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pod_iptables_fip.go
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pod_iptables_fip.go
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package controller
import (
"context"
"fmt"
"strings"
"time"
"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/tools/cache"
"k8s.io/klog/v2"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
)
func (c *Controller) enqueueAddPodAnnotatedIptablesFip(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
}
if !isPodAlive(p) {
isStateful, statefulSetName := isStatefulSetPod(p)
isVmPod, vmName := isVmPod(p)
if isStateful || (isVmPod && c.config.EnableKeepVmIP) {
if isStateful && isStatefulSetPodToDel(c.config.KubeClient, p, statefulSetName) {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
if isVmPod && c.isVmPodToDel(p, vmName) {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
} else {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
return
}
c.addPodAnnotatedIptablesFipQueue.Add(key)
}
func (c *Controller) enqueueUpdatePodAnnotatedIptablesFip(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 fip after add fip annotation
klog.V(3).Infof("enqueue add annotated iptables eip for pod %s/%s", newPod.Namespace, newPod.Name)
c.addPodAnnotatedIptablesFipQueue.Add(key)
return
}
if oldPod.Annotations[util.FipEnableAnnotation] == "true" && newPod.Annotations[util.FipEnableAnnotation] != "true" {
klog.V(3).Infof("enqueue delete annotated iptables fip for pod %s/%s", newPod.Namespace, newPod.Name)
c.delPodAnnotatedIptablesFipQueue.Add(newObj)
return
}
if newPod.DeletionTimestamp != nil && len(newPod.Finalizers) == 0 {
// avoid delete fip twice
return
}
isStateful, _ := isStatefulSetPod(newPod)
isVmPod, vmName := isVmPod(newPod)
if !isPodAlive(newPod) && !isStateful && !isVmPod {
c.delPodAnnotatedIptablesFipQueue.Add(newObj)
return
}
if newPod.DeletionTimestamp != nil && isStateful {
c.delPodAnnotatedIptablesFipQueue.Add(newObj)
return
}
if c.config.EnableKeepVmIP && isVmPod && c.isVmPodToDel(newPod, vmName) {
c.delPodAnnotatedIptablesFipQueue.Add(newObj)
return
}
}
func (c *Controller) enqueueDeletePodAnnotatedIptablesFip(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 isStatefulSetPodToDel(c.config.KubeClient, p, statefulSetName) {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
if delete, err := appendCheckPodToDel(c, p, statefulSetName, "StatefulSet"); delete && err == nil {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
} else if c.config.EnableKeepVmIP && isVmPod {
if c.isVmPodToDel(p, vmName) {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
if delete, err := appendCheckPodToDel(c, p, vmName, util.VmInstance); delete && err == nil {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
} else {
c.delPodAnnotatedIptablesFipQueue.Add(obj)
return
}
}
func (c *Controller) runAddPodAnnotatedIptablesFipWorker() {
for c.processNextAddPodAnnotatedIptablesFipWorkItem() {
}
}
func (c *Controller) runDelPodAnnotatedIptablesFipWorker() {
for c.processNextDeletePodAnnotatedIptablesFipWorkItem() {
}
}
func (c *Controller) processNextAddPodAnnotatedIptablesFipWorkItem() bool {
obj, shutdown := c.addPodAnnotatedIptablesFipQueue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.addPodAnnotatedIptablesFipQueue.Done(obj)
var key string
var ok bool
if key, ok = obj.(string); !ok {
c.addPodAnnotatedIptablesFipQueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
return nil
}
if err := c.handleAddPodAnnotatedIptablesFip(key); err != nil {
c.addPodAnnotatedIptablesFipQueue.AddRateLimited(key)
return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
}
c.addPodAnnotatedIptablesFipQueue.Forget(obj)
return nil
}(obj)
if err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
func (c *Controller) processNextDeletePodAnnotatedIptablesFipWorkItem() bool {
obj, shutdown := c.delPodAnnotatedIptablesFipQueue.Get()
if shutdown {
return false
}
err := func(obj interface{}) error {
defer c.delPodAnnotatedIptablesFipQueue.Done(obj)
var pod *v1.Pod
var ok bool
if pod, ok = obj.(*v1.Pod); !ok {
c.delPodAnnotatedIptablesFipQueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected pod in workqueue but got %#v", obj))
return nil
}
if err := c.handleDeletePodAnnotatedIptablesFip(pod); err != nil {
c.delPodAnnotatedIptablesFipQueue.AddRateLimited(obj)
return fmt.Errorf("error syncing '%s': %s, requeuing", pod.Name, err.Error())
}
c.delPodAnnotatedIptablesFipQueue.Forget(obj)
return nil
}(obj)
if err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
func (c *Controller) handleAddPodAnnotatedIptablesFip(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.FipNameAnnotation] != "" {
// fip aleady ok
return nil
}
fipName := PodNameToEipName(cachedPod.Name, cachedPod.Namespace)
if v, ok := cachedPod.Annotations[util.EipNameAnnotation]; ok {
v = strings.Trim(v, " ")
if v != "" {
fipName = v
}
}
if err = c.handleAddPodAnnotatedIptablesFipFinalizer(cachedPod); err != nil {
return err
}
if cachedPod.Annotations[util.AllocatedAnnotation] != "true" {
err = fmt.Errorf("pod network not allocated, failed to create iptables fip %s", fipName)
return err
}
if _, err = c.iptablesFipsLister.Get(fipName); err != nil {
if !k8serrors.IsNotFound(err) {
return err
}
klog.V(3).Infof("handle add pod annotated iptables fip %s", fipName)
if err := c.createOrUpdateCrdFip(fipName, fipName, cachedPod.Annotations[util.IpAddressAnnotation]); err != nil {
klog.Errorf("failed to create fip %s: %v", fipName, err)
return err
}
}
newPod := cachedPod.DeepCopy()
newPod.Annotations[util.FipNameAnnotation] = fipName
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
}
return nil
}
func (c *Controller) handleDeletePodAnnotatedIptablesFip(pod *v1.Pod) error {
var err error
var keepFipCR bool
klog.V(3).Infof("handle delete annotated iptables fip for pod %s/%s", pod.Namespace, pod.Name)
if ok, sts := isStatefulSetPod(pod); ok {
delete, err := appendCheckPodToDel(c, pod, sts, "StatefulSet")
keepFipCR = !isStatefulSetPodToDel(c.config.KubeClient, pod, sts) && !delete && err == nil
}
if !keepFipCR {
fipName := PodNameToEipName(pod.Name, pod.Namespace)
if v, ok := pod.Annotations[util.EipNameAnnotation]; ok {
v = strings.Trim(v, " ")
if v != "" {
fipName = v
}
}
klog.V(3).Infof("delete pod annotated iptables fip cr %s", fipName)
if err = c.config.KubeOvnClient.KubeovnV1().IptablesFIPRules().Delete(context.Background(), fipName, metav1.DeleteOptions{}); err != nil {
if !k8serrors.IsNotFound(err) {
klog.Errorf("failed to delete iptables fip %s: %v", fipName, err)
return err
}
}
}
if err = c.handleDelPodAnnotatedIptablesFipFinalizer(pod); err != nil {
return err
}
return nil
}
func (c *Controller) handleAddPodAnnotatedIptablesFipFinalizer(pod *v1.Pod) error {
if pod.DeletionTimestamp.IsZero() {
if util.ContainsString(pod.Finalizers, util.FipFinalizer) {
return nil
}
newPod := pod.DeepCopy()
controllerutil.AddFinalizer(newPod, util.ControllerName)
patch, err := util.GenerateMergePatchPayload(pod, newPod)
if err != nil {
klog.Errorf("failed to generate patch payload for pod '%s', %v", pod.Name, err)
return err
}
if _, err := c.config.KubeClient.CoreV1().Pods(pod.Namespace).Patch(context.Background(), pod.Name,
types.MergePatchType, patch, metav1.PatchOptions{}, ""); err != nil {
if k8serrors.IsNotFound(err) {
return nil
}
klog.Errorf("failed to add iptables eip finalizer for pod %s: %v", pod.Name, err)
return err
}
// wait local cache ready
time.Sleep(2 * time.Second)
}
return nil
}
func (c *Controller) handleDelPodAnnotatedIptablesFipFinalizer(pod *v1.Pod) error {
if len(pod.Finalizers) == 0 {
return nil
}
newPod := pod.DeepCopy()
controllerutil.RemoveFinalizer(newPod, util.ControllerName)
patch, err := util.GenerateMergePatchPayload(pod, newPod)
if err != nil {
klog.Errorf("failed to generate patch payload for pod '%s', %v", pod.Name, err)
return err
}
if _, err := c.config.KubeClient.CoreV1().Pods(pod.Namespace).Patch(context.Background(), pod.Name,
types.MergePatchType, patch, metav1.PatchOptions{}, ""); err != nil {
if k8serrors.IsNotFound(err) {
return nil
}
klog.Errorf("failed to add iptables eip finalizer for pod %s: %v", pod.Name, err)
return err
}
return nil
}