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create_machine.go
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/
create_machine.go
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// SPDX-FileCopyrightText: 2024 SAP SE or an SAP affiliate company and Gardener contributors
//
// SPDX-License-Identifier: Apache-2.0
package local
import (
"context"
"encoding/json"
"fmt"
machinev1alpha1 "github.com/gardener/machine-controller-manager/pkg/apis/machine/v1alpha1"
"github.com/gardener/machine-controller-manager/pkg/util/provider/driver"
"github.com/gardener/machine-controller-manager/pkg/util/provider/machinecodes/codes"
"github.com/gardener/machine-controller-manager/pkg/util/provider/machinecodes/status"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/validation/field"
"k8s.io/klog/v2"
"k8s.io/utils/pointer"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
apiv1alpha1 "github.com/gardener/machine-controller-manager-provider-local/pkg/api/v1alpha1"
"github.com/gardener/machine-controller-manager-provider-local/pkg/api/validation"
)
func (d *localDriver) CreateMachine(ctx context.Context, req *driver.CreateMachineRequest) (*driver.CreateMachineResponse, error) {
if req.MachineClass.Provider != apiv1alpha1.Provider {
return nil, status.Error(codes.InvalidArgument, fmt.Sprintf("requested for Provider '%s', we only support '%s'", req.MachineClass.Provider, apiv1alpha1.Provider))
}
klog.V(3).Infof("Machine creation request has been received for %q", req.Machine.Name)
defer klog.V(3).Infof("Machine creation request has been processed for %q", req.Machine.Name)
providerSpec, err := validateProviderSpecAndSecret(req.MachineClass, req.Secret)
if err != nil {
return nil, err
}
userDataSecret := userDataSecretForMachine(req.Machine)
userDataSecret.Data = map[string][]byte{"userdata": req.Secret.Data["userData"]}
if err := controllerutil.SetControllerReference(req.Machine, userDataSecret, d.client.Scheme()); err != nil {
return nil, status.Error(codes.Internal, fmt.Sprintf("could not set userData secret ownership: %s", err.Error()))
}
if err := d.client.Patch(ctx, userDataSecret, client.Apply, fieldOwner, client.ForceOwnership); err != nil {
return nil, status.Error(codes.Internal, fmt.Sprintf("error applying user data secret: %s", err.Error()))
}
if _, err := d.applyService(ctx, req); err != nil {
return nil, err
}
pod, err := d.applyPod(ctx, req, providerSpec, userDataSecret)
if err != nil {
return nil, err
}
return &driver.CreateMachineResponse{
ProviderID: pod.Name,
NodeName: pod.Name,
}, nil
}
func (d *localDriver) applyService(ctx context.Context, req *driver.CreateMachineRequest) (*corev1.Service, error) {
svc := service(req.Machine)
svc.Spec.Type = corev1.ServiceTypeClusterIP
svc.Spec.ClusterIP = corev1.ClusterIPNone
svc.Spec.Ports = []corev1.ServicePort{{
Port: 10250,
Protocol: corev1.ProtocolTCP,
TargetPort: intstr.FromInt(10250),
}}
svc.Spec.Selector = map[string]string{
labelKeyProvider: apiv1alpha1.Provider,
labelKeyApp: labelValueMachine,
}
if err := d.client.Patch(ctx, svc, client.Apply, fieldOwner, client.ForceOwnership); err != nil {
return nil, status.Error(codes.Internal, fmt.Sprintf("error applying service: %s", err.Error()))
}
return svc, nil
}
func (d *localDriver) applyPod(
ctx context.Context,
req *driver.CreateMachineRequest,
providerSpec *apiv1alpha1.ProviderSpec,
