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endpoint.go
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endpoint.go
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package controller
import (
"context"
"fmt"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/tools/cache"
"k8s.io/klog/v2"
kubeovnv1 "github.com/kubeovn/kube-ovn/pkg/apis/kubeovn/v1"
"github.com/kubeovn/kube-ovn/pkg/util"
)
func (c *Controller) enqueueAddEndpoint(obj interface{}) {
var (
key string
err error
)
if key, err = cache.MetaNamespaceKeyFunc(obj); err != nil {
utilruntime.HandleError(err)
return
}
klog.V(3).Infof("enqueue add endpoint %s", key)
c.updateEndpointQueue.Add(key)
}
func (c *Controller) enqueueUpdateEndpoint(oldObj, newObj interface{}) {
oldEp := oldObj.(*v1.Endpoints)
newEp := newObj.(*v1.Endpoints)
if oldEp.ResourceVersion == newEp.ResourceVersion {
return
}
if len(oldEp.Subsets) == 0 && len(newEp.Subsets) == 0 {
return
}
var (
key string
err error
)
if key, err = cache.MetaNamespaceKeyFunc(newObj); err != nil {
utilruntime.HandleError(err)
return
}
klog.V(3).Infof("enqueue update endpoint %s", key)
c.updateEndpointQueue.Add(key)
}
func (c *Controller) runUpdateEndpointWorker() {
for c.processNextUpdateEndpointWorkItem() {
}
}
func (c *Controller) processNextUpdateEndpointWorkItem() bool {
obj, shutdown := c.updateEndpointQueue.Get()
if shutdown {
return false
}
if err := func(obj interface{}) error {
defer c.updateEndpointQueue.Done(obj)
var (
key string
ok bool
err error
)
if key, ok = obj.(string); !ok {
c.updateEndpointQueue.Forget(obj)
utilruntime.HandleError(fmt.Errorf("expected string in workqueue but got %#v", obj))
return nil
}
if err = c.handleUpdateEndpoint(key); err != nil {
c.updateEndpointQueue.AddRateLimited(key)
return fmt.Errorf("error syncing '%s': %s, requeuing", key, err.Error())
}
c.updateEndpointQueue.Forget(obj)
return nil
}(obj); err != nil {
utilruntime.HandleError(err)
return true
}
return true
}
func (c *Controller) handleUpdateEndpoint(key string) error {
namespace, name, err := cache.SplitMetaNamespaceKey(key)
if err != nil {
utilruntime.HandleError(fmt.Errorf("invalid resource key: %s", key))
return nil
}
c.epKeyMutex.LockKey(key)
defer func() { _ = c.epKeyMutex.UnlockKey(key) }()
klog.Infof("update add/update endpoint %s/%s", namespace, name)
ep, err := c.endpointsLister.Endpoints(namespace).Get(name)
if err != nil {
if errors.IsNotFound(err) {
return nil
}
klog.Error(err)
return err
}
cachedService, err := c.servicesLister.Services(namespace).Get(name)
if err != nil {
if errors.IsNotFound(err) {
return nil
}
klog.Error(err)
return err
}
svc := cachedService.DeepCopy()
var (
pods []*v1.Pod
lbVips []string
vip, vpcName, subnetName string
ok bool
ignoreHealthCheck = true
)
if vip, ok = svc.Annotations[util.SwitchLBRuleVipsAnnotation]; ok {
lbVips = []string{vip}
for _, subset := range ep.Subsets {
for _, address := range subset.Addresses {
// TODO: IPv6
if util.CheckProtocol(vip) == kubeovnv1.ProtocolIPv4 &&
address.TargetRef.Name != "" {
ignoreHealthCheck = false
}
}
}
} else if lbVips = util.ServiceClusterIPs(*svc); len(lbVips) == 0 {
return nil
}
if pods, err = c.podsLister.Pods(namespace).List(labels.Set(svc.Spec.Selector).AsSelector()); err != nil {
