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actuator_util.go
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/
actuator_util.go
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// Copyright 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 actuator
import (
"context"
"github.com/go-logr/logr"
corev1 "k8s.io/api/core/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
commonosgenerator "github.com/gardener/gardener/extensions/pkg/controller/operatingsystemconfig/oscommon/generator"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
extensionsv1alpha1helper "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1/helper"
kubernetesutils "github.com/gardener/gardener/pkg/utils/kubernetes"
)
// CloudConfigFromOperatingSystemConfig generates a CloudConfig from an OperatingSystemConfig
// using a Generator
func CloudConfigFromOperatingSystemConfig(
ctx context.Context,
log logr.Logger,
c client.Client,
config *extensionsv1alpha1.OperatingSystemConfig,
generator commonosgenerator.Generator,
) (
[]byte,
*string,
error,
) {
files := make([]*commonosgenerator.File, 0, len(config.Spec.Files))
for _, file := range config.Spec.Files {
if file.Content.ImageRef != nil {
continue
}
data, err := DataForFileContent(ctx, c, config.Namespace, &file.Content)
if err != nil {
return nil, nil, err
}
files = append(files, &commonosgenerator.File{Path: file.Path, Content: data, Permissions: file.Permissions, TransmitUnencoded: file.Content.TransmitUnencoded})
}
units := make([]*commonosgenerator.Unit, 0, len(config.Spec.Units))
for _, unit := range config.Spec.Units {
var content []byte
if unit.Content != nil {
content = []byte(*unit.Content)
}
dropIns := make([]*commonosgenerator.DropIn, 0, len(unit.DropIns))
for _, dropIn := range unit.DropIns {
dropIns = append(dropIns, &commonosgenerator.DropIn{Name: dropIn.Name, Content: []byte(dropIn.Content)})
}
units = append(units, &commonosgenerator.Unit{Name: unit.Name, Content: content, DropIns: dropIns})
}
return generator.Generate(log, &commonosgenerator.OperatingSystemConfig{
Object: config,
Bootstrap: config.Spec.Purpose == extensionsv1alpha1.OperatingSystemConfigPurposeProvision,
CRI: config.Spec.CRIConfig,
Files: files,
Units: units,
Path: config.Spec.ReloadConfigFilePath,
})
}
// DataForFileContent returns the content for a FileContent, retrieving from a Secret if necessary.
func DataForFileContent(ctx context.Context, c client.Client, namespace string, content *extensionsv1alpha1.FileContent) ([]byte, error) {
if inline := content.Inline; inline != nil {
return extensionsv1alpha1helper.Decode(inline.Encoding, []byte(inline.Data))
}
secret := &corev1.Secret{}
if err := c.Get(ctx, kubernetesutils.Key(namespace, content.SecretRef.Name), secret); err != nil {
return nil, err
}
return secret.Data[content.SecretRef.DataKey], nil
}
// OperatingSystemConfigUnitNames returns the names of the units in the OperatingSystemConfig
func OperatingSystemConfigUnitNames(config *extensionsv1alpha1.OperatingSystemConfig) []string {
unitNames := make([]string, 0, len(config.Spec.Units))
for _, unit := range config.Spec.Units {
unitNames = append(unitNames, unit.Name)
}
return unitNames
}
// OperatingSystemConfigFilePaths returns the paths of the files in the OperatingSystemConfig
func OperatingSystemConfigFilePaths(config *extensionsv1alpha1.OperatingSystemConfig) []string {
filePaths := make([]string, 0, len(config.Spec.Files))
for _, file := range config.Spec.Files {
filePaths = append(filePaths, file.Path)
}
return filePaths
}