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rebase: update K8s packages to v0.32.1

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Update K8s packages in go.mod to v0.32.1

Signed-off-by: Praveen M <m.praveen@ibm.com>
This commit is contained in:
Praveen M
2025-01-16 09:41:46 +05:30
committed by mergify[bot]
parent 5aef21ea4e
commit 7eb99fc6c9
2442 changed files with 273386 additions and 47788 deletions
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68
vendor/k8s.io/kubernetes/pkg/kubelet/config/apiserver.go generated vendored Normal file
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/*
Copyright 2015 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 config
import (
"time"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/fields"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
)
// WaitForAPIServerSyncPeriod is the period between checks for the node list/watch initial sync
const WaitForAPIServerSyncPeriod = 1 * time.Second
// NewSourceApiserver creates a config source that watches and pulls from the apiserver.
func NewSourceApiserver(c clientset.Interface, nodeName types.NodeName, nodeHasSynced func() bool, updates chan<- interface{}) {
lw := cache.NewListWatchFromClient(c.CoreV1().RESTClient(), "pods", metav1.NamespaceAll, fields.OneTermEqualSelector("spec.nodeName", string(nodeName)))
// The Reflector responsible for watching pods at the apiserver should be run only after
// the node sync with the apiserver has completed.
klog.InfoS("Waiting for node sync before watching apiserver pods")
go func() {
for {
if nodeHasSynced() {
klog.V(4).InfoS("node sync completed")
break
}
time.Sleep(WaitForAPIServerSyncPeriod)
klog.V(4).InfoS("node sync has not completed yet")
}
klog.InfoS("Watching apiserver")
newSourceApiserverFromLW(lw, updates)
}()
}
// newSourceApiserverFromLW holds creates a config source that watches and pulls from the apiserver.
func newSourceApiserverFromLW(lw cache.ListerWatcher, updates chan<- interface{}) {
send := func(objs []interface{}) {
var pods []*v1.Pod
for _, o := range objs {
pods = append(pods, o.(*v1.Pod))
}
updates <- kubetypes.PodUpdate{Pods: pods, Op: kubetypes.SET, Source: kubetypes.ApiserverSource}
}
r := cache.NewReflector(lw, &v1.Pod{}, cache.NewUndeltaStore(send, cache.MetaNamespaceKeyFunc), 0)
go r.Run(wait.NeverStop)
}

191
vendor/k8s.io/kubernetes/pkg/kubelet/config/common.go generated vendored Normal file
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/*
Copyright 2014 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 config
import (
"crypto/md5"
"encoding/hex"
"errors"
"fmt"
"strings"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
utilyaml "k8s.io/apimachinery/pkg/util/yaml"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/apis/core/helper"
// TODO: remove this import if
// api.Registry.GroupOrDie(v1.GroupName).GroupVersion.String() is changed
// to "v1"?
"k8s.io/kubernetes/pkg/api/legacyscheme"
// Ensure that core apis are installed
_ "k8s.io/kubernetes/pkg/apis/core/install"
k8s_api_v1 "k8s.io/kubernetes/pkg/apis/core/v1"
"k8s.io/kubernetes/pkg/apis/core/validation"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/util/hash"
"k8s.io/klog/v2"
)
const (
maxConfigLength = 10 * 1 << 20 // 10MB
)
// Generate a pod name that is unique among nodes by appending the nodeName.
func generatePodName(name string, nodeName types.NodeName) string {
return fmt.Sprintf("%s-%s", name, strings.ToLower(string(nodeName)))
}
func applyDefaults(pod *api.Pod, source string, isFile bool, nodeName types.NodeName) error {
if len(pod.UID) == 0 {
hasher := md5.New()
hash.DeepHashObject(hasher, pod)
// DeepHashObject resets the hash, so we should write the pod source
// information AFTER it.
if isFile {
fmt.Fprintf(hasher, "host:%s", nodeName)
fmt.Fprintf(hasher, "file:%s", source)
} else {
fmt.Fprintf(hasher, "url:%s", source)
}
pod.UID = types.UID(hex.EncodeToString(hasher.Sum(nil)[0:]))
klog.V(5).InfoS("Generated UID", "pod", klog.KObj(pod), "podUID", pod.UID, "source", source)
}
pod.Name = generatePodName(pod.Name, nodeName)
klog.V(5).InfoS("Generated pod name", "pod", klog.KObj(pod), "podUID", pod.UID, "source", source)
if pod.Namespace == "" {
pod.Namespace = metav1.NamespaceDefault
}
klog.V(5).InfoS("Set namespace for pod", "pod", klog.KObj(pod), "source", source)
// Set the Host field to indicate this pod is scheduled on the current node.
pod.Spec.NodeName = string(nodeName)
if pod.Annotations == nil {
pod.Annotations = make(map[string]string)
}
// The generated UID is the hash of the file.
pod.Annotations[kubetypes.ConfigHashAnnotationKey] = string(pod.UID)
if isFile {
// Applying the default Taint tolerations to static pods,
// so they are not evicted when there are node problems.
helper.AddOrUpdateTolerationInPod(pod, &api.Toleration{
Operator: "Exists",
Effect: api.TaintEffectNoExecute,
})
}
// Set the default status to pending.
pod.Status.Phase = api.PodPending
return nil
}
type defaultFunc func(pod *api.Pod) error
// A static pod tried to use a ClusterTrustBundle projected volume source.
var ErrStaticPodTriedToUseClusterTrustBundle = errors.New("static pods may not use ClusterTrustBundle projected volume sources")
// tryDecodeSinglePod takes data and tries to extract valid Pod config information from it.
func tryDecodeSinglePod(data []byte, defaultFn defaultFunc) (parsed bool, pod *v1.Pod, err error) {
// JSON is valid YAML, so this should work for everything.
