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/
nodeserver.go
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/
nodeserver.go
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/**
* Copyright 2019 IBM Corp.
*
* 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 scale
import (
// "fmt"
"os"
"strings"
"sync"
// "path"
"github.com/golang/glog"
"golang.org/x/net/context"
"github.com/container-storage-interface/spec/lib/go/csi"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
// volumeutils "k8s.io/kubernetes/pkg/volume/util"
"k8s.io/kubernetes/pkg/util/mount"
)
type ScaleNodeServer struct {
Driver *ScaleDriver
Mounter *mount.SafeFormatAndMount
// TODO: Only lock mutually exclusive calls and make locking more fine grained
mux sync.Mutex
}
func (ns *ScaleNodeServer) NodePublishVolume(ctx context.Context, req *csi.NodePublishVolumeRequest) (*csi.NodePublishVolumeResponse, error) {
glog.V(3).Infof("nodeserver NodePublishVolume")
glog.V(4).Infof("NodePublishVolume called with req: %#v", req)
// Validate Arguments
targetPath := req.GetTargetPath()
volumeID := req.GetVolumeId()
volumeCapability := req.GetVolumeCapability()
if len(volumeID) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodePublishVolume Volume ID must be provided")
}
if len(targetPath) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodePublishVolume Target Path must be provided")
}
if volumeCapability == nil {
return nil, status.Error(codes.InvalidArgument, "NodePublishVolume Volume Capability must be provided")
}
/* <cluster_id>;<filesystem_uuid>;path=<symlink_path> */
splitVId := strings.Split(volumeID, ";")
if len(splitVId) < 3 {
return nil, status.Error(codes.InvalidArgument, "NodePublishVolume VolumeID is not in proper format")
}
index := 2
if len(splitVId) == 4 {
index = 3
}
SlnkPart := splitVId[index]
targetSlnkPath := strings.Split(SlnkPart, "=")
if len(targetSlnkPath) < 2 {
return nil, status.Error(codes.InvalidArgument, "NodePublishVolume VolumeID is not in proper format")
}
glog.Infof("Target SpectrumScale Symlink Path : %v\n", targetSlnkPath[1])
if _, err := os.Stat(targetPath); err == nil {
args := []string{targetPath}
outputBytes, err := executeCmd("rmdir", args)
glog.Infof("Cmd rmdir args: %v Output: %v", args, outputBytes)
if err != nil {
return nil, err
}
}
args := []string{"-sf", targetSlnkPath[1], targetPath}
outputBytes, err := executeCmd("/bin/ln", args)
glog.Infof("Cmd /bin/ln args: %v Output: %v", args, outputBytes)
if err != nil {
return nil, err
}
glog.V(4).Infof("Successfully mounted %s", targetPath)
return &csi.NodePublishVolumeResponse{}, nil
}
func (ns *ScaleNodeServer) NodeUnpublishVolume(ctx context.Context, req *csi.NodeUnpublishVolumeRequest) (*csi.NodeUnpublishVolumeResponse, error) {
glog.V(3).Infof("nodeserver NodeUnpublishVolume")
glog.V(4).Infof("NodeUnpublishVolume called with args: %v", req)
// Validate Arguments
targetPath := req.GetTargetPath()
volID := req.GetVolumeId()
if len(volID) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeUnpublishVolume Volume ID must be provided")
}
if len(targetPath) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeUnpublishVolume Target Path must be provided")
}
if err := os.RemoveAll(targetPath); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
return &csi.NodeUnpublishVolumeResponse{}, nil
}
func (ns *ScaleNodeServer) NodeStageVolume(ctx context.Context, req *csi.NodeStageVolumeRequest) (
*csi.NodeStageVolumeResponse, error) {
glog.V(3).Infof("nodeserver NodeStageVolume")
ns.mux.Lock()
defer ns.mux.Unlock()
glog.V(4).Infof("NodeStageVolume called with req: %#v", req)
// Validate Arguments
volumeID := req.GetVolumeId()
stagingTargetPath := req.GetStagingTargetPath()
volumeCapability := req.GetVolumeCapability()
if len(volumeID) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeStageVolume Volume ID must be provided")
}
if len(stagingTargetPath) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeStageVolume Staging Target Path must be provided")
}
if volumeCapability == nil {
return nil, status.Error(codes.InvalidArgument, "NodeStageVolume Volume Capability must be provided")
}
return &csi.NodeStageVolumeResponse{}, nil
}
func (ns *ScaleNodeServer) NodeUnstageVolume(ctx context.Context, req *csi.NodeUnstageVolumeRequest) (
*csi.NodeUnstageVolumeResponse, error) {
glog.V(3).Infof("nodeserver NodeUnstageVolume")
ns.mux.Lock()
defer ns.mux.Unlock()
glog.V(4).Infof("NodeUnstageVolume called with req: %#v", req)
// Validate arguments
volumeID := req.GetVolumeId()
stagingTargetPath := req.GetStagingTargetPath()
if len(volumeID) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeUnstageVolume Volume ID must be provided")
}
if len(stagingTargetPath) == 0 {
return nil, status.Error(codes.InvalidArgument, "NodeUnstageVolume Staging Target Path must be provided")
}
return &csi.NodeUnstageVolumeResponse{}, nil
}
func (ns *ScaleNodeServer) NodeGetCapabilities(ctx context.Context, req *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
glog.V(4).Infof("NodeGetCapabilities called with req: %#v", req)
return &csi.NodeGetCapabilitiesResponse{
Capabilities: ns.Driver.nscap,
}, nil
}
func (ns *ScaleNodeServer) NodeGetInfo(ctx context.Context, req *csi.NodeGetInfoRequest) (*csi.NodeGetInfoResponse, error) {
glog.V(4).Infof("NodeGetInfo called with req: %#v", req)
return &csi.NodeGetInfoResponse{
NodeId: ns.Driver.nodeID,
}, nil
}
func (ns *ScaleNodeServer) NodeExpandVolume(ctx context.Context, req *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
return nil, status.Error(codes.Unimplemented, "")
}
func (ns *ScaleNodeServer) NodeGetVolumeStats(ctx context.Context, req *csi.NodeGetVolumeStatsRequest) (*csi.NodeGetVolumeStatsResponse, error) {
return nil, status.Error(codes.Unimplemented, "")
}