mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-23 13:30:23 +00:00
460 lines
16 KiB
Go
460 lines
16 KiB
Go
/*
|
|
Copyright 2018 The Kubernetes 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 rbd
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"syscall"
|
|
"time"
|
|
|
|
"github.com/ceph/ceph-csi/pkg/util"
|
|
|
|
"github.com/container-storage-interface/spec/lib/go/csi/v0"
|
|
"github.com/golang/glog"
|
|
"github.com/kubernetes-csi/drivers/pkg/csi-common"
|
|
"github.com/pborman/uuid"
|
|
"github.com/pkg/errors"
|
|
"golang.org/x/net/context"
|
|
"google.golang.org/grpc/codes"
|
|
"google.golang.org/grpc/status"
|
|
)
|
|
|
|
const (
|
|
oneGB = 1073741824
|
|
)
|
|
|
|
type controllerServer struct {
|
|
*csicommon.DefaultControllerServer
|
|
MetadataStore util.CachePersister
|
|
}
|
|
|
|
var (
|
|
rbdVolumes = map[string]*rbdVolume{}
|
|
rbdSnapshots = map[string]*rbdSnapshot{}
|
|
)
|
|
|
|
func (cs *controllerServer) LoadExDataFromMetadataStore() error {
|
|
vol := &rbdVolume{}
|
|
cs.MetadataStore.ForAll("csi-rbd-vol-", vol, func(identifier string) error {
|
|
rbdVolumes[identifier] = vol
|
|
return nil
|
|
})
|
|
|
|
snap := &rbdSnapshot{}
|
|
cs.MetadataStore.ForAll("csi-rbd-(.*)-snap-", snap, func(identifier string) error {
|
|
rbdSnapshots[identifier] = snap
|
|
return nil
|
|
})
|
|
glog.Infof("Loaded %d volumes and %d snapshots from metadata store", len(rbdVolumes), len(rbdSnapshots))
|
|
return nil
|
|
}
|
|
|
|
func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
|
|
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
|
|
glog.V(3).Infof("invalid create volume req: %v", req)
|
|
return nil, err
|
|
}
|
|
// Check sanity of request Name, Volume Capabilities
|
|
if len(req.Name) == 0 {
|
|
return nil, status.Error(codes.InvalidArgument, "Volume Name cannot be empty")
|
|
}
|
|
if req.VolumeCapabilities == nil {
|
|
return nil, status.Error(codes.InvalidArgument, "Volume Capabilities cannot be empty")
|
|
}
|
|
for _, cap := range req.VolumeCapabilities {
|
|
if cap.GetBlock() != nil {
|
|
return nil, status.Error(codes.Unimplemented, "Block Volume not supported")
|
|
}
|
|
}
|
|
|
|
volumeNameMutex.LockKey(req.GetName())
|
|
defer volumeNameMutex.UnlockKey(req.GetName())
|
|
|
|
// Need to check for already existing volume name, and if found
|
|
// check for the requested capacity and already allocated capacity
|
|
if exVol, err := getRBDVolumeByName(req.GetName()); err == nil {
|
|
// Since err is nil, it means the volume with the same name already exists
|
|
// need to check if the size of existing volume is the same as in new
|
|
// request
|
|
if exVol.VolSize >= int64(req.GetCapacityRange().GetRequiredBytes()) {
|
|
// existing volume is compatible with new request and should be reused.
|
|
// TODO (sbezverk) Do I need to make sure that RBD volume still exists?
