/
resourceconsist_controller.go
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/
resourceconsist_controller.go
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/*
Copyright 2023 The KusionStack 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 controller
import (
"context"
"fmt"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/record"
"k8s.io/client-go/util/workqueue"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller"
"sigs.k8s.io/controller-runtime/pkg/handler"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
"kusionstack.io/kube-utils/multicluster"
"kusionstack.io/kube-utils/multicluster/clusterinfo"
)
// AddToMgr creates a new Controller of specified reconcileAdapter and adds it to the Manager with default RBAC.
// The Manager will set fields on the Controller and Start it when the Manager is Started.
func AddToMgr(mgr manager.Manager, adapter ReconcileAdapter) error {
r := NewReconcile(mgr, adapter)
// CreateEmployees a new controller
maxConcurrentReconciles := defaultMaxConcurrentReconciles
rateLimiter := workqueue.DefaultControllerRateLimiter()
if reconcileOptions, ok := adapter.(ReconcileOptions); ok {
maxConcurrentReconciles = reconcileOptions.GetMaxConcurrent()
rateLimiter = reconcileOptions.GetRateLimiter()
}
c, err := controller.New(adapter.GetControllerName(), mgr, controller.Options{
MaxConcurrentReconciles: maxConcurrentReconciles,
Reconciler: r,
RateLimiter: rateLimiter})
if err != nil {
return err
}
return watch(c, mgr, adapter)
}
func watch(c controller.Controller, mgr manager.Manager, adapter ReconcileAdapter) error {
var employer, employee client.Object
var employerEventHandler, employeeEventHandler handler.EventHandler
var employerPredicateFuncs, employeePredicateFuncs predicate.Funcs
var employerSource, employeeSource source.Source
if watchOptions, ok := adapter.(ReconcileWatchOptions); ok {
employer = watchOptions.NewEmployer()
employee = watchOptions.NewEmployee()
employerEventHandler = watchOptions.EmployerEventHandler()
employerPredicateFuncs = watchOptions.EmployerPredicates()
employeeEventHandler = watchOptions.EmployeeEventHandler()
employeePredicateFuncs = watchOptions.EmployeePredicates()
} else {
employer = &corev1.Service{}
employee = &corev1.Pod{}
employerEventHandler = &EnqueueServiceWithRateLimit{}
employerPredicateFuncs = employerPredicates
employeeEventHandler = &EnqueueServiceByPod{
c: mgr.GetClient(),
}
employeePredicateFuncs = employeePredicates
}
if multiClusterOptions, ok := adapter.(MultiClusterOptions); ok {
employerSource = multicluster.FedKind(&source.Kind{Type: employer})
employeeSource = multicluster.FedKind(&source.Kind{Type: employee})
if !multiClusterOptions.EmployeeFed() {
employeeSource = multicluster.ClustersKind(&source.Kind{Type: employee})
}
} else {
employerSource = &source.Kind{Type: employer}
employeeSource = &source.Kind{Type: employee}
}
err := c.Watch(employerSource, employerEventHandler, employerPredicateFuncs)
if err != nil {
return err
}
return c.Watch(employeeSource, employeeEventHandler, employeePredicateFuncs)
}
func NewReconcile(mgr manager.Manager, reconcileAdapter ReconcileAdapter) *Consist {
recorder := mgr.GetEventRecorderFor(reconcileAdapter.GetControllerName())
return &Consist{
Client: mgr.GetClient(),
scheme: mgr.GetScheme(),
adapter: reconcileAdapter,
logger: logf.Log.WithName(reconcileAdapter.GetControllerName()).V(4),
recorder: recorder,
}
}
type Consist struct {
client.Client
scheme *runtime.Scheme
logger logr.Logger
recorder record.EventRecorder
adapter ReconcileAdapter
}
func (r *Consist) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
var employer client.Object
var err error
if watchOptions, ok := r.adapter.(ReconcileWatchOptions); ok {
employer = watchOptions.NewEmployer()
} else {
employer = &corev1.Service{}
}
if _, ok := r.adapter.(MultiClusterOptions); ok {
err = r.Client.Get(clusterinfo.WithCluster(ctx, clusterinfo.Fed), types.NamespacedName{
Namespace: request.Namespace,
Name: request.Name,
}, employer)
} else {
err = r.Client.Get(ctx, types.NamespacedName{
Namespace: request.Namespace,
Name: request.Name,
}, employer)
}
if err != nil {
if errors.IsNotFound(err) {
return reconcile.Result{}, nil
}
r.logger.Error(err, fmt.Sprintf("get %s: %s/%s failed", employer.GetObjectKind().GroupVersionKind().Kind,
request.Namespace, request.Name))
return reconcile.Result{}, err