json, err := utilyaml.ToJSON(data)
if err != nil {
return false, nil, err
}
obj, err := runtime.Decode(legacyscheme.Codecs.UniversalDecoder(), json)
if err != nil {
return false, pod, err
}
newPod, ok := obj.(*api.Pod)
// Check whether the object could be converted to single pod.
if !ok {
return false, pod, fmt.Errorf("invalid pod: %#v", obj)
}
if newPod.Name == "" {
return true, pod, fmt.Errorf("invalid pod: name is needed for the pod")
}
// Apply default values and validate the pod.
if err = defaultFn(newPod); err != nil {
return true, pod, err
}
if errs := validation.ValidatePodCreate(newPod, validation.PodValidationOptions{}); len(errs) > 0 {
return true, pod, fmt.Errorf("invalid pod: %v", errs)
}
v1Pod := &v1.Pod{}
if err := k8s_api_v1.Convert_core_Pod_To_v1_Pod(newPod, v1Pod, nil); err != nil {
klog.ErrorS(err, "Pod failed to convert to v1", "pod", klog.KObj(newPod))
return true, nil, err
}
for _, v := range v1Pod.Spec.Volumes {
if v.Projected == nil {
continue
}
for _, s := range v.Projected.Sources {
if s.ClusterTrustBundle != nil {
return true, nil, ErrStaticPodTriedToUseClusterTrustBundle
}
}
}
return true, v1Pod, nil
}
func tryDecodePodList(data []byte, defaultFn defaultFunc) (parsed bool, pods v1.PodList, err error) {
obj, err := runtime.Decode(legacyscheme.Codecs.UniversalDecoder(), data)
if err != nil {
return false, pods, err
}
newPods, ok := obj.(*api.PodList)
// Check whether the object could be converted to list of pods.
if !ok {
err = fmt.Errorf("invalid pods list: %#v", obj)
return false, pods, err
}
// Apply default values and validate pods.
for i := range newPods.Items {
newPod := &newPods.Items[i]
if newPod.Name == "" {
return true, pods, fmt.Errorf("invalid pod: name is needed for the pod")
}
if err = defaultFn(newPod); err != nil {
return true, pods, err
}
if errs := validation.ValidatePodCreate(newPod, validation.PodValidationOptions{}); len(errs) > 0 {
err = fmt.Errorf("invalid pod: %v", errs)
return true, pods, err
}
}
v1Pods := &v1.PodList{}
if err := k8s_api_v1.Convert_core_PodList_To_v1_PodList(newPods, v1Pods, nil); err != nil {
return true, pods, err
}
return true, *v1Pods, err
}

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vendor/k8s.io/kubernetes/pkg/kubelet/config/config.go generated vendored Normal file
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/*
Copyright 2014 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 config
import (
"context"
"fmt"
"reflect"
"sync"
"time"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/client-go/tools/record"
"k8s.io/klog/v2"
kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
"k8s.io/kubernetes/pkg/kubelet/events"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/kubernetes/pkg/kubelet/util/format"
)
// PodConfigNotificationMode describes how changes are sent to the update channel.
type PodConfigNotificationMode int
const (
// PodConfigNotificationUnknown is the default value for
// PodConfigNotificationMode when uninitialized.
PodConfigNotificationUnknown PodConfigNotificationMode = iota
// PodConfigNotificationSnapshot delivers the full configuration as a SET whenever
// any change occurs.
PodConfigNotificationSnapshot
// PodConfigNotificationSnapshotAndUpdates delivers an UPDATE and DELETE message whenever pods are
// changed, and a SET message if there are any additions or removals.
PodConfigNotificationSnapshotAndUpdates
// PodConfigNotificationIncremental delivers ADD, UPDATE, DELETE, REMOVE, RECONCILE to the update channel.
PodConfigNotificationIncremental
)
type podStartupSLIObserver interface {
ObservedPodOnWatch(pod *v1.Pod, when time.Time)
}
// PodConfig is a configuration mux that merges many sources of pod configuration into a single
// consistent structure, and then delivers incremental change notifications to listeners
// in order.
type PodConfig struct {
pods *podStorage
mux *mux
// the channel of denormalized changes passed to listeners
updates chan kubetypes.PodUpdate
// contains the list of all configured sources
sourcesLock sync.Mutex
sources sets.Set[string]
}
// NewPodConfig creates an object that can merge many configuration sources into a stream
// of normalized updates to a pod configuration.
func NewPodConfig(mode PodConfigNotificationMode, recorder record.EventRecorder, startupSLIObserver podStartupSLIObserver) *PodConfig {
updates := make(chan kubetypes.PodUpdate, 50)
storage := newPodStorage(updates, mode, recorder, startupSLIObserver)
podConfig := &PodConfig{
pods: storage,
mux: newMux(storage),
updates: updates,
sources: sets.Set[string]{},
}
return podConfig
}
// Channel creates or returns a config source channel. The channel
// only accepts PodUpdates
func (c *PodConfig) Channel(ctx context.Context, source string) chan<- interface{} {
c.sourcesLock.Lock()
defer c.sourcesLock.Unlock()
c.sources.Insert(source)
return c.mux.ChannelWithContext(ctx, source)
}
// SeenAllSources returns true if seenSources contains all sources in the
// config, and also this config has received a SET message from each source.
func (c *PodConfig) SeenAllSources(seenSources sets.Set[string]) bool {
if c.pods == nil {
return false
}
c.sourcesLock.Lock()
defer c.sourcesLock.Unlock()
klog.V(5).InfoS("Looking for sources, have seen", "sources", sets.List(c.sources), "seenSources", seenSources)
return seenSources.HasAll(sets.List(c.sources)...) && c.pods.seenSources(sets.List(c.sources)...)