userDataSecret *corev1.Secret,
) (
*corev1.Pod,
error,
) {
pod := podForMachine(req.Machine)
pod.Labels = map[string]string{
labelKeyProvider: apiv1alpha1.Provider,
labelKeyApp: labelValueMachine,
"networking.gardener.cloud/to-dns": "allowed",
"networking.gardener.cloud/to-private-networks": "allowed",
"networking.gardener.cloud/to-public-networks": "allowed",
"networking.gardener.cloud/to-shoot-networks": "allowed",
"networking.gardener.cloud/to-runtime-apiserver": "allowed", // needed for ManagedSeeds such that gardenlets deployed to these Machines can talk to the seed's kube-apiserver (which is the same like the garden cluster kube-apiserver)
"networking.resources.gardener.cloud/to-kube-apiserver-tcp-443": "allowed",
}
pod.Spec = corev1.PodSpec{
Containers: []corev1.Container{
{
Name: "node",
Image: providerSpec.Image,
ImagePullPolicy: corev1.PullIfNotPresent,
SecurityContext: &corev1.SecurityContext{
Privileged: pointer.Bool(true),
},
Env: []corev1.EnvVar{{
Name: "NODE_NAME",
ValueFrom: &corev1.EnvVarSource{
FieldRef: &corev1.ObjectFieldSelector{
FieldPath: "metadata.name",
},
},
}},
VolumeMounts: []corev1.VolumeMount{
{
Name: "userdata",
MountPath: "/etc/machine",
},
{
Name: "containerd",
MountPath: "/var/lib/containerd",
},
{
Name: "modules",
MountPath: "/lib/modules",
ReadOnly: true,
},
},
ReadinessProbe: &corev1.Probe{
ProbeHandler: corev1.ProbeHandler{
Exec: &corev1.ExecAction{
Command: []string{"sh", "-c", "/usr/bin/kubectl --kubeconfig /var/lib/kubelet/kubeconfig-real get no $NODE_NAME"},
},
},
},
Ports: []corev1.ContainerPort{{
ContainerPort: 30123,
Name: "vpn-shoot",
Protocol: corev1.ProtocolTCP,
}},
},
},
Volumes: []corev1.Volume{
{
Name: "userdata",
VolumeSource: corev1.VolumeSource{
Secret: &corev1.SecretVolumeSource{
SecretName: userDataSecret.Name,
DefaultMode: pointer.Int32(0777),
},
},
},
{
Name: "containerd",
VolumeSource: corev1.VolumeSource{
EmptyDir: &corev1.EmptyDirVolumeSource{},
},
},
{
Name: "modules",
VolumeSource: corev1.VolumeSource{
HostPath: &corev1.HostPathVolumeSource{
Path: "/lib/modules",
},
},
},
},
}
if err := controllerutil.SetControllerReference(req.Machine, pod, d.client.Scheme()); err != nil {
return nil, status.Error(codes.Internal, fmt.Sprintf("could not set pod ownership: %s", err.Error()))
}
if err := d.client.Patch(ctx, pod, client.Apply, fieldOwner, client.ForceOwnership); err != nil {
return nil, status.Error(codes.Internal, fmt.Sprintf("error applying pod: %s", err.Error()))
}
return pod, nil
}
func validateProviderSpecAndSecret(machineClass *machinev1alpha1.MachineClass, secret *corev1.Secret) (*apiv1alpha1.ProviderSpec, error) {
if machineClass == nil {
return nil, status.Error(codes.Internal, "MachineClass ProviderSpec is nil")
}
var providerSpec *apiv1alpha1.ProviderSpec
if err := json.Unmarshal(machineClass.ProviderSpec.Raw, &providerSpec); err != nil {
return nil, status.Error(codes.Internal, err.Error())
}
validationErr := validation.ValidateProviderSpec(providerSpec, secret, field.NewPath("providerSpec"))
if validationErr.ToAggregate() != nil && len(validationErr.ToAggregate().Errors()) > 0 {
err := fmt.Errorf("error while validating ProviderSpec: %v", validationErr.ToAggregate().Error())
klog.V(2).Infof("Validation of AWSMachineClass failed %s", err)
return nil, status.Error(codes.Internal, err.Error())
}
return providerSpec, nil
}