|
|
return &csi.CreateVolumeResponse{
|
|
Volume: &csi.Volume{
|
|
Id: exVol.VolID,
|
|
CapacityBytes: int64(exVol.VolSize),
|
|
Attributes: req.GetParameters(),
|
|
},
|
|
}, nil
|
|
}
|
|
return nil, status.Errorf(codes.AlreadyExists, "Volume with the same name: %s but with different size already exist", req.GetName())
|
|
}
|
|
|
|
// TODO (sbezverk) Last check for not exceeding total storage capacity
|
|
|
|
rbdVol, err := getRBDVolumeOptions(req.GetParameters())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Generating Volume Name and Volume ID, as according to CSI spec they MUST be different
|
|
volName := req.GetName()
|
|
uniqueID := uuid.NewUUID().String()
|
|
if len(volName) == 0 {
|
|
volName = rbdVol.Pool + "-dynamic-pvc-" + uniqueID
|
|
}
|
|
rbdVol.VolName = volName
|
|
volumeID := "csi-rbd-vol-" + uniqueID
|
|
rbdVol.VolID = volumeID
|
|
// Volume Size - Default is 1 GiB
|
|
volSizeBytes := int64(oneGB)
|
|
if req.GetCapacityRange() != nil {
|
|
volSizeBytes = int64(req.GetCapacityRange().GetRequiredBytes())
|
|
}
|
|
rbdVol.VolSize = volSizeBytes
|
|
volSizeGB := int(volSizeBytes / 1024 / 1024 / 1024)
|
|
|
|
// Check if there is already RBD image with requested name
|
|
found, _, _ := rbdStatus(rbdVol, rbdVol.UserId, req.GetControllerCreateSecrets())
|
|
if !found {
|
|
// if VolumeContentSource is not nil, this request is for snapshot
|
|
if req.VolumeContentSource != nil {
|
|
snapshot := req.VolumeContentSource.GetSnapshot()
|
|
if snapshot == nil {
|
|
return nil, status.Error(codes.InvalidArgument, "Volume Snapshot cannot be empty")
|
|
}
|
|
|
|
snapshotID := snapshot.GetId()
|
|
if len(snapshotID) == 0 {
|
|
return nil, status.Error(codes.InvalidArgument, "Volume Snapshot ID cannot be empty")
|
|
}
|
|
|
|
rbdSnap := &rbdSnapshot{}
|
|
if err := cs.MetadataStore.Get(snapshotID, rbdSnap); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
err = restoreSnapshot(rbdVol, rbdSnap, rbdVol.AdminId, req.GetControllerCreateSecrets())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
glog.V(4).Infof("create volume %s from snapshot %s", volName, rbdSnap.SnapName)
|
|
} else {
|
|
if err := createRBDImage(rbdVol, volSizeGB, rbdVol.AdminId, req.GetControllerCreateSecrets()); err != nil {
|
|
if err != nil {
|
|
glog.Warningf("failed to create volume: %v", err)
|
|
return nil, err
|
|
}
|
|
}
|
|
glog.V(4).Infof("create volume %s", volName)
|
|
}
|
|
}
|
|
if err := cs.MetadataStore.Create(volumeID, rbdVol); err != nil {
|
|
glog.Warningf("failed to store volume metadata with error: %v", err)
|
|
if err := deleteRBDImage(rbdVol, rbdVol.AdminId, req.GetControllerCreateSecrets()); err != nil {
|
|
glog.V(3).Infof("failed to delete rbd image: %s/%s with error: %v", rbdVol.Pool, rbdVol.VolName, err)
|
|
return nil, err
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
rbdVolumes[volumeID] = rbdVol
|
|
return &csi.CreateVolumeResponse{
|
|
Volume: &csi.Volume{
|
|
Id: volumeID,
|
|
CapacityBytes: int64(volSizeBytes),
|
|
Attributes: req.GetParameters(),
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
|
|
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
|
|
glog.Warningf("invalid delete volume req: %v", req)
|
|
return nil, err
|
|
}
|
|
// For now the image get unconditionally deleted, but here retention policy can be checked
|
|
volumeID := req.GetVolumeId()
|
|
volumeIDMutex.LockKey(volumeID)
|
|
defer volumeIDMutex.UnlockKey(volumeID)
|
|
|
|
rbdVol := &rbdVolume{}
|
|
if err := cs.MetadataStore.Get(volumeID, rbdVol); err != nil {
|
|
if os.IsNotExist(errors.Cause(err)) {
|
|
return &csi.DeleteVolumeResponse{}, nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
volName := rbdVol.VolName
|
|
// Deleting rbd image
|
|
glog.V(4).Infof("deleting volume %s", volName)
|
|
if err := deleteRBDImage(rbdVol, rbdVol.AdminId, req.GetControllerDeleteSecrets()); err != nil {
|
|
// TODO: can we detect "already deleted" situations here and proceed?
