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Merge pull request k0rdent#407 from eromanova/template-chain-controller
Template chain controller
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,222 @@ | ||
| // Copyright 2024 | ||
| // | ||
| // 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" | ||
| "errors" | ||
| "fmt" | ||
|
|
||
| helmcontrollerv2 "github.com/fluxcd/helm-controller/api/v2" | ||
| sourcev1 "github.com/fluxcd/source-controller/api/v1" | ||
| apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/log" | ||
|
|
||
| hmc "github.com/Mirantis/hmc/api/v1alpha1" | ||
| ) | ||
|
|
||
| const HMCManagedByChainLabelKey = "hmc.mirantis.com/managed-by-chain" | ||
|
|
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| // TemplateChainReconciler reconciles a TemplateChain object | ||
| type TemplateChainReconciler struct { | ||
| client.Client | ||
| SystemNamespace string | ||
| } | ||
|
|
||
| type ClusterTemplateChainReconciler struct { | ||
| TemplateChainReconciler | ||
| } | ||
|
|
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| type ServiceTemplateChainReconciler struct { | ||
| TemplateChainReconciler | ||
| } | ||
|
|
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| // TemplateChain is the interface defining a list of methods to interact with templatechains | ||
| type TemplateChain interface { | ||
| client.Object | ||
| Kind() string | ||
| TemplateKind() string | ||
| GetSpec() *hmc.TemplateChainSpec | ||
| } | ||
|
|
||
| func (r *ClusterTemplateChainReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
| l := log.FromContext(ctx).WithValues("ClusterTemplateChainController", req.NamespacedName) | ||
| l.Info("Reconciling ClusterTemplateChain") | ||
|
|
||
| clusterTemplateChain := &hmc.ClusterTemplateChain{} | ||
| err := r.Get(ctx, req.NamespacedName, clusterTemplateChain) | ||
| if err != nil { | ||
| if apierrors.IsNotFound(err) { | ||
| l.Info("ClusterTemplateChain not found, ignoring since object must be deleted") | ||
| return ctrl.Result{}, nil | ||
| } | ||
| l.Error(err, "Failed to get ClusterTemplateChain") | ||
| return ctrl.Result{}, err | ||
| } | ||
| return r.ReconcileTemplateChain(ctx, clusterTemplateChain) | ||
| } | ||
|
|
||
| func (r *ServiceTemplateChainReconciler) Reconcile(ctx context.Context, req ctrl.Request) (ctrl.Result, error) { | ||
| l := log.FromContext(ctx).WithValues("ServiceTemplateChainReconciler", req.NamespacedName) | ||
| l.Info("Reconciling ServiceTemplateChain") | ||
|
|
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| serviceTemplateChain := &hmc.ServiceTemplateChain{} | ||
| err := r.Get(ctx, req.NamespacedName, serviceTemplateChain) | ||
| if err != nil { | ||
| if apierrors.IsNotFound(err) { | ||
| l.Info("ServiceTemplateChain not found, ignoring since object must be deleted") | ||
| return ctrl.Result{}, nil | ||
| } | ||
| l.Error(err, "Failed to get ServiceTemplateChain") | ||
| return ctrl.Result{}, err | ||
| } | ||
| return r.ReconcileTemplateChain(ctx, serviceTemplateChain) | ||
| } | ||
|
|
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| func (r *TemplateChainReconciler) ReconcileTemplateChain(ctx context.Context, templateChain TemplateChain) (ctrl.Result, error) { | ||
| l := log.FromContext(ctx) | ||
|
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| systemTemplates, managedTemplates, err := getCurrentTemplates(ctx, r.Client, templateChain.TemplateKind(), r.SystemNamespace, templateChain.GetNamespace(), templateChain.GetName()) | ||
| if err != nil { | ||
| return ctrl.Result{}, fmt.Errorf("failed to get current templates: %v", err) | ||
| } | ||
|
|
||
| var errs error | ||
|
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| keepTemplate := make(map[string]bool) | ||
| for _, supportedTemplate := range templateChain.GetSpec().SupportedTemplates { | ||
| meta := metav1.ObjectMeta{ | ||
| Name: supportedTemplate.Name, | ||
| Namespace: templateChain.GetNamespace(), | ||
| Labels: map[string]string{ | ||
| hmc.HMCManagedLabelKey: hmc.HMCManagedLabelValue, | ||
| HMCManagedByChainLabelKey: templateChain.GetName(), | ||
| }, | ||
| } | ||
| keepTemplate[supportedTemplate.Name] = true | ||
|
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| source, found := systemTemplates[supportedTemplate.Name] | ||
