kubernetes volume_host 源码
kubernetes volume_host 代码
文件路径:/pkg/kubelet/volume_host.go
/*
Copyright 2016 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 kubelet
import (
"fmt"
"net"
"runtime"
"k8s.io/klog/v2"
"k8s.io/mount-utils"
utilexec "k8s.io/utils/exec"
authenticationv1 "k8s.io/api/authentication/v1"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
storagelisters "k8s.io/client-go/listers/storage/v1"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/tools/record"
cloudprovider "k8s.io/cloud-provider"
"k8s.io/kubernetes/pkg/kubelet/configmap"
"k8s.io/kubernetes/pkg/kubelet/secret"
"k8s.io/kubernetes/pkg/kubelet/token"
proxyutil "k8s.io/kubernetes/pkg/proxy/util"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/util"
"k8s.io/kubernetes/pkg/volume/util/hostutil"
"k8s.io/kubernetes/pkg/volume/util/subpath"
)
// NewInitializedVolumePluginMgr returns a new instance of
// volume.VolumePluginMgr initialized with kubelets implementation of the
// volume.VolumeHost interface.
//
// kubelet - used by VolumeHost methods to expose kubelet specific parameters
// plugins - used to initialize volumePluginMgr
func NewInitializedVolumePluginMgr(
kubelet *Kubelet,
secretManager secret.Manager,
configMapManager configmap.Manager,
tokenManager *token.Manager,
plugins []volume.VolumePlugin,
prober volume.DynamicPluginProber) (*volume.VolumePluginMgr, error) {
// Initialize csiDriverLister before calling InitPlugins
var informerFactory informers.SharedInformerFactory
var csiDriverLister storagelisters.CSIDriverLister
var csiDriversSynced cache.InformerSynced
const resyncPeriod = 0
// Don't initialize if kubeClient is nil
if kubelet.kubeClient != nil {
informerFactory = informers.NewSharedInformerFactory(kubelet.kubeClient, resyncPeriod)
csiDriverInformer := informerFactory.Storage().V1().CSIDrivers()
csiDriverLister = csiDriverInformer.Lister()
csiDriversSynced = csiDriverInformer.Informer().HasSynced
} else {
klog.InfoS("KubeClient is nil. Skip initialization of CSIDriverLister")
}
kvh := &kubeletVolumeHost{
kubelet: kubelet,
volumePluginMgr: volume.VolumePluginMgr{},
secretManager: secretManager,
configMapManager: configMapManager,
tokenManager: tokenManager,
informerFactory: informerFactory,
csiDriverLister: csiDriverLister,
csiDriversSynced: csiDriversSynced,
exec: utilexec.New(),
}
if err := kvh.volumePluginMgr.InitPlugins(plugins, prober, kvh); err != nil {
return nil, fmt.Errorf(
"could not initialize volume plugins for KubeletVolumePluginMgr: %v",
err)
}
return &kvh.volumePluginMgr, nil
}
// Compile-time check to ensure kubeletVolumeHost implements the VolumeHost interface
var _ volume.VolumeHost = &kubeletVolumeHost{}
var _ volume.KubeletVolumeHost = &kubeletVolumeHost{}
func (kvh *kubeletVolumeHost) GetPluginDir(pluginName string) string {
return kvh.kubelet.getPluginDir(pluginName)
}
type kubeletVolumeHost struct {
kubelet *Kubelet
volumePluginMgr volume.VolumePluginMgr
secretManager secret.Manager
tokenManager *token.Manager
configMapManager configmap.Manager
informerFactory informers.SharedInformerFactory
csiDriverLister storagelisters.CSIDriverLister
csiDriversSynced cache.InformerSynced
exec utilexec.Interface
}
func (kvh *kubeletVolumeHost) SetKubeletError(err error) {
kvh.kubelet.runtimeState.setStorageState(err)
}
func (kvh *kubeletVolumeHost) GetVolumeDevicePluginDir(pluginName string) string {
return kvh.kubelet.getVolumeDevicePluginDir(pluginName)
}
func (kvh *kubeletVolumeHost) GetPodsDir() string {
return kvh.kubelet.getPodsDir()
}
// GetHostIDsForPod if the pod uses user namespaces, takes the uid and gid
// inside the container and returns the host UID and GID those are mapped to on
// the host. If containerUID/containerGID is nil, then it returns the host
// UID/GID for ID 0 inside the container.
// If the pod is not using user namespaces, as there is no mapping needed, the
// same containerUID and containerGID params are returned.
func (kvh *kubeletVolumeHost) GetHostIDsForPod(pod *v1.Pod, containerUID, containerGID *int64) (hostUID, hostGID *int64, err error) {
return kvh.kubelet.getHostIDsForPod(pod, containerUID, containerGID)
}
func (kvh *kubeletVolumeHost) GetPodVolumeDir(podUID types.UID, pluginName string, volumeName string) string {
dir := kvh.kubelet.getPodVolumeDir(podUID, pluginName, volumeName)
if runtime.GOOS == "windows" {
dir = util.GetWindowsPath(dir)
}
return dir
}
func (kvh *kubeletVolumeHost) GetPodVolumeDeviceDir(podUID types.UID, pluginName string) string {
return kvh.kubelet.getPodVolumeDeviceDir(podUID, pluginName)
}
func (kvh *kubeletVolumeHost) GetPodPluginDir(podUID types.UID, pluginName string) string {
return kvh.kubelet.getPodPluginDir(podUID, pluginName)
}
func (kvh *kubeletVolumeHost) GetKubeClient() clientset.Interface {
return kvh.kubelet.kubeClient
}
func (kvh *kubeletVolumeHost) GetSubpather() subpath.Interface {
return kvh.kubelet.subpather
}
func (kvh *kubeletVolumeHost) GetFilteredDialOptions() *proxyutil.FilteredDialOptions {
// FilteredDial is not needed in the kubelet.