}
// Updates returns a channel of updates to the configuration, properly denormalized.
func (c *PodConfig) Updates() <-chan kubetypes.PodUpdate {
return c.updates
}
// Sync requests the full configuration be delivered to the update channel.
func (c *PodConfig) Sync() {
c.pods.sync()
}
// podStorage manages the current pod state at any point in time and ensures updates
// to the channel are delivered in order. Note that this object is an in-memory source of
// "truth" and on creation contains zero entries. Once all previously read sources are
// available, then this object should be considered authoritative.
type podStorage struct {
podLock sync.RWMutex
// map of source name to pod uid to pod reference
pods map[string]map[types.UID]*v1.Pod
mode PodConfigNotificationMode
// ensures that updates are delivered in strict order
// on the updates channel
updateLock sync.Mutex
updates chan<- kubetypes.PodUpdate
// contains the set of all sources that have sent at least one SET
sourcesSeenLock sync.RWMutex
sourcesSeen sets.Set[string]
// the EventRecorder to use
recorder record.EventRecorder
startupSLIObserver podStartupSLIObserver
}
// TODO: PodConfigNotificationMode could be handled by a listener to the updates channel
// in the future, especially with multiple listeners.
// TODO: allow initialization of the current state of the store with snapshotted version.
func newPodStorage(updates chan<- kubetypes.PodUpdate, mode PodConfigNotificationMode, recorder record.EventRecorder, startupSLIObserver podStartupSLIObserver) *podStorage {
return &podStorage{
pods: make(map[string]map[types.UID]*v1.Pod),
mode: mode,
updates: updates,
sourcesSeen: sets.Set[string]{},
recorder: recorder,
startupSLIObserver: startupSLIObserver,
}
}
// Merge normalizes a set of incoming changes from different sources into a map of all Pods
// and ensures that redundant changes are filtered out, and then pushes zero or more minimal
// updates onto the update channel. Ensures that updates are delivered in order.
func (s *podStorage) Merge(source string, change interface{}) error {
s.updateLock.Lock()
defer s.updateLock.Unlock()
seenBefore := s.sourcesSeen.Has(source)
adds, updates, deletes, removes, reconciles := s.merge(source, change)
firstSet := !seenBefore && s.sourcesSeen.Has(source)
// deliver update notifications
switch s.mode {
case PodConfigNotificationIncremental:
if len(removes.Pods) > 0 {
s.updates <- *removes
}
if len(adds.Pods) > 0 {
s.updates <- *adds
}
if len(updates.Pods) > 0 {
s.updates <- *updates
}
if len(deletes.Pods) > 0 {
s.updates <- *deletes
}
if firstSet && len(adds.Pods) == 0 && len(updates.Pods) == 0 && len(deletes.Pods) == 0 {
// Send an empty update when first seeing the source and there are
// no ADD or UPDATE or DELETE pods from the source. This signals kubelet that
// the source is ready.
s.updates <- *adds
}
// Only add reconcile support here, because kubelet doesn't support Snapshot update now.
if len(reconciles.Pods) > 0 {
s.updates <- *reconciles
}
case PodConfigNotificationSnapshotAndUpdates:
if len(removes.Pods) > 0 || len(adds.Pods) > 0 || firstSet {
s.updates <- kubetypes.PodUpdate{Pods: s.mergedState().([]*v1.Pod), Op: kubetypes.SET, Source: source}
}
if len(updates.Pods) > 0 {
s.updates <- *updates
}
if len(deletes.Pods) > 0 {
s.updates <- *deletes
}
case PodConfigNotificationSnapshot:
if len(updates.Pods) > 0 || len(deletes.Pods) > 0 || len(adds.Pods) > 0 || len(removes.Pods) > 0 || firstSet {
s.updates <- kubetypes.PodUpdate{Pods: s.mergedState().([]*v1.Pod), Op: kubetypes.SET, Source: source}
}
case PodConfigNotificationUnknown:
fallthrough
default:
panic(fmt.Sprintf("unsupported PodConfigNotificationMode: %#v", s.mode))
}
return nil
}
func (s *podStorage) merge(source string, change interface{}) (adds, updates, deletes, removes, reconciles *kubetypes.PodUpdate) {
s.podLock.Lock()
defer s.podLock.Unlock()
addPods := []*v1.Pod{}
updatePods := []*v1.Pod{}
deletePods := []*v1.Pod{}
removePods := []*v1.Pod{}
reconcilePods := []*v1.Pod{}
pods := s.pods[source]
if pods == nil {
pods = make(map[types.UID]*v1.Pod)
}
// updatePodFunc is the local function which updates the pod cache *oldPods* with new pods *newPods*.
// After updated, new pod will be stored in the pod cache *pods*.
// Notice that *pods* and *oldPods* could be the same cache.
updatePodsFunc := func(newPods []*v1.Pod, oldPods, pods map[types.UID]*v1.Pod) {
filtered := filterInvalidPods(newPods, source, s.recorder)
for _, ref := range filtered {
// Annotate the pod with the source before any comparison.
