mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-09-16 13:39:50 +00:00
rbd: move common functions for VolumeGroup structs into own type
Many functions that are implemented for the volumeGroup type can be shared with the (coming) volumeGroupSnapshot type. Move these functions into a commonVolumeGroup type, so that volumeGroup and volumeGroupSnapshot can inherit them. Signed-off-by: Niels de Vos <ndevos@ibm.com>
This commit is contained in:
Niels de Vos
mergify[bot]
parent
3ac596840c
commit
689498e66a
248
internal/rbd/group/util.go
Normal file
248
internal/rbd/group/util.go
Normal file
@ -0,0 +1,248 @@
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/*
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Copyright 2024 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package group
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import (
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"context"
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"errors"
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"fmt"
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"time"
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"github.com/ceph/go-ceph/rados"
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"github.com/ceph/ceph-csi/internal/journal"
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"github.com/ceph/ceph-csi/internal/util"
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"github.com/ceph/ceph-csi/internal/util/log"
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)
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type commonVolumeGroup struct {
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// id is a unique value for this volume group in the Ceph cluster, it
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// is used to find the group in the journal.
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id string
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// name is used in RBD API calls as the name of this object
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name string
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// creationTime is the time the group was created
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creationTime *time.Time
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clusterID string
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objectUUID string
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credentials *util.Credentials
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// temporary connection attributes
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conn *util.ClusterConnection
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ioctx *rados.IOContext
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// required details to perform operations on the group
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monitors string
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pool string
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namespace string
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journal journal.VolumeGroupJournal
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}
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func (cvg *commonVolumeGroup) initCommonVolumeGroup(
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ctx context.Context,
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id string,
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j journal.VolumeGroupJournal,
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creds *util.Credentials,
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) error {
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csiID := util.CSIIdentifier{}
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err := csiID.DecomposeCSIID(id)
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if err != nil {
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return fmt.Errorf("failed to decompose volume group id %q: %w", id, err)
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}
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mons, err := util.Mons(util.CsiConfigFile, csiID.ClusterID)
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if err != nil {
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return fmt.Errorf("failed to get MONs for cluster id %q: %w", csiID.ClusterID, err)
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}
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namespace, err := util.GetRadosNamespace(util.CsiConfigFile, csiID.ClusterID)
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if err != nil {
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return fmt.Errorf("failed to get RADOS namespace for cluster id %q: %w", csiID.ClusterID, err)
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}
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pool, err := util.GetPoolName(mons, creds, csiID.LocationID)
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if err != nil {
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return fmt.Errorf("failed to get pool for volume group id %q: %w", id, err)
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}
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cvg.journal = j
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cvg.credentials = creds
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cvg.id = id
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cvg.clusterID = csiID.ClusterID
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cvg.objectUUID = csiID.ObjectUUID
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cvg.monitors = mons
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cvg.pool = pool
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cvg.namespace = namespace
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log.DebugLog(ctx, "object for volume group %q has been initialized", cvg.id)
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return nil
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}
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func (cvg *commonVolumeGroup) Destroy(ctx context.Context) {
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if cvg.ioctx != nil {
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cvg.ioctx.Destroy()
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cvg.ioctx = nil
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}
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if cvg.conn != nil {
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cvg.conn.Destroy()
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cvg.conn = nil
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}
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if cvg.credentials != nil {
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cvg.credentials.DeleteCredentials()
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cvg.credentials = nil
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}
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log.DebugLog(ctx, "destroyed volume group instance with id %q", cvg.id)
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}
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// getVolumeGroupAttributes fetches the attributes from the journal, sets some
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// of the common values for the VolumeGroup and returns the attributes struct
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// for further consumption (like checking the VolumeMap).
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func (cvg *commonVolumeGroup) getVolumeGroupAttributes(ctx context.Context) (*journal.VolumeGroupAttributes, error) {
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attrs, err := cvg.journal.GetVolumeGroupAttributes(ctx, cvg.pool, cvg.objectUUID)
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if err != nil {
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if !errors.Is(err, util.ErrKeyNotFound) && !errors.Is(err, util.ErrPoolNotFound) {
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return nil, fmt.Errorf("failed to get attributes for volume group id %q: %w", cvg.id, err)
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}
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attrs = &journal.VolumeGroupAttributes{}
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}
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cvg.name = attrs.GroupName
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cvg.creationTime = attrs.CreationTime
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return attrs, nil
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}
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// String returns the image-spec (pool/{namespace}/{name}) format of the group.
