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podController.go
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podController.go
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// Copyright 2018 Microsoft. All rights reserved.
// MIT License
package npm
import (
"fmt"
"reflect"
"time"
"github.com/Azure/azure-container-networking/npm/ipsm"
"github.com/Azure/azure-container-networking/npm/metrics"
"github.com/Azure/azure-container-networking/npm/util"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
coreinformer "k8s.io/client-go/informers/core/v1"
corelisters "k8s.io/client-go/listers/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
"k8s.io/klog"
)
// NamedPortOperation decides opeartion (e.g., delete or add) for named port ipset in manageNamedPortIpsets
type NamedPortOperation string
const (
DeleteNamedPortIpsets NamedPortOperation = "del"
AddNamedPortIpsets NamedPortOperation = "add"
)
type NpmPod struct {
Name string
Namespace string
PodIP string
Labels map[string]string
ContainerPorts []corev1.ContainerPort
Phase corev1.PodPhase
}
func newNpmPod(podObj *corev1.Pod) *NpmPod {
return &NpmPod{
Name: podObj.ObjectMeta.Name,
Namespace: podObj.ObjectMeta.Namespace,
PodIP: podObj.Status.PodIP,
Labels: make(map[string]string),
ContainerPorts: []corev1.ContainerPort{},
Phase: podObj.Status.Phase,
}
}
/* (TODO) commenting function as it not being used today.
But useful to keep for future
// getPodObjFromNpmObj returns a new pod object based on NpmPod
func (nPod *NpmPod) getPodObjFromNpmPodObj() *corev1.Pod {
return &corev1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: nPod.Name,
Namespace: nPod.Namespace,
Labels: nPod.Labels,
},
Status: corev1.PodStatus{
Phase: nPod.Phase,
PodIP: nPod.PodIP,
},
Spec: corev1.PodSpec{
HostNetwork: nPod.IsHostNetwork,
Containers: []corev1.Container{
corev1.Container{
Ports: nPod.ContainerPorts,
},
},
},
}
} */
func (nPod *NpmPod) appendLabels(new map[string]string, clear LabelAppendOperation) {
if clear {
nPod.Labels = make(map[string]string)
}
for k, v := range new {
nPod.Labels[k] = v
}
}
func (nPod *NpmPod) removeLabelsWithKey(key string) {
delete(nPod.Labels, key)
}
func (nPod *NpmPod) appendContainerPorts(podObj *corev1.Pod) {
nPod.ContainerPorts = getContainerPortList(podObj)
}
func (nPod *NpmPod) removeContainerPorts() {
nPod.ContainerPorts = []corev1.ContainerPort{}
}
// This function can be expanded to other attribs if needed
func (nPod *NpmPod) updateNpmPodAttributes(podObj *corev1.Pod) {
if nPod.Phase != podObj.Status.Phase {
nPod.Phase = podObj.Status.Phase
}
}
type podController struct {
clientset kubernetes.Interface
podLister corelisters.PodLister
podListerSynced cache.InformerSynced
workqueue workqueue.RateLimitingInterface
//podCache map[string]*corev1.Pod
// (TODO): podController does not need to have whole NetworkPolicyManager pointer. Need to improve it
npMgr *NetworkPolicyManager
}
func NewPodController(podInformer coreinformer.PodInformer, clientset kubernetes.Interface, npMgr *NetworkPolicyManager) *podController {
podController := &podController{
clientset: clientset,
podLister: podInformer.Lister(),
podListerSynced: podInformer.Informer().HasSynced,
workqueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "Pods"),
npMgr: npMgr,
}
podInformer.Informer().AddEventHandler(
cache.ResourceEventHandlerFuncs{
AddFunc: podController.addPod,
UpdateFunc: podController.updatePod,
DeleteFunc: podController.deletePod,
},
)
return podController
}
// needSync filters the event if the event is not required to handle
func (c *podController) needSync(eventType string, obj interface{}) (string, bool) {
needSync := false
var key string
podObj, ok := obj.(*corev1.Pod)
if !ok {
metrics.SendErrorLogAndMetric(util.PodID, "ADD Pod: Received unexpected object type: %v", obj)
return key, needSync
}
klog.Infof("[POD %s EVENT] for %s in %s", eventType, podObj.Name, podObj.Namespace)
if !hasValidPodIP(podObj) {
return key, needSync
}
if isHostNetworkPod(podObj) {
klog.Infof("[POD %s EVENT] HostNetwork POD IGNORED: [%s/%s/%s/%+v%s]",
eventType, podObj.GetObjectMeta().GetUID(), podObj.Namespace, podObj.Name, podObj.Labels, podObj.Status.PodIP)
return key, needSync
}
var err error
if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
utilruntime.HandleError(err)
metrics.SendErrorLogAndMetric(util.PodID, "[POD %s EVENT] Error: podKey is empty for %s pod in %s with UID %s",
eventType, podObj.Name, util.GetNSNameWithPrefix(podObj.Namespace), podObj.UID)
return key, needSync
}
needSync = true
return key, needSync
}
func (c *podController) addPod(obj interface{}) {
key, needSync := c.needSync("ADD", obj)
if !needSync {
return
}
podObj, _ := obj.(*corev1.Pod)
// If newPodObj status is either corev1.PodSucceeded or corev1.PodFailed or DeletionTimestamp is set, do not need to add it into workqueue.