if ref.Annotations == nil {
ref.Annotations = make(map[string]string)
}
ref.Annotations[kubetypes.ConfigSourceAnnotationKey] = source
// ignore static pods
if !kubetypes.IsStaticPod(ref) {
s.startupSLIObserver.ObservedPodOnWatch(ref, time.Now())
}
if existing, found := oldPods[ref.UID]; found {
pods[ref.UID] = existing
needUpdate, needReconcile, needGracefulDelete := checkAndUpdatePod(existing, ref)
if needUpdate {
updatePods = append(updatePods, existing)
} else if needReconcile {
reconcilePods = append(reconcilePods, existing)
} else if needGracefulDelete {
deletePods = append(deletePods, existing)
}
continue
}
recordFirstSeenTime(ref)
pods[ref.UID] = ref
addPods = append(addPods, ref)
}
}
update := change.(kubetypes.PodUpdate)
switch update.Op {
case kubetypes.ADD, kubetypes.UPDATE, kubetypes.DELETE:
if update.Op == kubetypes.ADD {
klog.V(4).InfoS("Adding new pods from source", "source", source, "pods", klog.KObjSlice(update.Pods))
} else if update.Op == kubetypes.DELETE {
klog.V(4).InfoS("Gracefully deleting pods from source", "source", source, "pods", klog.KObjSlice(update.Pods))
} else {
klog.V(4).InfoS("Updating pods from source", "source", source, "pods", klog.KObjSlice(update.Pods))
}
updatePodsFunc(update.Pods, pods, pods)
case kubetypes.REMOVE:
klog.V(4).InfoS("Removing pods from source", "source", source, "pods", klog.KObjSlice(update.Pods))
for _, value := range update.Pods {
if existing, found := pods[value.UID]; found {
// this is a delete
delete(pods, value.UID)
removePods = append(removePods, existing)
continue
}
// this is a no-op
}
case kubetypes.SET:
klog.V(4).InfoS("Setting pods for source", "source", source)
s.markSourceSet(source)
// Clear the old map entries by just creating a new map
oldPods := pods
pods = make(map[types.UID]*v1.Pod)
updatePodsFunc(update.Pods, oldPods, pods)
for uid, existing := range oldPods {
if _, found := pods[uid]; !found {
// this is a delete
removePods = append(removePods, existing)
}
}
default:
klog.InfoS("Received invalid update type", "type", update)
}
s.pods[source] = pods
adds = &kubetypes.PodUpdate{Op: kubetypes.ADD, Pods: copyPods(addPods), Source: source}
updates = &kubetypes.PodUpdate{Op: kubetypes.UPDATE, Pods: copyPods(updatePods), Source: source}
deletes = &kubetypes.PodUpdate{Op: kubetypes.DELETE, Pods: copyPods(deletePods), Source: source}
removes = &kubetypes.PodUpdate{Op: kubetypes.REMOVE, Pods: copyPods(removePods), Source: source}
reconciles = &kubetypes.PodUpdate{Op: kubetypes.RECONCILE, Pods: copyPods(reconcilePods), Source: source}
return adds, updates, deletes, removes, reconciles
}
func (s *podStorage) markSourceSet(source string) {
s.sourcesSeenLock.Lock()
defer s.sourcesSeenLock.Unlock()
s.sourcesSeen.Insert(source)
}
func (s *podStorage) seenSources(sources ...string) bool {
s.sourcesSeenLock.RLock()
defer s.sourcesSeenLock.RUnlock()
return s.sourcesSeen.HasAll(sources...)
}
func filterInvalidPods(pods []*v1.Pod, source string, recorder record.EventRecorder) (filtered []*v1.Pod) {
names := sets.Set[string]{}
for i, pod := range pods {
// Pods from each source are assumed to have passed validation individually.
// This function only checks if there is any naming conflict.
name := kubecontainer.GetPodFullName(pod)
if names.Has(name) {
klog.InfoS("Pod failed validation due to duplicate pod name, ignoring", "index", i, "pod", klog.KObj(pod), "source", source)
recorder.Eventf(pod, v1.EventTypeWarning, events.FailedValidation, "Error validating pod %s from %s due to duplicate pod name %q, ignoring", format.Pod(pod), source, pod.Name)
continue
} else {
names.Insert(name)
}
filtered = append(filtered, pod)
}
return
}
// Annotations that the kubelet adds to the pod.
var localAnnotations = []string{
kubetypes.ConfigSourceAnnotationKey,
kubetypes.ConfigMirrorAnnotationKey,
kubetypes.ConfigFirstSeenAnnotationKey,
}
func isLocalAnnotationKey(key string) bool {
for _, localKey := range localAnnotations {
if key == localKey {
return true
}
}
return false
}
// isAnnotationMapEqual returns true if the existing annotation Map is equal to candidate except
// for local annotations.
func isAnnotationMapEqual(existingMap, candidateMap map[string]string) bool {
if candidateMap == nil {
candidateMap = make(map[string]string)
}
for k, v := range candidateMap {
if isLocalAnnotationKey(k) {
continue
}
if existingValue, ok := existingMap[k]; ok && existingValue == v {
continue
}
return false
}
for k := range existingMap {
if isLocalAnnotationKey(k) {
continue
}
// stale entry in existing map.
if _, exists := candidateMap[k]; !exists {
return false
}
}
return true
}
// recordFirstSeenTime records the first seen time of this pod.
func recordFirstSeenTime(pod *v1.Pod) {
klog.V(4).InfoS("Receiving a new pod", "pod", klog.KObj(pod))
pod.Annotations[kubetypes.ConfigFirstSeenAnnotationKey] = kubetypes.NewTimestamp().GetString()
}
// updateAnnotations returns an Annotation map containing the api annotation map plus
// locally managed annotations
func updateAnnotations(existing, ref *v1.Pod) {
annotations := make(map[string]string, len(ref.Annotations)+len(localAnnotations))
for k, v := range ref.Annotations {
annotations[k] = v
}
for _, k := range localAnnotations {
if v, ok := existing.Annotations[k]; ok {
annotations[k] = v
}
}
existing.Annotations = annotations
}
func podsDifferSemantically(existing, ref *v1.Pod) bool {
if reflect.DeepEqual(existing.Spec, ref.Spec) &&
reflect.DeepEqual(existing.Labels, ref.Labels) &&
reflect.DeepEqual(existing.DeletionTimestamp, ref.DeletionTimestamp) &&
reflect.DeepEqual(existing.DeletionGracePeriodSeconds, ref.DeletionGracePeriodSeconds) &&
isAnnotationMapEqual(existing.Annotations, ref.Annotations) {
return false
}
return true
}
// checkAndUpdatePod updates existing, and:
// - if ref makes a meaningful change, returns needUpdate=true
// - if ref makes a meaningful change, and this change is graceful deletion, returns needGracefulDelete=true
// - if ref makes no meaningful change, but changes the pod status, returns needReconcile=true
// - else return all false
// Now, needUpdate, needGracefulDelete and needReconcile should never be both true
func checkAndUpdatePod(existing, ref *v1.Pod) (needUpdate, needReconcile, needGracefulDelete bool) {
// 1. this is a reconcile
// TODO: it would be better to update the whole object and only preserve certain things
// like the source annotation or the UID (to ensure safety)
if !podsDifferSemantically(existing, ref) {
// this is not an update
// Only check reconcile when it is not an update, because if the pod is going to
// be updated, an extra reconcile is unnecessary
if !reflect.DeepEqual(existing.Status, ref.Status) {
// Pod with changed pod status needs reconcile, because kubelet should
// be the source of truth of pod status.
