrypted {
err = ensureEncryptionMetadataSet(ctx, cr, rbdVol)
err = rbdVol.ensureEncryptionMetadataSet(rbdImageRequiresEncryption)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to save encryption status, deleting image %s"),
rbdVol.RbdImageName)

29
internal/rbd/nodeserver.go
View File

@ -202,6 +202,13 @@ func (ns *NodeServer) stageTransaction(ctx context.Context, req *csi.NodeStageVo
}
defer cr.DeleteCredentials()
err = volOptions.Connect(cr)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to connect to volume %v: %v"), volOptions.RbdImageName, err)
return transaction, err
}
defer volOptions.Destroy()
// Mapping RBD image
var devicePath string
devicePath, err = attachRBDImage(ctx, volOptions, cr)
@ -213,7 +220,7 @@ func (ns *NodeServer) stageTransaction(ctx context.Context, req *csi.NodeStageVo
req.GetVolumeId(), volOptions.Pool, devicePath)
if volOptions.Encrypted {
devicePath, err = ns.processEncryptedDevice(ctx, volOptions, devicePath, cr)
devicePath, err = ns.processEncryptedDevice(ctx, volOptions, devicePath)
if err != nil {
return transaction, err
}
@ -704,9 +711,9 @@ func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetC
}, nil
}
func (ns *NodeServer) processEncryptedDevice(ctx context.Context, volOptions *rbdVolume, devicePath string, cr *util.Credentials) (string, error) {
func (ns *NodeServer) processEncryptedDevice(ctx context.Context, volOptions *rbdVolume, devicePath string) (string, error) {
imageSpec := volOptions.Pool + "/" + volOptions.RbdImageName
encrypted, err := util.CheckRbdImageEncrypted(ctx, cr, volOptions.Monitors, imageSpec)
encrypted, err := volOptions.checkRbdImageEncrypted(ctx)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get encryption status for rbd image %s: %v"),
imageSpec, err)
@ -724,15 +731,14 @@ func (ns *NodeServer) processEncryptedDevice(ctx context.Context, volOptions *rb
switch existingFormat {
case "":
err = encryptDevice(ctx, volOptions, cr, devicePath)
err = encryptDevice(ctx, volOptions, devicePath)
if err != nil {
return "", fmt.Errorf("failed to encrypt rbd image %s: %v", imageSpec, err)
}
case "crypt":
klog.Warningf(util.Log(ctx, "rbd image %s is encrypted, but encryption state was not updated"),
imageSpec)
err = util.SaveRbdImageEncryptionStatus(
ctx, cr, volOptions.Monitors, imageSpec, rbdImageEncrypted)
err = volOptions.ensureEncryptionMetadataSet(rbdImageEncrypted)
if err != nil {
return "", fmt.Errorf("failed to update encryption state for rbd image %s", imageSpec)
}
@ -753,7 +759,7 @@ func (ns *NodeServer) processEncryptedDevice(ctx context.Context, volOptions *rb
return devicePath, nil
}
func encryptDevice(ctx context.Context, rbdVol *rbdVolume, cr *util.Credentials, devicePath string) error {
func encryptDevice(ctx context.Context, rbdVol *rbdVolume, devicePath string) error {
passphrase, err := util.GetCryptoPassphrase(ctx, rbdVol.VolID, rbdVol.KMS)
if err != nil {
klog.Errorf(util.Log(ctx, "failed to get crypto passphrase for %s/%s: %v"),
@ -767,10 +773,13 @@ func encryptDevice(ctx context.Context, rbdVol *rbdVolume, cr *util.Credentials,
return err
}
imageSpec := rbdVol.Pool + "/" + rbdVol.RbdImageName
err = util.SaveRbdImageEncryptionStatus(ctx, cr, rbdVol.Monitors, imageSpec, rbdImageEncrypted)
err = rbdVol.ensureEncryptionMetadataSet(rbdImageEncrypted)
if err != nil {
klog.Error(util.Log(ctx, err.Error()))
return err
}
return nil
}
func openEncryptedDevice(ctx context.Context, volOptions *rbdVolume, devicePath string) (string, error) {