if isCompletePod(podObj) {
return
}
c.workqueue.Add(key)
}
func (c *podController) updatePod(old, new interface{}) {
key, needSync := c.needSync("UPDATE", new)
if !needSync {
klog.Infof("[POD UPDATE EVENT] No need to sync this pod")
return
}
// needSync checked validation of casting newPod.
newPod, _ := new.(*corev1.Pod)
oldPod, ok := old.(*corev1.Pod)
if ok {
if oldPod.ResourceVersion == newPod.ResourceVersion {
// Periodic resync will send update events for all known pods.
// Two different versions of the same pods will always have different RVs.
klog.Infof("[POD UPDATE EVENT] Two pods have the same RVs")
return
}
}
c.npMgr.Lock()
defer c.npMgr.Unlock()
cachedNpmPodObj, npmPodExists := c.npMgr.PodMap[key]
if npmPodExists {
// if newPod does not have different states against lastly applied states stored in cachedNpmPodObj,
// podController does not need to reconcile this update.
// in this updatePod event, newPod was updated with states which PodController does not need to reconcile.
if isInvalidPodUpdate(cachedNpmPodObj, newPod) {
return
}
}
c.workqueue.Add(key)
}
func (c *podController) deletePod(obj interface{}) {
podObj, ok := obj.(*corev1.Pod)
// DeleteFunc gets the final state of the resource (if it is known).
// Otherwise, it gets an object of type DeletedFinalStateUnknown.
// This can happen if the watch is closed and misses the delete event and
// the controller doesn't notice the deletion until the subsequent re-list
if !ok {
tombstone, ok := obj.(cache.DeletedFinalStateUnknown)
if !ok {
metrics.SendErrorLogAndMetric(util.PodID, "[POD DELETE EVENT] Pod: Received unexpected object type: %v", obj)
return
}
if podObj, ok = tombstone.Obj.(*corev1.Pod); !ok {
metrics.SendErrorLogAndMetric(util.PodID, "[POD DELETE EVENT] Pod: Received unexpected object type (error decoding object tombstone, invalid type): %v", obj)
return
}
}
klog.Infof("[POD DELETE EVENT] for %s in %s", podObj.Name, podObj.Namespace)
if isHostNetworkPod(podObj) {
klog.Infof("[POD DELETE EVENT] HostNetwork POD IGNORED: [%s/%s/%s/%+v%s]", podObj.UID, podObj.Namespace, podObj.Name, podObj.Labels, podObj.Status.PodIP)
return
}
var err error
var key string
if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
utilruntime.HandleError(err)
metrics.SendErrorLogAndMetric(util.PodID, "[POD DELETE EVENT] Error: podKey is empty for %s pod in %s with UID %s",
podObj.ObjectMeta.Name, util.GetNSNameWithPrefix(podObj.Namespace), podObj.UID)
return
}
// (TODO): Reduce scope of lock later
c.npMgr.Lock()
defer c.npMgr.Unlock()
// If this pod object is not in the PodMap, we do not need to clean-up states for this pod
// since podController did not apply for any states for this pod
_, npmPodExists := c.npMgr.PodMap[key]
if !npmPodExists {
return
}
c.workqueue.Add(key)
}
func (c *podController) Run(threadiness int, stopCh <-chan struct{}) error {
defer utilruntime.HandleCrash()
defer c.workqueue.ShutDown()
klog.Infof("Starting Pod %d worker(s)", threadiness)
for i := 0; i < threadiness; i++ {
go wait.Until(c.runWorker, time.Second, stopCh)
}
klog.Info("Started Pod workers")
<-stopCh
klog.Info("Shutting down Pod workers")
return nil
}
func (c *podController) runWorker() {
for c.processNextWorkItem() {
}
}
func (c *podController) processNextWorkItem() bool {
obj, shutdown := c.workqueue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.workqueue.Done(obj)
var key string
var ok bool
if key, ok = obj.(string); !ok {
// As the item in the workqueue is actually invalid, we call
// Forget here else we'd go into a loop of attempting to
// process a work item that is invalid.
c.workqueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
return nil
}
// Run the syncPod, passing it the namespace/name string of the
// Pod resource to be synced.
