mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-10 00:10:20 +00:00
330 lines
11 KiB
Go
330 lines
11 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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"errors"
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"fmt"
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"os"
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"strings"
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csicommon "github.com/ceph/ceph-csi/internal/csi-common"
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"github.com/ceph/ceph-csi/internal/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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klog "k8s.io/klog/v2"
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)
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// NodeServer struct of ceph CSI driver with supported methods of CSI
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// node server spec.
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type NodeServer struct {
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*csicommon.DefaultNodeServer
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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) return an Aborted error
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VolumeLocks *util.VolumeLocks
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}
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func getCredentialsForVolume(volOptions *volumeOptions, req *csi.NodeStageVolumeRequest) (*util.Credentials, error) {
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var (
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err error
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cr *util.Credentials
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secrets = req.GetSecrets()
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)
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if volOptions.ProvisionVolume {
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// The volume is provisioned dynamically, use passed in admin credentials
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cr, err = util.NewAdminCredentials(secrets)
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if err != nil {
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return nil, fmt.Errorf("failed to get admin credentials from node stage secrets: %v", err)
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}
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} else {
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// The volume is pre-made, credentials are in node stage secrets
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cr, err = util.NewUserCredentials(req.GetSecrets())
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if err != nil {
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return nil, fmt.Errorf("failed to get user credentials from node stage secrets: %v", err)
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}
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}
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return cr, nil
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}
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// NodeStageVolume mounts the volume to a staging path on the node.
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func (ns *NodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
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var (
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volOptions *volumeOptions
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)
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if err := util.ValidateNodeStageVolumeRequest(req); err != nil {
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return nil, err
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}
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// Configuration
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stagingTargetPath := req.GetStagingTargetPath()
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volID := volumeID(req.GetVolumeId())
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if acquired := ns.VolumeLocks.TryAcquire(req.GetVolumeId()); !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, req.GetVolumeId())
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}
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defer ns.VolumeLocks.Release(req.GetVolumeId())
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volOptions, _, err := newVolumeOptionsFromVolID(ctx, string(volID), req.GetVolumeContext(), req.GetSecrets())
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if err != nil {
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var eivi ErrInvalidVolID
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if !errors.As(err, &eivi) {
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return nil, status.Error(codes.Internal, err.Error())
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}
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// check for pre-provisioned volumes (plugin versions > 1.0.0)
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volOptions, _, err = newVolumeOptionsFromStaticVolume(string(volID), req.GetVolumeContext())
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if err != nil {
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var ensv ErrNonStaticVolume
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if !errors.As(err, &ensv) {
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return nil, status.Error(codes.Internal, err.Error())
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}
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// check for volumes from plugin versions <= 1.0.0
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volOptions, _, err = newVolumeOptionsFromVersion1Context(string(volID), req.GetVolumeContext(),
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req.GetSecrets())
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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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}
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}
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// Check if the volume is already mounted
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isMnt, err := util.IsMountPoint(stagingTargetPath)
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if err != nil {
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klog.Errorf(util.Log(ctx, "stat failed: %v"), err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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if isMnt {
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klog.V(4).Infof(util.Log(ctx, "cephfs: volume %s is already mounted to %s, skipping"), volID, stagingTargetPath)
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return &csi.NodeStageVolumeResponse{}, nil
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}
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// It's not, mount now
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if err = ns.mount(ctx, volOptions, req); 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 mounted volume %s to %s"), volID, stagingTargetPath)
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return &csi.NodeStageVolumeResponse{}, nil
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}
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func (*NodeServer) mount(ctx context.Context, volOptions *volumeOptions, req *csi.NodeStageVolumeRequest) error {
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stagingTargetPath := req.GetStagingTargetPath()
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volID := volumeID(req.GetVolumeId())
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cr, err := getCredentialsForVolume(volOptions, req)
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if err != nil {
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klog.Errorf(util.Log(ctx, "failed to get ceph credentials for volume %s: %v"), volID, err)
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return status.Error(codes.Internal, err.Error())
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}
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defer cr.DeleteCredentials()
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m, err := newMounter(volOptions)
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if err != nil {
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klog.Errorf(util.Log(ctx, "failed to create mounter for volume %s: %v"), volID, err)
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return status.Error(codes.Internal, err.Error())
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}
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klog.V(4).Infof(util.Log(ctx, "cephfs: mounting volume %s with %s"), volID, m.name())
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readOnly := "ro"
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fuseMountOptions := strings.Split(volOptions.FuseMountOptions, ",")
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kernelMountOptions := strings.Split(volOptions.KernelMountOptions, ",")
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if req.VolumeCapability.AccessMode.Mode == csi.VolumeCapability_AccessMode_MULTI_NODE_READER_ONLY ||
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req.VolumeCapability.AccessMode.Mode == csi.VolumeCapability_AccessMode_SINGLE_NODE_READER_ONLY {
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switch m.(type) {
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case *fuseMounter:
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if !csicommon.MountOptionContains(strings.Split(volOptions.FuseMountOptions, ","), readOnly) {
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volOptions.FuseMountOptions = util.MountOptionsAdd(volOptions.FuseMountOptions, readOnly)
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fuseMountOptions = append(fuseMountOptions, readOnly)
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}
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case *kernelMounter:
