/
commonaudit_controller.go
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/
commonaudit_controller.go
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//
// Copyright 2020 IBM Corporation
//
// 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 commonaudit
import (
"context"
"reflect"
"sort"
"time"
operatorv1 "github.com/ibm/ibm-auditlogging-operator/pkg/apis/operator/v1"
operatorv1alpha1 "github.com/ibm/ibm-auditlogging-operator/pkg/apis/operator/v1alpha1"
res "github.com/ibm/ibm-auditlogging-operator/pkg/resources"
opversion "github.com/ibm/ibm-auditlogging-operator/version"
certmgr "github.com/jetstack/cert-manager/pkg/apis/certmanager/v1alpha1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/client-go/tools/record"
"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/reconcile"
"sigs.k8s.io/controller-runtime/pkg/source"
)
var log = logf.Log.WithName("controller_commonaudit")
/**
* USER ACTION REQUIRED: This is a scaffold file intended for the user to modify with their own Controller
* business logic. Delete these comments after modifying this file.*
*/
// Add creates a new CommonAudit Controller and adds it to the Manager. The Manager will set fields on the Controller
// and Start it when the Manager is Started.
func Add(mgr manager.Manager) error {
return add(mgr, newReconciler(mgr))
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) reconcile.Reconciler {
return &ReconcileCommonAudit{
client: mgr.GetClient(),
scheme: mgr.GetScheme(),
recorder: mgr.GetEventRecorderFor("ibm-auditlogging-operator"),
}
}
// add adds a new Controller to mgr with r as the reconcile.Reconciler
func add(mgr manager.Manager, r reconcile.Reconciler) error {
// Create a new controller
c, err := controller.New("commonaudit-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
// Watch for changes to primary resource CommonAudit
err = c.Watch(&source.Kind{Type: &operatorv1.CommonAudit{}}, &handler.EnqueueRequestForObject{})
if err != nil {
return err
}
// TODO(user): Modify this to be the types you create that are owned by the primary resource
// Watch for changes to secondary resource Pods and requeue the owner CommonAudit
secondaryResourceTypes := []runtime.Object{
&appsv1.Deployment{},
&corev1.ConfigMap{},
&certmgr.Certificate{},
&corev1.Secret{},
&corev1.ServiceAccount{},
&rbacv1.Role{},
&rbacv1.RoleBinding{},
&corev1.Service{},
}
for _, restype := range secondaryResourceTypes {
log.Info("Watching", "restype", reflect.TypeOf(restype))
//err = c.Watch(&kind, &handler.EnqueueRequestForOwner{
err = c.Watch(&source.Kind{Type: restype}, &handler.EnqueueRequestForOwner{
IsController: true,
OwnerType: &operatorv1.CommonAudit{},
})
if err != nil {
return err
}
}
return nil
}
// blank assignment to verify that ReconcileCommonAudit implements reconcile.Reconciler
var _ reconcile.Reconciler = &ReconcileCommonAudit{}
// ReconcileCommonAudit reconciles a CommonAudit object
type ReconcileCommonAudit struct {
// This client, initialized using mgr.Client() above, is a split client
// that reads objects from the cache and writes to the apiserver
client client.Client
scheme *runtime.Scheme
recorder record.EventRecorder
}
// Reconcile reads that state of the cluster for a CommonAudit object and makes changes based on the state read
// and what is in the CommonAudit.Spec
// TODO(user): Modify this Reconcile function to implement your Controller logic. This example creates
// a Pod as an example
// Note:
// The Controller will requeue the Request to be processed again if the returned error is non-nil or
// Result.Requeue is true, otherwise upon completion it will remove the work from the queue.
func (r *ReconcileCommonAudit) Reconcile(request reconcile.Request) (reconcile.Result, error) {
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling CommonAudit")
// Fetch the CommonAudit instance
instance := &operatorv1.CommonAudit{}
err := r.client.Get(context.TODO(), request.NamespacedName, instance)
if err != nil {
if errors.IsNotFound(err) {
// Request object not found, could have been deleted after reconcile request.
// Owned objects are automatically garbage collected. For additional cleanup logic use finalizers.
