126 lines
4.1 KiB
Go
126 lines
4.1 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package snapshotter
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import (
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"context"
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"fmt"
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"time"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/golang/protobuf/ptypes"
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csirpc "github.com/kubernetes-csi/csi-lib-utils/rpc"
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"google.golang.org/grpc"
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"k8s.io/api/core/v1"
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"k8s.io/klog"
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)
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// Snapshotter implements CreateSnapshot/DeleteSnapshot operations against a remote CSI driver.
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type Snapshotter interface {
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// CreateSnapshot creates a snapshot for a volume
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CreateSnapshot(ctx context.Context, snapshotName string, volume *v1.PersistentVolume, parameters map[string]string, snapshotterCredentials map[string]string) (driverName string, snapshotId string, timestamp time.Time, size int64, readyToUse bool, err error)
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// DeleteSnapshot deletes a snapshot from a volume
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DeleteSnapshot(ctx context.Context, snapshotID string, snapshotterCredentials map[string]string) (err error)
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// GetSnapshotStatus returns if a snapshot is ready to use, creation time, and restore size.
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GetSnapshotStatus(ctx context.Context, snapshotID string) (bool, time.Time, int64, error)
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}
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type snapshot struct {
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conn *grpc.ClientConn
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}
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func NewSnapshotter(conn *grpc.ClientConn) Snapshotter {
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return &snapshot{
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conn: conn,
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}
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}
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func (s *snapshot) CreateSnapshot(ctx context.Context, snapshotName string, volume *v1.PersistentVolume, parameters map[string]string, snapshotterCredentials map[string]string) (string, string, time.Time, int64, bool, error) {
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klog.V(5).Infof("CSI CreateSnapshot: %s", snapshotName)
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if volume.Spec.CSI == nil {
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return "", "", time.Time{}, 0, false, fmt.Errorf("CSIPersistentVolumeSource not defined in spec")
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}
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client := csi.NewControllerClient(s.conn)
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driverName, err := csirpc.GetDriverName(ctx, s.conn)
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if err != nil {
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return "", "", time.Time{}, 0, false, err
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}
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req := csi.CreateSnapshotRequest{
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SourceVolumeId: volume.Spec.CSI.VolumeHandle,
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Name: snapshotName,
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Parameters: parameters,
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Secrets: snapshotterCredentials,
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}
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rsp, err := client.CreateSnapshot(ctx, &req)
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if err != nil {
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return "", "", time.Time{}, 0, false, err
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}
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klog.V(5).Infof("CSI CreateSnapshot: %s driver name [%s] snapshot ID [%s] time stamp [%d] size [%d] readyToUse [%v]", snapshotName, driverName, rsp.Snapshot.SnapshotId, rsp.Snapshot.CreationTime, rsp.Snapshot.SizeBytes, rsp.Snapshot.ReadyToUse)
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creationTime, err := ptypes.Timestamp(rsp.Snapshot.CreationTime)
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if err != nil {
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return "", "", time.Time{}, 0, false, err
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}
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return driverName, rsp.Snapshot.SnapshotId, creationTime, rsp.Snapshot.SizeBytes, rsp.Snapshot.ReadyToUse, nil
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}
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func (s *snapshot) DeleteSnapshot(ctx context.Context, snapshotID string, snapshotterCredentials map[string]string) (err error) {
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client := csi.NewControllerClient(s.conn)
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req := csi.DeleteSnapshotRequest{
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SnapshotId: snapshotID,
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Secrets: snapshotterCredentials,
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}
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if _, err := client.DeleteSnapshot(ctx, &req); err != nil {
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return err
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}
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return nil
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}
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func (s *snapshot) GetSnapshotStatus(ctx context.Context, snapshotID string) (bool, time.Time, int64, error) {
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client := csi.NewControllerClient(s.conn)
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req := csi.ListSnapshotsRequest{
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SnapshotId: snapshotID,
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}
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rsp, err := client.ListSnapshots(ctx, &req)
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if err != nil {
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return false, time.Time{}, 0, err
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}
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if rsp.Entries == nil || len(rsp.Entries) == 0 {
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return false, time.Time{}, 0, fmt.Errorf("can not find snapshot for snapshotID %s", snapshotID)
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}
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creationTime, err := ptypes.Timestamp(rsp.Entries[0].Snapshot.CreationTime)
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if err != nil {
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return false, time.Time{}, 0, err
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}
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return rsp.Entries[0].Snapshot.ReadyToUse, creationTime, rsp.Entries[0].Snapshot.SizeBytes, nil
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}
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