controllerserver.go

/*
Copyright 2020 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 sfs

import (
	"fmt"
	"time"

	"github.com/container-storage-interface/spec/lib/go/csi"
	"github.com/huaweicloud/golangsdk"
	"github.com/huaweicloud/golangsdk/openstack/sfs/v2/shares"
	"golang.org/x/net/context"
	"google.golang.org/grpc/codes"
	"google.golang.org/grpc/status"

	"k8s.io/klog"
)

type controllerServer struct {
	Driver *SfsDriver
}

func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
	klog.V(2).Infoln("*********** Creat Volume begin ***********")

	startTime := time.Now().UnixMilli()
	klog.V(2).Infof("CreateVolume called with request %v", *req)

	if err := validateCreateVolumeRequest(req); err != nil {
		return nil, status.Error(codes.InvalidArgument, err.Error())
	}

	client, err := cs.Driver.cloud.SFSV2Client()
	if err != nil {
		klog.V(2).Infof("Failed to create SFS v2 client: %v", err)
		return nil, status.Error(codes.Internal, err.Error())
	}

	requestedSize := req.GetCapacityRange().GetRequiredBytes()
	if requestedSize == 0 {
		// At least 1GiB
		requestedSize = 1 * bytesInGiB
	}

	sizeInGiB := bytesToGiB(requestedSize)

	// Creating a share
	createOpts := shares.CreateOpts{
		ShareProto: cs.Driver.shareProto,
		Size:       sizeInGiB,
		Name:       req.GetName(),
	}

	share, err := createShare(client, &createOpts)
	if err != nil {
		klog.V(2).Infof("Failed to create SFS volume %v: %v", *req, err)
		return nil, status.Error(codes.Internal, err.Error())
	}

	// Grant access to the share
	ruleStartTime := time.Now().UnixMilli()
	klog.V(2).Infof("Share: %v(ID: %v) creating an access ruleto VPC %s",
		share.Name, share.ID, cs.Driver.cloud.Vpc.Id)
	if err := grantAccess(client, share.ID, cs.Driver.cloud.Vpc.Id); err != nil {
		klog.V(2).Infof("%v(ID: %v) Failed to create access rule for share: %v", share.Name, share.ID, err)
		return nil, status.Error(codes.Internal, err.Error())
	}

	klog.V(2).Infof("Volume created for request %v, time used: %v (rule: %v) ms, VolumeId: %s, contentSource: %v, CapacityBytes: %v",
		*req, time.Now().UnixMilli()-startTime, time.Now().UnixMilli()-ruleStartTime, share.ID, req.GetVolumeContentSource(), time.Now().UnixMilli())

	klog.V(2).Infoln("*********** Create Volume over ***********")

	return &csi.CreateVolumeResponse{
		Volume: &csi.Volume{
			VolumeId:      share.ID,
			ContentSource: req.GetVolumeContentSource(),
			CapacityBytes: int64(sizeInGiB) * bytesInGiB,
		},
	}, nil
}

func (cs *controllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
	klog.V(2).Infoln("*********** Delete Volume begin ***********")

	klog.V(2).Infof("DeleteVolume called with request %v", *req)

	volID := req.GetVolumeId()
	if len(volID) == 0 {
		return nil, status.Error(codes.InvalidArgument, "DeleteVolume Volume ID must be provided")
	}

	client, err := cs.Driver.cloud.SFSV2Client()
	if err != nil {
		klog.V(3).Infof("Failed to create SFS v2 client: %v", err)
		return nil, status.Error(codes.Internal, err.Error())
	}
	err = deleteShare(client, volID)
	if err != nil {
		klog.V(3).Infof("Failed to DeleteVolume: %v", err)
		return nil, status.Error(codes.Internal, fmt.Sprintf("DeleteVolume failed with error %v", err))
	}

	klog.V(4).Infof("Delete volume %s", volID)

	klog.V(2).Infoln("*********** Delete Volume over ***********")

	return &csi.DeleteVolumeResponse{}, nil
}

func (cs *controllerServer) ControllerGetVolume(ctx context.Context, req *csi.ControllerGetVolumeRequest) (*csi.ControllerGetVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) ControllerPublishVolume(ctx context.Context, req *csi.ControllerPublishVolumeRequest) (*csi.ControllerPublishVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) ControllerUnpublishVolume(ctx context.Context, req *csi.ControllerUnpublishVolumeRequest) (*csi.ControllerUnpublishVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) ListVolumes(ctx context.Context, req *csi.ListVolumesRequest) (*csi.ListVolumesResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) CreateSnapshot(ctx context.Context, req *csi.CreateSnapshotRequest) (*csi.CreateSnapshotResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) DeleteSnapshot(ctx context.Context, req *csi.DeleteSnapshotRequest) (*csi.DeleteSnapshotResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

func (cs *controllerServer) ListSnapshots(ctx context.Context, req *csi.ListSnapshotsRequest) (*csi.ListSnapshotsResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

