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198 changes: 198 additions & 0 deletions
198
internal/controller/healthcheck/healthcheck_controller.go
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/* | ||
Copyright 2023 The Kubernetes 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. | ||
*/ | ||
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package healthcheck | ||
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import ( | ||
"context" | ||
"fmt" | ||
"time" | ||
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appsv1 "k8s.io/api/apps/v1" | ||
corev1 "k8s.io/api/core/v1" | ||
"k8s.io/apimachinery/pkg/runtime" | ||
"k8s.io/apimachinery/pkg/types" | ||
operatorv1 "sigs.k8s.io/cluster-api-operator/api/v1alpha2" | ||
"sigs.k8s.io/cluster-api-operator/internal/controller/genericprovider" | ||
clusterv1 "sigs.k8s.io/cluster-api/api/v1beta1" | ||
"sigs.k8s.io/cluster-api/util/conditions" | ||
"sigs.k8s.io/cluster-api/util/patch" | ||
ctrl "sigs.k8s.io/controller-runtime" | ||
"sigs.k8s.io/controller-runtime/pkg/builder" | ||
"sigs.k8s.io/controller-runtime/pkg/client" | ||
"sigs.k8s.io/controller-runtime/pkg/controller" | ||
"sigs.k8s.io/controller-runtime/pkg/event" | ||
"sigs.k8s.io/controller-runtime/pkg/predicate" | ||
"sigs.k8s.io/controller-runtime/pkg/reconcile" | ||
) | ||
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type ProviderHealthCheckReconciler struct { | ||
Client client.Client | ||
} | ||
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const ( | ||
providerLabelKey = "cluster.x-k8s.io/provider" | ||
) | ||
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func (r *ProviderHealthCheckReconciler) SetupWithManager(mgr ctrl.Manager, options controller.Options) error { | ||
return ctrl.NewControllerManagedBy(mgr). | ||
For(&appsv1.Deployment{}, builder.WithPredicates(providerDeploymentPredicates())). | ||
WithOptions(options). | ||
Complete(r) | ||
} | ||
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func (r *ProviderHealthCheckReconciler) Reconcile(ctx context.Context, req reconcile.Request) (_ reconcile.Result, reterr error) { | ||
log := ctrl.LoggerFrom(ctx) | ||
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log.Info("Checking provider health") | ||
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result := ctrl.Result{} | ||
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deployment := &appsv1.Deployment{} | ||
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if err := r.Client.Get(ctx, req.NamespacedName, deployment); err != nil { | ||
// Error reading the object - requeue the request. | ||
return result, err | ||
} | ||
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// There should be just one owner reference - to a Provider resource. | ||
if len(deployment.GetOwnerReferences()) != 1 { | ||
return result, fmt.Errorf("incorrect number of owner references for provider deployment %s", req.NamespacedName) | ||
} | ||
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deploymentOwner := deployment.GetOwnerReferences()[0] | ||
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deploymentAvailableCondition := getDeploymentCondition(deployment.Status, appsv1.DeploymentAvailable) | ||
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typedProvider, err := r.getGenericProvider(ctx, deploymentOwner.Kind, deploymentOwner.Name, req.Namespace) | ||
if err != nil { | ||
return result, err | ||
} | ||
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// Stop earlier if this provider is not fully installed yet. | ||
if !conditions.IsTrue(typedProvider, operatorv1.ProviderInstalledCondition) { | ||
return ctrl.Result{RequeueAfter: 5 * time.Second}, nil | ||
} | ||
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// Compare provider's Ready condition with the deployment's Available condition and stop if they already match. | ||
currentReadyCondition := conditions.Get(typedProvider, clusterv1.ReadyCondition) | ||
if currentReadyCondition != nil && deploymentAvailableCondition != nil && currentReadyCondition.Status == deploymentAvailableCondition.Status { | ||
return result, nil | ||
} | ||
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// Initialize the patch helper | ||
patchHelper, err := patch.NewHelper(typedProvider.GetObject(), r.Client) | ||
if err != nil { | ||
return result, err | ||
} | ||
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if deploymentAvailableCondition != nil { | ||
conditions.Set(typedProvider, &clusterv1.Condition{ | ||
Type: clusterv1.ReadyCondition, | ||
