/
ensurer.go
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/
ensurer.go
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// Copyright 2023 OnMetal authors
//
// 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"
"github.com/Masterminds/semver"
"github.com/coreos/go-systemd/v22/unit"
extensionswebhook "github.com/gardener/gardener/extensions/pkg/webhook"
gcontext "github.com/gardener/gardener/extensions/pkg/webhook/context"
"github.com/gardener/gardener/extensions/pkg/webhook/controlplane/genericmutator"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/component/machinecontrollermanager"
"github.com/go-logr/logr"
"github.com/onmetal/gardener-extension-provider-onmetal/pkg/internal/imagevector"
"github.com/onmetal/gardener-extension-provider-onmetal/pkg/onmetal"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
vpaautoscalingv1 "k8s.io/autoscaler/vertical-pod-autoscaler/pkg/apis/autoscaling.k8s.io/v1"
kubeletconfigv1beta1 "k8s.io/kubelet/config/v1beta1"
)
// NewEnsurer creates a new controlplane ensurer.
func NewEnsurer(logger logr.Logger, gardenletManagesMCM bool) genericmutator.Ensurer {
return &ensurer{
logger: logger.WithName("onmetal-controlplane-ensurer"),
gardenletManagesMCM: gardenletManagesMCM,
}
}
type ensurer struct {
genericmutator.NoopEnsurer
logger logr.Logger
gardenletManagesMCM bool
}
// ImageVector is exposed for testing.
var ImageVector = imagevector.ImageVector()
// EnsureMachineControllerManagerDeployment ensures that the machine-controller-manager deployment conforms to the provider requirements.
func (e *ensurer) EnsureMachineControllerManagerDeployment(_ context.Context, _ gcontext.GardenContext, newObj, _ *appsv1.Deployment) error {
if !e.gardenletManagesMCM {
return nil
}
image, err := ImageVector.FindImage(onmetal.MachineControllerManagerProviderOnmetalImageName)
if err != nil {
return err
}
template := &newObj.Spec.Template
ps := &template.Spec
ps.Containers = extensionswebhook.EnsureContainerWithName(
newObj.Spec.Template.Spec.Containers,
machinecontrollermanager.ProviderSidecarContainer(newObj.Namespace, onmetal.ProviderName, image.String()),
)
if c := extensionswebhook.ContainerWithName(ps.Containers, "machine-controller-manager-provider-onmetal"); c != nil {
ensureMCMCommandLineArgs(c)
c.VolumeMounts = extensionswebhook.EnsureVolumeMountWithName(c.VolumeMounts, corev1.VolumeMount{
Name: "cloudprovider",
MountPath: "/etc/onmetal",
ReadOnly: true,
})
}
ps.Volumes = extensionswebhook.EnsureVolumeWithName(ps.Volumes, corev1.Volume{
Name: "cloudprovider",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: "cloudprovider",
},
},
})
return nil
}
// EnsureMachineControllerManagerVPA ensures that the machine-controller-manager VPA conforms to the provider requirements.
func (e *ensurer) EnsureMachineControllerManagerVPA(_ context.Context, _ gcontext.GardenContext, newObj, _ *vpaautoscalingv1.VerticalPodAutoscaler) error {
if !e.gardenletManagesMCM {
return nil
}
var (
minAllowed = corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("30m"),
corev1.ResourceMemory: resource.MustParse("64Mi"),
}
maxAllowed = corev1.ResourceList{
corev1.ResourceCPU: resource.MustParse("2"),
corev1.ResourceMemory: resource.MustParse("5G"),
}
)
if newObj.Spec.ResourcePolicy == nil {
newObj.Spec.ResourcePolicy = &vpaautoscalingv1.PodResourcePolicy{}
}
newObj.Spec.ResourcePolicy.ContainerPolicies = extensionswebhook.EnsureVPAContainerResourcePolicyWithName(
newObj.Spec.ResourcePolicy.ContainerPolicies,
machinecontrollermanager.ProviderSidecarVPAContainerPolicy(onmetal.ProviderName, minAllowed, maxAllowed),
)
return nil
}
// EnsureKubeAPIServerDeployment ensures that the kube-apiserver deployment conforms to the provider requirements.