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func (cvg *commonVolumeGroup) String() string {
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if cvg.namespace != "" && cvg.pool != "" && cvg.name != "" {
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return fmt.Sprintf("%s/%s/%s", cvg.pool, cvg.namespace, cvg.name)
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}
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if cvg.name != "" && cvg.pool != "" {
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return fmt.Sprintf("%s/%s", cvg.pool, cvg.name)
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}
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return fmt.Sprintf("<unidentified group %v>", *cvg)
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}
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// GetID returns the CSI-Addons VolumeGroupId of the VolumeGroup.
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func (cvg *commonVolumeGroup) GetID(ctx context.Context) (string, error) {
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if cvg.id == "" {
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return "", errors.New("BUG: ID is not set")
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}
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return cvg.id, nil
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}
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// GetName returns the name in the backend storage for the VolumeGroup.
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func (cvg *commonVolumeGroup) GetName(ctx context.Context) (string, error) {
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if cvg.name == "" {
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return "", errors.New("BUG: name is not set")
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}
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return cvg.name, nil
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}
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// GetPool returns the name of the pool that holds the VolumeGroup.
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func (cvg *commonVolumeGroup) GetPool(ctx context.Context) (string, error) {
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if cvg.pool == "" {
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return "", errors.New("BUG: pool is not set")
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}
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return cvg.pool, nil
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}
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// GetClusterID returns the name of the pool that holds the VolumeGroup.
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func (cvg *commonVolumeGroup) GetClusterID(ctx context.Context) (string, error) {
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if cvg.clusterID == "" {
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return "", errors.New("BUG: clusterID is not set")
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}
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return cvg.clusterID, nil
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}
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// getConnection returns the ClusterConnection for the volume group if it
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// exists, otherwise it will open a new one.
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// Destroy should be used to close the ClusterConnection.
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func (cvg *commonVolumeGroup) getConnection(ctx context.Context) (*util.ClusterConnection, error) {
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if cvg.conn != nil {
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return cvg.conn, nil
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}
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conn := &util.ClusterConnection{}
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err := conn.Connect(cvg.monitors, cvg.credentials)
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if err != nil {
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return nil, fmt.Errorf("failed to connect to MONs %q: %w", cvg.monitors, err)
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}
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cvg.conn = conn
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log.DebugLog(ctx, "connection established for volume group %q", cvg.id)
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return conn, nil
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}
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// GetIOContext returns the IOContext for the volume group if it exists,
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// otherwise it will allocate a new one.
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// Destroy should be used to free the IOContext.
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func (cvg *commonVolumeGroup) GetIOContext(ctx context.Context) (*rados.IOContext, error) {
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if cvg.ioctx != nil {
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return cvg.ioctx, nil
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}
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conn, err := cvg.getConnection(ctx)
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if err != nil {
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return nil, fmt.Errorf("%w: failed to connect: %w", ErrRBDGroupNotConnected, err)
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}
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ioctx, err := conn.GetIoctx(cvg.pool)
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if err != nil {
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return nil, fmt.Errorf("%w: failed to get IOContext: %w", ErrRBDGroupNotConnected, err)
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}
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if cvg.namespace != "" {
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ioctx.SetNamespace(cvg.namespace)
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}
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cvg.ioctx = ioctx
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log.DebugLog(ctx, "iocontext created for volume group %q in pool %q", cvg.id, cvg.pool)
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return ioctx, nil
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}
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// GetCreationTime fetches the creation time of the volume group from the
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// journal and returns it.
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func (cvg *commonVolumeGroup) GetCreationTime(ctx context.Context) (*time.Time, error) {
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if cvg.creationTime == nil {
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// getVolumeGroupAttributes sets .creationTime (and a few other attributes)
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_, err := cvg.getVolumeGroupAttributes(ctx)
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if err != nil {
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return nil, fmt.Errorf("failed to get volume attributes for id %q: %w", cvg, err)
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}
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}
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return cvg.creationTime, nil
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}
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@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rbd_group
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package group
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import (
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"context"
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@ -37,27 +37,7 @@ var ErrRBDGroupNotConnected = errors.New("RBD group is not connected")
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// volumeGroup handles all requests for 'rbd group' operations.
