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configurator.go
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/
configurator.go
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// Copyright (c) 2020 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 v18
import (
"bytes"
"fmt"
"time"
"github.com/gardener/gardener/pkg/operation/botanist/component/gardenerkubescheduler/configurator"
"github.com/gardener/gardener/pkg/utils"
schedulerv18v1alpha2 "github.com/gardener/gardener/third_party/kube-scheduler/v18/v1alpha2"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
componentbaseconfigv1alpha1 "k8s.io/component-base/config/v1alpha1"
"k8s.io/utils/pointer"
)
type v18Configurator struct {
config *schedulerv18v1alpha2.KubeSchedulerConfiguration
codec serializer.CodecFactory
}
// NewConfigurator creates a Configurator for Kubernetes version 1.18.
func NewConfigurator(resourceName, namespace string, config *schedulerv18v1alpha2.KubeSchedulerConfiguration) (configurator.Configurator, error) {
scheme := runtime.NewScheme()
if err := schedulerv18v1alpha2.AddToScheme(scheme); err != nil {
return nil, err
}
config.LeaderElection.LeaderElectionConfiguration = componentbaseconfigv1alpha1.LeaderElectionConfiguration{
LeaseDuration: metav1.Duration{Duration: 15 * time.Second},
RenewDeadline: metav1.Duration{Duration: 10 * time.Second},
RetryPeriod: metav1.Duration{Duration: 2 * time.Second},
ResourceLock: "leases",
ResourceName: resourceName,
LeaderElect: pointer.BoolPtr(true),
ResourceNamespace: namespace,
}
return &v18Configurator{
config: config,
codec: serializer.NewCodecFactory(scheme, serializer.EnableStrict),
}, nil
}
func (c *v18Configurator) Config() (string, string, error) {
const mediaType = runtime.ContentTypeYAML
componentConfigYAML := &bytes.Buffer{}
info, ok := runtime.SerializerInfoForMediaType(c.codec.SupportedMediaTypes(), mediaType)
if !ok {
return "", "", fmt.Errorf("unable to locate encoder -- %q is not a supported media type", mediaType)
}
encoder := c.codec.EncoderForVersion(info.Serializer, schedulerv18v1alpha2.SchemeGroupVersion)
if err := encoder.Encode(c.config, componentConfigYAML); err != nil {
return "", "", err
}
return componentConfigYAML.String(), utils.ComputeSHA256Hex(componentConfigYAML.Bytes()), nil
}