0c1faac468
preserveUnknownField set to false, comments updates, adding pull request annotation more comment updates VolumeSnapshot comments rename to VolumeSnapshotClassName adding license
113 lines
4.2 KiB
Go
113 lines
4.2 KiB
Go
/*
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Copyright 2018 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 controller
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import (
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"context"
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"fmt"
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"strings"
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"time"
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crdv1 "github.com/kubernetes-csi/external-snapshotter/pkg/apis/volumesnapshot/v1beta1"
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"github.com/kubernetes-csi/external-snapshotter/pkg/snapshotter"
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v1 "k8s.io/api/core/v1"
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)
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// Handler is responsible for handling VolumeSnapshot events from informer.
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type Handler interface {
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CreateSnapshot(snapshot *crdv1.VolumeSnapshot, volume *v1.PersistentVolume, parameters map[string]string, snapshotterCredentials map[string]string) (string, string, time.Time, int64, bool, error)
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DeleteSnapshot(content *crdv1.VolumeSnapshotContent, snapshotterCredentials map[string]string) error
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GetSnapshotStatus(content *crdv1.VolumeSnapshotContent) (bool, time.Time, int64, error)
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}
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// csiHandler is a handler that calls CSI to create/delete volume snapshot.
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type csiHandler struct {
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snapshotter snapshotter.Snapshotter
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timeout time.Duration
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snapshotNamePrefix string
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snapshotNameUUIDLength int
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}
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// NewCSIHandler returns a handler which includes the csi connection and Snapshot name details
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func NewCSIHandler(
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snapshotter snapshotter.Snapshotter,
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timeout time.Duration,
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snapshotNamePrefix string,
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snapshotNameUUIDLength int,
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) Handler {
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return &csiHandler{
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snapshotter: snapshotter,
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timeout: timeout,
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snapshotNamePrefix: snapshotNamePrefix,
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snapshotNameUUIDLength: snapshotNameUUIDLength,
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}
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}
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func (handler *csiHandler) CreateSnapshot(snapshot *crdv1.VolumeSnapshot, volume *v1.PersistentVolume, parameters map[string]string, snapshotterCredentials map[string]string) (string, string, time.Time, int64, bool, error) {
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ctx, cancel := context.WithTimeout(context.Background(), handler.timeout)
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defer cancel()
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snapshotName, err := makeSnapshotName(handler.snapshotNamePrefix, string(snapshot.UID), handler.snapshotNameUUIDLength)
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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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newParameters, err := removePrefixedParameters(parameters)
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if err != nil {
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return "", "", time.Time{}, 0, false, fmt.Errorf("failed to remove CSI Parameters of prefixed keys: %v", err)
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}
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return handler.snapshotter.CreateSnapshot(ctx, snapshotName, volume, newParameters, snapshotterCredentials)
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}
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func (handler *csiHandler) DeleteSnapshot(content *crdv1.VolumeSnapshotContent, snapshotterCredentials map[string]string) error {
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ctx, cancel := context.WithTimeout(context.Background(), handler.timeout)
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defer cancel()
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err := handler.snapshotter.DeleteSnapshot(ctx, *content.Status.SnapshotHandle, snapshotterCredentials)
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if err != nil {
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return fmt.Errorf("failed to delete snapshot content %s: %q", content.Name, err)
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}
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return nil
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}
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func (handler *csiHandler) GetSnapshotStatus(content *crdv1.VolumeSnapshotContent) (bool, time.Time, int64, error) {
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ctx, cancel := context.WithTimeout(context.Background(), handler.timeout)
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defer cancel()
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csiSnapshotStatus, timestamp, size, err := handler.snapshotter.GetSnapshotStatus(ctx, *content.Status.SnapshotHandle)
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if err != nil {
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return false, time.Time{}, 0, fmt.Errorf("failed to list snapshot content %s: %q", content.Name, err)
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}
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return csiSnapshotStatus, timestamp, size, nil
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}
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func makeSnapshotName(prefix, snapshotUID string, snapshotNameUUIDLength int) (string, error) {
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// create persistent name based on a volumeNamePrefix and volumeNameUUIDLength
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// of PVC's UID
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if len(snapshotUID) == 0 {
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return "", fmt.Errorf("Corrupted snapshot object, it is missing UID")
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}
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if snapshotNameUUIDLength == -1 {
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// Default behavior is to not truncate or remove dashes
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return fmt.Sprintf("%s-%s", prefix, snapshotUID), nil
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}
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return fmt.Sprintf("%s-%s", prefix, strings.Replace(snapshotUID, "-", "", -1)[0:snapshotNameUUIDLength]), nil
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}
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