existing.Status = ref.Status
needReconcile = true
}
return
}
// Overwrite the first-seen time with the existing one. This is our own
// internal annotation, there is no need to update.
ref.Annotations[kubetypes.ConfigFirstSeenAnnotationKey] = existing.Annotations[kubetypes.ConfigFirstSeenAnnotationKey]
existing.Spec = ref.Spec
existing.Labels = ref.Labels
existing.DeletionTimestamp = ref.DeletionTimestamp
existing.DeletionGracePeriodSeconds = ref.DeletionGracePeriodSeconds
existing.Status = ref.Status
updateAnnotations(existing, ref)
// 2. this is an graceful delete
if ref.DeletionTimestamp != nil {
needGracefulDelete = true
} else {
// 3. this is an update
needUpdate = true
}
return
}
// sync sends a copy of the current state through the update channel.
func (s *podStorage) sync() {
s.updateLock.Lock()
defer s.updateLock.Unlock()
s.updates <- kubetypes.PodUpdate{Pods: s.mergedState().([]*v1.Pod), Op: kubetypes.SET, Source: kubetypes.AllSource}
}
func (s *podStorage) mergedState() interface{} {
s.podLock.RLock()
defer s.podLock.RUnlock()
pods := make([]*v1.Pod, 0)
for _, sourcePods := range s.pods {
for _, podRef := range sourcePods {
pods = append(pods, podRef.DeepCopy())
}
}
return pods
}
func copyPods(sourcePods []*v1.Pod) []*v1.Pod {
pods := []*v1.Pod{}
for _, source := range sourcePods {
// Use a deep copy here just in case
pods = append(pods, source.DeepCopy())
}
return pods
}

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/*
Copyright 2017 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 config
// Defines sane defaults for the kubelet config.
const (
DefaultKubeletPodsDirName = "pods"
DefaultKubeletVolumesDirName = "volumes"
DefaultKubeletVolumeSubpathsDirName = "volume-subpaths"
DefaultKubeletVolumeDevicesDirName = "volumeDevices"
DefaultKubeletPluginsDirName = "plugins"
DefaultKubeletPluginsRegistrationDirName = "plugins_registry"
DefaultKubeletContainersDirName = "containers"
DefaultKubeletPluginContainersDirName = "plugin-containers"
DefaultKubeletPodResourcesDirName = "pod-resources"
KubeletPluginsDirSELinuxLabel = "system_u:object_r:container_file_t:s0"
KubeletContainersSharedSELinuxLabel = "system_u:object_r:container_file_t:s0"
DefaultKubeletCheckpointsDirName = "checkpoints"
)

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vendor/k8s.io/kubernetes/pkg/kubelet/config/doc.go generated vendored Normal file
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/*
Copyright 2014 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 config implements the pod configuration readers.
package config // import "k8s.io/kubernetes/pkg/kubelet/config"

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/*
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 config
import (
"fmt"
"os"
"path/filepath"
"sort"
"strings"
"time"
"k8s.io/klog/v2"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/cache"
api "k8s.io/kubernetes/pkg/apis/core"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
utilio "k8s.io/utils/io"
)
type podEventType int
const (
podAdd podEventType = iota
podModify
podDelete
eventBufferLen = 10
)
type watchEvent struct {
fileName string
eventType podEventType
}
type sourceFile struct {
path string
nodeName types.NodeName
period time.Duration
store cache.Store
fileKeyMapping map[string]string
updates chan<- interface{}
watchEvents chan *watchEvent
}
// NewSourceFile watches a config file for changes.
func NewSourceFile(path string, nodeName types.NodeName, period time.Duration, updates chan<- interface{}) {
// "github.com/sigma/go-inotify" requires a path without trailing "/"
path = strings.TrimRight(path, string(os.PathSeparator))
config := newSourceFile(path, nodeName, period, updates)
klog.V(1).InfoS("Watching path", "path", path)
config.run()
}
func newSourceFile(path string, nodeName types.NodeName, period time.Duration, updates chan<- interface{}) *sourceFile {
send := func(objs []interface{}) {
var pods []*v1.Pod
for _, o := range objs {
pods = append(pods, o.(*v1.Pod))
}
updates <- kubetypes.PodUpdate{Pods: pods, Op: kubetypes.SET, Source: kubetypes.FileSource}
}
store := cache.NewUndeltaStore(send, cache.MetaNamespaceKeyFunc)
return &sourceFile{
path: path,
nodeName: nodeName,
period: period,
store: store,
fileKeyMapping: map[string]string{},
updates: updates,
watchEvents: make(chan *watchEvent, eventBufferLen),
}
}
func (s *sourceFile) run() {
listTicker := time.NewTicker(s.period)
go func() {
// Read path immediately to speed up startup.