|
|
glog.V(3).Infof("failed to delete rbd image: %s/%s with error: %v", rbdVol.Pool, volName, err)
|
|
return nil, err
|
|
}
|
|
|
|
if err := cs.MetadataStore.Delete(volumeID); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
delete(rbdVolumes, volumeID)
|
|
return &csi.DeleteVolumeResponse{}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
|
|
for _, cap := range req.VolumeCapabilities {
|
|
if cap.GetAccessMode().GetMode() != csi.VolumeCapability_AccessMode_SINGLE_NODE_WRITER {
|
|
return &csi.ValidateVolumeCapabilitiesResponse{Supported: false, Message: ""}, nil
|
|
}
|
|
}
|
|
return &csi.ValidateVolumeCapabilitiesResponse{Supported: true, Message: ""}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error) {
|
|
return &csi.ControllerUnpublishVolumeResponse{}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error) {
|
|
return &csi.ControllerPublishVolumeResponse{}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
|
|
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT); err != nil {
|
|
glog.Warningf("invalid create snapshot req: %v", req)
|
|
return nil, err
|
|
}
|
|
|
|
// Check sanity of request Snapshot Name, Source Volume Id
|
|
if len(req.Name) == 0 {
|
|
return nil, status.Error(codes.InvalidArgument, "Snapshot Name cannot be empty")
|
|
}
|
|
if len(req.SourceVolumeId) == 0 {
|
|
return nil, status.Error(codes.InvalidArgument, "Source Volume ID cannot be empty")
|
|
}
|
|
|
|
snapshotNameMutex.LockKey(req.GetName())
|
|
defer snapshotNameMutex.UnlockKey(req.GetName())
|
|
|
|
// Need to check for already existing snapshot name, and if found
|
|
// check for the requested source volume id and already allocated source volume id
|
|
if exSnap, err := getRBDSnapshotByName(req.GetName()); err == nil {
|
|
if req.SourceVolumeId == exSnap.SourceVolumeID {
|
|
return &csi.CreateSnapshotResponse{
|
|
Snapshot: &csi.Snapshot{
|
|
SizeBytes: exSnap.SizeBytes,
|
|
Id: exSnap.SnapID,
|
|
SourceVolumeId: exSnap.SourceVolumeID,
|
|
CreatedAt: exSnap.CreatedAt,
|
|
Status: &csi.SnapshotStatus{
|
|
Type: csi.SnapshotStatus_READY,
|
|
},
|
|
},
|
|
}, nil
|
|
}
|
|
return nil, status.Errorf(codes.AlreadyExists, "Snapshot with the same name: %s but with different source volume id already exist", req.GetName())
|
|
}
|
|
|
|
rbdSnap, err := getRBDSnapshotOptions(req.GetParameters())
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Generating Snapshot Name and Snapshot ID, as according to CSI spec they MUST be different
|
|
snapName := req.GetName()
|
|
uniqueID := uuid.NewUUID().String()
|
|
rbdVolume, err := getRBDVolumeByID(req.GetSourceVolumeId())
|
|
if err != nil {
|
|
return nil, status.Errorf(codes.NotFound, "Source Volume ID %s cannot found", req.GetSourceVolumeId())
|
|
}
|
|
if !hasSnapshotFeature(rbdVolume.ImageFeatures) {
|
|
return nil, fmt.Errorf("Volume(%s) has not snapshot feature(layering)", req.GetSourceVolumeId())
|
|
}
|
|
|
|
rbdSnap.VolName = rbdVolume.VolName
|
|
rbdSnap.SnapName = snapName
|
