refactor external snapshotter to use csi-lib-utils/rpc
This commit is contained in:
Andrew Kim
committed by
Andrew Sy Kim
Andrew Sy Kim
parent
c20ded872e
commit
06a4bf2a05
135
pkg/snapshotter/snapshotter.go
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135
pkg/snapshotter/snapshotter.go
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@@ -0,0 +1,135 @@
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/*
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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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"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/golang/protobuf/ptypes"
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"github.com/golang/protobuf/ptypes/timestamp"
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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 int64, 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, int64, 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, int64, 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 "", "", 0, 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 "", "", 0, 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 "", "", 0, 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 := timestampToUnixTime(rsp.Snapshot.CreationTime)
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if err != nil {
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return "", "", 0, 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, int64, 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, 0, 0, err
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}
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if rsp.Entries == nil || len(rsp.Entries) == 0 {
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return false, 0, 0, fmt.Errorf("can not find snapshot for snapshotID %s", snapshotID)
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}
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creationTime, err := timestampToUnixTime(rsp.Entries[0].Snapshot.CreationTime)
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if err != nil {
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return false, 0, 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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func timestampToUnixTime(t *timestamp.Timestamp) (int64, error) {
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time, err := ptypes.Timestamp(t)
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if err != nil {
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return -1, err
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}
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// TODO: clean this up, we probably don't need this translation layer
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// and can just use time.Time
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return time.UnixNano(), nil
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}
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504
pkg/snapshotter/snapshotter_test.go
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504
pkg/snapshotter/snapshotter_test.go
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@@ -0,0 +1,504 @@
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/*
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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 snapshotter
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import (
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"context"
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"fmt"
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"reflect"
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"testing"
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"github.com/container-storage-interface/spec/lib/go/csi"
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"github.com/golang/mock/gomock"
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"github.com/golang/protobuf/ptypes"
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"github.com/kubernetes-csi/csi-lib-utils/connection"
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"github.com/kubernetes-csi/csi-test/driver"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/types"
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)
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const (
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driverName = "foo/bar"
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)
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func createMockServer(t *testing.T) (*gomock.Controller, *driver.MockCSIDriver, *driver.MockIdentityServer, *driver.MockControllerServer, *grpc.ClientConn, error) {
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// Start the mock server
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mockController := gomock.NewController(t)
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identityServer := driver.NewMockIdentityServer(mockController)
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controllerServer := driver.NewMockControllerServer(mockController)
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drv := driver.NewMockCSIDriver(&driver.MockCSIDriverServers{
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Identity: identityServer,
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Controller: controllerServer,
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})
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drv.Start()
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// Create a client connection to it
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addr := drv.Address()
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csiConn, err := connection.Connect(addr)
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if err != nil {
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return nil, nil, nil, nil, nil, err
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}
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return mockController, drv, identityServer, controllerServer, csiConn, nil
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}
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func TestCreateSnapshot(t *testing.T) {
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defaultName := "snapshot-test"
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defaultID := "testid"
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createTimestamp := ptypes.TimestampNow()
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createTime, err := ptypes.Timestamp(createTimestamp)
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if err != nil {
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t.Fatalf("Failed to convert timestamp to time: %v", err)
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}
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createSecrets := map[string]string{"foo": "bar"}
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defaultParameter := map[string]string{
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"param1": "value1",
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"param2": "value2",
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}
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csiVolume := FakeCSIVolume()
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volumeWithoutCSI := FakeVolume()
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defaultRequest := &csi.CreateSnapshotRequest{
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Name: defaultName,
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SourceVolumeId: csiVolume.Spec.CSI.VolumeHandle,
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}
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attributesRequest := &csi.CreateSnapshotRequest{
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Name: defaultName,
