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controller.go
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controller.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package app
import (
"fmt"
"net/http"
"time"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apiserver/pkg/server/mux"
"k8s.io/client-go/tools/cache"
"tkestack.io/tke/pkg/util/log"
)
const (
// ControllerStartJitter used when starting controller managers.
ControllerStartJitter = 1.0
)
// ControllersDisabledByDefault configured all controllers that are turned off
// by default.
var ControllersDisabledByDefault = sets.NewString()
// KnownControllers returns the known controllers.
func KnownControllers() []string {
ret := sets.StringKeySet(NewControllerInitializers())
return ret.List()
}
// NewControllerInitializers is a public map of named controller groups (you can start more than one in an init func)
// paired to their InitFunc. This allows for structured downstream composition and subdivision.
func NewControllerInitializers() map[string]InitFunc {
controllers := map[string]InitFunc{}
controllers["policy"] = startPolicyController
controllers["projectpolicy"] = startProjectPolicyController
controllers["custompolicy"] = startCustomPolicyController
controllers["localidentity"] = startLocalIdentityController
controllers["groups"] = startGroupController
controllers["roles"] = startRoleController
controllers["configs"] = startConfigController
return controllers
}
// StartControllers to start the controller.
func StartControllers(ctx ControllerContext, controllers map[string]InitFunc, unsecuredMux *mux.PathRecorderMux) error {
go ctx.InformerFactory.Auth().V1().Rules().Informer().Run(ctx.Stop)
if ok := cache.WaitForCacheSync(ctx.Stop, ctx.InformerFactory.Auth().V1().Rules().Informer().HasSynced); !ok {
return fmt.Errorf("failed to wait for rules caches to sync")
}
_ = ctx.Enforcer.LoadPolicy()
for controllerName, initFn := range controllers {
if !ctx.IsControllerEnabled(controllerName) {
log.Warnf("%q is disabled", controllerName)
continue
}
time.Sleep(wait.Jitter(ctx.ControllerStartInterval, ControllerStartJitter))
log.Infof("Starting %q", controllerName)
debugHandler, started, err := initFn(ctx)
if err != nil {
log.Errorf("Error starting %q", controllerName)
return err
}
if !started {
log.Warnf("Skipping %q", controllerName)
continue
}
if debugHandler != nil && unsecuredMux != nil {
basePath := "/debug/controllers/" + controllerName
unsecuredMux.UnlistedHandle(basePath, http.StripPrefix(basePath, debugHandler))
unsecuredMux.UnlistedHandlePrefix(basePath+"/", http.StripPrefix(basePath, debugHandler))
}
log.Infof("Started %q", controllerName)
}
return nil
}