Initial commit

pkg/s3/controllerserver.go

@@ -0,0 +1,128 @@
+/*
+Copyright 2017 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 s3
+
+import (
+	"fmt"
+
+	"github.com/golang/glog"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+
+	"github.com/container-storage-interface/spec/lib/go/csi/v0"
+	"github.com/kubernetes-csi/drivers/pkg/csi-common"
+)
+
+type controllerServer struct {
+	*csicommon.DefaultControllerServer
+	*s3
+}
+
+func (cs *controllerServer) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest) (*csi.CreateVolumeResponse, error) {
+	if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
+		glog.V(3).Infof("invalid create volume req: %v", req)
+		return nil, err
+	}
+
+	// Check arguments
+	if len(req.GetName()) == 0 {
+		return nil, status.Error(codes.InvalidArgument, "Name missing in request")
+	}
+	if req.GetVolumeCapabilities() == nil {
+		return nil, status.Error(codes.InvalidArgument, "Volume Capabilities missing in request")
+	}
+
+	volumeID := req.GetName()
+	glog.V(5).Infof("Got a request to create bucket %s", volumeID)
+
+	exists, err := cs.s3.client.bucketExists(volumeID)
+	if err != nil {
+		return nil, err
+	}
+	if !exists {
+		if err := cs.s3.client.createBucket(volumeID); err != nil {
+			glog.V(3).Infof("failed to create volume: %v", err)
+			return nil, err
+		}
+	}
+
+	glog.V(4).Infof("create volume %s", volumeID)
+	s3Vol := s3Volume{}
+	s3Vol.VolName = req.GetName()
+	s3Vol.VolID = volumeID
+	return &csi.CreateVolumeResponse{
+		Volume: &csi.Volume{
+			Id:            volumeID,
+			CapacityBytes: 0,
+			Attributes:    req.GetParameters(),
+		},
+	}, nil
+}
+
+func (cs *controllerServer) DeleteVolume(ctx context.Context, req *csi.DeleteVolumeRequest) (*csi.DeleteVolumeResponse, error) {
+
+	// Check arguments
+	if len(req.GetVolumeId()) == 0 {
+		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
+	}
+
+	if err := cs.Driver.ValidateControllerServiceRequest(csi.ControllerServiceCapability_RPC_CREATE_DELETE_VOLUME); err != nil {
+		glog.V(3).Infof("Invalid delete volume req: %v", req)
+		return nil, err
+	}
+	volumeID := req.VolumeId
+	glog.V(4).Infof("Deleting volume %s", volumeID)
+
+	exists, err := cs.s3.client.bucketExists(volumeID)
+	if err != nil {
+		return nil, err
+	}
+	if exists {
+		if err := cs.s3.client.removeBucket(volumeID); err != nil {
+			glog.V(3).Infof("Failed to remove volume: %v", err)
+			return nil, err
+		}
+	} else {
+		glog.V(5).Infof("Bucket %s does not exist, ignoring request", volumeID)
+	}
+
+	return &csi.DeleteVolumeResponse{}, nil
+}
+
+func (cs *controllerServer) ValidateVolumeCapabilities(ctx context.Context, req *csi.ValidateVolumeCapabilitiesRequest) (*csi.ValidateVolumeCapabilitiesResponse, error) {
+
+	// Check arguments
+	if len(req.GetVolumeId()) == 0 {
+		return nil, status.Error(codes.InvalidArgument, "Volume ID missing in request")
+	}
+	if req.GetVolumeCapabilities() == nil {
+		return nil, status.Error(codes.InvalidArgument, "Volume capabilities missing in request")
+	}
+
+	exists, err := cs.s3.client.bucketExists(req.GetVolumeId())
+	if err != nil {
+		return nil, err
+	}
+	if !exists {
+		// return an error if the volume requested does not exist
+		return nil, status.Error(codes.NotFound, fmt.Sprintf("Volume with id %s does not exist", req.GetVolumeId()))
+	}
+
+	// We currently support all capabilities
+	return &csi.ValidateVolumeCapabilitiesResponse{Supported: true}, nil
+}