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machine_crds.go
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machine_crds.go
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// Copyright (c) 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 worker
import (
"bytes"
"context"
"embed"
"io/fs"
"path/filepath"
"text/template"
apiextensionsscheme "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/scheme"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/rest"
"k8s.io/helm/pkg/engine"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/gardener/gardener/pkg/client/kubernetes"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
)
var (
//go:embed templates/*
templateContent embed.FS
machineCRDTpls []*template.Template
apiextensionsScheme = runtime.NewScheme()
deletionProtectionLabels = map[string]string{
gardenerutils.DeletionProtected: "true",
}
)
func init() {
var err error
templates, err := fs.Sub(templateContent, "templates")
utilruntime.Must(err)
filenames, err := fs.Glob(templates, "*.tpl.yaml")
utilruntime.Must(err)
for _, filename := range filenames {
file, err := templateContent.ReadFile(filepath.Join("templates", filename))
utilruntime.Must(err)
tpl := template.Must(
template.
New(filename).
Funcs(engine.FuncMap()).
Parse(string(file)),
)
machineCRDTpls = append(machineCRDTpls, tpl)
}
utilruntime.Must(apiextensionsscheme.AddToScheme(apiextensionsScheme))
}
// ApplyMachineResourcesForConfig ensures that all well-known machine CRDs are created or updated.
func ApplyMachineResourcesForConfig(ctx context.Context, config *rest.Config) error {
c, err := client.New(config, client.Options{Scheme: apiextensionsScheme})
if err != nil {
return err
}
return ApplyMachineResources(ctx, c)
}
// ApplyMachineResources ensures that all well-known machine CRDs are created or updated.
func ApplyMachineResources(ctx context.Context, c client.Client) error {
var content bytes.Buffer
for _, crdTpl := range machineCRDTpls {
if err := crdTpl.Execute(&content, map[string]interface{}{
"labels": deletionProtectionLabels,
}); err != nil {
return err
}
content.Write([]byte("\n---\n"))
}
manifestReader := kubernetes.NewManifestReader(content.Bytes())
applier := kubernetes.NewApplier(c, c.RESTMapper())
return applier.ApplyManifest(ctx, manifestReader, kubernetes.DefaultMergeFuncs)
}