mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-17 20:00:23 +00:00
rbd: implement the VolumeGroup interface
Signed-off-by: Niels de Vos <ndevos@ibm.com>
This commit is contained in:
Niels de Vos
mergify[bot]
parent
fbf9ffcac4
commit
40b0526f64
402
internal/rbd/group/volume_group.go
Normal file
402
internal/rbd/group/volume_group.go
Normal file
@ -0,0 +1,402 @@
|
||||
/*
|
||||
Copyright 2024 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 group
|
||||
|
||||
import (
|
||||
"context"
|
||||
"errors"
|
||||
"fmt"
|
||||
|
||||
"github.com/ceph/go-ceph/rados"
|
||||
librbd "github.com/ceph/go-ceph/rbd"
|
||||
"github.com/container-storage-interface/spec/lib/go/csi"
|
||||
"github.com/csi-addons/spec/lib/go/volumegroup"
|
||||
|
||||
"github.com/ceph/ceph-csi/internal/journal"
|
||||
"github.com/ceph/ceph-csi/internal/rbd/types"
|
||||
"github.com/ceph/ceph-csi/internal/util"
|
||||
"github.com/ceph/ceph-csi/internal/util/log"
|
||||
)
|
||||
|
||||
var ErrRBDGroupNotConnected = errors.New("RBD group is not connected")
|
||||
|
||||
// volumeGroup handles all requests for 'rbd group' operations.
|
||||
type volumeGroup struct {
|
||||
// id is a unique value for this volume group in the Ceph cluster, it
|
||||
// is used to find the group in the journal.
|
||||
id string
|
||||
|
||||
// name is used in RBD API calls as the name of this object
|
||||
name string
|
||||
|
||||
clusterID string
|
||||
|
||||
credentials *util.Credentials
|
||||
|
||||
// temporary connection attributes
|
||||
conn *util.ClusterConnection
|
||||
ioctx *rados.IOContext
|
||||
|
||||
// required details to perform operations on the group
|
||||
monitors string
|
||||
pool string
|
||||
namespace string
|
||||
|
||||
// volumes is a list of rbd-images that are part of the group. The ID
|
||||
// of each volume is stored in the journal.
|
||||
volumes []types.Volume
|
||||
|
||||
journal journal.VolumeGroupJournal
|
||||
}
|
||||
|
||||
// verify that volumeGroup implements the VolumeGroup and Stringer interfaces.
|
||||
var (
|
||||
_ types.VolumeGroup = &volumeGroup{}
|
||||
_ fmt.Stringer = &volumeGroup{}
|
||||
)
|
||||
|
||||
// GetVolumeGroup initializes a new VolumeGroup object that can be used
|
||||
// to manage an `rbd group`.
|
||||
func GetVolumeGroup(
|
||||
ctx context.Context,
|
||||
id string,
|
||||
j journal.VolumeGroupJournal,
|
||||
creds *util.Credentials,
|
||||
) (types.VolumeGroup, error) {
|
||||
csiID := util.CSIIdentifier{}
|
||||
err := csiID.DecomposeCSIID(id)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to decompose volume group id %q: %w", id, err)
|
||||
}
|
||||
|
||||
mons, err := util.Mons(util.CsiConfigFile, csiID.ClusterID)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to get MONs for cluster id %q: %w", csiID.ClusterID, err)
|
||||
}
|
||||
|
||||
namespace, err := util.GetRadosNamespace(util.CsiConfigFile, csiID.ClusterID)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to get RADOS namespace for cluster id %q: %w", csiID.ClusterID, err)
|
||||
}
|
||||
|
||||
pool, err := util.GetPoolName(mons, creds, csiID.LocationID)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to get pool for volume group id %q: %w", id, err)
|
||||
}
|
||||
|
||||
attrs, err := j.GetVolumeGroupAttributes(ctx, pool, csiID.ObjectUUID)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to get attributes for volume group id %q: %w", id, err)
|
||||
}
|
||||
|
||||
// TODO: get the volumes that are part of this volume group
|
||||
|
||||
return &volumeGroup{
|
||||
journal: j,
|
||||
credentials: creds,
|
||||
id: id,
|
||||
name: attrs.GroupName,
|
||||
clusterID: csiID.ClusterID,
|
||||
monitors: mons,
|
||||
pool: pool,
|
||||
namespace: namespace,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// String makes it easy to include the volumeGroup object in log and error
|
||||
// messages.
|
||||
func (vg *volumeGroup) String() string {
|
||||
if vg.name != "" {
|
||||
return vg.name
|
||||
}
|
||||
|
||||
if vg.id != "" {
|
||||
return vg.id
|
||||
}
|
||||
|
||||
return fmt.Sprintf("<unidentified volume %v>", *vg)
|
||||
}
|
||||
|
||||
// GetID returns the CSI-Addons VolumeGroupId of the VolumeGroup.
|
||||
func (vg *volumeGroup) GetID(ctx context.Context) (string, error) {
|
||||
if vg.id == "" {
|
||||
return "", errors.New("BUG: ID is not set")
|
||||
}
|
||||
|
||||
return vg.id, nil
|
||||
}
|
||||
|
||||
// GetName returns the name in the backend storage for the VolumeGroup.
