Implement support for storage class parameter - volume type

Fixes: #63

pkg/cloud/cloud.go

@@ -36,36 +36,41 @@ import (
 	"k8s.io/apimachinery/pkg/util/wait"
 )
 
+// AWS volume types
 const (
-	// DefaultVolumeSize represents the default volume size.
-	// TODO: what should be the default size?
-	DefaultVolumeSize int64 = 1 * 1024 * 1024 * 1024
-
-	// VolumeNameTagKey is the key value that refers to the volume's name.
-	VolumeNameTagKey = "com.amazon.aws.csi.volume"
-
 	// VolumeTypeIO1 represents a provisioned IOPS SSD type of volume.
 	VolumeTypeIO1 = "io1"
-
 	// VolumeTypeGP2 represents a general purpose SSD type of volume.
 	VolumeTypeGP2 = "gp2"
-
 	// VolumeTypeSC1 represents a cold HDD (sc1) type of volume.
 	VolumeTypeSC1 = "sc1"
-
 	// VolumeTypeST1 represents a throughput-optimized HDD type of volume.
 	VolumeTypeST1 = "st1"
+)
 
+// AWS provisioning limits.
+// Source: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSVolumeTypes.html
+const (
 	// MinTotalIOPS represents the minimum Input Output per second.
-	MinTotalIOPS int64 = 100
-
+	MinTotalIOPS = 100
 	// MaxTotalIOPS represents the maximum Input Output per second.
-	MaxTotalIOPS int64 = 20000
+	MaxTotalIOPS = 20000
+)
 
+// Defaults
+const (
+	// DefaultVolumeSize represents the default volume size.
+	DefaultVolumeSize int64 = 100 * 1024 * 1024 * 1024
 	// DefaultVolumeType specifies which storage to use for newly created Volumes.
 	DefaultVolumeType = VolumeTypeGP2
 )
 
+// Tags
+const (
+	// VolumeNameTagKey is the key value that refers to the volume's name.
+	VolumeNameTagKey = "com.amazon.aws.csi.volume"
+)
+
 var (
 	// ErrMultiDisks is an error that is returned when multiple
 	// disks are found with the same volume name.
@@ -95,7 +100,7 @@ type DiskOptions struct {
 	CapacityBytes    int64
 	Tags             map[string]string
 	VolumeType       string
-	IOPSPerGB        int64
+	IOPSPerGB        int
 	AvailabilityZone string
 }
 
@@ -177,7 +182,7 @@ func (c *cloud) CreateDisk(ctx context.Context, volumeName string, diskOptions *
 		createType = diskOptions.VolumeType
 	case VolumeTypeIO1:
 		createType = diskOptions.VolumeType
-		iops = capacityGiB * diskOptions.IOPSPerGB
+		iops = capacityGiB * int64(diskOptions.IOPSPerGB)
 		if iops < MinTotalIOPS {
 			iops = MinTotalIOPS
 		}

pkg/driver/controller.go

@@ -18,6 +18,7 @@ package driver
 
 import (
 	"context"
+	"strconv"
 
 	csi "github.com/container-storage-interface/spec/lib/go/csi/v0"
 	"github.com/golang/glog"
@@ -75,16 +76,28 @@ func (d *Driver) CreateVolume(ctx context.Context, req *csi.CreateVolumeRequest)
 
 	// create a new volume
 	zone := pickAvailabilityZone(req.GetAccessibilityRequirements())
+	volumeParams := req.GetParameters()
+	volumeType := volumeParams["type"]
+	iopsPerGB := 0
+	if volumeType == cloud.VolumeTypeIO1 {
+		iopsPerGB, err = strconv.Atoi(volumeParams["iopsPerGB"])
+		if err != nil {
+			return nil, status.Errorf(codes.InvalidArgument, "Could not parse invalid iopsPerGB: %v", err)
+		}
+	}
+
 	opts := &cloud.DiskOptions{
 		CapacityBytes:    volSizeBytes,
-		AvailabilityZone: zone,
 		Tags:             map[string]string{cloud.VolumeNameTagKey: volName},
+		VolumeType:       volumeType,
+		IOPSPerGB:        iopsPerGB,
+		AvailabilityZone: zone,
 	}
 	disk, err = d.cloud.CreateDisk(ctx, volName, opts)
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not create volume %q: %v", volName, err)
 	}
-	fsType := req.GetParameters()["fsType"]
+	fsType := volumeParams["fsType"]
 	disk.FsType = fsType
 	return newCreateVolumeResponse(disk), nil
 }

pkg/driver/controller_test.go

@@ -149,6 +149,39 @@ func TestCreateVolume(t *testing.T) {
 				Attributes:    map[string]string{"fsType": defaultFsType},
 			},
 		},
+		{
+			name: "success with volume type io1",
+			req: &csi.CreateVolumeRequest{
+				Name:               "vol-test",
+				CapacityRange:      stdCapRange,
+				VolumeCapabilities: stdVolCap,
+				Parameters: map[string]string{
+					"type":      cloud.VolumeTypeIO1,
+					"iopsPerGB": "5",
+				},
+			},
+			expVol: &csi.Volume{
+				CapacityBytes: stdVolSize,
+				Id:            "vol-test",
+				Attributes:    map[string]string{"fsType": ""},
+			},
+		},
+		{
+			name: "success with volume type sc1",
+			req: &csi.CreateVolumeRequest{
+				Name:               "vol-test",
+				CapacityRange:      stdCapRange,
+				VolumeCapabilities: stdVolCap,
+				Parameters: map[string]string{
+					"type": cloud.VolumeTypeSC1,
+				},
+			},
+			expVol: &csi.Volume{
+				CapacityBytes: stdVolSize,
+				Id:            "vol-test",
+				Attributes:    map[string]string{"fsType": ""},
+			},
+		},
 	}
 
 	for _, tc := range testCases {