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Parameters: defaultParameter,
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SourceVolumeId: csiVolume.Spec.CSI.VolumeHandle,
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}
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secretsRequest := &csi.CreateSnapshotRequest{
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Name: defaultName,
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SourceVolumeId: csiVolume.Spec.CSI.VolumeHandle,
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Secrets: createSecrets,
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}
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defaultResponse := &csi.CreateSnapshotResponse{
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Snapshot: &csi.Snapshot{
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SnapshotId: defaultID,
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SizeBytes: 1000,
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SourceVolumeId: csiVolume.Spec.CSI.VolumeHandle,
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CreationTime: createTimestamp,
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ReadyToUse: true,
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},
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}
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pluginInfoOutput := &csi.GetPluginInfoResponse{
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Name: driverName,
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VendorVersion: "0.3.0",
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Manifest: map[string]string{
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"hello": "world",
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},
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}
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type snapshotResult struct {
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driverName string
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snapshotId string
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timestamp int64
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size int64
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readyToUse bool
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}
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result := &snapshotResult{
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size: 1000,
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driverName: driverName,
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snapshotId: defaultID,
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timestamp: createTime.UnixNano(),
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readyToUse: true,
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}
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tests := []struct {
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name string
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snapshotName string
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volume *v1.PersistentVolume
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parameters map[string]string
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secrets map[string]string
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input *csi.CreateSnapshotRequest
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output *csi.CreateSnapshotResponse
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injectError codes.Code
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expectError bool
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expectResult *snapshotResult
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}{
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{
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name: "success",
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snapshotName: defaultName,
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volume: csiVolume,
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input: defaultRequest,
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output: defaultResponse,
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expectError: false,
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expectResult: result,
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},
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{
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name: "attributes",
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snapshotName: defaultName,
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volume: csiVolume,
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parameters: defaultParameter,
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input: attributesRequest,
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output: defaultResponse,
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expectError: false,
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expectResult: result,
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},
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{
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name: "secrets",
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snapshotName: defaultName,
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volume: csiVolume,
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secrets: createSecrets,
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input: secretsRequest,
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output: defaultResponse,
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expectError: false,
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expectResult: result,
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},
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{
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name: "fail for volume without csi source",
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snapshotName: defaultName,
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volume: volumeWithoutCSI,
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input: nil,
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output: nil,
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expectError: true,
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},
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{
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name: "gRPC transient error",
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snapshotName: defaultName,
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volume: csiVolume,
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input: defaultRequest,
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output: nil,
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injectError: codes.DeadlineExceeded,
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expectError: true,
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},
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{
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name: "gRPC final error",
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snapshotName: defaultName,
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volume: csiVolume,
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input: defaultRequest,
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output: nil,
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injectError: codes.NotFound,
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expectError: true,
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},
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}
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mockController, driver, identityServer, controllerServer, csiConn, err := createMockServer(t)
