/
mesh_mutator.go
84 lines (72 loc) · 2.48 KB
/
mesh_mutator.go
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package appmesh
import (
"context"
appmesh "github.com/aws/aws-app-mesh-controller-for-k8s/apis/appmesh/v1beta2"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/webhook"
"github.com/aws/aws-sdk-go/aws"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
const apiPathMutateAppMeshMesh = "/mutate-appmesh-k8s-aws-v1beta2-mesh"
// NewMeshMutator returns a mutator for Mesh.
func NewMeshMutator(ipFamily string) *meshMutator {
return &meshMutator{
ipFamily: ipFamily,
}
}
var _ webhook.Mutator = &meshMutator{}
type meshMutator struct {
ipFamily string
}
func (m *meshMutator) Prototype(req admission.Request) (runtime.Object, error) {
return &appmesh.Mesh{}, nil
}
func (m *meshMutator) MutateCreate(ctx context.Context, obj runtime.Object) (runtime.Object, error) {
mesh := obj.(*appmesh.Mesh)
if err := m.defaultingAWSName(mesh); err != nil {
return nil, err
}
if err := m.defaultingIpPreference(mesh); err != nil {
return nil, err
}
return mesh, nil
}
func (m *meshMutator) MutateUpdate(ctx context.Context, obj runtime.Object, oldObj runtime.Object) (runtime.Object, error) {
mesh := obj.(*appmesh.Mesh)
if err := m.defaultingIpPreference(mesh); err != nil {
return nil, err
}
return obj, nil
}
func (m *meshMutator) defaultingAWSName(mesh *appmesh.Mesh) error {
if mesh.Spec.AWSName == nil || len(*mesh.Spec.AWSName) == 0 {
awsName := mesh.Name
mesh.Spec.AWSName = &awsName
}
return nil
}
func (m *meshMutator) defaultingIpPreference(mesh *appmesh.Mesh) error {
if mesh.Spec.ServiceDiscovery == nil {
if m.ipFamily == IPv6 {
mesh.Spec.ServiceDiscovery = &appmesh.MeshServiceDiscovery{
IpPreference: aws.String(appmesh.IpPreferenceIPv6),
}
}
} else if mesh.Spec.ServiceDiscovery != nil {
if m.ipFamily == IPv6 {
mesh.Spec.ServiceDiscovery = &appmesh.MeshServiceDiscovery{
IpPreference: aws.String(appmesh.IpPreferenceIPv6),
}
} else {
mesh.Spec.ServiceDiscovery = &appmesh.MeshServiceDiscovery{
IpPreference: aws.String(appmesh.IpPreferenceIPv4),
}
}
}
return nil
}
// +kubebuilder:webhook:path=/mutate-appmesh-k8s-aws-v1beta2-mesh,mutating=true,failurePolicy=fail,groups=appmesh.k8s.aws,resources=meshes,verbs=create;update,versions=v1beta2,name=mmesh.appmesh.k8s.aws,sideEffects=None,webhookVersions=v1beta1
func (m *meshMutator) SetupWithManager(mgr ctrl.Manager) {
mgr.GetWebhookServer().Register(apiPathMutateAppMeshMesh, webhook.MutatingWebhookForMutator(m))
}