klog.Errorf("failed to get pods for service %s in namespace %s: %v", name, namespace, err)
return err
}
vpcName, subnetName = c.getVpcSubnetName(pods, ep, svc)
var (
vpc *kubeovnv1.Vpc
svcVpc string
)
if vpc, err = c.vpcsLister.Get(vpcName); err != nil {
klog.Errorf("failed to get vpc %s of lb, %v", vpcName, err)
return err
}
if svcVpc = svc.Annotations[util.VpcAnnotation]; svcVpc != vpcName {
if svc.Annotations == nil {
svc.Annotations = make(map[string]string, 1)
}
svc.Annotations[util.VpcAnnotation] = vpcName
if _, err = c.config.KubeClient.CoreV1().Services(namespace).Update(context.Background(), svc, metav1.UpdateOptions{}); err != nil {
klog.Errorf("failed to update service %s/%s: %v", namespace, svc.Name, err)
return err
}
}
tcpLb, udpLb, sctpLb := vpc.Status.TCPLoadBalancer, vpc.Status.UDPLoadBalancer, vpc.Status.SctpLoadBalancer
oldTCPLb, oldUDPLb, oldSctpLb := vpc.Status.TCPSessionLoadBalancer, vpc.Status.UDPSessionLoadBalancer, vpc.Status.SctpSessionLoadBalancer
if svc.Spec.SessionAffinity == v1.ServiceAffinityClientIP {
tcpLb, udpLb, sctpLb, oldTCPLb, oldUDPLb, oldSctpLb = oldTCPLb, oldUDPLb, oldSctpLb, tcpLb, udpLb, sctpLb
}
for _, lbVip := range lbVips {
for _, port := range svc.Spec.Ports {
var lb, oldLb string
switch port.Protocol {
case v1.ProtocolTCP:
lb, oldLb = tcpLb, oldTCPLb
case v1.ProtocolUDP:
lb, oldLb = udpLb, oldUDPLb
case v1.ProtocolSCTP:
lb, oldLb = sctpLb, oldSctpLb
}
var (
vip, checkIP string
backends []string
ipPortMapping, externals map[string]string
)
vip = util.JoinHostPort(lbVip, port.Port)
if !ignoreHealthCheck {
if checkIP, err = c.getHealthCheckVip(vpcName, subnetName, lbVip); err != nil {
return err
}
externals = map[string]string{
util.SwitchLBRuleSubnet: subnetName,
}
}
ipPortMapping, backends = getIPPortMappingBackend(ep, pods, port, lbVip, checkIP, ignoreHealthCheck)
// for performance reason delete lb with no backends
if len(backends) != 0 {
klog.Infof("add vip endpoint %s, backends %v to LB %s", vip, backends, lb)
if err = c.OVNNbClient.LoadBalancerAddVip(lb, vip, backends...); err != nil {
klog.Errorf("failed to add vip %s with backends %s to LB %s: %v", lbVip, backends, lb, err)
return err
}
if !ignoreHealthCheck && len(ipPortMapping) != 0 {
klog.Infof("add health check ip port mapping %v to LB %s", ipPortMapping, lb)
if err = c.OVNNbClient.LoadBalancerAddHealthCheck(lb, vip, ignoreHealthCheck, ipPortMapping, externals); err != nil {
klog.Errorf("failed to add health check for vip %s with ip port mapping %s to LB %s: %v", lbVip, ipPortMapping, lb, err)
return err
}
}
} else {
klog.V(3).Infof("delete vip endpoint %s from LB %s", vip, lb)
if err = c.OVNNbClient.LoadBalancerDeleteVip(lb, vip, ignoreHealthCheck); err != nil {
klog.Errorf("failed to delete vip endpoint %s from LB %s: %v", vip, lb, err)
return err
}
klog.V(3).Infof("delete vip endpoint %s from old LB %s", vip, oldLb)
if err = c.OVNNbClient.LoadBalancerDeleteVip(oldLb, vip, ignoreHealthCheck); err != nil {
klog.Errorf("failed to delete vip %s from LB %s: %v", vip, oldLb, err)
return err
}
}
}
}
return nil
}
func (c *Controller) getVpcSubnetName(pods []*v1.Pod, endpoints *v1.Endpoints, service *v1.Service) (string, string) {
var (
vpcName string
subnetName string
)