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if err != nil {
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t.Fatal(err)
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}
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defer mockController.Finish()
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defer driver.Stop()
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defer csiConn.Close()
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for _, test := range tests {
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in := test.input
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out := test.output
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var injectedErr error
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if test.injectError != codes.OK {
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injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
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}
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// Setup expectation
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if in != nil {
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identityServer.EXPECT().GetPluginInfo(gomock.Any(), gomock.Any()).Return(pluginInfoOutput, nil).Times(1)
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controllerServer.EXPECT().CreateSnapshot(gomock.Any(), in).Return(out, injectedErr).Times(1)
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}
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s := NewSnapshotter(csiConn)
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driverName, snapshotId, timestamp, size, readyToUse, err := s.CreateSnapshot(context.Background(), test.snapshotName, test.volume, test.parameters, test.secrets)
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if test.expectError && err == nil {
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t.Errorf("test %q: Expected error, got none", test.name)
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}
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if !test.expectError && err != nil {
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t.Errorf("test %q: got error: %v", test.name, err)
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}
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if test.expectResult != nil {
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if driverName != test.expectResult.driverName {
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t.Errorf("test %q: expected driverName: %q, got: %q", test.name, test.expectResult.driverName, driverName)
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}
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if snapshotId != test.expectResult.snapshotId {
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t.Errorf("test %q: expected snapshotId: %v, got: %v", test.name, test.expectResult.snapshotId, snapshotId)
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}
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if timestamp != test.expectResult.timestamp {
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t.Errorf("test %q: expected create time: %v, got: %v", test.name, test.expectResult.timestamp, timestamp)
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}
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if size != test.expectResult.size {
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t.Errorf("test %q: expected size: %v, got: %v", test.name, test.expectResult.size, size)
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}
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if !reflect.DeepEqual(readyToUse, test.expectResult.readyToUse) {
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t.Errorf("test %q: expected readyToUse: %v, got: %v", test.name, test.expectResult.readyToUse, readyToUse)
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}
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}
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}
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}
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func TestDeleteSnapshot(t *testing.T) {
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defaultID := "testid"
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secrets := map[string]string{"foo": "bar"}
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defaultRequest := &csi.DeleteSnapshotRequest{
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SnapshotId: defaultID,
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}
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secretsRequest := &csi.DeleteSnapshotRequest{
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SnapshotId: defaultID,
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Secrets: secrets,
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}
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tests := []struct {
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name string
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snapshotID string
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secrets map[string]string
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input *csi.DeleteSnapshotRequest
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output *csi.DeleteSnapshotResponse
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injectError codes.Code
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expectError bool
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}{
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{
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name: "success",
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snapshotID: defaultID,
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input: defaultRequest,
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output: &csi.DeleteSnapshotResponse{},
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expectError: false,
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},
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{
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name: "secrets",
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snapshotID: defaultID,
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secrets: secrets,
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input: secretsRequest,
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output: &csi.DeleteSnapshotResponse{},
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expectError: false,
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},
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{
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name: "gRPC transient error",
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snapshotID: defaultID,
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input: defaultRequest,
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output: nil,
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injectError: codes.DeadlineExceeded,
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expectError: true,
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},
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{
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name: "gRPC final error",
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snapshotID: defaultID,
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input: defaultRequest,
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output: nil,
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injectError: codes.NotFound,
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expectError: true,
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},
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}
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mockController, driver, _, controllerServer, csiConn, err := createMockServer(t)