|
||||
func (vg *volumeGroup) GetName(ctx context.Context) (string, error) {
|
||||
if vg.name == "" {
|
||||
return "", errors.New("BUG: name is not set")
|
||||
}
|
||||
|
||||
return vg.name, nil
|
||||
}
|
||||
|
||||
// ToCSI creates a CSI-Addons type for the VolumeGroup.
|
||||
func (vg *volumeGroup) ToCSI(ctx context.Context) (*volumegroup.VolumeGroup, error) {
|
||||
volumes, err := vg.ListVolumes(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to list volumes for volume group %q: %w", vg, err)
|
||||
}
|
||||
|
||||
csiVolumes := make([]*csi.Volume, len(volumes))
|
||||
for i, vol := range volumes {
|
||||
csiVolumes[i], err = vol.ToCSI(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to convert volume %q to CSI type: %w", vol, err)
|
||||
}
|
||||
}
|
||||
|
||||
id, err := vg.GetID(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to get id for volume group %q: %w", vg, err)
|
||||
}
|
||||
|
||||
// TODO: maybe store the VolumeContext in the journal?
|
||||
vgContext := map[string]string{}
|
||||
|
||||
return &volumegroup.VolumeGroup{
|
||||
VolumeGroupId: id,
|
||||
VolumeGroupContext: vgContext,
|
||||
Volumes: csiVolumes,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// getConnection returns the ClusterConnection for the volume group if it
|
||||
// exists, otherwise it will open a new one.
|
||||
// Destroy should be used to close the ClusterConnection.
|
||||
func (vg *volumeGroup) getConnection(ctx context.Context) (*util.ClusterConnection, error) {
|
||||
if vg.conn != nil {
|
||||
return vg.conn, nil
|
||||
}
|
||||
|
||||
conn := &util.ClusterConnection{}
|
||||
err := conn.Connect(vg.monitors, vg.credentials)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("failed to connect to MONs %q: %w", vg.monitors, err)
|
||||
}
|
||||
|
||||
vg.conn = conn
|
||||
log.DebugLog(ctx, "connection established for volume group %q", vg.id)
|
||||
|
||||
return conn, nil
|
||||
}
|
||||
|
||||
// GetIOContext returns the IOContext for the volume group if it exists,
|
||||
// otherwise it will allocate a new one.
|
||||
// Destroy should be used to free the IOContext.
|
||||
func (vg *volumeGroup) GetIOContext(ctx context.Context) (*rados.IOContext, error) {
|
||||
if vg.ioctx != nil {
|
||||
return vg.ioctx, nil
|
||||
}
|
||||
|
||||
conn, err := vg.getConnection(ctx)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("%w: failed to connect: %w", ErrRBDGroupNotConnected, err)
|
||||
}
|
||||
|
||||
ioctx, err := conn.GetIoctx(vg.pool)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("%w: failed to get IOContext: %w", ErrRBDGroupNotConnected, err)
|
||||
}
|
||||
|
||||
if vg.namespace != "" {
|
||||
ioctx.SetNamespace(vg.namespace)
|
||||
}
|
||||
|
||||
vg.ioctx = ioctx
|
||||
log.DebugLog(ctx, "iocontext created for volume group %q in pool %q", vg.id, vg.pool)
|
||||
|
||||
return ioctx, nil
|
||||
}
|
||||
|
||||
// Destroy frees the resources used by the volumeGroup.
|
||||
func (vg *volumeGroup) Destroy(ctx context.Context) {
|
||||
if vg.ioctx != nil {
|
||||
vg.ioctx.Destroy()
|
||||
vg.ioctx = nil
|
||||
}
|
||||
|
||||
if vg.conn != nil {
|
||||
vg.conn.Destroy()
|
||||
vg.conn = nil
|
||||
}
|
||||
|
||||
if vg.credentials != nil {
|
||||
vg.credentials.DeleteCredentials()
|
||||
vg.credentials = nil
|
||||
}
|
||||
|
||||
// FIXME: maybe need to .Destroy() all vg.volumes?
