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ensurer.go
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ensurer.go
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// Copyright 2021 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 controlplane
import (
"context"
"path/filepath"
"github.com/Masterminds/semver/v3"
"github.com/go-logr/logr"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
vpaautoscalingv1 "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1"
kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1"
"k8s.io/utils/ptr"
"github.com/gardener/gardener/extensions/pkg/webhook"
extensionscontextwebhook "github.com/gardener/gardener/extensions/pkg/webhook/context"
"github.com/gardener/gardener/extensions/pkg/webhook/controlplane/genericmutator"
v1beta1constants "github.com/gardener/gardener/pkg/apis/core/v1beta1/constants"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/component/nodemanagement/machinecontrollermanager"
"github.com/gardener/gardener/pkg/provider-local/imagevector"
"github.com/gardener/gardener/pkg/provider-local/local"
gardenerutils "github.com/gardener/gardener/pkg/utils/gardener"
)
// NewEnsurer creates a new controlplane ensurer.
func NewEnsurer(logger logr.Logger, useGardenerNodeAgent bool) genericmutator.Ensurer {
return &ensurer{
logger: logger.WithName("local-controlplane-ensurer"),
useGardenerNodeAgent: useGardenerNodeAgent,
}
}
type ensurer struct {
genericmutator.NoopEnsurer
logger logr.Logger
useGardenerNodeAgent bool
}
// EnsureMachineControllerManagerDeployment ensures that the machine-controller-manager deployment conforms to the provider requirements.
func (e *ensurer) EnsureMachineControllerManagerDeployment(_ context.Context, _ extensionscontextwebhook.GardenContext, newObj, _ *appsv1.Deployment) error {
image, err := imagevector.ImageVector().FindImage(imagevector.ImageNameMachineControllerManagerProviderLocal)
if err != nil {
return err
}
newObj.Spec.Template.Spec.Containers = webhook.EnsureContainerWithName(
newObj.Spec.Template.Spec.Containers,
machinecontrollermanager.ProviderSidecarContainer(newObj.Namespace, local.Name, image.String()),
)
return nil
}
// EnsureMachineControllerManagerVPA ensures that the machine-controller-manager VPA conforms to the provider requirements.
func (e *ensurer) EnsureMachineControllerManagerVPA(_ context.Context, _ extensionscontextwebhook.GardenContext, newObj, _ *vpaautoscalingv1.VerticalPodAutoscaler) error {
var (
minAllowed = corev1.ResourceList{
corev1.ResourceMemory: resource.MustParse("64Mi"),
}
maxAllowed = corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("2"),
corev1.ResourceMemory: resource.MustParse("5G"),
}
)
newObj.Spec.ResourcePolicy.ContainerPolicies = webhook.EnsureVPAContainerResourcePolicyWithName(
newObj.Spec.ResourcePolicy.ContainerPolicies,
machinecontrollermanager.ProviderSidecarVPAContainerPolicy(local.Name, minAllowed, maxAllowed),
)
return nil
}
func (e *ensurer) EnsureKubeAPIServerDeployment(_ context.Context, _ extensionscontextwebhook.GardenContext, new, _ *appsv1.Deployment) error {
metav1.SetMetaDataLabel(&new.Spec.Template.ObjectMeta, gardenerutils.NetworkPolicyLabel("machines", 10250), v1beta1constants.LabelNetworkPolicyAllowed)
return nil
}
func (e *ensurer) EnsureKubeletConfiguration(_ context.Context, _ extensionscontextwebhook.GardenContext, _ *semver.Version, newObj, _ *kubeletconfigv1beta1.KubeletConfiguration) error {
newObj.FailSwapOn = ptr.To(false)
newObj.CgroupDriver = "systemd"
return nil
}
func (e *ensurer) EnsureAdditionalFiles(_ context.Context, _ extensionscontextwebhook.GardenContext, new, _ *[]extensionsv1alpha1.File) error {
// TODO(rfranzke): Remove this function when UseGardenerNodeAgent feature gate gets promoted to GA.
ensureRegistryMirrorConfig(new)
return nil
}
func (e *ensurer) EnsureAdditionalProvisionFiles(_ context.Context, _ extensionscontextwebhook.GardenContext, new, _ *[]extensionsv1alpha1.File) error {
if e.useGardenerNodeAgent {
ensureRegistryMirrorConfig(new)
}
return nil
}
func ensureRegistryMirrorConfig(new *[]extensionsv1alpha1.File) {
mirrors := []RegistryMirror{
{UpstreamHost: "localhost:5001", UpstreamServer: "http://localhost:5001", MirrorHost: "http://garden.local.gardener.cloud:5001"},
{UpstreamHost: "gcr.io", UpstreamServer: "https://gcr.io", MirrorHost: "http://garden.local.gardener.cloud:5003"},
{UpstreamHost: "eu.gcr.io", UpstreamServer: "https://eu.gcr.io", MirrorHost: "http://garden.local.gardener.cloud:5004"},
{UpstreamHost: "ghcr.io", UpstreamServer: "https://ghcr.io", MirrorHost: "http://garden.local.gardener.cloud:5005"},
{UpstreamHost: "registry.k8s.io", UpstreamServer: "https://registry.k8s.io", MirrorHost: "http://garden.local.gardener.cloud:5006"},
{UpstreamHost: "quay.io", UpstreamServer: "https://quay.io", MirrorHost: "http://garden.local.gardener.cloud:5007"},
{UpstreamHost: "europe-docker.pkg.dev", UpstreamServer: "https://europe-docker.pkg.dev", MirrorHost: "http://garden.local.gardener.cloud:5008"},
}
for _, mirror := range mirrors {
// appendFileIfNotPresent in used instead of appendUniqueFile intentionally to allow enabling and testing the registry-cache extension in local setup.
// A file appended by the registry-cache extension is always picked up because:
// - if a file is already appended by the registry-cache extension, provider-local won't overwrite it (appendFileIfNotPresent)
// - if a file is already appended by provider-local, the registry-cache extension will overwrite it (appendUniqueFile)
appendFileIfNotPresent(new, extensionsv1alpha1.File{
Path: filepath.Join("/etc/containerd/certs.d", mirror.UpstreamHost, "hosts.toml"),
Permissions: ptr.To(int32(0644)),
Content: extensionsv1alpha1.FileContent{
Inline: &extensionsv1alpha1.FileContentInline{
Data: mirror.HostsTOML(),
},
},
})
}
}
func appendFileIfNotPresent(files *[]extensionsv1alpha1.File, file extensionsv1alpha1.File) {
if !containsFilePath(files, file.Path) {
*files = append(*files, file)
}
}
func containsFilePath(files *[]extensionsv1alpha1.File, filePath string) bool {
for _, f := range *files {
if f.Path == filePath {
return true
}
}
return false
}