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/*
Copyright 2021 The KubeEdge Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package dynamiccontroller
import (
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/dynamic/dynamicinformer"
"k8s.io/klog/v2"
configv1alpha1 "github.com/kubeedge/api/apis/componentconfig/cloudcore/v1alpha1"
"github.com/kubeedge/beehive/pkg/core"
beehiveContext "github.com/kubeedge/beehive/pkg/core/context"
"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/dynamiccontroller/application"
"github.com/kubeedge/kubeedge/cloud/pkg/dynamiccontroller/config"
"github.com/kubeedge/kubeedge/cloud/pkg/dynamiccontroller/filter/defaultmaster"
"github.com/kubeedge/kubeedge/cloud/pkg/dynamiccontroller/filter/endpointresource"
)
// DynamicController use dynamicSharedInformer to dispatch messages
type DynamicController struct {
enable bool
messageLayer messagelayer.MessageLayer
dynamicSharedInformerFactory dynamicinformer.DynamicSharedInformerFactory
applicationCenter *application.Center
}
var (
_ core.Module = (*DynamicController)(nil)
dynamicController *DynamicController
)
func Register(dc *configv1alpha1.DynamicController, enableAuthorization bool) {
config.InitConfigure(dc, enableAuthorization)
dynamicController = newDynamicController(dc.Enable)
core.Register(dynamicController)
}
// Name of controller
func (dctl *DynamicController) Name() string {
return modules.DynamicControllerModuleName
}
// Group of controller
func (dctl *DynamicController) Group() string {
return modules.DynamicControllerModuleGroup
}
// Enable of controller
func (dctl *DynamicController) Enable() bool {
return dctl.enable
}
// Start controller
func (dctl *DynamicController) Start() {
endpointresource.Register()
defaultmaster.Register()
dctl.dynamicSharedInformerFactory.Start(beehiveContext.Done())
for gvr, cacheSync := range dctl.dynamicSharedInformerFactory.WaitForCacheSync(beehiveContext.Done()) {
if !cacheSync {
klog.Exitf("Unable to sync caches for: %s", gvr.String())
}
}
go dctl.receiveMessage()
}
func newDynamicController(enable bool) *DynamicController {
var dctl = &DynamicController{
enable: enable,
messageLayer: messagelayer.DynamicControllerMessageLayer(),
dynamicSharedInformerFactory: informers.GetInformersManager().GetDynamicInformerFactory(),
}
dctl.applicationCenter = application.NewApplicationCenter(dctl.dynamicSharedInformerFactory)
dctl.applicationCenter.ForResource(v1.SchemeGroupVersion.WithResource("nodes"))
dctl.applicationCenter.ForResource(v1.SchemeGroupVersion.WithResource("services"))
return dctl
}
func (dctl *DynamicController) receiveMessage() {
for {
select {
case <-beehiveContext.Done():
klog.Info("Stop dispatchMessage")
return
default:
}
msg, err := dctl.messageLayer.Receive()
if err != nil {
klog.Warningf("Receive message failed, %s", err)
continue
}
klog.V(4).Infof("[DynamicController] receive, msg: %+v", msg)
dctl.applicationCenter.Process(msg)
}
}
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