56
internal/rbd/rbd_util.go
View File

@ -60,6 +60,8 @@ const (
// 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
@ -979,21 +981,53 @@ func resizeRBDImage(rbdVol *rbdVolume, cr *util.Credentials) error {
return nil
}
func ensureEncryptionMetadataSet(ctx context.Context, cr *util.Credentials, rbdVol *rbdVolume) error {
var vi util.CSIIdentifier
err := vi.DecomposeCSIID(rbdVol.VolID)
func (rv *rbdVolume) GetMetadata(key string) (string, error) {
ioctx, err := rv.conn.GetIoctx(rv.Pool)
if err != nil {
err = fmt.Errorf("error decoding volume ID (%s) (%s)", rbdVol.VolID, err)
return ErrInvalidVolID{err}
return "", errors.Wrapf(err, "failed to get ioctx for %q", rv.RbdImageName)
}
rbdImageName := volJournal.GetNameForUUID(rbdVol.NamePrefix, vi.ObjectUUID, false)
imageSpec := rbdVol.Pool + "/" + rbdImageName
err = util.SaveRbdImageEncryptionStatus(ctx, cr, rbdVol.Monitors, imageSpec, rbdImageRequiresEncryption)
image, err := librbd.OpenImage(ioctx, rv.RbdImageName, librbd.NoSnapshot)
if err != nil {
return fmt.Errorf("failed to save encryption status for %s: %v", imageSpec, err)
return "", errors.Wrapf(err, "could not open image %q", rv.RbdImageName)
}
defer image.Close()
return image.GetMetadata(key)
}
func (rv *rbdVolume) SetMetadata(key, value string) error {
ioctx, err := rv.conn.GetIoctx(rv.Pool)
if err != nil {
return errors.Wrapf(err, "failed to get ioctx for %q", rv.RbdImageName)
}
image, err := librbd.OpenImage(ioctx, rv.RbdImageName, librbd.NoSnapshot)
if err != nil {
return errors.Wrapf(err, "could not open image %q", rv.RbdImageName)
}
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.RbdImageName, err)
return "", err
}
encrypted := strings.TrimSpace(value)
klog.V(4).Infof(util.Log(ctx, "image %s encrypted state metadata reports %q"), rv.RbdImageName, 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.RbdImageName, err)
}
return nil

27
internal/util/crypto.go
View File

@ -36,9 +36,6 @@ const (
mapperFilePrefix = "luks-rbd-"
mapperFilePathPrefix = "/dev/mapper"
// image metadata key for encryption
encryptionMetaKey = ".rbd.csi.ceph.com/encrypted"
// Encryption passphrase location in K8s secrets
encryptionPassphraseKey = "encryptionPassphrase"
kmsTypeKey = "encryptionKMSType"
@ -248,27 +245,3 @@ func DeviceEncryptionStatus(ctx context.Context, devicePath string) (mappedDevic
// Identified as LUKS, but failed to identify a mapped device
return "", "", fmt.Errorf("mapped device not found in path %s", devicePath)
}
// CheckRbdImageEncrypted verifies if rbd image was encrypted when created
func CheckRbdImageEncrypted(ctx context.Context, cr *Credentials, monitors, imageSpec string) (string, error) {
value, err := GetImageMeta(ctx, cr, monitors, imageSpec, encryptionMetaKey)
if err != nil {
klog.Errorf(Log(ctx, "checking image %s encrypted state metadata failed: %s"), imageSpec, err)
return "", err
}
encrypted := strings.TrimSpace(value)
klog.V(4).Infof(Log(ctx, "image %s encrypted state metadata reports %q"), imageSpec, encrypted)
return encrypted, nil
}
// SaveRbdImageEncryptionStatus sets image metadata for encryption status
func SaveRbdImageEncryptionStatus(ctx context.Context, cr *Credentials, monitors, imageSpec, status string) error {
err := SetImageMeta(ctx, cr, monitors, imageSpec, encryptionMetaKey, status)
if err != nil {
err = fmt.Errorf("failed to save image metadata encryption status for %s: %v", imageSpec, err.Error())
klog.Errorf(Log(ctx, err.Error()))
return err
}
return nil
}