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controller.go
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controller.go
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/*
Copyright 2018 The CDI 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"
"os"
"strconv"
"time"
"kubevirt.io/containerized-data-importer/pkg/monitoring"
"kubevirt.io/containerized-data-importer/pkg/operator/resources/generate/install"
"github.com/kelseyhightower/envconfig"
conditionsv1 "github.com/openshift/custom-resource-status/conditions/v1"
"github.com/prometheus/client_golang/prometheus"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"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/controller/controllerutil"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/manager"
"sigs.k8s.io/controller-runtime/pkg/metrics"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
cdiv1 "kubevirt.io/containerized-data-importer-api/pkg/apis/core/v1beta1"
"kubevirt.io/containerized-data-importer/pkg/operator"
cdicerts "kubevirt.io/containerized-data-importer/pkg/operator/resources/cert"
cdicluster "kubevirt.io/containerized-data-importer/pkg/operator/resources/cluster"
cdinamespaced "kubevirt.io/containerized-data-importer/pkg/operator/resources/namespaced"
"kubevirt.io/containerized-data-importer/pkg/util"
"kubevirt.io/controller-lifecycle-operator-sdk/pkg/sdk/callbacks"
sdkr "kubevirt.io/controller-lifecycle-operator-sdk/pkg/sdk/reconciler"
)
const (
finalizerName = "operator.cdi.kubevirt.io"
createVersionLabel = "operator.cdi.kubevirt.io/createVersion"
updateVersionLabel = "operator.cdi.kubevirt.io/updateVersion"
// LastAppliedConfigAnnotation is the annotation that holds the last resource state which we put on resources under our governance
LastAppliedConfigAnnotation = "operator.cdi.kubevirt.io/lastAppliedConfiguration"
certPollInterval = 1 * time.Minute
createResourceFailed = "CreateResourceFailed"
createResourceSuccess = "CreateResourceSuccess"
deleteResourceFailed = "DeleteResourceFailed"
deleteResourceSuccess = "DeleteResourceSuccess"
dumpInstallStrategyKey = "DUMP_INSTALL_STRATEGY"
)
var (
log = logf.Log.WithName("cdi-operator")
readyGauge = prometheus.NewGauge(
prometheus.GaugeOpts{
Name: monitoring.MetricOptsList[monitoring.ReadyGauge].Name,
Help: monitoring.MetricOptsList[monitoring.ReadyGauge].Help,
})
)
func init() {
metrics.Registry = prometheus.NewRegistry()
metrics.Registry.MustRegister(readyGauge)
// 0 is our 'something bad is going on' value for alert to start firing, so can't default to that
readyGauge.Set(-1)
}
// Add creates a new CDI 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 {
r, err := newReconciler(mgr)
if err != nil {
return err
}
return r.add(mgr)
}
// newReconciler returns a new reconcile.Reconciler
func newReconciler(mgr manager.Manager) (*ReconcileCDI, error) {
var namespacedArgs cdinamespaced.FactoryArgs
namespace := util.GetNamespace()
restClient := mgr.GetClient()
clusterArgs := &cdicluster.FactoryArgs{
Namespace: namespace,
Client: restClient,
Logger: log,
}
dumpInstallStrategy := false
if value, ok := os.LookupEnv(dumpInstallStrategyKey); ok {
ret, err := strconv.ParseBool(value)
if err != nil {
return nil, err
}
dumpInstallStrategy = ret
log.Info("Dump Install Strategy", "VARS", ret)
}
err := envconfig.Process("", &namespacedArgs)
if err != nil {
return nil, err
}
namespacedArgs.Namespace = namespace
log.Info("", "VARS", fmt.Sprintf("%+v", namespacedArgs))
scheme := mgr.GetScheme()
uncachedClient, err := client.New(mgr.GetConfig(), client.Options{
Scheme: scheme,
Mapper: mgr.GetRESTMapper(),
})
if err != nil {
return nil, err
}
recorder := mgr.GetEventRecorderFor("operator-controller")
r := &ReconcileCDI{
client: restClient,
uncachedClient: uncachedClient,
scheme: scheme,
recorder: recorder,
namespace: namespace,
clusterArgs: clusterArgs,
namespacedArgs: &namespacedArgs,
dumpInstallStrategy: dumpInstallStrategy,
}
callbackDispatcher := callbacks.NewCallbackDispatcher(log, restClient, uncachedClient, scheme, namespace)
r.reconciler = sdkr.NewReconciler(r, log, restClient, callbackDispatcher, scheme, createVersionLabel, updateVersionLabel, LastAppliedConfigAnnotation, certPollInterval, finalizerName, false, recorder)
r.registerHooks()
addReconcileCallbacks(r)
return r, nil
}
var _ reconcile.Reconciler = &ReconcileCDI{}
// ReconcileCDI reconciles a CDI object
type ReconcileCDI 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