| if !found { | ||
| errs = errors.Join(errs, fmt.Errorf("source %s %s/%s is not found", templateChain.TemplateKind(), r.SystemNamespace, supportedTemplate.Name)) | ||
| continue | ||
| } | ||
|
|
||
| templateSpec := hmc.TemplateSpecCommon{ | ||
| Helm: hmc.HelmSpec{ | ||
| ChartRef: &helmcontrollerv2.CrossNamespaceSourceReference{ | ||
| Kind: sourcev1.HelmChartKind, | ||
| Name: source.GetSpec().Helm.ChartName, | ||
| Namespace: r.SystemNamespace, | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| var target client.Object | ||
| switch templateChain.Kind() { | ||
| case hmc.ClusterTemplateChainKind: | ||
| target = &hmc.ClusterTemplate{ObjectMeta: meta, Spec: hmc.ClusterTemplateSpec{ | ||
| TemplateSpecCommon: templateSpec, | ||
| }} | ||
| case hmc.ServiceTemplateChainKind: | ||
| target = &hmc.ServiceTemplate{ObjectMeta: meta, Spec: hmc.ServiceTemplateSpec{ | ||
| TemplateSpecCommon: templateSpec, | ||
| }} | ||
| default: | ||
| return ctrl.Result{}, fmt.Errorf("invalid TemplateChain kind. Supported kinds are %s and %s", hmc.ClusterTemplateChainKind, hmc.ServiceTemplateChainKind) | ||
| } | ||
| err := r.Create(ctx, target) | ||
| if err == nil { | ||
| l.Info(fmt.Sprintf("%s was successfully created", templateChain.TemplateKind()), "namespace", templateChain.GetNamespace(), "name", supportedTemplate) | ||
| continue | ||
| } | ||
| if !apierrors.IsAlreadyExists(err) { | ||
| errs = errors.Join(errs, err) | ||
| } | ||
| } | ||
| for _, template := range managedTemplates { | ||
| if !keepTemplate[template.GetName()] { | ||
| l.Info(fmt.Sprintf("Deleting %s", templateChain.TemplateKind()), "namespace", templateChain.GetNamespace(), "name", template.GetName()) | ||
| err := r.Delete(ctx, template) | ||
| if err == nil { | ||
| l.Info(fmt.Sprintf("%s was deleted", templateChain.TemplateKind()), "namespace", templateChain.GetNamespace(), "name", template.GetName()) | ||
| continue | ||
| } | ||
| if !apierrors.IsNotFound(err) { | ||
| errs = errors.Join(errs, err) | ||
| } | ||
| } | ||
| } | ||
| return ctrl.Result{}, nil | ||
| } | ||
|
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| func getCurrentTemplates(ctx context.Context, cl client.Client, templateKind, systemNamespace, targetNamespace, templateChainName string) (map[string]Template, []Template, error) { | ||
| var templates []Template | ||
|
|
||
| switch templateKind { | ||
| case hmc.ClusterTemplateKind: | ||
| ctList := &hmc.ClusterTemplateList{} | ||
| err := cl.List(ctx, ctList) | ||
| if err != nil { | ||
| return nil, nil, err | ||
| } | ||
| for _, template := range ctList.Items { | ||
| templates = append(templates, &template) | ||
| } | ||
| case hmc.ServiceTemplateKind: | ||
| stList := &hmc.ServiceTemplateList{} | ||
| err := cl.List(ctx, stList) | ||
| if err != nil { | ||
| return nil, nil, err | ||
| } | ||
| for _, template := range stList.Items { | ||
| templates = append(templates, &template) | ||
| } | ||
| default: | ||
| return nil, nil, fmt.Errorf("invalid Template kind. Supported kinds are %s and %s", hmc.ClusterTemplateKind, hmc.ServiceTemplateKind) | ||
| } | ||
| systemTemplates := make(map[string]Template) | ||
| var managedTemplates []Template | ||
|
|
||
| for _, template := range templates { | ||
| if template.GetNamespace() == systemNamespace { | ||
| systemTemplates[template.GetName()] = template | ||
| continue | ||
| } | ||
| labels := template.GetLabels() | ||
| if template.GetNamespace() == targetNamespace && | ||
| labels[hmc.HMCManagedLabelKey] == "true" && | ||
| labels[HMCManagedByChainLabelKey] == templateChainName { | ||
| managedTemplates = append(managedTemplates, template) | ||
| } | ||
| } | ||
| return systemTemplates, managedTemplates, nil | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *ClusterTemplateChainReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| return ctrl.NewControllerManagedBy(mgr). | ||
| For(&hmc.ClusterTemplateChain{}). | ||
| Complete(r) | ||
| } | ||
|
|
||
| // SetupWithManager sets up the controller with the Manager. | ||
| func (r *ServiceTemplateChainReconciler) SetupWithManager(mgr ctrl.Manager) error { | ||
| return ctrl.NewControllerManagedBy(mgr). | ||
| For(&hmc.ServiceTemplateChain{}). | ||
| Complete(r) | ||
| } |
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