|
snapshotID := "csi-rbd-" + rbdVolume.VolName + "-snap-" + uniqueID
|
|
rbdSnap.SnapID = snapshotID
|
|
rbdSnap.SourceVolumeID = req.GetSourceVolumeId()
|
|
rbdSnap.SizeBytes = rbdVolume.VolSize
|
|
|
|
err = createSnapshot(rbdSnap, rbdSnap.AdminId, req.GetCreateSnapshotSecrets())
|
|
// if we already have the snapshot, return the snapshot
|
|
if err != nil {
|
|
if exitErr, ok := err.(*exec.ExitError); ok {
|
|
if status, ok := exitErr.Sys().(syscall.WaitStatus); ok {
|
|
if status.ExitStatus() == int(syscall.EEXIST) {
|
|
glog.Warningf("Snapshot with the same name: %s, we return this.", req.GetName())
|
|
} else {
|
|
glog.Warningf("failed to create snapshot: %v", err)
|
|
return nil, err
|
|
}
|
|
} else {
|
|
glog.Warningf("failed to create snapshot: %v", err)
|
|
return nil, err
|
|
}
|
|
} else {
|
|
glog.Warningf("failed to create snapshot: %v", err)
|
|
return nil, err
|
|
}
|
|
} else {
|
|
glog.V(4).Infof("create snapshot %s", snapName)
|
|
err = protectSnapshot(rbdSnap, rbdSnap.AdminId, req.GetCreateSnapshotSecrets())
|
|
|
|
if err != nil {
|
|
err = deleteSnapshot(rbdSnap, rbdSnap.AdminId, req.GetCreateSnapshotSecrets())
|
|
if err != nil {
|
|
return nil, fmt.Errorf("snapshot is created but failed to protect and delete snapshot: %v", err)
|
|
}
|
|
return nil, errors.New("snapshot is created but failed to protect snapshot")
|
|
}
|
|
}
|
|
|
|
rbdSnap.CreatedAt = time.Now().UnixNano()
|
|
|
|
if err := cs.MetadataStore.Create(snapshotID, rbdSnap); err != nil {
|
|
glog.Warningf("rbd: failed to store snapInfo with error: %v", err)
|
|
// Unprotect snapshot
|
|
err := unprotectSnapshot(rbdSnap, rbdSnap.AdminId, req.GetCreateSnapshotSecrets())
|
|
if err != nil {
|
|
return nil, status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to unprotect snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
|
|
}
|
|
// Deleting snapshot
|
|
glog.V(4).Infof("deleting Snaphot %s", rbdSnap.SnapName)
|
|
if err := deleteSnapshot(rbdSnap, rbdSnap.AdminId, req.GetCreateSnapshotSecrets()); err != nil {
|
|
return nil, status.Errorf(codes.Unknown, "This Snapshot should be removed but failed to delete snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
rbdSnapshots[snapshotID] = rbdSnap
|
|
return &csi.CreateSnapshotResponse{
|
|
Snapshot: &csi.Snapshot{
|
|
SizeBytes: rbdSnap.SizeBytes,
|
|
Id: snapshotID,
|
|
SourceVolumeId: req.GetSourceVolumeId(),
|
|
CreatedAt: rbdSnap.CreatedAt,
|
|
Status: &csi.SnapshotStatus{
|
|
Type: csi.SnapshotStatus_READY,
|
|
},
|
|
},
|
|
}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {
|
|
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_SNAPSHOT); err != nil {
|
|
glog.Warningf("invalid delete snapshot req: %v", req)
|
|
return nil, err
|
|
}
|
|
|
|
snapshotID := req.GetSnapshotId()
|
|
if len(snapshotID) == 0 {
|
|
return nil, status.Error(codes.InvalidArgument, "Snapshot ID cannot be empty")
|
|
}
|
|
snapshotIDMutex.LockKey(snapshotID)
|
|
defer snapshotIDMutex.UnlockKey(snapshotID)