return nil
}
func (kvh *kubeletVolumeHost) GetHostUtil() hostutil.HostUtils {
return kvh.kubelet.hostutil
}
func (kvh *kubeletVolumeHost) GetInformerFactory() informers.SharedInformerFactory {
return kvh.informerFactory
}
func (kvh *kubeletVolumeHost) CSIDriverLister() storagelisters.CSIDriverLister {
return kvh.csiDriverLister
}
func (kvh *kubeletVolumeHost) CSIDriversSynced() cache.InformerSynced {
return kvh.csiDriversSynced
}
// WaitForCacheSync is a helper function that waits for cache sync for CSIDriverLister
func (kvh *kubeletVolumeHost) WaitForCacheSync() error {
if kvh.csiDriversSynced == nil {
klog.ErrorS(nil, "CsiDriversSynced not found on KubeletVolumeHost")
return fmt.Errorf("csiDriversSynced not found on KubeletVolumeHost")
}
synced := []cache.InformerSynced{kvh.csiDriversSynced}
if !cache.WaitForCacheSync(wait.NeverStop, synced...) {
klog.InfoS("Failed to wait for cache sync for CSIDriverLister")
return fmt.Errorf("failed to wait for cache sync for CSIDriverLister")
}
return nil
}
func (kvh *kubeletVolumeHost) NewWrapperMounter(
volName string,
spec volume.Spec,
pod *v1.Pod,
opts volume.VolumeOptions) (volume.Mounter, error) {
// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
wrapperVolumeName := "wrapped_" + volName
if spec.Volume != nil {
spec.Volume.Name = wrapperVolumeName
}
return kvh.kubelet.newVolumeMounterFromPlugins(&spec, pod, opts)
}
func (kvh *kubeletVolumeHost) NewWrapperUnmounter(volName string, spec volume.Spec, podUID types.UID) (volume.Unmounter, error) {
// The name of wrapper volume is set to "wrapped_{wrapped_volume_name}"
wrapperVolumeName := "wrapped_" + volName
if spec.Volume != nil {
spec.Volume.Name = wrapperVolumeName
}
plugin, err := kvh.kubelet.volumePluginMgr.FindPluginBySpec(&spec)
if err != nil {
return nil, err
}
return plugin.NewUnmounter(spec.Name(), podUID)
}
func (kvh *kubeletVolumeHost) GetCloudProvider() cloudprovider.Interface {
return kvh.kubelet.cloud
}
func (kvh *kubeletVolumeHost) GetMounter(pluginName string) mount.Interface {
return kvh.kubelet.mounter
}
func (kvh *kubeletVolumeHost) GetHostName() string {
return kvh.kubelet.hostname
}
func (kvh *kubeletVolumeHost) GetHostIP() (net.IP, error) {
hostIPs, err := kvh.kubelet.GetHostIPs()
if err != nil {
return nil, err
}
return hostIPs[0], err
}
func (kvh *kubeletVolumeHost) GetNodeAllocatable() (v1.ResourceList, error) {
node, err := kvh.kubelet.getNodeAnyWay()
if err != nil {
return nil, fmt.Errorf("error retrieving node: %v", err)
}
return node.Status.Allocatable, nil
}
func (kvh *kubeletVolumeHost) GetSecretFunc() func(namespace, name string) (*v1.Secret, error) {
return kvh.secretManager.GetSecret
}
func (kvh *kubeletVolumeHost) GetConfigMapFunc() func(namespace, name string) (*v1.ConfigMap, error) {
return kvh.configMapManager.GetConfigMap
}
func (kvh *kubeletVolumeHost) GetServiceAccountTokenFunc() func(namespace, name string, tr *authenticationv1.TokenRequest) (*authenticationv1.TokenRequest, error) {
return kvh.tokenManager.GetServiceAccountToken
}
func (kvh *kubeletVolumeHost) DeleteServiceAccountTokenFunc() func(podUID types.UID) {
return kvh.tokenManager.DeleteServiceAccountToken
}
func (kvh *kubeletVolumeHost) GetNodeLabels() (map[string]string, error) {
node, err := kvh.kubelet.GetNode()
if err != nil {
return nil, fmt.Errorf("error retrieving node: %v", err)
}
return node.Labels, nil
}
func (kvh *kubeletVolumeHost) GetAttachedVolumesFromNodeStatus() (map[v1.UniqueVolumeName]string, error) {
node, err := kvh.kubelet.GetNode()
if err != nil {
return nil, fmt.Errorf("error retrieving node: %v", err)
}
attachedVolumes := node.Status.VolumesAttached
result := map[v1.UniqueVolumeName]string{}
for i := range attachedVolumes {
attachedVolume := attachedVolumes[i]
result[attachedVolume.Name] = attachedVolume.DevicePath
}
return result, nil
}
func (kvh *kubeletVolumeHost) GetNodeName() types.NodeName {
return kvh.kubelet.nodeName
}
func (kvh *kubeletVolumeHost) GetEventRecorder() record.EventRecorder {
return kvh.kubelet.recorder
}
func (kvh *kubeletVolumeHost) GetExec(pluginName string) utilexec.Interface {
return kvh.exec
}
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