// (TODO): may consider using "c.queue.AddAfter(key, *requeueAfter)" according to error type later
if err := c.syncPod(key); err != nil {
// Put the item back on the workqueue to handle any transient errors.
c.workqueue.AddRateLimited(key)
metrics.SendErrorLogAndMetric(util.PodID, "[podController processNextWorkItem] Error: failed to syncPod %s. Requeuing with err: %v", key, err)
return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
}
// Finally, if no error occurs we Forget this item so it does not
// get queued again until another change happens.
c.workqueue.Forget(obj)
klog.Infof("Successfully synced '%s'", key)
return nil
}(obj)
if err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
// syncPod compares the actual state with the desired, and attempts to converge the two.
func (c *podController) syncPod(key string) error {
// Convert the namespace/name string into a distinct namespace and name
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
utilruntime.HandleError(fmt.Errorf("invalid resource key: %s", key))
return nil
}
// Get the Pod resource with this namespace/name
pod, err := c.podLister.Pods(namespace).Get(name)
// (TODO): Reduce scope of lock later
c.npMgr.Lock()
defer c.npMgr.Unlock()
if err != nil {
if errors.IsNotFound(err) {
klog.Infof("pod %s not found, may be it is deleted", key)
// cleanUpDeletedPod will check if the pod exists in cache, if it does then proceeds with deletion
// if it does not exists, then event will be no-op
err = c.cleanUpDeletedPod(key)
if err != nil {
// need to retry this cleaning-up process
return fmt.Errorf("Error: %v when pod is not found\n", err)
}
return err
}
return err
}
// If newPodObj status is either corev1.PodSucceeded or corev1.PodFailed or DeletionTimestamp is set, start clean-up the lastly applied states.
if isCompletePod(pod) {
if err = c.cleanUpDeletedPod(key); err != nil {
return fmt.Errorf("Error: %v when when pod is in completed state.\n", err)
}
return nil
}
err = c.syncAddAndUpdatePod(pod)
if err != nil {
metrics.SendErrorLogAndMetric(util.PodID, "Error: Failed to sync pod due to %v", err)
return fmt.Errorf("Failed to sync pod due to %v\n", err)
}
return nil
}
func (c *podController) syncAddedPod(podObj *corev1.Pod) error {
podNs := util.GetNSNameWithPrefix(podObj.Namespace)
podKey, _ := cache.MetaNamespaceKeyFunc(podObj)
ipsMgr := c.npMgr.NsMap[util.KubeAllNamespacesFlag].IpsMgr
klog.Infof("POD CREATING: [%s%s/%s/%s%+v%s]", string(podObj.GetUID()), podNs, podObj.Name, podObj.Spec.NodeName, podObj.Labels, podObj.Status.PodIP)
// Add pod namespace if it doesn't exist
var err error
if _, exists := c.npMgr.NsMap[podNs]; !exists {
// (TODO): need to change newNS function. It always returns "nil"
c.npMgr.NsMap[podNs], _ = newNs(podNs)
klog.Infof("Creating set: %v, hashedSet: %v", podNs, util.GetHashedName(podNs))
if err = ipsMgr.CreateSet(podNs, append([]string{util.IpsetNetHashFlag})); err != nil {
return fmt.Errorf("[syncAddedPod] Error: creating ipset %s with err: %v", podNs, err)
}
}
npmPodObj := newNpmPod(podObj)
// Add the pod to its namespace's ipset.
klog.Infof("Adding pod %s to ipset %s", npmPodObj.PodIP, podNs)
if err = ipsMgr.AddToSet(podNs, npmPodObj.PodIP, util.IpsetNetHashFlag, podKey); err != nil {
return fmt.Errorf("[syncAddedPod] Error: failed to add pod to namespace ipset with err: %v", err)
}
// add the Pod info to the podMap
c.npMgr.PodMap[podKey] = npmPodObj
// Get lists of podLabelKey and podLabelKey + podLavelValue ,and then start adding them to ipsets.