// Return and don't requeue
return reconcile.Result{}, nil
}
// Error reading the object - requeue the request.
return reconcile.Result{}, err
}
// Set a default Status value
if len(instance.Status.Nodes) == 0 {
instance.Status.Nodes = res.DefaultStatusForCR
instance.Status.Versions.Reconciled = opversion.Version
err = r.client.Status().Update(context.TODO(), instance)
if err != nil {
reqLogger.Error(err, "Failed to set AuditLogging default status")
return reconcile.Result{}, err
}
}
auditLoggingList := &operatorv1alpha1.AuditLoggingList{}
if err := r.client.List(context.TODO(), auditLoggingList); err == nil &&
len(auditLoggingList.Items) > 0 && request.Namespace == res.InstanceNamespace {
msg := "CommonAudit cannot run alongside AuditLogging in the same namespace. Delete one or the other to proceed."
reqLogger.Info(msg)
r.updateEvent(instance, msg, corev1.EventTypeWarning, "Not Allowed")
// Return and don't requeue
return reconcile.Result{}, nil
}
commonAuditList := &operatorv1.CommonAuditList{}
if err := r.client.List(context.TODO(), commonAuditList, client.InNamespace(request.Namespace)); err == nil &&
len(commonAuditList.Items) > 1 {
msg := "Only one instance of CommonAudit per namespace. Delete other instances to proceed."
reqLogger.Info(msg)
r.updateEvent(instance, msg, corev1.EventTypeWarning, "Not Allowed")
// Return and don't requeue
return reconcile.Result{}, nil
}
r.updateEvent(instance, "Instance found", corev1.EventTypeNormal, "Initializing")
var recResult reconcile.Result
var recErr error
reconcilers := []func(*operatorv1.CommonAudit) (reconcile.Result, error){
r.reconcileAuditConfigMaps,
r.reconcileAuditCerts,
r.reconcileSecret,
r.reconcileServiceAccount,
r.reconcileRole,
r.reconcileRoleBinding,
r.reconcileService,
r.reconcileFluentdDeployment,
r.updateStatus,
}
for _, rec := range reconcilers {
recResult, recErr = rec(instance)
if recErr != nil || recResult.Requeue {
return recResult, recErr
}
}
r.updateEvent(instance, "Deployed "+res.AuditLoggingComponentName+" successfully", corev1.EventTypeNormal, "Deployed")
reqLogger.Info("Reconciliation successful!", "Name", instance.Name)
// since we updated the status in the Audit Logging CR, sleep 5 seconds to allow the CR to be refreshed.
time.Sleep(5 * time.Second)
return reconcile.Result{}, nil
}
func (r *ReconcileCommonAudit) updateStatus(instance *operatorv1.CommonAudit) (reconcile.Result, error) {
reqLogger := log.WithValues("Namespace", instance.Namespace, "Name", instance.Name)
podList := &corev1.PodList{}
listOpts := []client.ListOption{
client.InNamespace(instance.Namespace),
client.MatchingLabels(res.LabelsForSelector(res.FluentdName, instance.Name)),
}
if err := r.client.List(context.TODO(), podList, listOpts...); err != nil {
reqLogger.Error(err, "Failed to list pods", "AuditLogging.Namespace", instance.Namespace, "AuditLogging.Name", instance.Name)
return reconcile.Result{}, err
}
var podNames []string
for _, pod := range podList.Items {
podNames = append(podNames, pod.Name)
}
// if no pods were found set the default status
if len(podNames) == 0 {
podNames = res.DefaultStatusForCR
} else {
sort.Strings(podNames)
}
// Update status.Nodes if needed
if !reflect.DeepEqual(podNames, instance.Status.Nodes) || opversion.Version != instance.Status.Versions.Reconciled {
instance.Status.Nodes = podNames
instance.Status.Versions.Reconciled = opversion.Version
reqLogger.Info("Updating Audit Logging status", "Name", instance.Name)
err := r.client.Status().Update(context.TODO(), instance)
if err != nil {
return reconcile.Result{}, err
}
}
return reconcile.Result{}, nil
}
func (r *ReconcileCommonAudit) updateEvent(instance *operatorv1.CommonAudit, message, event, reason string) {
r.recorder.Event(instance, event, reason, message)
}