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if !csicommon.MountOptionContains(strings.Split(volOptions.KernelMountOptions, ","), readOnly) {
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volOptions.KernelMountOptions = util.MountOptionsAdd(volOptions.KernelMountOptions, readOnly)
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kernelMountOptions = append(kernelMountOptions, readOnly)
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}
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}
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}
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if err = m.mount(ctx, stagingTargetPath, cr, volOptions); err != nil {
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klog.Errorf(util.Log(ctx,
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"failed to mount volume %s: %v Check dmesg logs if required."),
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volID,
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err)
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return status.Error(codes.Internal, err.Error())
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}
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if !csicommon.MountOptionContains(kernelMountOptions, readOnly) && !csicommon.MountOptionContains(fuseMountOptions, readOnly) {
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// #nosec - allow anyone to write inside the stagingtarget path
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err = os.Chmod(stagingTargetPath, 0777)
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if err != nil {
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klog.Errorf(util.Log(ctx, "failed to change stagingtarget path %s permission for volume %s: %v"), stagingTargetPath, volID, err)
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uErr := unmountVolume(ctx, stagingTargetPath)
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if uErr != nil {
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klog.Errorf(util.Log(ctx, "failed to umount stagingtarget path %s for volume %s: %v"), stagingTargetPath, volID, uErr)
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}
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return status.Error(codes.Internal, err.Error())
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}
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}
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return nil
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}
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// NodePublishVolume mounts the volume mounted to the staging path to the target
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// path
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func (ns *NodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
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mountOptions := []string{"bind", "_netdev"}
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if err := util.ValidateNodePublishVolumeRequest(req); err != nil {
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return nil, err
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}
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targetPath := req.GetTargetPath()
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volID := req.GetVolumeId()
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if acquired := ns.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 ns.VolumeLocks.Release(volID)
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if err := util.CreateMountPoint(targetPath); err != nil {
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klog.Errorf(util.Log(ctx, "failed to create mount point at %s: %v"), targetPath, err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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if req.GetReadonly() {
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mountOptions = append(mountOptions, "ro")
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}
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mountOptions = csicommon.ConstructMountOptions(mountOptions, req.GetVolumeCapability())
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// Check if the volume is already mounted
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isMnt, err := util.IsMountPoint(targetPath)
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if err != nil {
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klog.Errorf(util.Log(ctx, "stat failed: %v"), err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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if isMnt {
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klog.V(4).Infof(util.Log(ctx, "cephfs: volume %s is already bind-mounted to %s"), volID, targetPath)
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return &csi.NodePublishVolumeResponse{}, nil
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}
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// It's not, mount now
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if err = bindMount(ctx, req.GetStagingTargetPath(), req.GetTargetPath(), req.GetReadonly(), mountOptions); err != nil {
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klog.Errorf(util.Log(ctx, "failed to bind-mount 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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klog.V(4).Infof(util.Log(ctx, "cephfs: successfully bind-mounted volume %s to %s"), volID, targetPath)
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return &csi.NodePublishVolumeResponse{}, nil
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}
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// NodeUnpublishVolume unmounts the volume from the target path
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func (ns *NodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
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var err error
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if err = util.ValidateNodeUnpublishVolumeRequest(req); err != nil {
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return nil, err
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}
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volID := req.GetVolumeId()
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targetPath := req.GetTargetPath()
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if acquired := ns.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 ns.VolumeLocks.Release(volID)
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// Unmount the bind-mount
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if err = unmountVolume(ctx, targetPath); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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err = os.Remove(targetPath)
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if err != nil && !os.IsNotExist(err) {
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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 unbinded volume %s from %s"), req.GetVolumeId(), targetPath)
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return &csi.NodeUnpublishVolumeResponse{}, nil
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}
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// NodeUnstageVolume unstages the volume from the staging path
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func (ns *NodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
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var err error
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if err = util.ValidateNodeUnstageVolumeRequest(req); err != nil {
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return nil, err
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}
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volID := req.GetVolumeId()
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if acquired := ns.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 ns.VolumeLocks.Release(volID)
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stagingTargetPath := req.GetStagingTargetPath()
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// Unmount the volume
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if err = unmountVolume(ctx, stagingTargetPath); 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 unmounted volume %s from %s"), req.GetVolumeId(), stagingTargetPath)
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return &csi.NodeUnstageVolumeResponse{}, nil
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}
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// NodeGetCapabilities returns the supported capabilities of the node server
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func (ns *NodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
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return &csi.NodeGetCapabilitiesResponse{
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Capabilities: []*csi.NodeServiceCapability{
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{
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Type: &csi.NodeServiceCapability_Rpc{
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Rpc: &csi.NodeServiceCapability_RPC{
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Type: csi.NodeServiceCapability_RPC_STAGE_UNSTAGE_VOLUME,
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},
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},
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},
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{
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Type: &csi.NodeServiceCapability_Rpc{
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Rpc: &csi.NodeServiceCapability_RPC{
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Type: csi.NodeServiceCapability_RPC_GET_VOLUME_STATS,
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},
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},
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},
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},
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}, nil
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}
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