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if err != nil {
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t.Fatal(err)
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}
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defer mockController.Finish()
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defer driver.Stop()
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defer csiConn.Close()
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for _, test := range tests {
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in := test.input
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out := test.output
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var injectedErr error
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if test.injectError != codes.OK {
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injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
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}
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// Setup expectation
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if in != nil {
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controllerServer.EXPECT().DeleteSnapshot(gomock.Any(), in).Return(out, injectedErr).Times(1)
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}
|
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s := NewSnapshotter(csiConn)
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err := s.DeleteSnapshot(context.Background(), test.snapshotID, test.secrets)
|
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if test.expectError && err == nil {
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t.Errorf("test %q: Expected error, got none", test.name)
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}
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if !test.expectError && err != nil {
|
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t.Errorf("test %q: got error: %v", test.name, err)
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}
|
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}
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}
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|
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func TestGetSnapshotStatus(t *testing.T) {
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defaultID := "testid"
|
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size := int64(1000)
|
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createTimestamp := ptypes.TimestampNow()
|
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createTime, err := ptypes.Timestamp(createTimestamp)
|
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if err != nil {
|
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t.Fatalf("Failed to convert timestamp to time: %v", err)
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}
|
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|
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defaultRequest := &csi.ListSnapshotsRequest{
|
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SnapshotId: defaultID,
|
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}
|
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|
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defaultResponse := &csi.ListSnapshotsResponse{
|
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Entries: []*csi.ListSnapshotsResponse_Entry{
|
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{
|
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Snapshot: &csi.Snapshot{
|
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SnapshotId: defaultID,
|
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SizeBytes: size,
|
||||
SourceVolumeId: "volumeid",
|
||||
CreationTime: createTimestamp,
|
||||
ReadyToUse: true,
|
||||
},
|
||||
},
|
||||
},
|
||||
}
|
||||
|
||||
tests := []struct {
|
||||
name string
|
||||
snapshotID string
|
||||
input *csi.ListSnapshotsRequest
|
||||
output *csi.ListSnapshotsResponse
|
||||
injectError codes.Code
|
||||
expectError bool
|
||||
expectReady bool
|
||||
expectCreateAt int64
|
||||
expectSize int64
|
||||
}{
|
||||
{
|
||||
name: "success",
|
||||
snapshotID: defaultID,
|
||||
input: defaultRequest,
|
||||
output: defaultResponse,
|
||||
expectError: false,
|
||||
expectReady: true,
|
||||
expectCreateAt: createTime.UnixNano(),
|
||||
expectSize: size,
|
||||
},
|
||||
{
|
||||
name: "gRPC transient error",
|
||||
snapshotID: defaultID,
|
||||
input: defaultRequest,
|
||||
output: nil,
|
||||
injectError: codes.DeadlineExceeded,
|
||||
expectError: true,
|
||||
},
|
||||
{
|
||||
name: "gRPC final error",
|
||||
snapshotID: defaultID,
|
||||
input: defaultRequest,
|
||||
output: nil,
|
||||
injectError: codes.NotFound,
|
||||
expectError: true,
|
||||
},
|
||||
}
|
||||
|
||||
mockController, driver, _, controllerServer, csiConn, err := createMockServer(t)
|
||||
if err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
defer mockController.Finish()
|
||||
defer driver.Stop()
|
||||
defer csiConn.Close()
|
||||
|
||||
for _, test := range tests {
|
||||
in := test.input
|
||||
out := test.output
|
||||
var injectedErr error
|
||||
if test.injectError != codes.OK {
|
||||
injectedErr = status.Error(test.injectError, fmt.Sprintf("Injecting error %d", test.injectError))
|
||||
}
|
||||
|
||||
// Setup expectation
|
||||
if in != nil {
|
||||
controllerServer.EXPECT().ListSnapshots(gomock.Any(), in).Return(out, injectedErr).Times(1)
|
||||
}
|
||||
|
||||
s := NewSnapshotter(csiConn)
|
||||
ready, createTime, size, err := s.GetSnapshotStatus(context.Background(), test.snapshotID)
|
||||
if test.expectError && err == nil {
|
||||
t.Errorf("test %q: Expected error, got none", test.name)
|
||||
}
|
||||
if !test.expectError && err != nil {
|
||||
t.Errorf("test %q: got error: %v", test.name, err)
|
||||
}
|
||||
if test.expectReady != ready {
|
||||
t.Errorf("test %q: expected status: %v, got: %v", test.name, test.expectReady, ready)
|
||||
}
|
||||
if test.expectCreateAt != createTime {
|
||||
t.Errorf("test %q: expected createTime: %v, got: %v", test.name, test.expectCreateAt, createTime)
|
||||
}
|
||||
if test.expectSize != size {
|
||||
t.Errorf("test %q: expected size: %v, got: %v", test.name, test.expectSize, size)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func FakeCSIVolume() *v1.PersistentVolume {
|
||||
volume := v1.PersistentVolume{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "fake-csi-volume",
|
||||
},
|
||||
Spec: v1.PersistentVolumeSpec{
|
||||
ClaimRef: &v1.ObjectReference{
|
||||
Kind: "PersistentVolumeClaim",
|
||||
APIVersion: "v1",
|
||||
UID: types.UID("uid123"),
|
||||
Namespace: "default",
|
||||
Name: "test-claim",
|
||||
},
|
||||
PersistentVolumeSource: v1.PersistentVolumeSource{
|
||||
CSI: &v1.CSIPersistentVolumeSource{
|
||||
Driver: driverName,
|
||||
VolumeHandle: "foo",
|
||||
},
|
||||
},
|
||||
StorageClassName: "default",
|
||||
},
|
||||
Status: v1.PersistentVolumeStatus{
|
||||
Phase: v1.VolumeBound,
|
||||
},
|
||||
}
|
||||
|
||||
return &volume
|
||||
}
|
||||
|
||||
func FakeVolume() *v1.PersistentVolume {
|
||||
volume := v1.PersistentVolume{
|
||||
ObjectMeta: metav1.ObjectMeta{
|
||||
Name: "fake-csi-volume",
|
||||
},
|
||||
Spec: v1.PersistentVolumeSpec{
|
||||
ClaimRef: &v1.ObjectReference{
|
||||
Kind: "PersistentVolumeClaim",
|
||||
APIVersion: "v1",
|
||||
UID: types.UID("uid123"),
|
||||
Namespace: "default",
|
||||
Name: "test-claim",
|
||||
},
|
||||
PersistentVolumeSource: v1.PersistentVolumeSource{
|
||||
GCEPersistentDisk: &v1.GCEPersistentDiskVolumeSource{},
|
||||
},
|
||||
StorageClassName: "default",
|
||||
},
|
||||
Status: v1.PersistentVolumeStatus{
|
||||
Phase: v1.VolumeBound,
|
||||
},
|
||||
}
|
||||
|
||||
return &volume
|
||||
}
|
||||
Reference in New Issue
Block a user