/
downstream.go
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/
downstream.go
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package controller
import (
"context"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/watch"
k8sinformers "k8s.io/client-go/informers"
"k8s.io/client-go/kubernetes"
clientgov1 "k8s.io/client-go/listers/core/v1"
"k8s.io/klog/v2"
beehiveContext "github.com/kubeedge/beehive/pkg/core/context"
"github.com/kubeedge/beehive/pkg/core/model"
"github.com/kubeedge/kubeedge/cloud/pkg/common/client"
"github.com/kubeedge/kubeedge/cloud/pkg/common/informers"
"github.com/kubeedge/kubeedge/cloud/pkg/common/messagelayer"
"github.com/kubeedge/kubeedge/cloud/pkg/common/modules"
"github.com/kubeedge/kubeedge/cloud/pkg/edgecontroller/constants"
"github.com/kubeedge/kubeedge/cloud/pkg/edgecontroller/manager"
commonconstants "github.com/kubeedge/kubeedge/common/constants"
"github.com/kubeedge/kubeedge/pkg/apis/componentconfig/cloudcore/v1alpha1"
routerv1 "github.com/kubeedge/kubeedge/pkg/apis/rules/v1"
crdinformers "github.com/kubeedge/kubeedge/pkg/client/informers/externalversions"
)
// DownstreamController watch kubernetes api server and send change to edge
type DownstreamController struct {
kubeClient kubernetes.Interface
messageLayer messagelayer.MessageLayer
podManager *manager.PodManager
configmapManager *manager.ConfigMapManager
secretManager *manager.SecretManager
nodeManager *manager.NodesManager
rulesManager *manager.RuleManager
ruleEndpointsManager *manager.RuleEndpointManager
lc *manager.LocationCache
podLister clientgov1.PodLister
}
func (dc *DownstreamController) syncPod() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncPod loop")
return
case e := <-dc.podManager.Events():
pod, ok := e.Object.(*v1.Pod)
if !ok {
klog.Warningf("object type: %T unsupported", e.Object)
continue
}
if !dc.lc.IsEdgeNode(pod.Spec.NodeName) {
continue
}
resource, err := messagelayer.BuildResource(pod.Spec.NodeName, pod.Namespace, model.ResourceTypePod, pod.Name)
if err != nil {
klog.Warningf("built message resource failed with error: %s", err)
continue
}
msg := model.NewMessage("").
SetResourceVersion(pod.ResourceVersion).
FillBody(pod)
switch e.Type {
case watch.Added:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.InsertOperation)
dc.lc.AddOrUpdatePod(*pod)
case watch.Deleted:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.DeleteOperation)
case watch.Modified:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.UpdateOperation)
dc.lc.AddOrUpdatePod(*pod)
default:
klog.Warningf("pod event type: %s unsupported", e.Type)
continue
}
if err := dc.messageLayer.Send(*msg); err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s", err, msg.GetOperation(), msg.GetResource())
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
}
}
}
func (dc *DownstreamController) syncConfigMap() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncConfigMap loop")
return
case e := <-dc.configmapManager.Events():
configMap, ok := e.Object.(*v1.ConfigMap)
if !ok {
klog.Warningf("object type: %T unsupported", e.Object)
continue
}
var operation string
switch e.Type {
case watch.Added:
operation = model.InsertOperation
case watch.Modified:
operation = model.UpdateOperation
case watch.Deleted:
operation = model.DeleteOperation
default:
// unsupported operation, no need to send to any node
klog.Warningf("config map event type: %s unsupported", e.Type)
continue // continue to next select
}
nodes := dc.lc.ConfigMapNodes(configMap.Namespace, configMap.Name)
if e.Type == watch.Deleted {
dc.lc.DeleteConfigMap(configMap.Namespace, configMap.Name)
}
klog.V(4).Infof("there are %d nodes need to sync config map, operation: %s", len(nodes), e.Type)
for _, n := range nodes {
resource, err := messagelayer.BuildResource(n, configMap.Namespace, model.ResourceTypeConfigmap, configMap.Name)
if err != nil {
klog.Warningf("build message resource failed with error: %s", err)
continue
}
msg := model.NewMessage("").
SetResourceVersion(configMap.ResourceVersion).
BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, operation).