func (e *ensurer) EnsureKubeAPIServerDeployment(_ context.Context, _ gcontext.GardenContext, new, _ *appsv1.Deployment) error {
template := &new.Spec.Template
ps := &template.Spec
if c := extensionswebhook.ContainerWithName(ps.Containers, "kube-apiserver"); c != nil {
ensureKubeAPIServerCommandLineArgs(c)
}
return nil
}
// EnsureKubeControllerManagerDeployment ensures that the kube-controller-manager deployment conforms to the provider requirements.
func (e *ensurer) EnsureKubeControllerManagerDeployment(_ context.Context, _ gcontext.GardenContext, new, _ *appsv1.Deployment) error {
template := &new.Spec.Template
ps := &template.Spec
if c := extensionswebhook.ContainerWithName(ps.Containers, "kube-controller-manager"); c != nil {
ensureKubeControllerManagerCommandLineArgs(c)
}
return nil
}
// EnsureKubeSchedulerDeployment ensures that the kube-scheduler deployment conforms to the provider requirements.
func (e *ensurer) EnsureKubeSchedulerDeployment(_ context.Context, _ gcontext.GardenContext, _, _ *appsv1.Deployment) error {
return nil
}
// EnsureClusterAutoscalerDeployment ensures that the cluster-autoscaler deployment conforms to the provider requirements.
func (e *ensurer) EnsureClusterAutoscalerDeployment(_ context.Context, _ gcontext.GardenContext, _, _ *appsv1.Deployment) error {
return nil
}
func ensureMCMCommandLineArgs(c *corev1.Container) {
c.Command = extensionswebhook.EnsureStringWithPrefix(c.Command, "--onmetal-kubeconfig=", "/etc/onmetal/kubeconfig")
}
func ensureKubeAPIServerCommandLineArgs(c *corev1.Container) {
c.Command = extensionswebhook.EnsureNoStringWithPrefix(c.Command, "--cloud-provider=")
c.Command = extensionswebhook.EnsureNoStringWithPrefix(c.Command, "--cloud-config=")
}
func ensureKubeControllerManagerCommandLineArgs(c *corev1.Container) {
c.Command = extensionswebhook.EnsureStringWithPrefix(c.Command, "--cloud-provider=", "external")
c.Command = extensionswebhook.EnsureNoStringWithPrefix(c.Command, "--cloud-config=")
}
// EnsureKubeletServiceUnitOptions ensures that the kubelet.service unit options conform to the provider requirements.
func (e *ensurer) EnsureKubeletServiceUnitOptions(_ context.Context, _ gcontext.GardenContext, _ *semver.Version, new, _ []*unit.UnitOption) ([]*unit.UnitOption, error) {
if opt := extensionswebhook.UnitOptionWithSectionAndName(new, "Service", "ExecStart"); opt != nil {
command := extensionswebhook.DeserializeCommandLine(opt.Value)
command = ensureKubeletCommandLineArgs(command)
opt.Value = extensionswebhook.SerializeCommandLine(command, 1, " \\\n ")
}
new = extensionswebhook.EnsureUnitOption(new, &unit.UnitOption{
Section: "Service",
Name: "ExecStartPre",
Value: `/bin/sh -c 'hostnamectl set-hostname $(hostname -f)'`,
})
return new, nil
}
func ensureKubeletCommandLineArgs(command []string) []string {
command = extensionswebhook.EnsureStringWithPrefix(command, "--cloud-provider=", "external")
return command
}
// EnsureKubeletConfiguration ensures that the kubelet configuration conforms to the provider requirements.
func (e *ensurer) EnsureKubeletConfiguration(_ context.Context, _ gcontext.GardenContext, _ *semver.Version, _, _ *kubeletconfigv1beta1.KubeletConfiguration) error {
return nil
}
// EnsureKubernetesGeneralConfiguration ensures that the kubernetes general configuration conforms to the provider requirements.
func (e *ensurer) EnsureKubernetesGeneralConfiguration(_ context.Context, _ gcontext.GardenContext, _, _ *string) error {
return nil
}
// EnsureAdditionalUnits ensures that additional required system units are added.
func (e *ensurer) EnsureAdditionalUnits(_ context.Context, _ gcontext.GardenContext, _, _ *[]extensionsv1alpha1.Unit) error {
return nil
}
// EnsureAdditionalFiles ensures that additional required system files are added.
func (e *ensurer) EnsureAdditionalFiles(_ context.Context, _ gcontext.GardenContext, _, _ *[]extensionsv1alpha1.File) error {
return nil
}