for labelKey, labelVal := range podObj.Labels {
klog.Infof("Adding pod %s to ipset %s", npmPodObj.PodIP, labelKey)
if err = ipsMgr.AddToSet(labelKey, npmPodObj.PodIP, util.IpsetNetHashFlag, podKey); err != nil {
return fmt.Errorf("[syncAddedPod] Error: failed to add pod to label ipset with err: %v", err)
}
podIPSetName := util.GetIpSetFromLabelKV(labelKey, labelVal)
klog.Infof("Adding pod %s to ipset %s", npmPodObj.PodIP, podIPSetName)
if err = ipsMgr.AddToSet(podIPSetName, npmPodObj.PodIP, util.IpsetNetHashFlag, podKey); err != nil {
return fmt.Errorf("[syncAddedPod] Error: failed to add pod to label ipset with err: %v", err)
}
npmPodObj.appendLabels(map[string]string{labelKey: labelVal}, AppendToExistingLabels)
}
// Add pod's named ports from its ipset.
klog.Infof("Adding named port ipsets")
containerPorts := getContainerPortList(podObj)
if err = manageNamedPortIpsets(ipsMgr, containerPorts, podKey, npmPodObj.PodIP, AddNamedPortIpsets); err != nil {
return fmt.Errorf("[syncAddedPod] Error: failed to add pod to named port ipset with err: %v", err)
}
npmPodObj.appendContainerPorts(podObj)
return nil
}
// syncAddAndUpdatePod handles updating pod ip in its label's ipset.
func (c *podController) syncAddAndUpdatePod(newPodObj *corev1.Pod) error {
podKey, _ := cache.MetaNamespaceKeyFunc(newPodObj)
klog.Infof("[syncAddAndUpdatePod] updating Pod with key %s", podKey)
newPodObjNs := util.GetNSNameWithPrefix(newPodObj.ObjectMeta.Namespace)
ipsMgr := c.npMgr.NsMap[util.KubeAllNamespacesFlag].IpsMgr
// Add pod namespace if it doesn't exist
var err error
if _, exists := c.npMgr.NsMap[newPodObjNs]; !exists {
// (TODO): need to change newNS function. It always returns "nil"
c.npMgr.NsMap[newPodObjNs], _ = newNs(newPodObjNs)
klog.Infof("Creating set: %v, hashedSet: %v", newPodObjNs, util.GetHashedName(newPodObjNs))
if err = ipsMgr.CreateSet(newPodObjNs, []string{util.IpsetNetHashFlag}); err != nil {
return fmt.Errorf("[syncAddAndUpdatePod] Error: creating ipset %s with err: %v", newPodObjNs, err)
}
}
cachedNpmPodObj, exists := c.npMgr.PodMap[podKey]
// No cached npmPod exists. start adding the pod in a cache
if !exists {
if err = c.syncAddedPod(newPodObj); err != nil {
return err
}
return nil
}
// Dealing with "updatePod" event - Compare last applied states against current Pod states
// There are two possiblities for npmPodObj and newPodObj
// #1 case The same object with the same UID and the same key (namespace + name)
// #2 case Different objects with different UID, but the same key (namespace + name) due to missing some events for the old object
// Dealing with #2 pod update event, the IP addresses of cached npmPod and newPodObj are different
// NPM should clean up existing references of cached pod obj and its IP.
// then, re-add new pod obj.
if cachedNpmPodObj.PodIP != newPodObj.Status.PodIP {
metrics.SendErrorLogAndMetric(util.PodID, "[syncAddAndUpdatePod] Info: Unexpected state. Pod (Namespace:%s, Name:%s, newUid:%s) , has cachedPodIp:%s which is different from PodIp:%s",
newPodObjNs, newPodObj.Name, string(newPodObj.UID), cachedNpmPodObj.PodIP, newPodObj.Status.PodIP)
klog.Infof("Deleting cached Pod with key:%s first due to IP Mistmatch", podKey)
if err = c.cleanUpDeletedPod(podKey); err != nil {
return err
}
klog.Infof("Adding back Pod with key:%s after IP Mistmatch", podKey)
if err = c.syncAddedPod(newPodObj); err != nil {
return err
}
return nil
}
// Dealing with #1 pod update event, the IP addresses of cached npmPod and newPodObj are same
// If no change in labels, then GetIPSetListCompareLabels will return empty list.