FillBody(configMap)
err = dc.messageLayer.Send(*msg)
if err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s", err, msg.GetOperation(), msg.GetResource())
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
}
}
}
}
func (dc *DownstreamController) syncSecret() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncSecret loop")
return
case e := <-dc.secretManager.Events():
secret, ok := e.Object.(*v1.Secret)
if !ok {
klog.Warningf("object type: %T unsupported", e.Object)
continue
}
var operation string
switch e.Type {
case watch.Added:
// TODO: rollback when all edge upgrade to 2.1.6 or upper
fallthrough
case watch.Modified:
operation = model.UpdateOperation
case watch.Deleted:
operation = model.DeleteOperation
default:
// unsupported operation, no need to send to any node
klog.Warningf("secret event type: %s unsupported", e.Type)
continue // continue to next select
}
nodes := dc.lc.SecretNodes(secret.Namespace, secret.Name)
if e.Type == watch.Deleted {
dc.lc.DeleteSecret(secret.Namespace, secret.Name)
}
klog.V(4).Infof("there are %d nodes need to sync secret, operation: %s", len(nodes), e.Type)
for _, n := range nodes {
resource, err := messagelayer.BuildResource(n, secret.Namespace, model.ResourceTypeSecret, secret.Name)
if err != nil {
klog.Warningf("build message resource failed with error: %s", err)
continue
}
msg := model.NewMessage("").
SetResourceVersion(secret.ResourceVersion).
BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, operation).
FillBody(secret)
err = dc.messageLayer.Send(*msg)
if err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s", err, msg.GetOperation(), msg.GetResource())
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
}
}
}
}
func (dc *DownstreamController) syncEdgeNodes() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncEdgeNodes loop")
return
case e := <-dc.nodeManager.Events():
node, ok := e.Object.(*v1.Node)
if !ok {
klog.Warningf("Object type: %T unsupported", e.Object)
continue
}
switch e.Type {
case watch.Added:
fallthrough
case watch.Modified:
// update local cache
dc.lc.UpdateEdgeNode(node.ObjectMeta.Name)
case watch.Deleted:
dc.lc.DeleteNode(node.ObjectMeta.Name)
resource, err := messagelayer.BuildResource(node.Name, "namespace", constants.ResourceNode, node.Name)
if err != nil {
klog.Warningf("Built message resource failed with error: %s", err)
break
}
msg := model.NewMessage("").
BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.DeleteOperation)
err = dc.messageLayer.Send(*msg)
if err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s", err, msg.GetOperation(), msg.GetResource())
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
default:
// unsupported operation, no need to send to any node
klog.Warningf("Node event type: %s unsupported", e.Type)
}
}
}
}
func (dc *DownstreamController) syncRule() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncRule loop")
return
case e := <-dc.rulesManager.Events():
klog.V(4).Infof("Get rule events: event type: %s.", e.Type)
rule, ok := e.Object.(*routerv1.Rule)
if !ok {
klog.Warningf("object type: %T unsupported", e.Object)
continue
}
klog.V(4).Infof("Get rule events: rule object: %+v.", rule)
resource, err := messagelayer.BuildResourceForRouter(model.ResourceTypeRule, rule.Name)
if err != nil {
klog.Warningf("built message resource failed with error: %s", err)
continue
}
msg := model.NewMessage("").
SetResourceVersion(rule.ResourceVersion).
FillBody(rule)
switch e.Type {
case watch.Added:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.InsertOperation)
case watch.Deleted:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.DeleteOperation)
case watch.Modified:
klog.Warningf("rule event type: %s unsupported", e.Type)
continue
default:
klog.Warningf("rule event type: %s unsupported", e.Type)
continue
}
if err := dc.messageLayer.Send(*msg); err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s. Reason: %v", err, msg.GetOperation(), msg.GetResource(), err)
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
}
}
}
func (dc *DownstreamController) syncRuleEndpoint() {
for {
select {
case <-beehiveContext.Done():
klog.Warning("Stop edgecontroller downstream syncRuleEndpoint loop")
return
case e := <-dc.ruleEndpointsManager.Events():
klog.V(4).Infof("Get ruleEndpoint events: event type: %s.", e.Type)
ruleEndpoint, ok := e.Object.(*routerv1.RuleEndpoint)
if !ok {
klog.Warningf("object type: %T unsupported", e.Object)
continue
}
klog.V(4).Infof("Get ruleEndpoint events: ruleEndpoint object: %+v.", ruleEndpoint)
resource, err := messagelayer.BuildResourceForRouter(model.ResourceTypeRuleEndpoint, ruleEndpoint.Name)
if err != nil {
klog.Warningf("built message resource failed with error: %s", err)
continue
}
msg := model.NewMessage("").
SetResourceVersion(ruleEndpoint.ResourceVersion).
