mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-21 20:40:20 +00:00
243 lines
7.4 KiB
Go
243 lines
7.4 KiB
Go
/*
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Copyright 2018 The Kubernetes 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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"fmt"
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"os"
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"github.com/golang/glog"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"github.com/container-storage-interface/spec/lib/go/csi/v0"
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"github.com/kubernetes-csi/drivers/pkg/csi-common"
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)
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type nodeServer struct {
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*csicommon.DefaultNodeServer
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}
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func getCredentialsForVolume(volOptions *volumeOptions, volId volumeID, req *csi.NodeStageVolumeRequest) (*credentials, error) {
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var (
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userCr = &credentials{}
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err error
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)
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if volOptions.ProvisionVolume {
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// The volume is provisioned dynamically, get the credentials directly from Ceph
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// First, store admin credentials - those are needed for retrieving the user credentials
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adminCr, err := getAdminCredentials(req.GetNodeStageSecrets())
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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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if err = storeCephCredentials(volId, adminCr); err != nil {
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return nil, fmt.Errorf("failed to store ceph admin credentials: %v", err)
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}
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// Then get the ceph user
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entity, err := getCephUser(adminCr, volId)
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if err != nil {
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return nil, fmt.Errorf("failed to get ceph user: %v", err)
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}
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userCr = entity.toCredentials()
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} else {
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// The volume is pre-made, credentials are in node stage secrets
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userCr, err = getUserCredentials(req.GetNodeStageSecrets())
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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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if err = storeCephCredentials(volId, userCr); err != nil {
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return nil, fmt.Errorf("failed to store ceph user credentials: %v", err)
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}
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return userCr, nil
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}
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func (ns *nodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (*csi.NodeStageVolumeResponse, error) {
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if err := validateNodeStageVolumeRequest(req); err != nil {
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return nil, status.Error(codes.InvalidArgument, err.Error())
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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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volOptions, err := newVolumeOptions(req.GetVolumeAttributes())
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if err != nil {
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glog.Errorf("error reading volume options for volume %s: %v", volId, err)
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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if volOptions.ProvisionVolume {
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// Dynamically provisioned volumes don't have their root path set, do it here
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volOptions.RootPath = getVolumeRootPath_ceph(volId)
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}
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if err = createMountPoint(stagingTargetPath); err != nil {
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glog.Errorf("failed to create staging mount point at %s for volume %s: %v", stagingTargetPath, volId, err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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cephConf := cephConfigData{Monitors: volOptions.Monitors, VolumeID: volId}
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if err = cephConf.writeToFile(); err != nil {
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glog.Errorf("failed to write ceph config file to %s for volume %s: %v", getCephConfPath(volId), volId, err)
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return nil, status.Error(codes.Internal, err.Error())
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}
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// Check if the volume is already mounted
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isMnt, err := isMountPoint(stagingTargetPath)
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if err != nil {
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glog.Errorf("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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glog.Infof("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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cr, err := getCredentialsForVolume(volOptions, volId, req)
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if err != nil {
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glog.Errorf("failed to get ceph credentials 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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m, err := newMounter(volOptions)
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if err != nil {
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glog.Errorf("failed to create mounter for volume %s: %v", volId, err)
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}
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glog.V(4).Infof("cephfs: mounting volume %s with %s", volId, m.name())
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if err = m.mount(stagingTargetPath, cr, volOptions, volId); err != nil {
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glog.Errorf("failed to 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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glog.Infof("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 (ns *nodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
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if err := validateNodePublishVolumeRequest(req); err != nil {
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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// Configuration
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targetPath := req.GetTargetPath()
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volId := req.GetVolumeId()
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if err := createMountPoint(targetPath); err != nil {
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glog.Errorf("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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// Check if the volume is already mounted
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isMnt, err := isMountPoint(targetPath)
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if err != nil {
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glog.Errorf("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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glog.Infof("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(req.GetStagingTargetPath(), req.GetTargetPath(), req.GetReadonly()); err != nil {
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glog.Errorf("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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glog.Infof("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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func (ns *nodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
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if err := validateNodeUnpublishVolumeRequest(req); err != nil {
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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targetPath := req.GetTargetPath()
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// Unmount the bind-mount
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if err := unmountVolume(targetPath); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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os.Remove(targetPath)
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glog.Infof("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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func (ns *nodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (*csi.NodeUnstageVolumeResponse, error) {
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if err := validateNodeUnstageVolumeRequest(req); err != nil {
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return nil, status.Error(codes.InvalidArgument, err.Error())
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}
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stagingTargetPath := req.GetStagingTargetPath()
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// Unmount the volume
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if err := unmountVolume(stagingTargetPath); err != nil {
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return nil, status.Error(codes.Internal, err.Error())
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}
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os.Remove(stagingTargetPath)
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glog.Infof("cephfs: successfully umounted volume %s from %s", req.GetVolumeId(), stagingTargetPath)
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return &csi.NodeUnstageVolumeResponse{}, nil
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}
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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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}, nil
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}
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