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mutate_machinedeployment.go
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mutate_machinedeployment.go
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// Package machinedeployment intercepts write activity to MachineDeployment objects.
package machinedeployment
import (
"fmt"
"github.com/blang/semver/v4"
"github.com/giantswarm/k8sclient/v7/pkg/k8sclient"
"github.com/giantswarm/microerror"
"github.com/giantswarm/micrologger"
admissionv1 "k8s.io/api/admission/v1"
v1 "k8s.io/api/core/v1"
capi "sigs.k8s.io/cluster-api/api/v1beta1"
"github.com/giantswarm/aws-admission-controller/v4/config"
aws "github.com/giantswarm/aws-admission-controller/v4/pkg/aws/v1alpha3"
"github.com/giantswarm/aws-admission-controller/v4/pkg/key"
"github.com/giantswarm/aws-admission-controller/v4/pkg/label"
"github.com/giantswarm/aws-admission-controller/v4/pkg/mutator"
)
type Config struct {
K8sClient k8sclient.Interface
Logger micrologger.Logger
}
// Mutator for MachineDeployment object.
type Mutator struct {
k8sClient k8sclient.Interface
logger micrologger.Logger
}
func NewMutator(config config.Config) (*Mutator, error) {
if config.K8sClient == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.K8sClient must not be empty", config)
}
if config.Logger == nil {
return nil, microerror.Maskf(invalidConfigError, "%T.Logger must not be empty", config)
}
mutator := &Mutator{
k8sClient: config.K8sClient,
logger: config.Logger,
}
return mutator, nil
}
// Mutate is the function executed for every matching webhook request.
func (m *Mutator) Mutate(request *admissionv1.AdmissionRequest) ([]mutator.PatchOperation, error) {
var result []mutator.PatchOperation
if request.DryRun != nil && *request.DryRun {
return result, nil
}
if request.Operation == admissionv1.Create {
return m.MutateCreate(request)
}
if request.Operation == admissionv1.Update {
return m.MutateUpdate(request)
}
return result, nil
}
// MutateCreate is the function executed for every create webhook request.
func (m *Mutator) MutateCreate(request *admissionv1.AdmissionRequest) ([]mutator.PatchOperation, error) {
var result []mutator.PatchOperation
var patch []mutator.PatchOperation
var err error
// Parse incoming object
machineDeployment := &capi.MachineDeployment{}
if _, _, err := mutator.Deserializer.Decode(request.Object.Raw, nil, machineDeployment); err != nil {
return nil, microerror.Maskf(parsingFailedError, "unable to parse MachineDeployment: %v", err)
}
capi, err := aws.IsCAPIRelease(machineDeployment)
if err != nil {
return nil, microerror.Mask(err)
}
if capi {
return result, nil
}
patch, err = m.MutateReleaseVersion(*machineDeployment)
if err != nil {
return nil, microerror.Mask(err)
}
result = append(result, patch...)
releaseVersion, err := aws.ReleaseVersion(machineDeployment, patch)
if err != nil {
return nil, microerror.Maskf(parsingFailedError, "unable to parse release version from Cluster")
}
patch = aws.MutateCAPILabel(&aws.Handler{K8sClient: m.k8sClient, Logger: m.logger}, machineDeployment)
result = append(result, patch...)
patch = m.MutateClusterName(*machineDeployment)
result = append(result, patch...)
patch = m.MutateTemplateClusterName(*machineDeployment)
result = append(result, patch...)
patch, err = m.MutateInfraRef(*machineDeployment, releaseVersion)
if err != nil {
return nil, microerror.Mask(err)
}
result = append(result, patch...)
return result, nil
}
// MutateUpdate is the function executed for every update webhook request.
func (m *Mutator) MutateUpdate(request *admissionv1.AdmissionRequest) ([]mutator.PatchOperation, error) {
var result []mutator.PatchOperation
var patch []mutator.PatchOperation
var err error
// Parse incoming object
machineDeployment := &capi.MachineDeployment{}
oldMachineDeployment := &capi.MachineDeployment{}
if _, _, err := mutator.Deserializer.Decode(request.Object.Raw, nil, machineDeployment); err != nil {
return nil, microerror.Maskf(parsingFailedError, "unable to parse Cluster: %v", err)
}
if _, _, err := mutator.Deserializer.Decode(request.OldObject.Raw, nil, oldMachineDeployment); err != nil {
return nil, microerror.Maskf(parsingFailedError, "unable to parse old Cluster: %v", err)
}
releaseVersion, err := aws.ReleaseVersion(machineDeployment, patch)
if err != nil {
return nil, microerror.Maskf(parsingFailedError, "unable to parse release version from Cluster")
}
patch = aws.MutateCAPILabel(&aws.Handler{K8sClient: m.k8sClient, Logger: m.logger}, machineDeployment)
result = append(result, patch...)