for _, pod := range pods {
if len(pod.Annotations) == 0 {
continue
}
if subnetName == "" {
subnetName = pod.Annotations[util.LogicalSwitchAnnotation]
}
LOOP:
for _, subset := range endpoints.Subsets {
for _, addr := range subset.Addresses {
if addr.IP == pod.Status.PodIP {
if vpcName == "" {
vpcName = pod.Annotations[util.LogicalRouterAnnotation]
}
if vpcName != "" {
break LOOP
}
}
}
}
if vpcName != "" && subnetName != "" {
break
}
}
if vpcName == "" {
if vpcName = service.Annotations[util.VpcAnnotation]; vpcName == "" {
vpcName = c.config.ClusterRouter
}
}
if subnetName == "" {
subnetName = util.DefaultSubnet
}
return vpcName, subnetName
}
func (c *Controller) getHealthCheckVip(vpcName, subnetName, lbVip string) (string, error) {
var (
checkVip *kubeovnv1.Vip
checkIP string
err error
)
if checkVip, err = c.config.KubeOvnClient.KubeovnV1().Vips().Get(context.Background(), subnetName, metav1.GetOptions{}); err != nil {
if errors.IsNotFound(err) {
if checkVip, err = c.config.KubeOvnClient.
KubeovnV1().
Vips().
Create(context.Background(),
&kubeovnv1.Vip{
ObjectMeta: metav1.ObjectMeta{
Name: subnetName,
},
Spec: kubeovnv1.VipSpec{
Subnet: subnetName,
},
},
metav1.CreateOptions{},
); err != nil {
klog.Errorf("failed to create health check vip from vpc %s subnet %s, %v", vpcName, subnetName, err)
return checkIP, err
}
} else {
klog.Errorf("failed to get health check vip from vpc %s subnet %s, %v", vpcName, subnetName, err)
return checkIP, err
}
}
switch util.CheckProtocol(lbVip) {
case kubeovnv1.ProtocolIPv4:
checkIP = checkVip.Status.V4ip
case kubeovnv1.ProtocolIPv6:
checkIP = checkVip.Status.V6ip
}
if checkIP == "" {
err = fmt.Errorf("failed to get health check vip from vpc %s subnet %s", vpcName, subnetName)
klog.Error(err)
return checkIP, err
}
return checkIP, nil
}
func getIPPortMappingBackend(endpoints *v1.Endpoints, pods []*v1.Pod, servicePort v1.ServicePort, serviceIP, checkVip string, ignoreHealthCheck bool) (map[string]string, []string) {
var (
ipPortMapping = map[string]string{}
backends = []string{}
protocol = util.CheckProtocol(serviceIP)
)
for _, subset := range endpoints.Subsets {
var targetPort int32
for _, port := range subset.Ports {
if port.Name == servicePort.Name {
targetPort = port.Port
break
}
}
if targetPort == 0 {
continue
}
for _, address := range subset.Addresses {
if !ignoreHealthCheck && address.TargetRef.Name != "" {
ipName := fmt.Sprintf("%s.%s", address.TargetRef.Name, endpoints.Namespace)
ipPortMapping[address.IP] = fmt.Sprintf(util.HealthCheckNamedVipTemplate, ipName, checkVip)
}
if address.TargetRef == nil || address.TargetRef.Kind != "Pod" {
if util.CheckProtocol(address.IP) == protocol {
backends = append(backends, util.JoinHostPort(address.IP, targetPort))
}
continue
}
var ip string
for _, pod := range pods {
if pod.Name == address.TargetRef.Name {
podIPs := pod.Status.PodIPs
if len(podIPs) == 0 && pod.Status.PodIP != "" {
podIPs = []v1.PodIP{{IP: pod.Status.PodIP}}
}
for _, podIP := range podIPs {
if util.CheckProtocol(podIP.IP) == protocol {
ip = podIP.IP
break
}
}
break
}
}
if ip == "" && util.CheckProtocol(address.IP) == protocol {
ip = address.IP
}
if ip != "" {
backends = append(backends, util.JoinHostPort(ip, targetPort))
}
}
}
return ipPortMapping, backends
}