84 lines
3.1 KiB
Go
84 lines
3.1 KiB
Go
/*
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Copyright 2024 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 image
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import (
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/kubernetes/pkg/volume"
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)
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// imagePlugin is the image volume plugin which acts as a stub to provide the
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// functionality the volume manager expects. The real volume source
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// implementation is part of the kubelet code and gated by the Kubernetes
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// feature "ImageVolume"
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// See: https://kep.k8s.io/4639
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type imagePlugin struct {
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spec *volume.Spec
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volume.MetricsNil
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}
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var _ volume.VolumePlugin = &imagePlugin{}
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var _ volume.Mounter = &imagePlugin{}
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var _ volume.Unmounter = &imagePlugin{}
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var _ volume.Volume = &imagePlugin{}
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const pluginName = "kubernetes.io/image"
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func ProbeVolumePlugins() []volume.VolumePlugin {
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p := &imagePlugin{}
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return []volume.VolumePlugin{p}
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}
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func (o *imagePlugin) Init(volume.VolumeHost) error { return nil }
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func (o *imagePlugin) GetPluginName() string { return pluginName }
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func (o *imagePlugin) GetVolumeName(spec *volume.Spec) (string, error) { return o.spec.Name(), nil }
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func (o *imagePlugin) CanSupport(spec *volume.Spec) bool {
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return spec != nil && spec.Volume != nil && spec.Volume.Image != nil
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}
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func (o *imagePlugin) NewMounter(spec *volume.Spec, podRef *v1.Pod) (volume.Mounter, error) {
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return o, nil
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}
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func (o *imagePlugin) NewUnmounter(name string, podUID types.UID) (volume.Unmounter, error) {
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return o, nil
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}
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func (o *imagePlugin) ConstructVolumeSpec(volumeName, mountPath string) (volume.ReconstructedVolume, error) {
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return volume.ReconstructedVolume{Spec: o.spec}, nil
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}
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func (o *imagePlugin) GetAttributes() volume.Attributes {
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return volume.Attributes{
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ReadOnly: true,
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Managed: true,
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SELinuxRelabel: true,
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}
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}
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func (o *imagePlugin) GetPath() string { return "" }
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func (o *imagePlugin) RequiresFSResize() bool { return false }
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func (o *imagePlugin) RequiresRemount(spec *volume.Spec) bool { return false }
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func (o *imagePlugin) SetUp(mounterArgs volume.MounterArgs) error { return nil }
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func (o *imagePlugin) SetUpAt(dir string, mounterArgs volume.MounterArgs) error { return nil }
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func (o *imagePlugin) SupportsMountOption() bool { return false }
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func (o *imagePlugin) SupportsSELinuxContextMount(spec *volume.Spec) (bool, error) { return false, nil }
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func (o *imagePlugin) TearDown() error { return nil }
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func (o *imagePlugin) TearDownAt(string) error { return nil }
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