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package driver
import (
"context"
"os"
"strings"
"sync"
"github.com/container-storage-interface/spec/lib/go/csi"
"github.com/seaweedfs/seaweedfs/weed/glog"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"k8s.io/mount-utils"
)
type NodeServer struct {
csi.UnimplementedNodeServer
Driver *SeaweedFsDriver
mounter mount.Interface
// information about the managed volumes
volumes sync.Map
volumeMutexes *KeyMutex
}
var _ = csi.NodeServer(&NodeServer{})
func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
volumeID := req.GetVolumeId()
// mount the fs here
stagingTargetPath := req.GetStagingTargetPath()
glog.Infof("node stage volume %s to %s", volumeID, stagingTargetPath)
// Check arguments
if req.GetVolumeCapability() == nil {
return nil, status.Error(codes.InvalidArgument, "Volume capability missing in request")
}
if !isValidVolumeCapabilities(ns.Driver.vcap, []*csi.VolumeCapability{req.GetVolumeCapability()}) {
// return nil, status.Error(codes.InvalidArgument, "Volume capability not supported")
}
if volumeID == "" {
return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
}
if stagingTargetPath == "" {
return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
}
volumeMutex := ns.getVolumeMutex(volumeID)
volumeMutex.Lock()
defer volumeMutex.Unlock()
// The volume has been staged.
if _, ok := ns.volumes.Load(volumeID); ok {
glog.Infof("volume %s has been already staged", volumeID)
return &csi.NodeStageVolumeResponse{}, nil
}
volContext := req.GetVolumeContext()
readOnly := isVolumeReadOnly(req)
mounter, err := newMounter(volumeID, readOnly, ns.Driver, volContext)
if err != nil {
// node stage is unsuccessfull
ns.removeVolumeMutex(volumeID)
return nil, err
}
volume := NewVolume(volumeID, mounter)
if err := volume.Stage(stagingTargetPath); err != nil {
// node stage is unsuccessfull
ns.removeVolumeMutex(volumeID)
if os.IsPermission(err) {
return nil, status.Error(codes.PermissionDenied, err.Error())
}
if strings.Contains(err.Error(), "invalid argument") {
return nil, status.Error(codes.InvalidArgument, err.Error())
}
return nil, status.Error(codes.Internal, err.Error())
}
ns.volumes.Store(volumeID, volume)
glog.Infof("volume %s successfully staged to %s", volumeID, stagingTargetPath)
return &csi.NodeStageVolumeResponse{}, nil
}
func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
volumeID := req.GetVolumeId()
targetPath := req.GetTargetPath()
stagingTargetPath := req.GetStagingTargetPath()
glog.Infof("node publish volume %s to %s", volumeID, targetPath)
// Check arguments
if req.GetVolumeCapability() == nil {
return nil, status.Error(codes.InvalidArgument, "Volume capability missing in request")
}
if !isValidVolumeCapabilities(ns.Driver.vcap, []*csi.VolumeCapability{req.GetVolumeCapability()}) {
// return nil, status.Error(codes.InvalidArgument, "Volume capability not supported")
}
if volumeID == "" {
return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
}
if targetPath == "" {
return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
}
if stagingTargetPath == "" {
return nil, status.Error(codes.InvalidArgument, "Staging target path missing in request")
}
volumeMutex := ns.getVolumeMutex(volumeID)
volumeMutex.Lock()
defer volumeMutex.Unlock()
volume, ok := ns.volumes.Load(volumeID)
if !ok {
return nil, status.Error(codes.FailedPrecondition, "volume hasn't been staged yet")
}
// When pod uses a volume in read-only mode, k8s will automatically
// mount the volume as a read-only file system.