// use this for getting any resources not in the install namespace or cluster scope
uncachedClient client.Client
scheme *runtime.Scheme
recorder record.EventRecorder
controller controller.Controller
namespace string
clusterArgs *cdicluster.FactoryArgs
namespacedArgs *cdinamespaced.FactoryArgs
certManager CertManager
reconciler *sdkr.Reconciler
dumpInstallStrategy bool
}
// SetController sets the controller dependency
func (r *ReconcileCDI) SetController(controller controller.Controller) {
r.controller = controller
r.reconciler.WithController(controller)
}
// Reconcile reads that state of the cluster for a CDI object and makes changes based on the state read
// and what is in the CDI.Spec
// 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 *ReconcileCDI) Reconcile(_ context.Context, request reconcile.Request) (reconcile.Result, error) {
operatorVersion := r.namespacedArgs.OperatorVersion
reqLogger := log.WithValues("Request.Namespace", request.Namespace, "Request.Name", request.Name)
reqLogger.Info("Reconciling CDI")
cr := &cdiv1.CDI{}
crKey := client.ObjectKey{Namespace: "", Name: request.NamespacedName.Name}
err := r.client.Get(context.TODO(), crKey, cr)
if err != nil {
if errors.IsNotFound(err) {
reqLogger.Info("CDI CR does not exist")
return reconcile.Result{}, nil
}
reqLogger.Error(err, "Failed to get CDI object")
return reconcile.Result{}, err
}
if r.dumpInstallStrategy {
reqLogger.Info("Dumping Install Strategy")
objects, err := r.GetAllResources(cr)
if err != nil {
reqLogger.Error(err, "Failed to get all CDI object")
return reconcile.Result{}, err
}
var runtimeObjects []runtime.Object
for _, obj := range objects {
runtimeObjects = append(runtimeObjects, obj)
}
installerLabels := util.GetRecommendedInstallerLabelsFromCr(cr)
err = install.DumpInstallStrategyToConfigMap(r.client, runtimeObjects, reqLogger, r.namespace, installerLabels)
if err != nil {
reqLogger.Error(err, "Failed to dump CDI object in configmap")
return reconcile.Result{}, err
}
}
// Ready metric so we can alert whenever we are not ready for a while
if conditionsv1.IsStatusConditionTrue(cr.Status.Conditions, conditionsv1.ConditionAvailable) {
readyGauge.Set(1)
} else if !conditionsv1.IsStatusConditionTrue(cr.Status.Conditions, conditionsv1.ConditionProgressing) {
// Not an issue if progress is still ongoing
readyGauge.Set(0)
}
return r.reconciler.Reconcile(request, operatorVersion, reqLogger)
}
func (r *ReconcileCDI) add(mgr manager.Manager) error {
// Create a new controller
c, err := controller.New("cdi-operator-controller", mgr, controller.Options{Reconciler: r})
if err != nil {
return err
}
r.SetController(c)
if err = r.reconciler.WatchCR(); err != nil {
return err
}
cm, err := NewCertManager(mgr, r.namespace)
if err != nil {
return err
}
r.certManager = cm
return nil
}
func (r *ReconcileCDI) getCertificateDefinitions(cdi *cdiv1.CDI) []cdicerts.CertificateDefinition {
args := &cdicerts.FactoryArgs{Namespace: r.namespace}
if cdi != nil && cdi.Spec.CertConfig != nil {
if cdi.Spec.CertConfig.CA != nil {
if cdi.Spec.CertConfig.CA.Duration != nil {
args.SignerDuration = &cdi.Spec.CertConfig.CA.Duration.Duration
}
if cdi.Spec.CertConfig.CA.RenewBefore != nil {
args.SignerRenewBefore = &cdi.Spec.CertConfig.CA.RenewBefore.Duration
}
}
if cdi.Spec.CertConfig.Server != nil {
if cdi.Spec.CertConfig.Server.Duration != nil {
args.TargetDuration = &cdi.Spec.CertConfig.Server.Duration.Duration
}
if cdi.Spec.CertConfig.Server.RenewBefore != nil {
args.TargetRenewBefore = &cdi.Spec.CertConfig.Server.RenewBefore.Duration
}
}
}
return cdicerts.CreateCertificateDefinitions(args)
}
func (r *ReconcileCDI) getConfigMap() (*corev1.ConfigMap, error) {
cm := &corev1.ConfigMap{}
key := client.ObjectKey{Name: operator.ConfigMapName, Namespace: r.namespace}
if err := r.client.Get(context.TODO(), key, cm); err != nil {
if errors.IsNotFound(err) {
return nil, nil
}
return nil, err
}
return cm, nil
}
// createOperatorConfig creates operator config map
func (r *ReconcileCDI) createOperatorConfig(cr client.Object) error {
cdiCR := cr.(*cdiv1.CDI)
installerLabels := util.GetRecommendedInstallerLabelsFromCr(cdiCR)
cm := &corev1.ConfigMap{
ObjectMeta: metav1.ObjectMeta{
Name: operator.ConfigMapName,
Namespace: r.namespace,
Labels: map[string]string{"operator.cdi.kubevirt.io": ""},
},
}
util.SetRecommendedLabels(cm, installerLabels, "cdi-operator")
if err := controllerutil.SetControllerReference(cr, cm, r.scheme); err != nil {
return err
}
return r.client.Create(context.TODO(), cm)
}