// ControllerGetCapabilities implements the default GRPC callout.
// Default supports all capabilities
func (cs *controllerServer) ControllerGetCapabilities(ctx context.Context, req *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error) {
	klog.V(2).Infof("ControllerGetCapabilities called with request %v", *req)

	return &csi.ControllerGetCapabilitiesResponse{
		Capabilities: cs.Driver.cscap,
	}, nil
}

func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
	klog.V(2).Infof("ValidateVolumeCapabilities called with args %+v", *req)

	reqVolCap := req.GetVolumeCapabilities()

	if reqVolCap == nil || len(reqVolCap) == 0 {
		return nil, status.Error(codes.InvalidArgument, "ValidateVolumeCapabilities Volume Capabilities must be provided")
	}
	volumeID := req.GetVolumeId()

	if len(volumeID) == 0 {
		return nil, status.Error(codes.InvalidArgument, "ValidateVolumeCapabilities Volume ID must be provided")
	}

	client, err := cs.Driver.cloud.SFSV2Client()
	if err != nil {
		klog.V(3).Infof("ValidateVolumeCapabilities Failed to create SFS v2 client: %v", err)
		return nil, status.Error(codes.Internal, err.Error())
	}

	_, err = getShare(client, volumeID)
	if err != nil {
		if _, ok := err.(golangsdk.ErrDefault404); ok {
			return nil, status.Error(codes.NotFound, fmt.Sprintf("ValidateVolumeCapabiltites Volume %s not found", volumeID))
		}
		return nil, status.Error(codes.Internal, fmt.Sprintf("ValidateVolumeCapabiltites %v", err))
	}

	for _, c := range reqVolCap {
		if c.GetAccessMode().Mode == csi.VolumeCapability_AccessMode_MULTI_NODE_SINGLE_WRITER {
			return &csi.ValidateVolumeCapabilitiesResponse{}, nil
		}
	}

	confirmed := &csi.ValidateVolumeCapabilitiesResponse_Confirmed{VolumeCapabilities: reqVolCap}
	return &csi.ValidateVolumeCapabilitiesResponse{Confirmed: confirmed}, nil
}

func (cs *controllerServer) GetCapacity(ctx context.Context, req *csi.GetCapacityRequest) (*csi.GetCapacityResponse, error) {
	return nil, status.Error(codes.Unimplemented, fmt.Sprintf("GetCapacity is not yet implemented"))
}

func (cs *controllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
	return nil, status.Error(codes.Unimplemented, "")
}

/*
func (cs *controllerServer) ControllerExpandVolume(ctx context.Context, req *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
	klog.V(4).Infof("ControllerExpandVolume: called with args %+v", *req)

	volumeID := req.GetVolumeId()
	if len(volumeID) == 0 {
		return nil, status.Error(codes.InvalidArgument, "Volume ID not provided")
	}
	cap := req.GetCapacityRange()
	if cap == nil {
		return nil, status.Error(codes.InvalidArgument, "Capacity range not provided")
	}

	volSizeBytes := int64(req.GetCapacityRange().GetRequiredBytes())
	volSizeGB := int(RoundUpSize(volSizeBytes, 1024*1024*1024))
	maxVolSize := cap.GetLimitBytes()

	if maxVolSize > 0 && maxVolSize < volSizeBytes {
		return nil, status.Error(codes.OutOfRange, "After round-up, volume size exceeds the limit specified")
	}

	client, err := cs.Driver.cloud.SFSV2Client()
    if err != nil {
		klog.V(3).Infof("Failed to create SFS v2 client: %v", err)
		return nil, status.Error(codes.Internal, err.Error())
    }

	_, err = getShare(client, volumeID)
	if err != nil {
		if _, ok := err.(golangsdk.ErrDefault404); ok {
			return nil, status.Error(codes.NotFound, "Volume not found")
		}
		return nil, status.Error(codes.Internal, fmt.Sprintf("GetVolume failed with error %v", err))
	}

	err = expandShare(client, volumeID, volSizeGB)
	if err != nil {
		return nil, status.Errorf(codes.Internal, fmt.Sprintf("Could not resize volume %q to size %v: %v", volumeID, volSizeGB, err))
	}

	klog.V(4).Infof("ControllerExpandVolume resized volume %v to size %v", volumeID, volSizeGB)

	return &csi.ControllerExpandVolumeResponse{
		CapacityBytes:         volSizeBytes,
		NodeExpansionRequired: true,
	}, nil
}
*/