if err := s.listConfig(); err != nil {
klog.ErrorS(err, "Unable to read config path", "path", s.path)
}
for {
select {
case <-listTicker.C:
if err := s.listConfig(); err != nil {
klog.ErrorS(err, "Unable to read config path", "path", s.path)
}
case e := <-s.watchEvents:
if err := s.consumeWatchEvent(e); err != nil {
klog.ErrorS(err, "Unable to process watch event")
}
}
}
}()
s.startWatch()
}
func (s *sourceFile) applyDefaults(pod *api.Pod, source string) error {
return applyDefaults(pod, source, true, s.nodeName)
}
func (s *sourceFile) listConfig() error {
path := s.path
statInfo, err := os.Stat(path)
if err != nil {
if !os.IsNotExist(err) {
return err
}
// Emit an update with an empty PodList to allow FileSource to be marked as seen
s.updates <- kubetypes.PodUpdate{Pods: []*v1.Pod{}, Op: kubetypes.SET, Source: kubetypes.FileSource}
return fmt.Errorf("path does not exist, ignoring")
}
switch {
case statInfo.Mode().IsDir():
pods, err := s.extractFromDir(path)
if err != nil {
return err
}
if len(pods) == 0 {
// Emit an update with an empty PodList to allow FileSource to be marked as seen
s.updates <- kubetypes.PodUpdate{Pods: pods, Op: kubetypes.SET, Source: kubetypes.FileSource}
return nil
}
return s.replaceStore(pods...)
case statInfo.Mode().IsRegular():
pod, err := s.extractFromFile(path)
if err != nil {
return err
}
return s.replaceStore(pod)
default:
return fmt.Errorf("path is not a directory or file")
}
}
// Get as many pod manifests as we can from a directory. Return an error if and only if something
// prevented us from reading anything at all. Do not return an error if only some files
// were problematic.
func (s *sourceFile) extractFromDir(name string) ([]*v1.Pod, error) {
dirents, err := filepath.Glob(filepath.Join(name, "[^.]*"))
if err != nil {
return nil, fmt.Errorf("glob failed: %v", err)
}
pods := make([]*v1.Pod, 0, len(dirents))
if len(dirents) == 0 {
return pods, nil
}
sort.Strings(dirents)
for _, path := range dirents {
statInfo, err := os.Stat(path)
if err != nil {
klog.ErrorS(err, "Could not get metadata", "path", path)
continue
}
switch {
case statInfo.Mode().IsDir():
klog.ErrorS(nil, "Provided manifest path is a directory, not recursing into manifest path", "path", path)
case statInfo.Mode().IsRegular():
pod, err := s.extractFromFile(path)
if err != nil {
if !os.IsNotExist(err) {
klog.ErrorS(err, "Could not process manifest file", "path", path)
}
} else {
pods = append(pods, pod)
}
default:
klog.ErrorS(nil, "Manifest path is not a directory or file", "path", path, "mode", statInfo.Mode())
}
}
return pods, nil
}
// extractFromFile parses a file for Pod configuration information.
func (s *sourceFile) extractFromFile(filename string) (pod *v1.Pod, err error) {
klog.V(3).InfoS("Reading config file", "path", filename)
defer func() {
if err == nil && pod != nil {
objKey, keyErr := cache.MetaNamespaceKeyFunc(pod)
if keyErr != nil {
err = keyErr
return
}
s.fileKeyMapping[filename] = objKey
}
}()
file, err := os.Open(filename)
if err != nil {
return pod, err
}
defer file.Close()
data, err := utilio.ReadAtMost(file, maxConfigLength)
if err != nil {
return pod, err
}
defaultFn := func(pod *api.Pod) error {
return s.applyDefaults(pod, filename)
}
parsed, pod, podErr := tryDecodeSinglePod(data, defaultFn)
if parsed {
if podErr != nil {
return pod, podErr
}
return pod, nil
}
return pod, fmt.Errorf("%v: couldn't parse as pod(%v), please check config file", filename, podErr)
}
func (s *sourceFile) replaceStore(pods ...*v1.Pod) (err error) {
objs := []interface{}{}
for _, pod := range pods {
objs = append(objs, pod)
}
return s.store.Replace(objs, "")
}

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//go:build linux
// +build linux
/*
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 config
import (
"fmt"
"os"
"path/filepath"
"strings"
"time"
"github.com/fsnotify/fsnotify"
"k8s.io/klog/v2"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/util/flowcontrol"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
)
const (
retryPeriod = 1 * time.Second
maxRetryPeriod = 20 * time.Second
)
type retryableError struct {
message string
}
func (e *retryableError) Error() string {
return e.message
}
func (s *sourceFile) startWatch() {
backOff := flowcontrol.NewBackOff(retryPeriod, maxRetryPeriod)
backOffID := "watch"
go wait.Forever(func() {
if backOff.IsInBackOffSinceUpdate(backOffID, time.Now()) {
return
}
if err := s.doWatch(); err != nil {
klog.ErrorS(err, "Unable to read config path", "path", s.path)
if _, retryable := err.(*retryableError); !retryable {
backOff.Next(backOffID, time.Now())
}
}
}, retryPeriod)
}
func (s *sourceFile) doWatch() error {
_, err := os.Stat(s.path)
if err != nil {
if !os.IsNotExist(err) {
return err
}
// Emit an update with an empty PodList to allow FileSource to be marked as seen
s.updates <- kubetypes.PodUpdate{Pods: []*v1.Pod{}, Op: kubetypes.SET, Source: kubetypes.FileSource}
return &retryableError{"path does not exist, ignoring"}
}
w, err := fsnotify.NewWatcher()
if err != nil {
return fmt.Errorf("unable to create inotify: %v", err)
}
defer w.Close()
err = w.Add(s.path)
if err != nil {
return fmt.Errorf("unable to create inotify for path %q: %v", s.path, err)
}
for {
select {
case event := <-w.Events:
if err = s.produceWatchEvent(&event); err != nil {
return fmt.Errorf("error while processing inotify event (%+v): %v", event, err)
}
case err = <-w.Errors:
return fmt.Errorf("error while watching %q: %v", s.path, err)
}
}
}
func (s *sourceFile) produceWatchEvent(e *fsnotify.Event) error {
// Ignore file start with dots
if strings.HasPrefix(filepath.Base(e.Name), ".") {
