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pod_iptables_eip.go
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pod_iptables_eip.go
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package controller
import (
"context"
"fmt"
"strings"
kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
"github.com/kubeovn/kube-ovn/pkg/util"
v1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
)
func (c *Controller) enqueueAddPodAnnotatedIptablesEip(obj interface{}) {
var key string
var err error
if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
utilruntime.HandleError(err)
return
}
p := obj.(*v1.Pod)
if p.Spec.HostNetwork {
return
}
if p.Annotations[util.FipEnableAnnotation] != "true" {
return
}
eipName := PodNameToEipName(p.Name, p.Namespace)
if v, ok := p.Annotations[util.EipNameAnnotation]; ok {
v = strings.Trim(v, " ")
if v != "" {
eipName = v
}
}
// delete eip if pod not alive
if !isPodAlive(p) {
isStateful, statefulSetName := isStatefulSetPod(p)
isVmPod, vmName := isVmPod(p)
if isStateful || (isVmPod && c.config.EnableKeepVmIP) {
if isStateful && isStatefulSetDeleted(c.config.KubeClient, p, statefulSetName) {
klog.V(3).Infof("enqueue delete pod annotated iptables eip %s", eipName)
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
if isVmPod && c.isVmPodToDel(p, vmName) {
klog.V(3).Infof("enqueue delete pod annotated iptables eip %s", eipName)
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
} else {
klog.V(3).Infof("enqueue delete pod annotated iptables eip %s", eipName)
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
return
}
klog.V(3).Infof("enqueue add pod annotated iptables eip %s", eipName)
c.addPodAnnotatedIptablesEipQueue.Add(key)
}
func (c *Controller) enqueueUpdatePodAnnotatedIptablesEip(oldObj, newObj interface{}) {
oldPod := oldObj.(*v1.Pod)
newPod := newObj.(*v1.Pod)
if oldPod.ResourceVersion == newPod.ResourceVersion {
return
}
if oldPod.Spec.HostNetwork {
return
}
var key string
var err error
if key, err = cache.MetaNamespaceKeyFunc(newObj); err != nil {
utilruntime.HandleError(err)
return
}
if oldPod.Annotations[util.FipEnableAnnotation] != "true" && newPod.Annotations[util.FipEnableAnnotation] == "true" {
// pod need eip after add fip annotation
klog.V(3).Infof("enqueue add annotated iptables eip for pod %s/%s", newPod.Namespace, newPod.Name)
c.addPodAnnotatedIptablesEipQueue.Add(key)
return
}
if oldPod.Annotations[util.FipEnableAnnotation] == "true" && newPod.Annotations[util.FipEnableAnnotation] != "true" {
// pod not need eip after remove fip annotation
klog.V(3).Infof("enqueue delete annotated iptables eip for pod %s/%s", newPod.Namespace, newPod.Name)
c.delPodAnnotatedIptablesEipQueue.Add(newObj)
return
}
if newPod.DeletionTimestamp != nil && len(newPod.Finalizers) == 0 {
// avoid delete eip twice
return
}
isStateful, _ := isStatefulSetPod(newPod)
isVmPod, vmName := isVmPod(newPod)
if newPod.DeletionTimestamp != nil && isStateful {
c.delPodAnnotatedIptablesEipQueue.Add(newObj)
return
}
if !isPodAlive(newPod) && !isStateful && !isVmPod {
c.delPodAnnotatedIptablesEipQueue.Add(newObj)
return
}
if c.config.EnableKeepVmIP && isVmPod && c.isVmPodToDel(newPod, vmName) {
c.delPodAnnotatedIptablesEipQueue.Add(newObj)
return
}
}
func (c *Controller) enqueueDeletePodAnnotatedIptablesEip(obj interface{}) {
var err error
if _, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
utilruntime.HandleError(err)
return
}
p := obj.(*v1.Pod)
if p.Spec.HostNetwork {
return
}
if p.Annotations[util.FipEnableAnnotation] != "true" {
return
}
isStateful, statefulSetName := isStatefulSetPod(p)
isVmPod, vmName := isVmPod(p)
if isStateful {
if isStatefulSetDeleted(c.config.KubeClient, p, statefulSetName) {
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
if delete, err := appendCheckPodToDel(c, p, statefulSetName, "StatefulSet"); delete && err == nil {
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
} else if c.config.EnableKeepVmIP && isVmPod {
if c.isVmPodToDel(p, vmName) {
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
if delete, err := appendCheckPodToDel(c, p, vmName, util.VmInstance); delete && err == nil {
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
} else {
c.delPodAnnotatedIptablesEipQueue.Add(obj)
return
}
}
func (c *Controller) runAddPodAnnotatedIptablesEipWorker() {
for c.processNextAddPodAnnotatedIptablesEipWorkItem() {
}
}
func (c *Controller) runDelPodAnnotatedIptablesEipWorker() {
for c.processNextDeletePodAnnotatedIptablesEipWorkItem() {
}
}
func (c *Controller) processNextAddPodAnnotatedIptablesEipWorkItem() bool {
obj, shutdown := c.addPodAnnotatedIptablesEipQueue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.addPodAnnotatedIptablesEipQueue.Done(obj)
var key string
var ok bool
if key, ok = obj.(string); !ok {
c.addPodAnnotatedIptablesEipQueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