|
|
|
|
rbdSnap := &rbdSnapshot{}
|
|
if err := cs.MetadataStore.Get(snapshotID, rbdSnap); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Unprotect snapshot
|
|
err := unprotectSnapshot(rbdSnap, rbdSnap.AdminId, req.GetDeleteSnapshotSecrets())
|
|
if err != nil {
|
|
return nil, status.Errorf(codes.FailedPrecondition, "failed to unprotect snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
|
|
}
|
|
|
|
// Deleting snapshot
|
|
glog.V(4).Infof("deleting Snaphot %s", rbdSnap.SnapName)
|
|
if err := deleteSnapshot(rbdSnap, rbdSnap.AdminId, req.GetDeleteSnapshotSecrets()); err != nil {
|
|
return nil, status.Errorf(codes.FailedPrecondition, "failed to delete snapshot: %s/%s with error: %v", rbdSnap.Pool, rbdSnap.SnapName, err)
|
|
}
|
|
|
|
if err := cs.MetadataStore.Delete(snapshotID); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
delete(rbdSnapshots, snapshotID)
|
|
|
|
return &csi.DeleteSnapshotResponse{}, nil
|
|
}
|
|
|
|
func (cs *controllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
|
|
if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_LIST_SNAPSHOTS); err != nil {
|
|
glog.Warningf("invalid list snapshot req: %v", req)
|
|
return nil, err
|
|
}
|
|
|
|
sourceVolumeId := req.GetSourceVolumeId()
|
|
|
|
// TODO (sngchlko) list with token
|
|
// TODO (#94) protect concurrent access to global data structures
|
|
|
|
// list only a specific snapshot which has snapshot ID
|
|
if snapshotID := req.GetSnapshotId(); len(snapshotID) != 0 {
|
|
if rbdSnap, ok := rbdSnapshots[snapshotID]; ok {
|
|
// if source volume ID also set, check source volume id on the cache.
|
|
if len(sourceVolumeId) != 0 && rbdSnap.SourceVolumeID != sourceVolumeId {
|
|
return nil, status.Errorf(codes.Unknown, "Requested Source Volume ID %s is different from %s", sourceVolumeId, rbdSnap.SourceVolumeID)
|
|
}
|
|
return &csi.ListSnapshotsResponse{
|
|
Entries: []*csi.ListSnapshotsResponse_Entry{
|
|
{
|
|
Snapshot: &csi.Snapshot{
|
|
SizeBytes: rbdSnap.SizeBytes,
|
|
Id: rbdSnap.SnapID,
|
|
SourceVolumeId: rbdSnap.SourceVolumeID,
|
|
CreatedAt: rbdSnap.CreatedAt,
|
|
Status: &csi.SnapshotStatus{
|
|
Type: csi.SnapshotStatus_READY,
|
|
},
|
|
},
|
|
},
|
|
},
|
|
}, nil
|
|
}
|
|
return nil, status.Errorf(codes.NotFound, "Snapshot ID %s cannot found", snapshotID)
|
|
}
|
|
|
|
entries := []*csi.ListSnapshotsResponse_Entry{}
|
|
for _, rbdSnap := range rbdSnapshots {
|
|
// if source volume ID also set, check source volume id on the cache.
|
|
if len(sourceVolumeId) != 0 && rbdSnap.SourceVolumeID != sourceVolumeId {
|
|
continue
|
|
}
|
|
entries = append(entries, &csi.ListSnapshotsResponse_Entry{
|
|
Snapshot: &csi.Snapshot{
|
|
SizeBytes: rbdSnap.SizeBytes,
|
|
Id: rbdSnap.SnapID,
|
|
SourceVolumeId: rbdSnap.SourceVolumeID,
|
|
CreatedAt: rbdSnap.CreatedAt,
|
|
Status: &csi.SnapshotStatus{
|
|
Type: csi.SnapshotStatus_READY,
|
|
},
|
|
},
|
|
})
|
|
}
|
|
|
|
return &csi.ListSnapshotsResponse{
|
|
Entries: entries,
|
|
}, nil
|
|
}
|