|
||||
log.DebugLog(ctx, "destroyed volume group instance with id %q", vg.id)
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) Create(ctx context.Context, name string) error {
|
||||
// TODO: if the group already exists, resolve details and use that
|
||||
ioctx, err := vg.GetIOContext(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = librbd.GroupCreate(ioctx, name)
|
||||
if err != nil {
|
||||
if !errors.Is(rados.ErrObjectExists, err) {
|
||||
return fmt.Errorf("failed to create volume group %q: %w", name, err)
|
||||
}
|
||||
|
||||
log.DebugLog(ctx, "ignoring error while creating volume group %q: %v", vg, err)
|
||||
}
|
||||
|
||||
log.DebugLog(ctx, "volume group %q has been created", name)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) Delete(ctx context.Context) error {
|
||||
ioctx, err := vg.GetIOContext(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
err = librbd.GroupRemove(ioctx, vg.name)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to remove volume group %q: %w", vg, err)
|
||||
}
|
||||
|
||||
log.DebugLog(ctx, "volume group %q has been removed", vg)
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) AddVolume(ctx context.Context, vol types.Volume) error {
|
||||
err := vol.AddToGroup(ctx, vg)
|
||||
if err != nil {
|
||||
// rados.ErrObjectExists does not match the rbd error (there is no EEXISTS error)
|
||||
if errors.Is(rados.ErrObjectExists, err) || strings.Contains(err.Error(), "ret=-17") {
|
||||
log.DebugLog(ctx, "volume %q is already part of volume group %q: %v", vol, vg, err)
|
||||
return nil
|
||||
}
|
||||
|
||||
return fmt.Errorf("failed to add volume %q to volume group %q: %w", vol, vg, err)
|
||||
}
|
||||
|
||||
vg.volumes = append(vg.volumes, vol)
|
||||
|
||||
volID, err := vol.GetID(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
pool, err := vg.GetPool(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
id, err := vg.GetID(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
csiID := util.CSIIdentifier{}
|
||||
err = csiID.DecomposeCSIID(id)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to decompose volume group id %q: %w", id, err)
|
||||
}
|
||||
|
||||
toAdd := map[string]string{
|
||||
volID: "",
|
||||
}
|
||||
|
||||
err = vg.journal.AddVolumesMapping(ctx, pool, csiID.ObjectUUID, toAdd)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to add mapping for volume %q to volume group id %q: %w", volID, id, err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) RemoveVolume(ctx context.Context, vol types.Volume) error {
|
||||
// volume was already removed from the group
|
||||
if len(vg.volumes) == 0 {
|
||||
return nil
|
||||
}
|
||||
|
||||
err := vol.RemoveFromGroup(ctx, vg)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to remove volume %q from volume group %q: %w", vol, vg, err)
|
||||
}
|
||||
|
||||
// toRemove contain the ID of the volume that is removed from the group
|
||||
toRemove, err := vol.GetID(ctx)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to get volume id for %q: %w", vol, err)
|
||||
}
|
||||
|
||||
// volumes is the updated list, without the volume that was removed
|
||||
volumes := make([]types.Volume, 0)
|
||||
var id string
|
||||
for _, v := range vg.volumes {
|
||||
id, err = v.GetID(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if id == toRemove {
|
||||
// do not add the volume to the list
|
||||
continue
|
||||
}
|
||||
|
||||
volumes = append(volumes, v)
|
||||
}
|
||||
|
||||
// update the list of volumes
|
||||
vg.volumes = volumes
|
||||
|
||||
pool, err := vg.GetPool(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
id, err = vg.GetID(ctx)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
csiID := util.CSIIdentifier{}
|
||||
err = csiID.DecomposeCSIID(id)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to decompose volume group id %q: %w", id, err)
|
||||
}
|
||||
|
||||
mapping := []string{
|
||||
toRemove,
|
||||
}
|
||||
|
||||
err = vg.journal.RemoveVolumesMapping(ctx, pool, csiID.ObjectUUID, mapping)
|
||||
if err != nil {
|
||||
return fmt.Errorf("failed to remove mapping for volume %q to volume group id %q: %w", toRemove, id, err)
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) ListVolumes(ctx context.Context) ([]types.Volume, error) {
|
||||
return vg.volumes, nil
|
||||
}
|
||||
@ -19,6 +19,7 @@ package types
|
||||
import (
|
||||
"context"
|
||||
|
||||
"github.com/ceph/go-ceph/rados"
|
||||
"github.com/csi-addons/spec/lib/go/volumegroup"
|
||||
)
|
||||
|
||||
@ -28,11 +29,22 @@ type VolumeGroup interface {
|
||||
// Destroy frees the resources used by the VolumeGroup.
|
||||
Destroy(ctx context.Context)
|
||||
|
||||
// GetIOContext returns the IOContext for performing librbd operations
|
||||
// on the VolumeGroup. This is used by the rbdVolume struct when it
|
||||
// needs to add/remove itself from the VolumeGroup.
|
||||
GetIOContext(ctx context.Context) (*rados.IOContext, error)
|
||||
|
||||
// GetID returns the CSI-Addons VolumeGroupId of the VolumeGroup.
|
||||
GetID(ctx context.Context) (string, error)
|
||||
|
||||
// GetName returns the name in the backend storage for the VolumeGroup.
|
||||
GetName(ctx context.Context) (string, error)
|
||||
|
||||
// ToCSI creates a CSI-Addons type for the VolumeGroup.
|
||||
ToCSI(ctx context.Context) *volumegroup.VolumeGroup
|
||||
ToCSI(ctx context.Context) (*volumegroup.VolumeGroup, error)
|
||||
|
||||
// Create makes a new group in the backend storage.
|
||||
Create(ctx context.Context, name string) error
|
||||
|
||||
// Delete removes the VolumeGroup from the backend storage.
|
||||
Delete(ctx context.Context) error
|
||||
|
||||
Loading…
Reference in New Issue
Block a user