klog.V(4).InfoS("Ignored pod manifest, because it starts with dots", "eventName", e.Name)
return nil
}
var eventType podEventType
switch {
case (e.Op & fsnotify.Create) > 0:
eventType = podAdd
case (e.Op & fsnotify.Write) > 0:
eventType = podModify
case (e.Op & fsnotify.Chmod) > 0:
eventType = podModify
case (e.Op & fsnotify.Remove) > 0:
eventType = podDelete
case (e.Op & fsnotify.Rename) > 0:
eventType = podDelete
default:
// Ignore rest events
return nil
}
s.watchEvents <- &watchEvent{e.Name, eventType}
return nil
}
func (s *sourceFile) consumeWatchEvent(e *watchEvent) error {
switch e.eventType {
case podAdd, podModify:
pod, err := s.extractFromFile(e.fileName)
if err != nil {
return fmt.Errorf("can't process config file %q: %v", e.fileName, err)
}
return s.store.Add(pod)
case podDelete:
if objKey, keyExist := s.fileKeyMapping[e.fileName]; keyExist {
pod, podExist, err := s.store.GetByKey(objKey)
if err != nil {
return err
}
if !podExist {
return fmt.Errorf("the pod with key %s doesn't exist in cache", objKey)
}
if err = s.store.Delete(pod); err != nil {
return fmt.Errorf("failed to remove deleted pod from cache: %v", err)
}
delete(s.fileKeyMapping, e.fileName)
}
}
return nil
}

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//go:build !linux
// +build !linux
/*
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 config
import (
"fmt"
"k8s.io/klog/v2"
)
func (s *sourceFile) startWatch() {
klog.ErrorS(nil, "Watching source file is unsupported in this build")
}
func (s *sourceFile) consumeWatchEvent(e *watchEvent) error {
return fmt.Errorf("consuming watch event is unsupported in this build")
}

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vendor/k8s.io/kubernetes/pkg/kubelet/config/flags.go generated vendored Normal file
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/*
Copyright 2017 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 config
import (
"fmt"
"github.com/spf13/pflag"
)
// ContainerRuntimeOptions defines options for the container runtime.
type ContainerRuntimeOptions struct {
// General Options.
// RuntimeCgroups that container runtime is expected to be isolated in.
RuntimeCgroups string
// PodSandboxImage is the image whose network/ipc namespaces
// containers in each pod will use.
PodSandboxImage string
// Image credential provider plugin options
// ImageCredentialProviderConfigFile is the path to the credential provider plugin config file.
// This config file is a specification for what credential providers are enabled and invoked
// by the kubelet. The plugin config should contain information about what plugin binary
// to execute and what container images the plugin should be called for.
// +optional
ImageCredentialProviderConfigFile string
// ImageCredentialProviderBinDir is the path to the directory where credential provider plugin
// binaries exist. The name of each plugin binary is expected to match the name of the plugin
// specified in imageCredentialProviderConfigFile.
// +optional
ImageCredentialProviderBinDir string
}
// AddFlags adds flags to the container runtime, according to ContainerRuntimeOptions.
func (s *ContainerRuntimeOptions) AddFlags(fs *pflag.FlagSet) {
// General settings.
fs.StringVar(&s.RuntimeCgroups, "runtime-cgroups", s.RuntimeCgroups, "Optional absolute name of cgroups to create and run the runtime in.")
fs.StringVar(&s.PodSandboxImage, "pod-infra-container-image", s.PodSandboxImage, fmt.Sprintf("Specified image will not be pruned by the image garbage collector. CRI implementations have their own configuration to set this image."))
_ = fs.MarkDeprecated("pod-infra-container-image", "will be removed in 1.35. Image garbage collector will get sandbox image information from CRI.")
// Image credential provider settings.
fs.StringVar(&s.ImageCredentialProviderConfigFile, "image-credential-provider-config", s.ImageCredentialProviderConfigFile, "The path to the credential provider plugin config file.")
fs.StringVar(&s.ImageCredentialProviderBinDir, "image-credential-provider-bin-dir", s.ImageCredentialProviderBinDir, "The path to the directory where credential provider plugin binaries are located.")
}

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vendor/k8s.io/kubernetes/pkg/kubelet/config/http.go generated vendored Normal file
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/*
Copyright 2014 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 config
import (
"bytes"
"fmt"
"net/http"
"time"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/wait"
api "k8s.io/kubernetes/pkg/apis/core"
kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
"k8s.io/apimachinery/pkg/types"
"k8s.io/klog/v2"
utilio "k8s.io/utils/io"
)
type sourceURL struct {
url string
header http.Header
nodeName types.NodeName
updates chan<- interface{}
data []byte
failureLogs int
client *http.Client
}
// NewSourceURL specifies the URL where to read the Pod configuration from, then watches it for changes.
func NewSourceURL(url string, header http.Header, nodeName types.NodeName, period time.Duration, updates chan<- interface{}) {
config := &sourceURL{
url: url,
header: header,
nodeName: nodeName,
updates: updates,
data: nil,
// Timing out requests leads to retries. This client is only used to
// read the manifest URL passed to kubelet.
client: &http.Client{Timeout: 10 * time.Second},
}
klog.V(1).InfoS("Watching URL", "URL", url)
go wait.Until(config.run, period, wait.NeverStop)
}
func (s *sourceURL) run() {
if err := s.extractFromURL(); err != nil {
// Don't log this multiple times per minute. The first few entries should be
// enough to get the point across.