if err := volume.(*Volume).Publish(stagingTargetPath, targetPath, req.GetReadonly()); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
glog.Infof("volume %s successfully published to %s", volumeID, targetPath)
return &csi.NodePublishVolumeResponse{}, nil
}
func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
volumeID := req.GetVolumeId()
targetPath := req.GetTargetPath()
glog.Infof("node unpublish volume %s from %s", volumeID, targetPath)
if volumeID == "" {
return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
}
if targetPath == "" {
return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
}
volumeMutex := ns.getVolumeMutex(volumeID)
volumeMutex.Lock()
defer volumeMutex.Unlock()
volume, ok := ns.volumes.Load(volumeID)
if !ok {
glog.Warningf("volume %s hasn't been published", volumeID)
// make sure there is no any garbage
_ = mount.CleanupMountPoint(targetPath, mountutil, true)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
if err := volume.(*Volume).Unpublish(targetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
glog.Infof("volume %s successfully unpublished from %s", volumeID, targetPath)
return &csi.NodeUnpublishVolumeResponse{}, nil
}
func (ns *NodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRequest) (*csi.NodeGetInfoResponse, error) {
glog.V(3).Infof("node get info, node id: %s", ns.Driver.nodeID)
return &csi.NodeGetInfoResponse{
NodeId: ns.Driver.nodeID,
}, nil
}
func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
glog.V(3).Infof("node get capabilities")
return &csi.NodeGetCapabilitiesResponse{
Capabilities: []*csi.NodeServiceCapability{
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
},
},
},
{
Type: &csi.NodeServiceCapability_Rpc{
Rpc: &csi.NodeServiceCapability_RPC{
Type: csi.NodeServiceCapability_RPC_EXPAND_VOLUME,
},
},
},
},
}, nil
}
func (ns *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
volumeID := req.GetVolumeId()
stagingTargetPath := req.GetStagingTargetPath()
glog.Infof("node unstage volume %s from %s", volumeID, stagingTargetPath)
// Check arguments
if volumeID == "" {
return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
}
if stagingTargetPath == "" {
return nil, status.Error(codes.InvalidArgument, "Target path missing in request")
}
volumeMutex := ns.getVolumeMutex(volumeID)
volumeMutex.Lock()
defer volumeMutex.Unlock()
volume, ok := ns.volumes.Load(volumeID)
if !ok {
glog.Warningf("volume %s hasn't been staged", volumeID)
// make sure there is no any garbage
_ = mount.CleanupMountPoint(stagingTargetPath, mountutil, true)
} else {
if err := volume.(*Volume).Unstage(stagingTargetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
} else {
ns.volumes.Delete(volumeID)
}
}
// remove mutex on successfull unstage
ns.volumeMutexes.RemoveMutex(volumeID)
glog.Infof("volume %s successfully unstaged from %s", volumeID, stagingTargetPath)
return &csi.NodeUnstageVolumeResponse{}, nil
}
func (ns *NodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
volumeID := req.GetVolumeId()
volumePath := req.GetVolumePath()
requiredBytes := req.GetCapacityRange().GetRequiredBytes()
glog.Infof("node expand volume %s to %d bytes", req.GetVolumeId(), requiredBytes)
if len(volumeID) == 0 {
return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
}
if len(volumePath) == 0 {
return nil, status.Error(codes.InvalidArgument, "Volume path missing in request")
}
// TODO Check if volume exists
// TODO Check if node exists
volumeMutex := ns.getVolumeMutex(volumeID)
volumeMutex.Lock()
defer volumeMutex.Unlock()
if volume, ok := ns.volumes.Load(volumeID); ok {
if err := volume.(*Volume).Expand(requiredBytes); err != nil {
return nil, err
}
}
return &csi.NodeExpandVolumeResponse{}, nil
}
func (ns *NodeServer) NodeCleanup() {
ns.volumes.Range(func(_, vol any) bool {
v := vol.(*Volume)
if len(v.StagedPath) > 0 {
glog.Infof("cleaning up volume %s at %s", v.VolumeId, v.StagedPath)
err := v.Unstage(v.StagedPath)
if err != nil {
glog.Warningf("error cleaning up volume %s at %s, err: %v", v.VolumeId, v.StagedPath, err)
}
}
return true
})
}
func (ns *NodeServer) getVolumeMutex(volumeID string) *sync.Mutex {
return ns.volumeMutexes.GetMutex(volumeID)
}
func (ns *NodeServer) removeVolumeMutex(volumeID string) {
ns.volumeMutexes.RemoveMutex(volumeID)
}
func isVolumeReadOnly(req *csi.NodeStageVolumeRequest) bool {
mode := req.GetVolumeCapability().GetAccessMode().Mode
readOnlyModes := []csi.VolumeCapability_AccessMode_Mode{
csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY,
csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY,
}
for _, readOnlyMode := range readOnlyModes {
if mode == readOnlyMode {
return true
}
}
return false
}
|