FillBody(ruleEndpoint)
switch e.Type {
case watch.Added:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.InsertOperation)
case watch.Deleted:
msg.BuildRouter(modules.EdgeControllerModuleName, constants.GroupResource, resource, model.DeleteOperation)
case watch.Modified:
klog.Warningf("ruleEndpoint event type: %s unsupported", e.Type)
continue
default:
klog.Warningf("ruleEndpoint event type: %s unsupported", e.Type)
continue
}
if err := dc.messageLayer.Send(*msg); err != nil {
klog.Warningf("send message failed with error: %s, operation: %s, resource: %s", err, msg.GetOperation(), msg.GetResource())
} else {
klog.V(4).Infof("send message successfully, operation: %s, resource: %s", msg.GetOperation(), msg.GetResource())
}
}
}
}
// Start DownstreamController
func (dc *DownstreamController) Start() error {
klog.Info("start downstream controller")
// pod
go dc.syncPod()
// configmap
go dc.syncConfigMap()
// secret
go dc.syncSecret()
// nodes
go dc.syncEdgeNodes()
// rule
go dc.syncRule()
// ruleendpoint
go dc.syncRuleEndpoint()
return nil
}
// initLocating to know configmap and secret should send to which nodes
func (dc *DownstreamController) initLocating() error {
set := labels.Set{commonconstants.EdgeNodeRoleKey: commonconstants.EdgeNodeRoleValue}
selector := labels.SelectorFromSet(set)
nodes, err := dc.kubeClient.CoreV1().Nodes().List(context.Background(), metav1.ListOptions{LabelSelector: selector.String()})
if err != nil {
return err
}
for _, node := range nodes.Items {
dc.lc.UpdateEdgeNode(node.ObjectMeta.Name)
}
pods, err := dc.kubeClient.CoreV1().Pods(v1.NamespaceAll).List(context.Background(), metav1.ListOptions{})
if err != nil {
return err
}
for _, p := range pods.Items {
if dc.lc.IsEdgeNode(p.Spec.NodeName) {
dc.lc.AddOrUpdatePod(p)
}
}
return nil
}
// NewDownstreamController create a DownstreamController from config
func NewDownstreamController(config *v1alpha1.EdgeController, k8sInformerFactory k8sinformers.SharedInformerFactory, keInformerFactory informers.KubeEdgeCustomInformer,
crdInformerFactory crdinformers.SharedInformerFactory) (*DownstreamController, error) {
lc := &manager.LocationCache{}
podInformer := k8sInformerFactory.Core().V1().Pods()
podManager, err := manager.NewPodManager(config, podInformer.Informer())
if err != nil {
klog.Warningf("create pod manager failed with error: %s", err)
return nil, err
}
configMapInformer := k8sInformerFactory.Core().V1().ConfigMaps()
configMapManager, err := manager.NewConfigMapManager(config, configMapInformer.Informer())
if err != nil {
klog.Warningf("create configmap manager failed with error: %s", err)
return nil, err
}
secretInformer := k8sInformerFactory.Core().V1().Secrets()
secretManager, err := manager.NewSecretManager(config, secretInformer.Informer())
if err != nil {
klog.Warningf("create secret manager failed with error: %s", err)
return nil, err
}
nodeInformer := keInformerFactory.EdgeNode()
nodesManager, err := manager.NewNodesManager(nodeInformer)
if err != nil {
klog.Warningf("Create nodes manager failed with error: %s", err)
return nil, err
}
rulesInformer := crdInformerFactory.Rules().V1().Rules().Informer()
rulesManager, err := manager.NewRuleManager(config, rulesInformer)
if err != nil {
klog.Warningf("Create rulesManager failed with error: %s", err)
return nil, err
}
ruleEndpointsInformer := crdInformerFactory.Rules().V1().RuleEndpoints().Informer()
ruleEndpointsManager, err := manager.NewRuleEndpointManager(config, ruleEndpointsInformer)
if err != nil {
klog.Warningf("Create ruleEndpointsManager failed with error: %s", err)
return nil, err
}
dc := &DownstreamController{
kubeClient: client.GetKubeClient(),
podManager: podManager,
configmapManager: configMapManager,
secretManager: secretManager,
nodeManager: nodesManager,
messageLayer: messagelayer.EdgeControllerMessageLayer(),
lc: lc,
podLister: podInformer.Lister(),
rulesManager: rulesManager,
ruleEndpointsManager: ruleEndpointsManager,
}
if err := dc.initLocating(); err != nil {
return nil, err
}
return dc, nil
}