// Otherwise it returns list of deleted PodIP from cached pod's labels and list of added PodIp from new pod's labels
addToIPSets, deleteFromIPSets := util.GetIPSetListCompareLabels(cachedNpmPodObj.Labels, newPodObj.Labels)
// Delete the pod from its label's ipset.
for _, podIPSetName := range deleteFromIPSets {
klog.Infof("Deleting pod %s from ipset %s", cachedNpmPodObj.PodIP, podIPSetName)
if err = ipsMgr.DeleteFromSet(podIPSetName, cachedNpmPodObj.PodIP, podKey); err != nil {
return fmt.Errorf("[syncAddAndUpdatePod] Error: failed to delete pod from label ipset with err: %v", err)
}
// {IMPORTANT} The order of compared list will be key and then key+val. NPM should only append after both key
// key + val ipsets are worked on. 0th index will be key and 1st index will be value of the label
removedLabelKey, removedLabelValue := util.GetLabelKVFromSet(podIPSetName)
if removedLabelValue != "" {
cachedNpmPodObj.removeLabelsWithKey(removedLabelKey)
}
}
// Add the pod to its label's ipset.
for _, addIPSetName := range addToIPSets {
klog.Infof("Adding pod %s to ipset %s", newPodObj.Status.PodIP, addIPSetName)
if err = ipsMgr.AddToSet(addIPSetName, newPodObj.Status.PodIP, util.IpsetNetHashFlag, podKey); err != nil {
return fmt.Errorf("[syncAddAndUpdatePod] Error: failed to add pod to label ipset with err: %v", err)
}
// {IMPORTANT} Same as above order is assumed to be key and then key+val. NPM should only append to existing labels
// only after both ipsets for a given label's key value pair are added successfully
// (TODO) will need to remove this ordering dependency
addedLabelKey, addedLabelValue := util.GetLabelKVFromSet(addIPSetName)
if addedLabelValue != "" {
cachedNpmPodObj.appendLabels(map[string]string{addedLabelKey: addedLabelValue}, AppendToExistingLabels)
}
}
// This will ensure after all labels are worked on to overwrite. This way will reduce any bugs introduced above
// If due to ordering issue the above deleted and added labels are not correct,
// this below appendLabels will help ensure correct state in cache for all successful ops.
cachedNpmPodObj.appendLabels(newPodObj.Labels, ClearExistingLabels)
// (TODO): optimize named port addition and deletions.
// named ports are mostly static once configured in todays usage pattern
// so keeping this simple by deleting all and re-adding
newPodPorts := getContainerPortList(newPodObj)
if !reflect.DeepEqual(cachedNpmPodObj.ContainerPorts, newPodPorts) {
// Delete cached pod's named ports from its ipset.
if err = manageNamedPortIpsets(ipsMgr, cachedNpmPodObj.ContainerPorts, podKey, cachedNpmPodObj.PodIP, DeleteNamedPortIpsets); err != nil {
return fmt.Errorf("[syncAddAndUpdatePod] Error: failed to delete pod from named port ipset with err: %v", err)
}
// Since portList ipset deletion is successful, NPM can remove cachedContainerPorts
cachedNpmPodObj.removeContainerPorts()
// Add new pod's named ports from its ipset.
if err = manageNamedPortIpsets(ipsMgr, newPodPorts, podKey, newPodObj.Status.PodIP, AddNamedPortIpsets); err != nil {
return fmt.Errorf("[syncAddAndUpdatePod] Error: failed to add pod to named port ipset with err: %v", err)
}
cachedNpmPodObj.appendContainerPorts(newPodObj)
}
cachedNpmPodObj.updateNpmPodAttributes(newPodObj)
return nil
}
// cleanUpDeletedPod cleans up all ipset associated with this pod
func (c *podController) cleanUpDeletedPod(cachedNpmPodKey string) error {
klog.Infof("[cleanUpDeletedPod] deleting Pod with key %s", cachedNpmPodKey)
// If cached npmPod does not exist, return nil
cachedNpmPodObj, exist := c.npMgr.PodMap[cachedNpmPodKey]
if !exist {
return nil
}
podNs := util.GetNSNameWithPrefix(cachedNpmPodObj.Namespace)
ipsMgr := c.npMgr.NsMap[util.KubeAllNamespacesFlag].IpsMgr
var err error
// Delete the pod from its namespace's ipset.
