mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-23 06:40:23 +00:00
369 lines
13 KiB
Go
369 lines
13 KiB
Go
/*
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Copyright 2018 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 cephfs
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import (
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"context"
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csicommon "github.com/ceph/ceph-csi/pkg/csi-common"
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"github.com/ceph/ceph-csi/pkg/util"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"k8s.io/klog"
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)
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// ControllerServer struct of CEPH CSI driver with supported methods of CSI
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// controller server spec.
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type ControllerServer struct {
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*csicommon.DefaultControllerServer
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MetadataStore util.CachePersister
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// A map storing all volumes with ongoing operations so that additional operations
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// for that same volume (as defined by VolumeID/volume name) return an Aborted error
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VolumeLocks *util.VolumeLocks
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}
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type controllerCacheEntry struct {
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VolOptions volumeOptions
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VolumeID volumeID
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}
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// createBackingVolume creates the backing subvolume and on any error cleans up any created entities
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func (cs *ControllerServer) createBackingVolume(ctx context.Context, volOptions *volumeOptions, vID *volumeIdentifier, secret map[string]string) error {
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cr, err := util.NewAdminCredentials(secret)
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if err != nil {
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return status.Error(codes.InvalidArgument, err.Error())
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}
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defer cr.DeleteCredentials()
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if err = createVolume(ctx, volOptions, cr, volumeID(vID.FsSubvolName), volOptions.Size); err != nil {
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klog.Errorf(util.Log(ctx, "failed to create volume %s: %v"), volOptions.RequestName, err)
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return status.Error(codes.Internal, err.Error())
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}
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return nil
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}
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// CreateVolume creates a reservation and the volume in backend, if it is not already present
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func (cs *ControllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
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if err := cs.validateCreateVolumeRequest(req); err != nil {
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klog.Errorf(util.Log(ctx, "CreateVolumeRequest validation failed: %v"), err)
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return nil, err
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}
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// Configuration
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secret := req.GetSecrets()
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requestName := req.GetName()
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// Existence and conflict checks
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if acquired := cs.VolumeLocks.TryAcquire(requestName); !acquired {
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klog.Errorf(util.Log(ctx, util.VolumeOperationAlreadyExistsFmt), requestName)
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, requestName)
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}
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defer cs.VolumeLocks.Release(requestName)
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volOptions, err := newVolumeOptions(ctx, requestName, req, secret)
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if err != nil {
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klog.Errorf(util.Log(ctx, "validation and extraction of volume options failed: %v"), err)
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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if req.GetCapacityRange() != nil {
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volOptions.Size = util.RoundOffBytes(req.GetCapacityRange().GetRequiredBytes())
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}
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// TODO need to add check for 0 volume size
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vID, err := checkVolExists(ctx, volOptions, secret)
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if err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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// TODO return error message if requested vol size greater than found volume return error
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if vID != nil {
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volume := &csi.Volume{
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VolumeId: vID.VolumeID,
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CapacityBytes: volOptions.Size,
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VolumeContext: req.GetParameters(),
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}
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if volOptions.Topology != nil {
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volume.AccessibleTopology =
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[]*csi.Topology{
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{
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Segments: volOptions.Topology,
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},
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}
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}
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return &csi.CreateVolumeResponse{Volume: volume}, nil
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}
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// Reservation
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vID, err = reserveVol(ctx, volOptions, secret)
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if err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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defer func() {
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if err != nil {
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errDefer := undoVolReservation(ctx, volOptions, *vID, secret)
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if errDefer != nil {
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klog.Warningf(util.Log(ctx, "failed undoing reservation of volume: %s (%s)"),
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requestName, errDefer)
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}
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}
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}()
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// Create a volume
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err = cs.createBackingVolume(ctx, volOptions, vID, secret)
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if err != nil {
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return nil, err
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}
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klog.V(4).Infof(util.Log(ctx, "cephfs: successfully created backing volume named %s for request name %s"),
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vID.FsSubvolName, requestName)
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volume := &csi.Volume{
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VolumeId: vID.VolumeID,
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CapacityBytes: volOptions.Size,
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VolumeContext: req.GetParameters(),
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}
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if volOptions.Topology != nil {
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volume.AccessibleTopology =
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[]*csi.Topology{
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{
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Segments: volOptions.Topology,
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},
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}
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}
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return &csi.CreateVolumeResponse{Volume: volume}, nil
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}
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// deleteVolumeDeprecated is used to delete volumes created using version 1.0.0 of the plugin,
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// that have state information stored in files or kubernetes config maps
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func (cs *ControllerServer) deleteVolumeDeprecated(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
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var (
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volID = volumeID(req.GetVolumeId())
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secrets = req.GetSecrets()
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)
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ce := &controllerCacheEntry{}
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if err := cs.MetadataStore.Get(string(volID), ce); err != nil {
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if err, ok := err.(*util.CacheEntryNotFound); ok {
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klog.Warningf(util.Log(ctx, "cephfs: metadata for volume %s not found, assuming the volume to be already deleted (%v)"), volID, err)
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return &csi.DeleteVolumeResponse{}, nil
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}
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return nil, status.Error(codes.Internal, err.Error())
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}
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if !ce.VolOptions.ProvisionVolume {
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// DeleteVolume() is forbidden for statically provisioned volumes!