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type volumeGroup struct {
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// id is a unique value for this volume group in the Ceph cluster, it
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// is used to find the group in the journal.
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id string
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// name is used in RBD API calls as the name of this object
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name string
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clusterID string
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credentials *util.Credentials
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// temporary connection attributes
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conn *util.ClusterConnection
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ioctx *rados.IOContext
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// required details to perform operations on the group
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monitors string
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pool string
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namespace string
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journal journal.VolumeGroupJournal
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*commonVolumeGroup
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// volumes is a list of rbd-images that are part of the group. The ID
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// of each volume is stored in the journal.
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@ -87,119 +67,47 @@ func GetVolumeGroup(
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creds *util.Credentials,
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volumeResolver types.VolumeResolver,
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) (types.VolumeGroup, error) {
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csiID := util.CSIIdentifier{}
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err := csiID.DecomposeCSIID(id)
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vg := &volumeGroup{}
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err := vg.initCommonVolumeGroup(ctx, id, j, creds)
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if err != nil {
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return nil, fmt.Errorf("failed to decompose volume group id %q: %w", id, err)
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return nil, fmt.Errorf("failed to initialize volume group with id %q: %w", id, err)
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}
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mons, err := util.Mons(util.CsiConfigFile, csiID.ClusterID)
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attrs, err := vg.getVolumeGroupAttributes(ctx)
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if err != nil {
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return nil, fmt.Errorf("failed to get MONs for cluster id %q: %w", csiID.ClusterID, err)
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}
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namespace, err := util.GetRadosNamespace(util.CsiConfigFile, csiID.ClusterID)
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if err != nil {
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return nil, fmt.Errorf("failed to get RADOS namespace for cluster id %q: %w", csiID.ClusterID, err)
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}
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pool, err := util.GetPoolName(mons, creds, csiID.LocationID)
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if err != nil {
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return nil, fmt.Errorf("failed to get pool for volume group id %q: %w", id, err)
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}
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attrs, err := j.GetVolumeGroupAttributes(ctx, pool, csiID.ObjectUUID)
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if err != nil {
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if !errors.Is(err, util.ErrKeyNotFound) && !errors.Is(err, util.ErrPoolNotFound) {
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return nil, fmt.Errorf("failed to get attributes for volume group id %q: %w", id, err)
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}
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attrs = &journal.VolumeGroupAttributes{}
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return nil, fmt.Errorf("failed to get volume attributes for id %q: %w", vg, err)
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}
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var volumes []types.Volume
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// it is needed to free the previously allocated volumes
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defer func() {
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// volumesToFree is empty in case of an error, let .Destroy() handle it otherwise
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if len(vg.volumesToFree) > 0 {
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return
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}
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for _, v := range volumes {
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v.Destroy(ctx)
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}
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}()
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for volID := range attrs.VolumeMap {
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vol, err := volumeResolver.GetVolumeByID(ctx, volID)
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if err != nil {
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// free the previously allocated volumes
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for _, v := range volumes {
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v.Destroy(ctx)
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}
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return nil, fmt.Errorf("failed to get attributes for volume group id %q: %w", id, err)
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}
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volumes = append(volumes, vol)
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}
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vg := &volumeGroup{
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journal: j,
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credentials: creds,
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id: id,
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name: attrs.GroupName,
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clusterID: csiID.ClusterID,
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monitors: mons,
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pool: pool,
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namespace: namespace,
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volumes: volumes,
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// all allocated volumes need to be free'd at Destroy() time
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volumesToFree: volumes,
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}
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vg.volumes = volumes
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// all allocated volumes need to be free'd at Destroy() time
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vg.volumesToFree = volumes
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log.DebugLog(ctx, "GetVolumeGroup(%s) returns %+v", id, *vg)
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return vg, nil
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}
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// String returns the image-spec (pool/{namespace}/{name}) format of the group.