if err = ipsMgr.DeleteFromSet(podNs, cachedNpmPodObj.PodIP, cachedNpmPodKey); err != nil {
return fmt.Errorf("[cleanUpDeletedPod] Error: failed to delete pod from namespace ipset with err: %v", err)
}
// Get lists of podLabelKey and podLabelKey + podLavelValue ,and then start deleting them from ipsets
for labelKey, labelVal := range cachedNpmPodObj.Labels {
klog.Infof("Deleting pod %s from ipset %s", cachedNpmPodObj.PodIP, labelKey)
if err = ipsMgr.DeleteFromSet(labelKey, cachedNpmPodObj.PodIP, cachedNpmPodKey); err != nil {
return fmt.Errorf("[cleanUpDeletedPod] Error: failed to delete pod from label ipset with err: %v", err)
}
podIPSetName := util.GetIpSetFromLabelKV(labelKey, labelVal)
klog.Infof("Deleting pod %s from ipset %s", cachedNpmPodObj.PodIP, podIPSetName)
if err = ipsMgr.DeleteFromSet(podIPSetName, cachedNpmPodObj.PodIP, cachedNpmPodKey); err != nil {
return fmt.Errorf("[cleanUpDeletedPod] Error: failed to delete pod from label ipset with err: %v", err)
}
cachedNpmPodObj.removeLabelsWithKey(labelKey)
}
// Delete pod's named ports from its ipset. Need to pass true in the manageNamedPortIpsets function call
if err = manageNamedPortIpsets(ipsMgr, cachedNpmPodObj.ContainerPorts, cachedNpmPodKey, cachedNpmPodObj.PodIP, DeleteNamedPortIpsets); err != nil {
return fmt.Errorf("[cleanUpDeletedPod] Error: failed to delete pod from named port ipset with err: %v", err)
}
delete(c.npMgr.PodMap, cachedNpmPodKey)
return nil
}
func isCompletePod(podObj *corev1.Pod) bool {
if podObj.DeletionTimestamp != nil {
return true
}
// K8s categorizes Succeeded and Failed pods as a terminated pod and will not restart them
// So NPM will ignorer adding these pods
if podObj.Status.Phase == corev1.PodSucceeded || podObj.Status.Phase == corev1.PodFailed {
return true
}
return false
}
func hasValidPodIP(podObj *corev1.Pod) bool {
return len(podObj.Status.PodIP) > 0
}
func isHostNetworkPod(podObj *corev1.Pod) bool {
return podObj.Spec.HostNetwork
}
func getContainerPortList(podObj *corev1.Pod) []corev1.ContainerPort {
portList := []corev1.ContainerPort{}
for _, container := range podObj.Spec.Containers {
portList = append(portList, container.Ports...)
}
return portList
}
// (TODO): better naming?
func isInvalidPodUpdate(npmPod *NpmPod, newPodObj *corev1.Pod) bool {
return npmPod.Namespace == newPodObj.ObjectMeta.Namespace &&
npmPod.Name == newPodObj.ObjectMeta.Name &&
npmPod.Phase == newPodObj.Status.Phase &&
npmPod.PodIP == newPodObj.Status.PodIP &&
newPodObj.ObjectMeta.DeletionTimestamp == nil &&
newPodObj.ObjectMeta.DeletionGracePeriodSeconds == nil &&
reflect.DeepEqual(npmPod.Labels, newPodObj.ObjectMeta.Labels) &&
reflect.DeepEqual(npmPod.ContainerPorts, getContainerPortList(newPodObj))
}
// manageNamedPortIpsets helps with adding or deleting Pod namedPort IPsets.
func manageNamedPortIpsets(ipsMgr *ipsm.IpsetManager, portList []corev1.ContainerPort, podKey string, podIP string, namedPortOperation NamedPortOperation) error {
for _, port := range portList {
klog.Infof("port is %+v", port)
if port.Name == "" {
continue
}
// K8s guarantees port.Protocol has "TCP", "UDP", or "SCTP" if the field exists.
var protocol string
if len(port.Protocol) != 0 {
// without adding ":" after protocol, ipset complains.
protocol = fmt.Sprintf("%s:", port.Protocol)
}
namedPortname := util.NamedPortIPSetPrefix + port.Name
var err error
switch namedPortOperation {
case DeleteNamedPortIpsets:
if err = ipsMgr.DeleteFromSet(namedPortname, fmt.Sprintf("%s,%s%d", podIP, protocol, port.ContainerPort), podKey); err != nil {
return err
}
case AddNamedPortIpsets:
klog.Info("in Adding named port ipsets")
if err = ipsMgr.AddToSet(namedPortname, fmt.Sprintf("%s,%s%d", podIP, protocol, port.ContainerPort), util.IpsetIPPortHashFlag, podKey); err != nil {
return err
}
}
}
return nil
}