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klog.Warningf(util.Log(ctx, "volume %s is provisioned statically, aborting delete"), volID)
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return &csi.DeleteVolumeResponse{}, nil
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}
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// mons may have changed since create volume,
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// retrieve the latest mons and override old mons
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if mon, secretsErr := util.GetMonValFromSecret(secrets); secretsErr == nil && len(mon) > 0 {
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klog.V(3).Infof(util.Log(ctx, "overriding monitors [%q] with [%q] for volume %s"), ce.VolOptions.Monitors, mon, volID)
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ce.VolOptions.Monitors = mon
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}
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// Deleting a volume requires admin credentials
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cr, err := util.NewAdminCredentials(secrets)
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if err != nil {
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klog.Errorf(util.Log(ctx, "failed to retrieve admin credentials: %v"), err)
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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defer cr.DeleteCredentials()
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if acquired := cs.VolumeLocks.TryAcquire(string(volID)); !acquired {
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klog.Errorf(util.Log(ctx, util.VolumeOperationAlreadyExistsFmt), volID)
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, string(volID))
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}
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defer cs.VolumeLocks.Release(string(volID))
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if err = purgeVolumeDeprecated(ctx, volID, cr, &ce.VolOptions); err != nil {
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klog.Errorf(util.Log(ctx, "failed to delete volume %s: %v"), volID, err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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if err = deleteCephUserDeprecated(ctx, &ce.VolOptions, cr, volID); err != nil {
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klog.Errorf(util.Log(ctx, "failed to delete ceph user for volume %s: %v"), volID, err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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if err = cs.MetadataStore.Delete(string(volID)); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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klog.V(4).Infof(util.Log(ctx, "cephfs: successfully deleted volume %s"), volID)
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return &csi.DeleteVolumeResponse{}, nil
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}
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// DeleteVolume deletes the volume in backend and its reservation
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func (cs *ControllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
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if err := cs.validateDeleteVolumeRequest(); err != nil {
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klog.Errorf(util.Log(ctx, "DeleteVolumeRequest validation failed: %v"), err)
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return nil, err
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}
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volID := volumeID(req.GetVolumeId())
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secrets := req.GetSecrets()
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// lock out parallel delete operations
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if acquired := cs.VolumeLocks.TryAcquire(string(volID)); !acquired {
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klog.Errorf(util.Log(ctx, util.VolumeOperationAlreadyExistsFmt), volID)
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, string(volID))
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}
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defer cs.VolumeLocks.Release(string(volID))
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// Find the volume using the provided VolumeID
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volOptions, vID, err := newVolumeOptionsFromVolID(ctx, string(volID), nil, secrets)
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if err != nil {
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// if error is ErrPoolNotFound, the pool is already deleted we dont
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// need to worry about deleting subvolume or omap data, return success
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if _, ok := err.(util.ErrPoolNotFound); ok {
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klog.Warningf(util.Log(ctx, "failed to get backend volume for %s: %v"), string(volID), err)
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return &csi.DeleteVolumeResponse{}, nil
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}
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// if error is ErrKeyNotFound, then a previous attempt at deletion was complete
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// or partially complete (subvolume and imageOMap are garbage collected already), hence
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// return success as deletion is complete
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if _, ok := err.(util.ErrKeyNotFound); ok {
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return &csi.DeleteVolumeResponse{}, nil
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}
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// ErrInvalidVolID may mean this is an 1.0.0 version volume
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if _, ok := err.(ErrInvalidVolID); ok && cs.MetadataStore != nil {
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return cs.deleteVolumeDeprecated(ctx, req)
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}
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// All errors other than ErrVolumeNotFound should return an error back to the caller
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if _, ok := err.(ErrVolumeNotFound); !ok {
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return nil, status.Error(codes.Internal, err.Error())
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}
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// If error is ErrImageNotFound then we failed to find the subvolume, but found the imageOMap
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// to lead us to the image, hence the imageOMap needs to be garbage collected, by calling
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// unreserve for the same
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if acquired := cs.VolumeLocks.TryAcquire(volOptions.RequestName); !acquired {
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, volOptions.RequestName)