patch = m.MutateClusterName(*machineDeployment)
result = append(result, patch...)
patch = m.MutateTemplateClusterName(*machineDeployment)
result = append(result, patch...)
patch, err = m.MutateInfraRef(*machineDeployment, releaseVersion)
if err != nil {
return nil, microerror.Mask(err)
}
result = append(result, patch...)
return result, nil
}
func (m *Mutator) MutateReleaseVersion(machineDeployment capi.MachineDeployment) ([]mutator.PatchOperation, error) {
var result []mutator.PatchOperation
var patch []mutator.PatchOperation
var err error
if key.Release(&machineDeployment) != "" && key.ClusterOperator(&machineDeployment) != "" {
return result, nil
}
// Retrieve the `Cluster` CR related to this object.
cluster, err := aws.FetchCluster(&aws.Handler{K8sClient: m.k8sClient, Logger: m.logger}, &machineDeployment)
if err != nil {
return nil, microerror.Mask(err)
}
// mutate the release label
patch, err = aws.MutateLabelFromCluster(&aws.Handler{K8sClient: m.k8sClient, Logger: m.logger}, &machineDeployment, *cluster, label.Release)
if err != nil {
return nil, microerror.Mask(err)
}
result = append(result, patch...)
// mutate the operator label
patch, err = aws.MutateLabelFromCluster(&aws.Handler{K8sClient: m.k8sClient, Logger: m.logger}, &machineDeployment, *cluster, label.ClusterOperatorVersion)
if err != nil {
return nil, microerror.Mask(err)
}
result = append(result, patch...)
return result, nil
}
func (m *Mutator) MutateInfraRef(machineDeployment capi.MachineDeployment, releaseVersion *semver.Version) ([]mutator.PatchOperation, error) {
var result []mutator.PatchOperation
if machineDeployment.Spec.Template.Spec.InfrastructureRef.Name != "" && machineDeployment.Spec.Template.Spec.InfrastructureRef.Namespace != "" {
return result, nil
}
namespace := machineDeployment.GetNamespace()
if namespace == "" {
namespace = v1.NamespaceDefault
}
var infrastructureCRRef v1.ObjectReference
if aws.IsV1Alpha3Ready(releaseVersion) && machineDeployment.Spec.Template.Spec.InfrastructureRef.APIVersion == "infrastructure.giantswarm.io/v1alpha2" {
infrastructureCRRef = v1.ObjectReference{
APIVersion: "infrastructure.giantswarm.io/v1alpha3",
Kind: "AWSCluster",
Name: machineDeployment.GetName(),
Namespace: namespace,
}
m.Log("level", "debug", "message", fmt.Sprintf("Updating infrastructure reference to %s", machineDeployment.Name))
patch := mutator.PatchReplace("/spec/template/spec/infrastructureRef", &infrastructureCRRef)
result = append(result, patch)
return result, nil
}
return nil, nil
}
func (m *Mutator) MutateClusterName(machineDeployment capi.MachineDeployment) []mutator.PatchOperation {
var result []mutator.PatchOperation
if machineDeployment.Spec.ClusterName != "" {
return result
}
m.Log("level", "debug", "message", fmt.Sprintf("Updating cluster name to %s", machineDeployment.Labels[label.Cluster]))
patch := mutator.PatchReplace("/spec/clusterName", machineDeployment.Labels[label.Cluster])
result = append(result, patch)
return result
}
func (m *Mutator) MutateTemplateClusterName(machineDeployment capi.MachineDeployment) []mutator.PatchOperation {
var result []mutator.PatchOperation
if machineDeployment.Spec.Template.Spec.ClusterName != "" {
return result
}
m.Log("level", "debug", "message", fmt.Sprintf("Updating template cluster name to %s", machineDeployment.Labels[label.Cluster]))
patch := mutator.PatchReplace("/spec/template/spec/clusterName", machineDeployment.Labels[label.Cluster])
result = append(result, patch)
return result
}
func (m *Mutator) Log(keyVals ...interface{}) {
m.logger.Log(keyVals...)
}
func (m *Mutator) Resource() string {
return "machinedeployment"
}