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func (vg *volumeGroup) String() string {
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if vg.namespace != "" && vg.pool != "" && vg.name != "" {
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return fmt.Sprintf("%s/%s/%s", vg.pool, vg.namespace, vg.name)
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}
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if vg.name != "" && vg.pool != "" {
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return fmt.Sprintf("%s/%s", vg.pool, vg.name)
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}
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return fmt.Sprintf("<unidentified group %v>", *vg)
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}
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// GetID returns the CSI-Addons VolumeGroupId of the VolumeGroup.
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func (vg *volumeGroup) GetID(ctx context.Context) (string, error) {
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if vg.id == "" {
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return "", errors.New("BUG: ID is not set")
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}
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return vg.id, nil
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}
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// GetName returns the name in the backend storage for the VolumeGroup.
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func (vg *volumeGroup) GetName(ctx context.Context) (string, error) {
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if vg.name == "" {
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return "", errors.New("BUG: name is not set")
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}
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return vg.name, nil
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}
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// GetPool returns the name of the pool that holds the VolumeGroup.
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func (vg *volumeGroup) GetPool(ctx context.Context) (string, error) {
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if vg.pool == "" {
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return "", errors.New("BUG: pool is not set")
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}
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return vg.pool, nil
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}
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// GetClusterID returns the name of the pool that holds the VolumeGroup.
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func (vg *volumeGroup) GetClusterID(ctx context.Context) (string, error) {
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if vg.clusterID == "" {
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return "", errors.New("BUG: clusterID is not set")
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}
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return vg.clusterID, nil
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}
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// ToCSI creates a CSI-Addons type for the VolumeGroup.
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func (vg *volumeGroup) ToCSI(ctx context.Context) (*volumegroup.VolumeGroup, error) {
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volumes, err := vg.ListVolumes(ctx)
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@ -230,54 +138,6 @@ func (vg *volumeGroup) ToCSI(ctx context.Context) (*volumegroup.VolumeGroup, err
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}, nil
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}
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// getConnection returns the ClusterConnection for the volume group if it
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// exists, otherwise it will open a new one.
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// Destroy should be used to close the ClusterConnection.
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func (vg *volumeGroup) getConnection(ctx context.Context) (*util.ClusterConnection, error) {
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if vg.conn != nil {
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return vg.conn, nil
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}
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conn := &util.ClusterConnection{}
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err := conn.Connect(vg.monitors, vg.credentials)
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if err != nil {
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return nil, fmt.Errorf("failed to connect to MONs %q: %w", vg.monitors, err)
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}
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vg.conn = conn
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log.DebugLog(ctx, "connection established for volume group %q", vg.id)
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return conn, nil
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}
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// GetIOContext returns the IOContext for the volume group if it exists,
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// otherwise it will allocate a new one.
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// Destroy should be used to free the IOContext.
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func (vg *volumeGroup) GetIOContext(ctx context.Context) (*rados.IOContext, error) {
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if vg.ioctx != nil {
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return vg.ioctx, nil
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}
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conn, err := vg.getConnection(ctx)
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if err != nil {
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return nil, fmt.Errorf("%w: failed to connect: %w", ErrRBDGroupNotConnected, err)
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}
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ioctx, err := conn.GetIoctx(vg.pool)
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if err != nil {
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return nil, fmt.Errorf("%w: failed to get IOContext: %w", ErrRBDGroupNotConnected, err)
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}
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if vg.namespace != "" {
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ioctx.SetNamespace(vg.namespace)
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}
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vg.ioctx = ioctx
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log.DebugLog(ctx, "iocontext created for volume group %q in pool %q", vg.id, vg.pool)
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return ioctx, nil
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}
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// Destroy frees the resources used by the volumeGroup.
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func (vg *volumeGroup) Destroy(ctx context.Context) {
|
||||
// free the volumes that were allocated in GetVolumeGroup()
|
||||
@ -288,22 +148,7 @@ func (vg *volumeGroup) Destroy(ctx context.Context) {
|
||||
vg.volumesToFree = make([]types.Volume, 0)
|
||||
}
|
||||
|
||||
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
|
||||
}
|
||||
|
||||
log.DebugLog(ctx, "destroyed volume group instance with id %q", vg.id)
|
||||
vg.commonVolumeGroup.Destroy(ctx)
|
||||
}
|
||||
|
||||
func (vg *volumeGroup) Create(ctx context.Context) error {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user