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}
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defer cs.VolumeLocks.Release(volOptions.RequestName)
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if err = undoVolReservation(ctx, volOptions, *vID, secrets); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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return &csi.DeleteVolumeResponse{}, nil
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}
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// lock out parallel delete and create requests against the same volume name as we
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// cleanup the subvolume and associated omaps for the same
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if acquired := cs.VolumeLocks.TryAcquire(volOptions.RequestName); !acquired {
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, volOptions.RequestName)
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}
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defer cs.VolumeLocks.Release(string(volID))
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// Deleting a volume requires admin credentials
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cr, err := util.NewAdminCredentials(secrets)
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if err != nil {
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klog.Errorf(util.Log(ctx, "failed to retrieve admin credentials: %v"), err)
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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defer cr.DeleteCredentials()
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if err = purgeVolume(ctx, volumeID(vID.FsSubvolName), cr, volOptions); err != nil {
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klog.Errorf(util.Log(ctx, "failed to delete volume %s: %v"), volID, err)
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// All errors other than ErrVolumeNotFound should return an error back to the caller
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if _, ok := err.(ErrVolumeNotFound); !ok {
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return nil, status.Error(codes.Internal, err.Error())
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}
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}
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if err := undoVolReservation(ctx, volOptions, *vID, secrets); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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klog.V(4).Infof(util.Log(ctx, "cephfs: successfully deleted volume %s"), volID)
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return &csi.DeleteVolumeResponse{}, nil
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}
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// ValidateVolumeCapabilities checks whether the volume capabilities requested
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// are supported.
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func (cs *ControllerServer) ValidateVolumeCapabilities(
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ctx context.Context,
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req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
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// Cephfs doesn't support Block volume
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for _, cap := range req.VolumeCapabilities {
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if cap.GetBlock() != nil {
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return &csi.ValidateVolumeCapabilitiesResponse{Message: ""}, nil
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}
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}
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return &csi.ValidateVolumeCapabilitiesResponse{
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Confirmed: &csi.ValidateVolumeCapabilitiesResponse_Confirmed{
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VolumeCapabilities: req.VolumeCapabilities,
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},
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}, nil
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}
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// ControllerExpandVolume expands CephFS Volumes on demand based on resizer request
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func (cs *ControllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
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if err := cs.validateExpandVolumeRequest(req); err != nil {
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klog.Errorf(util.Log(ctx, "ControllerExpandVolumeRequest validation failed: %v"), err)
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return nil, err
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}
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volID := req.GetVolumeId()
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secret := req.GetSecrets()
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// lock out parallel delete operations
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if acquired := cs.VolumeLocks.TryAcquire(volID); !acquired {
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klog.Errorf(util.Log(ctx, util.VolumeOperationAlreadyExistsFmt), volID)
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return nil, status.Errorf(codes.Aborted, util.VolumeOperationAlreadyExistsFmt, volID)
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}
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defer cs.VolumeLocks.Release(volID)
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cr, err := util.NewAdminCredentials(secret)
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if err != nil {
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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defer cr.DeleteCredentials()
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volOptions, volIdentifier, err := newVolumeOptionsFromVolID(ctx, volID, nil, secret)
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if err != nil {
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klog.Errorf(util.Log(ctx, "validation and extraction of volume options failed: %v"), err)
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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RoundOffSize := util.RoundOffBytes(req.GetCapacityRange().GetRequiredBytes())
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if err = createVolume(ctx, volOptions, cr, volumeID(volIdentifier.FsSubvolName), RoundOffSize); err != nil {
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klog.Errorf(util.Log(ctx, "failed to expand volume %s: %v"), volumeID(volIdentifier.FsSubvolName), err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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return &csi.ControllerExpandVolumeResponse{
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CapacityBytes: RoundOffSize,
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NodeExpansionRequired: false,
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}, nil
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}
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