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rbd: add support for rbd striping

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RBD supports creating rbd images with
object size, stripe unit and stripe count
to support striping. This PR adds the support
for the same.

More details about striping at
https://docs.ceph.com/en/quincy/man/8/rbd/#striping

fixes: #3124

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
This commit is contained in:
Madhu Rajanna
2022-05-24 09:08:42 +05:30
committed by mergify[bot]
parent 8f99fe7250
commit 4b57cc3ec5
7 changed files with 447 additions and 36 deletions
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133
internal/rbd/rbd_util.go
View File

@ -21,6 +21,7 @@ import (
"encoding/json"
"errors"
"fmt"
"math"
"os"
"path/filepath"
"strconv"
@ -99,6 +100,11 @@ type rbdImage struct {
// VolSize is the size of the RBD image backing this rbdImage.
VolSize int64
// image striping configurations.
StripeCount uint64
StripeUnit uint64
ObjectSize uint64
Monitors string
// JournalPool is the ceph pool in which the CSI Journal/CSI snapshot Journal is
// stored
@ -408,27 +414,19 @@ func (rs *rbdSnapshot) String() string {
// 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)
}
}
log.DebugLog(ctx, logMsg,
log.DebugLog(ctx, "rbd: create %s size %s (features: %s) using mon %s",
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)
}
options := librbd.NewRbdImageOptions()
defer options.Destroy()
err := pOpts.setImageOptions(ctx, options)
if err != nil {
return err
}
err := pOpts.Connect(cr)
err = pOpts.Connect(cr)
if err != nil {
return err
}
@ -1280,9 +1278,40 @@ func genVolFromVolumeOptions(
rbdVol.Mounter)
rbdVol.DisableInUseChecks = disableInUseChecks
err = rbdVol.setStripeConfiguration(volOptions)
if err != nil {
return nil, err
}
return rbdVol, nil
}
func (ri *rbdImage) setStripeConfiguration(options map[string]string) error {
var err error
if val, ok := options["stripeUnit"]; ok {
ri.StripeUnit, err = strconv.ParseUint(val, 10, 64)
if err != nil {
return fmt.Errorf("failed to parse stripeUnit %s: %w", val, err)
}
}
if val, ok := options["stripeCount"]; ok {
ri.StripeCount, err = strconv.ParseUint(val, 10, 64)
if err != nil {
return fmt.Errorf("failed to parse stripeCount %s: %w", val, err)
}
}
if val, ok := options["objectSize"]; ok {
ri.ObjectSize, err = strconv.ParseUint(val, 10, 64)
if err != nil {
return fmt.Errorf("failed to parse objectSize %s: %w", val, err)
}
}
return nil
}
func (rv *rbdVolume) validateImageFeatures(imageFeatures string) error {
// It is possible for image features to be an empty string which
// the Go split function would return a single item array with
@ -1384,7 +1413,8 @@ func (rv *rbdVolume) cloneRbdImageFromSnapshot(
parentVol *rbdVolume,
) error {
var err error
logMsg := "rbd: clone %s %s (features: %s) using mon %s"
log.DebugLog(ctx, "rbd: clone %s %s (features: %s) using mon %s",
pSnapOpts, rv, rv.ImageFeatureSet.Names(), rv.Monitors)
err = parentVol.openIoctx()
if err != nil {
@ -1397,30 +1427,15 @@ func (rv *rbdVolume) cloneRbdImageFromSnapshot(
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)
}
}
log.DebugLog(ctx, logMsg,
pSnapOpts, rv, 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 = rv.setImageOptions(ctx, options)
if err != nil {
return err
}
err = options.SetUint64(librbd.ImageOptionCloneFormat, 2)
if err != nil {
return fmt.Errorf("failed to set image features: %w", err)
return err
}
// As the clone is yet to be created, open the Ioctx.
err = rv.openIoctx()
if err != nil {
@ -1461,6 +1476,52 @@ func (rv *rbdVolume) cloneRbdImageFromSnapshot(
return nil
}
// setImageOptions sets the image options.
func (rv *rbdVolume) setImageOptions(ctx context.Context, options *librbd.ImageOptions) error {
var err error
logMsg := fmt.Sprintf("setting image options on %s", rv)
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)
}
}
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)
}
}
if rv.StripeCount != 0 {
logMsg += fmt.Sprintf(", stripe count %d, stripe unit %d", rv.StripeCount, rv.StripeUnit)
err = options.SetUint64(librbd.RbdImageOptionStripeCount, rv.StripeCount)
if err != nil {
return fmt.Errorf("failed to set stripe count: %w", err)
}
err = options.SetUint64(librbd.RbdImageOptionStripeUnit, rv.StripeUnit)
if err != nil {
return fmt.Errorf("failed to set stripe unit: %w", err)
}
}
if rv.ObjectSize != 0 {
order := uint64(math.Log2(float64(rv.ObjectSize)))
logMsg += fmt.Sprintf(", object size %d, order %d", rv.ObjectSize, order)
err = options.SetUint64(librbd.RbdImageOptionOrder, order)
if err != nil {
return fmt.Errorf("failed to set object size: %w", err)
}
}
log.DebugLog(ctx, logMsg)
return nil
}
// getImageInfo queries rbd about the given image and returns its metadata, and returns
// ErrImageNotFound if provided image is not found.
func (ri *rbdImage) getImageInfo() error {