Status: deploymentAvailableCondition.Status, | ||
Reason: deploymentAvailableCondition.Reason, | ||
}) | ||
} else { | ||
conditions.Set(typedProvider, &clusterv1.Condition{ | ||
Type: clusterv1.ReadyCondition, | ||
Status: corev1.ConditionFalse, | ||
Reason: operatorv1.NoDeploymentAvailableConditionReason, | ||
}) | ||
} | ||
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// Don't requeue immediately if the deployment is not ready, but rather wait 5 seconds. | ||
if conditions.IsFalse(typedProvider, clusterv1.ReadyCondition) { | ||
result = ctrl.Result{RequeueAfter: 5 * time.Second} | ||
} | ||
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options := patch.WithOwnedConditions{Conditions: []clusterv1.ConditionType{clusterv1.ReadyCondition}} | ||
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return result, patchHelper.Patch(ctx, typedProvider.GetObject(), options) | ||
} | ||
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func (r *ProviderHealthCheckReconciler) getGenericProvider(ctx context.Context, providerKind, providerName, providerNamespace string) (genericprovider.GenericProvider, error) { | ||
switch providerKind { | ||
case "CoreProvider": | ||
provider := &operatorv1.CoreProvider{} | ||
if err := r.Client.Get(ctx, types.NamespacedName{Name: providerName, Namespace: providerNamespace}, provider); err != nil { | ||
return nil, err | ||
} | ||
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return &genericprovider.CoreProviderWrapper{CoreProvider: provider}, nil | ||
case "BootstrapProvider": | ||
provider := &operatorv1.BootstrapProvider{} | ||
if err := r.Client.Get(ctx, types.NamespacedName{Name: providerName, Namespace: providerNamespace}, provider); err != nil { | ||
return nil, err | ||
} | ||
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return &genericprovider.BootstrapProviderWrapper{BootstrapProvider: provider}, nil | ||
case "ControlPlaneProvider": | ||
provider := &operatorv1.ControlPlaneProvider{} | ||
if err := r.Client.Get(ctx, types.NamespacedName{Name: providerName, Namespace: providerNamespace}, provider); err != nil { | ||
return nil, err | ||
} | ||
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return &genericprovider.ControlPlaneProviderWrapper{ControlPlaneProvider: provider}, nil | ||
case "InfrastructureProvider": | ||
provider := &operatorv1.InfrastructureProvider{} | ||
if err := r.Client.Get(ctx, types.NamespacedName{Name: providerName, Namespace: providerNamespace}, provider); err != nil { | ||
return nil, err | ||
} | ||
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return &genericprovider.InfrastructureProviderWrapper{InfrastructureProvider: provider}, nil | ||
case "AddonProvider": | ||
provider := &operatorv1.AddonProvider{} | ||
if err := r.Client.Get(ctx, types.NamespacedName{Name: providerName, Namespace: providerNamespace}, provider); err != nil { | ||
return nil, err | ||
} | ||
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return &genericprovider.AddonProviderWrapper{AddonProvider: provider}, nil | ||
default: | ||
return nil, fmt.Errorf("failed to cast interface for type: %s", providerKind) | ||
} | ||
} | ||
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// getDeploymentCondition returns the deployment condition with the provided type. | ||
func getDeploymentCondition(status appsv1.DeploymentStatus, condType appsv1.DeploymentConditionType) *appsv1.DeploymentCondition { | ||
for i := range status.Conditions { | ||
c := status.Conditions[i] | ||
if c.Type == condType { | ||
return &c | ||
} | ||
} | ||
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return nil | ||
} | ||
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func providerDeploymentPredicates() predicate.Funcs { | ||
isProviderDeployment := func(obj runtime.Object) bool { | ||
clusterOperator, ok := obj.(*appsv1.Deployment) | ||
if !ok { | ||
panic("expected to get an of object of type appsv1.Deployment") | ||
} | ||
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_, found := clusterOperator.GetLabels()[providerLabelKey] | ||
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return found | ||
} | ||
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return predicate.Funcs{ | ||
CreateFunc: func(e event.CreateEvent) bool { return false }, | ||
UpdateFunc: func(e event.UpdateEvent) bool { return isProviderDeployment(e.ObjectNew) }, | ||
GenericFunc: func(e event.GenericEvent) bool { return false }, | ||
DeleteFunc: func(e event.DeleteEvent) bool { return false }, | ||
} | ||
} |
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