}
// ensure employer-clean finalizer firstly, employer-clean finalizer should be cleaned at the end
updated, err := r.ensureEmployerCleanFlz(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("add employer-clean finalizer for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "ensureEmployerCleanFlzFailed",
"add employer-clean finalizer failed: %s", err.Error())
return reconcile.Result{}, err
}
if updated {
r.logger.Info(fmt.Sprintf("add employer-clean finalizer for %s: %s/%s",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeNormal, "ensureEmployerCleanFlzSucceed",
"add employer-clean finalizer")
return reconcile.Result{}, nil
}
isExpectedClean, err := r.ensureExpectedFinalizer(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("ensure employees' expected finalizer failed for %s: %s/%s",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "ensureExpectedFinalizerFailed",
"ensure employees' expected finalizer failed: %s", err.Error())
return reconcile.Result{}, err
}
expectedEmployer, err := r.adapter.GetExpectedEmployer(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("get expected employer for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "GetExpectEmployerFailed",
"get expect employer failed: %s", err.Error())
return reconcile.Result{}, err
}
currentEmployer, err := r.adapter.GetCurrentEmployer(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("get current employer for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "GetCurrentEmployerFailed",
"get current employer failed: %s", err.Error())
return reconcile.Result{}, err
}
isCleanEmployer, syncEmployerFailedExist, cudEmployerResults, err := r.syncEmployer(ctx, employer, expectedEmployer, currentEmployer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("sync employer for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "syncEmployerFailed",
"sync employer failed: %s", err.Error())
return reconcile.Result{}, err
}
expectEmployees, err := r.adapter.GetExpectedEmployee(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("get expect employees for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "GetExpectEmployeeFailed",
"get expect employees failed: %s", err.Error())
return reconcile.Result{}, err
}
currentEmployees, err := r.adapter.GetCurrentEmployee(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("get current employees for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "GetCurrentEmployeeFailed",
"get current employees failed: %s", err.Error())
return reconcile.Result{}, err
}
isCleanEmployee, syncEmployeeFailedExist, cudEmployeeResults, err := r.syncEmployees(ctx, employer, expectEmployees, currentEmployees)
if err != nil {
r.logger.Error(err, fmt.Sprintf("sync employees for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "syncEmployeesFailed",
"sync employees failed: %s", err.Error())
return reconcile.Result{}, err
}
if isCleanEmployer && isCleanEmployee && isExpectedClean && !employer.GetDeletionTimestamp().IsZero() {
err = r.cleanEmployerCleanFinalizer(ctx, employer)
if err != nil {
r.logger.Error(err, fmt.Sprintf("clean employer clean-finalizer for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "cleanEmployerCleanFinalizerFailed",
"clean employer clean-finalizer failed: %s", err.Error())
return reconcile.Result{}, err
}
}
if syncEmployerFailedExist || syncEmployeeFailedExist {
r.recorder.Eventf(employer, corev1.EventTypeNormal, "ReconcileFailed", "employer or employees synced failed exist")
requeueOptions, requeueOptionsImplemented := r.adapter.(ReconcileRequeueOptions)
if requeueOptionsImplemented {
return reconcile.Result{RequeueAfter: requeueOptions.EmployeeSyncRequeueInterval()}, nil
}
return reconcile.Result{}, fmt.Errorf("employer or employees synced failed exist")
}
if recordOptions, ok := r.adapter.(StatusRecordOptions); ok {
err = recordOptions.RecordStatuses(ctx, employer, cudEmployerResults, cudEmployeeResults)
if err != nil {
r.logger.Error(err, fmt.Sprintf("record status for %s: %s/%s failed",
employer.GetObjectKind().GroupVersionKind().Kind, employer.GetNamespace(), employer.GetName()))
r.recorder.Eventf(employer, corev1.EventTypeWarning, "recordStatusesFailed",
"record status for employer failed: %s", err.Error())
return reconcile.Result{}, err
}
}
r.recorder.Eventf(employer, corev1.EventTypeNormal, "ReconcileSucceed", "")
return reconcile.Result{}, nil
}