Merge pull request kubernetes#126777 from carlory/fix-image-plugin

Fix GetVolumeName for image volumeplugin

Author: k8s-ci-robot

pkg/volume/image/image.go

@@ -17,6 +17,8 @@ limitations under the License.
 package image
 
 import (
+	"fmt"
+
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/kubernetes/pkg/volume"
@@ -28,7 +30,6 @@ import (
 // feature "ImageVolume"
 // See: https://kep.k8s.io/4639
 type imagePlugin struct {
-	spec *volume.Spec
 	volume.MetricsNil
 }
 
@@ -44,9 +45,16 @@ func ProbeVolumePlugins() []volume.VolumePlugin {
 	return []volume.VolumePlugin{p}
 }
 
-func (o *imagePlugin) Init(volume.VolumeHost) error                    { return nil }
-func (o *imagePlugin) GetPluginName() string                           { return pluginName }
-func (o *imagePlugin) GetVolumeName(spec *volume.Spec) (string, error) { return o.spec.Name(), nil }
+func (o *imagePlugin) Init(volume.VolumeHost) error { return nil }
+func (o *imagePlugin) GetPluginName() string        { return pluginName }
+func (o *imagePlugin) GetVolumeName(spec *volume.Spec) (string, error) {
+	volumeSource := getVolumeSource(spec)
+	if volumeSource == nil {
+		return "", fmt.Errorf("the volumeSpec does not reference an Image volume type")
+	}
+
+	return volumeSource.Reference, nil
+}
 
 func (o *imagePlugin) CanSupport(spec *volume.Spec) bool {
 	return spec != nil && spec.Volume != nil && spec.Volume.Image != nil
@@ -61,7 +69,7 @@ func (o *imagePlugin) NewUnmounter(name string, podUID types.UID) (volume.Unmoun
 }
 
 func (o *imagePlugin) ConstructVolumeSpec(volumeName, mountPath string) (volume.ReconstructedVolume, error) {
-	return volume.ReconstructedVolume{Spec: o.spec}, nil
+	return volume.ReconstructedVolume{}, nil
 }
 
 func (o *imagePlugin) GetAttributes() volume.Attributes {
@@ -81,3 +89,10 @@ func (o *imagePlugin) SupportsMountOption() bool
 func (o *imagePlugin) SupportsSELinuxContextMount(spec *volume.Spec) (bool, error) { return false, nil }
 func (o *imagePlugin) TearDown() error                                             { return nil }
 func (o *imagePlugin) TearDownAt(string) error                                     { return nil }
+
+func getVolumeSource(spec *volume.Spec) *v1.ImageVolumeSource {
+	if spec == nil || spec.Volume == nil {
+		return nil
+	}
+	return spec.Volume.Image
+}

pkg/volume/image/image_test.go

@@ -0,0 +1,46 @@
+/*
+Copyright 2024 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 image
+
+import (
+	"testing"
+
+	v1 "k8s.io/api/core/v1"
+	"k8s.io/kubernetes/pkg/volume"
+)
+
+func TestCanSupport(t *testing.T) {
+	pluginMgr := volume.VolumePluginMgr{}
+	err := pluginMgr.InitPlugins(ProbeVolumePlugins(), nil /* prober */, nil /* host */)
+	if err != nil {
+		t.Fatalf("Failed to init plugins: %v", err)
+	}
+
+	plugin, err := pluginMgr.FindPluginByName(pluginName)
+	if err != nil {
+		t.Fatal("Can't find the plugin by name")
+	}
+	if plugin.GetPluginName() != pluginName {
+		t.Errorf("Wrong name: %s", plugin.GetPluginName())
+	}
+	if !plugin.CanSupport(&volume.Spec{Volume: &v1.Volume{VolumeSource: v1.VolumeSource{Image: &v1.ImageVolumeSource{Reference: ""}}}}) {
+		t.Errorf("Expected true")
+	}
+	if plugin.CanSupport(&volume.Spec{}) {
+		t.Errorf("Expected false")
+	}
+}