Added create group volume snapshot functionality

pkg/group_snapshotter/group_snapshotter.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2023 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 group_snapshotter
+
+import (
+	"context"
+	"github.com/container-storage-interface/spec/lib/go/csi"
+	"github.com/golang/protobuf/ptypes"
+	csirpc "github.com/kubernetes-csi/csi-lib-utils/rpc"
+	"google.golang.org/grpc"
+	klog "k8s.io/klog/v2"
+	"time"
+)
+
+// GroupSnapshotter implements CreateGroupSnapshot/DeleteGroupSnapshot operations against a remote CSI driver.
+type GroupSnapshotter interface {
+	// CreateGroupSnapshot creates a snapshot for a volume
+	CreateGroupSnapshot(ctx context.Context, groupSnapshotName string, volumeIDs []string, parameters map[string]string, snapshotterCredentials map[string]string) (driverName string, snapshotId string, snapshots []*csi.Snapshot, timestamp time.Time, readyToUse bool, err error)
+
+	// DeleteGroupSnapshot deletes a snapshot from a volume
+	DeleteGroupSnapshot(ctx context.Context, snapshotID string, snapshotterCredentials map[string]string) (err error)
+
+	// GetGroupSnapshotStatus returns if a snapshot is ready to use, creation time, and restore size.
+	GetGroupSnapshotStatus(ctx context.Context, snapshotID string, snapshotterListCredentials map[string]string) (bool, time.Time, error)
+}
+
+type groupSnapshot struct {
+	conn *grpc.ClientConn
+}
+
+func NewGroupSnapshotter(conn *grpc.ClientConn) GroupSnapshotter {
+	return &groupSnapshot{
+		conn: conn,
+	}
+}
+
+func (gs *groupSnapshot) CreateGroupSnapshot(ctx context.Context, groupSnapshotName string, volumeIDs []string, parameters map[string]string, snapshotterCredentials map[string]string) (string, string, []*csi.Snapshot, time.Time, bool, error) {
+	klog.V(5).Infof("CSI CreateSnapshot: %s", groupSnapshotName)
+	client := csi.NewGroupControllerClient(gs.conn)
+
+	driverName, err := csirpc.GetDriverName(ctx, gs.conn)
+	if err != nil {
+		return "", "", nil, time.Time{}, false, err
+	}
+
+	req := csi.CreateVolumeGroupSnapshotRequest{
+		Name:            groupSnapshotName,
+		SourceVolumeIds: volumeIDs,
+		Secrets:         snapshotterCredentials,
+		Parameters:      parameters,
+	}
+
+	rsp, err := client.CreateVolumeGroupSnapshot(ctx, &req)
+	if err != nil {
+		return "", "", nil, time.Time{}, false, err
+	}
+
+	klog.V(5).Infof("CSI CreateSnapshot: %s driver name [%s] snapshot ID [%s] time stamp [%v] snapshots [%v] readyToUse [%v]", groupSnapshotName, driverName, rsp.GroupSnapshot.GroupSnapshotId, rsp.GroupSnapshot.CreationTime, rsp.GroupSnapshot.Snapshots, rsp.GroupSnapshot.ReadyToUse)
+	creationTime, err := ptypes.Timestamp(rsp.GroupSnapshot.CreationTime)
+	if err != nil {
+		return "", "", nil, time.Time{}, false, err
+	}
+	return driverName, rsp.GroupSnapshot.GroupSnapshotId, rsp.GroupSnapshot.Snapshots, creationTime, rsp.GroupSnapshot.ReadyToUse, nil
+
+}
+
+func (gs *groupSnapshot) DeleteGroupSnapshot(ctx context.Context, snapshotID string, snapshotterCredentials map[string]string) error {
+	// TODO: Implement DeleteGroupSnapshot
+	return nil
+}
+
+func (gs *groupSnapshot) GetGroupSnapshotStatus(ctx context.Context, snapshotID string, snapshotterListCredentials map[string]string) (bool, time.Time, error) {
+	// TODO: Implement GetGroupSnapshotStatus
+	return true, time.Now(), nil
+}