if s.failureLogs < 3 {
klog.InfoS("Failed to read pods from URL", "err", err)
} else if s.failureLogs == 3 {
klog.InfoS("Failed to read pods from URL. Dropping verbosity of this message to V(4)", "err", err)
} else {
klog.V(4).InfoS("Failed to read pods from URL", "err", err)
}
s.failureLogs++
} else {
if s.failureLogs > 0 {
klog.InfoS("Successfully read pods from URL")
s.failureLogs = 0
}
}
}
func (s *sourceURL) applyDefaults(pod *api.Pod) error {
return applyDefaults(pod, s.url, false, s.nodeName)
}
func (s *sourceURL) extractFromURL() error {
req, err := http.NewRequest("GET", s.url, nil)
if err != nil {
return err
}
req.Header = s.header
resp, err := s.client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
data, err := utilio.ReadAtMost(resp.Body, maxConfigLength)
if err != nil {
return err
}
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("%v: %v", s.url, resp.Status)
}
if len(data) == 0 {
// Emit an update with an empty PodList to allow HTTPSource to be marked as seen
s.updates <- kubetypes.PodUpdate{Pods: []*v1.Pod{}, Op: kubetypes.SET, Source: kubetypes.HTTPSource}
return fmt.Errorf("zero-length data received from %v", s.url)
}
// Short circuit if the data has not changed since the last time it was read.
if bytes.Equal(data, s.data) {
return nil
}
s.data = data
// First try as it is a single pod.
parsed, pod, singlePodErr := tryDecodeSinglePod(data, s.applyDefaults)
if parsed {
if singlePodErr != nil {
// It parsed but could not be used.
return singlePodErr
}
s.updates <- kubetypes.PodUpdate{Pods: []*v1.Pod{pod}, Op: kubetypes.SET, Source: kubetypes.HTTPSource}
return nil
}
// That didn't work, so try a list of pods.
parsed, podList, multiPodErr := tryDecodePodList(data, s.applyDefaults)
if parsed {
if multiPodErr != nil {
// It parsed but could not be used.
return multiPodErr
}
pods := make([]*v1.Pod, 0, len(podList.Items))
for i := range podList.Items {
pods = append(pods, &podList.Items[i])
}
s.updates <- kubetypes.PodUpdate{Pods: pods, Op: kubetypes.SET, Source: kubetypes.HTTPSource}
return nil
}
return fmt.Errorf("%v: received '%v', but couldn't parse as "+
"single (%v) or multiple pods (%v)",
s.url, string(data), singlePodErr, multiPodErr)
}

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vendor/k8s.io/kubernetes/pkg/kubelet/config/mux.go generated vendored Normal file
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/*
Copyright 2014 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 config
import (
"context"
"sync"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/klog/v2"
)
type merger interface {
// Invoked when a change from a source is received. May also function as an incremental
// merger if you wish to consume changes incrementally. Must be reentrant when more than
// one source is defined.
Merge(source string, update interface{}) error
}
// mux is a class for merging configuration from multiple sources. Changes are
// pushed via channels and sent to the merge function.
type mux struct {
// Invoked when an update is sent to a source.
merger merger
// Sources and their lock.
sourceLock sync.RWMutex
// Maps source names to channels
sources map[string]chan interface{}
}
// newMux creates a new mux that can merge changes from multiple sources.
func newMux(merger merger) *mux {
mux := &mux{
sources: make(map[string]chan interface{}),
merger: merger,
}
return mux
}
// ChannelWithContext returns a channel where a configuration source
// can send updates of new configurations. Multiple calls with the same
// source will return the same channel. This allows change and state based sources
// to use the same channel. Different source names however will be treated as a
// union.
func (m *mux) ChannelWithContext(ctx context.Context, source string) chan interface{} {
if len(source) == 0 {
panic("Channel given an empty name")
}
m.sourceLock.Lock()
defer m.sourceLock.Unlock()
channel, exists := m.sources[source]
if exists {
return channel
}
newChannel := make(chan interface{})
m.sources[source] = newChannel
go wait.Until(func() { m.listen(source, newChannel) }, 0, ctx.Done())
return newChannel
}
func (m *mux) listen(source string, listenChannel <-chan interface{}) {
for update := range listenChannel {
if err := m.merger.Merge(source, update); err != nil {
klog.InfoS("failed merging update", "err", err)
}
}
}

67
vendor/k8s.io/kubernetes/pkg/kubelet/config/sources.go generated vendored Normal file
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@ -0,0 +1,67 @@
/*
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 config implements the pod configuration readers.
package config
import (
"sync"
"k8s.io/apimachinery/pkg/util/sets"
)
// SourcesReadyFn is function that returns true if the specified sources have been seen.
type SourcesReadyFn func(sourcesSeen sets.Set[string]) bool
// SourcesReady tracks the set of configured sources seen by the kubelet.
type SourcesReady interface {
// AddSource adds the specified source to the set of sources managed.
AddSource(source string)
// AllReady returns true if the currently configured sources have all been seen.
AllReady() bool
}
// NewSourcesReady returns a SourcesReady with the specified function.
func NewSourcesReady(sourcesReadyFn SourcesReadyFn) SourcesReady {
return &sourcesImpl{
sourcesSeen: sets.New[string](),
sourcesReadyFn: sourcesReadyFn,
}
}
// sourcesImpl implements SourcesReady. It is thread-safe.
type sourcesImpl struct {
// lock protects access to sources seen.
lock sync.RWMutex
// set of sources seen.
sourcesSeen sets.Set[string]
// sourcesReady is a function that evaluates if the sources are ready.
sourcesReadyFn SourcesReadyFn
}
// Add adds the specified source to the set of sources managed.
func (s *sourcesImpl) AddSource(source string) {
s.lock.Lock()
defer s.lock.Unlock()
s.sourcesSeen.Insert(source)
}
// AllReady returns true if each configured source is ready.
func (s *sourcesImpl) AllReady() bool {
s.lock.RLock()
defer s.lock.RUnlock()
return s.sourcesReadyFn(s.sourcesSeen)
}