return nil
}
if err := c.handleAddPodAnnotatedIptablesEip(key); err != nil {
c.addPodAnnotatedIptablesEipQueue.AddRateLimited(key)
return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
}
c.addPodAnnotatedIptablesEipQueue.Forget(obj)
return nil
}(obj)
if err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
func (c *Controller) processNextDeletePodAnnotatedIptablesEipWorkItem() bool {
obj, shutdown := c.delPodAnnotatedIptablesEipQueue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.delPodAnnotatedIptablesEipQueue.Done(obj)
var pod *v1.Pod
var ok bool
if pod, ok = obj.(*v1.Pod); !ok {
c.delPodAnnotatedIptablesEipQueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected pod in workqueue but got %#v", obj))
return nil
}
if err := c.handleDeletePodAnnotatedIptablesEip(pod); err != nil {
c.delPodAnnotatedIptablesEipQueue.AddRateLimited(obj)
return fmt.Errorf("error syncing '%s': %s, requeuing", pod.Name, err.Error())
}
c.delPodAnnotatedIptablesEipQueue.Forget(obj)
return nil
}(obj)
if err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
func (c *Controller) handleAddPodAnnotatedIptablesEip(key string) error {
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
utilruntime.HandleError(fmt.Errorf("invalid resource key: %s", key))
return nil
}
cachedPod, err := c.podsLister.Pods(namespace).Get(name)
if err != nil {
if k8serrors.IsNotFound(err) {
return nil
}
return err
}
if cachedPod.Annotations[util.FipEnableAnnotation] != "true" {
// not enable fip
return nil
}
if cachedPod.Annotations[util.EipAnnotation] != "" {
// eip aleady ok
return nil
}
eipName := PodNameToEipName(cachedPod.Name, cachedPod.Namespace)
if v, ok := cachedPod.Annotations[util.EipNameAnnotation]; ok {
v = strings.Trim(v, " ")
if v != "" {
eipName = v
}
}
newPod := cachedPod.DeepCopy()
if newPod.Annotations[util.AllocatedAnnotation] != "true" {
err = fmt.Errorf("pod network not allocated, failed to create iptables eip %s", eipName)
return err
}
if _, err = c.iptablesEipsLister.Get(eipName); err != nil {
if !k8serrors.IsNotFound(err) {
return err
}
klog.V(3).Infof("handle add pod annotated iptables eip %s", eipName)
subnet := newPod.Annotations[util.LogicalSwitchAnnotation]
router := newPod.Annotations[util.LogicalRouterAnnotation]
natGw, err := c.getNatGw(router, subnet)
if err != nil {
klog.Errorf("failed to get vpc nat gw eip: %v", eipName, err)
return err
}
if err := c.createOrUpdateCrdEip(eipName, "", "", "", natGw); err != nil {
klog.Errorf("failed to create eip %s: %v", eipName, err)
return err
}
}
// check eip if ready and update pod eip annotation
var eip *kubeovnv1.IptablesEIP
if eip, err = c.iptablesEipsLister.Get(eipName); err != nil {
return err
}
// update pod eip annotation
if eip.Status.IP != "" {
newPod.Annotations[util.EipAnnotation] = eip.Status.IP
patch, err := util.GenerateStrategicMergePatchPayload(cachedPod, newPod)
if err != nil {
return err
}
if _, err := c.config.KubeClient.CoreV1().Pods(namespace).Patch(context.Background(), name,
types.StrategicMergePatchType, patch, metav1.PatchOptions{}, ""); err != nil {
if k8serrors.IsNotFound(err) {
return nil
}
klog.Errorf("patch pod %s/%s annotation eip failed: %v", name, namespace, err)
return err
}
} else {
return fmt.Errorf("eip %s not ready", eipName)
}
return nil
}
func (c *Controller) handleDeletePodAnnotatedIptablesEip(pod *v1.Pod) error {
var err error
var keepEipCR bool
klog.V(3).Infof("handle delete annotated iptables eip for pod %s/%s", pod.Namespace, pod.Name)
// keep statefulset eip cr
if isStateful, statefulSetName := isStatefulSetPod(pod); isStateful {
if !isStatefulSetDeleted(c.config.KubeClient, pod, statefulSetName) {
keepEipCR = true
}
}
eipName := PodNameToEipName(pod.Name, pod.Namespace)
if v, ok := pod.Annotations[util.EipNameAnnotation]; ok {
// keep named eip cr
v = strings.Trim(v, " ")
if v != "" {
keepEipCR = true
eipName = v
}
}
if keepEipCR {
return nil
}
klog.V(3).Infof("delete pod annotated iptables eip cr %s", eipName)
if err = c.config.KubeOvnClient.KubeovnV1().IptablesEIPs().Delete(context.Background(), eipName, metav1.DeleteOptions{}); err != nil {
if !k8serrors.IsNotFound(err) {
klog.Errorf("failed to delete iptables eip %s: %v", eipName, err)
return err
}
}
return nil
}
func PodNameToEipName(name, namespace string) string {
return fmt.Sprintf("%s.%s", name, namespace)
}
func isStatefulSetDeleted(c kubernetes.Interface, pod *v1.Pod, statefulSetName string) bool {
// return true if statefulset is deleted or in deleting
ss, err := c.AppsV1().StatefulSets(pod.Namespace).Get(context.Background(), statefulSetName, metav1.GetOptions{})
if err != nil {
if k8serrors.IsNotFound(err) {
// statefulset is deleted
return true
} else {
klog.Errorf("failed to get statefulset %v", err)
return false
}
}
// statefulset is deleting
if ss.DeletionTimestamp != nil {
return true
}
return false
}