/
gatewayroute_mutator.go
105 lines (90 loc) · 3.8 KB
/
gatewayroute_mutator.go
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package appmesh
import (
"context"
"fmt"
appmesh "github.com/aws/aws-app-mesh-controller-for-k8s/apis/appmesh/v1beta2"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/mesh"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/virtualgateway"
"github.com/aws/aws-app-mesh-controller-for-k8s/pkg/webhook"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/runtime"
ctrl "sigs.k8s.io/controller-runtime"
"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
)
const apiPathMutateAppMeshGatewayRoute = "/mutate-appmesh-k8s-aws-v1beta2-gatewayroute"
// NewGatewayRouteMutator returns a mutator for GatewayRoute.
func NewGatewayRouteMutator(meshMembershipDesignator mesh.MembershipDesignator, virtualGatewayMembershipDesignator virtualgateway.MembershipDesignator) *gatewayRouteMutator {
return &gatewayRouteMutator{
meshMembershipDesignator: meshMembershipDesignator,
virtualGatewayMembershipDesignator: virtualGatewayMembershipDesignator,
}
}
var _ webhook.Mutator = &gatewayRouteMutator{}
type gatewayRouteMutator struct {
meshMembershipDesignator mesh.MembershipDesignator
virtualGatewayMembershipDesignator virtualgateway.MembershipDesignator
}
func (m *gatewayRouteMutator) Prototype(req admission.Request) (runtime.Object, error) {
return &appmesh.GatewayRoute{}, nil
}
func (m *gatewayRouteMutator) MutateCreate(ctx context.Context, obj runtime.Object) (runtime.Object, error) {
gr := obj.(*appmesh.GatewayRoute)
ms, err := m.designateMeshMembership(ctx, gr)
if err != nil {
return nil, err
}
vg, err := m.designateVirtualGatewayMembership(ctx, gr)
if err != nil {
return nil, err
}
if vg.Spec.MeshRef == nil || !mesh.IsMeshReferenced(ms, *vg.Spec.MeshRef) {
return nil, errors.Errorf("virtualGateway referenced does not belong to the mesh referenced in GatewayRoute Create")
}
if err := m.defaultingAWSName(gr); err != nil {
return nil, err
}
return gr, nil
}
func (m *gatewayRouteMutator) MutateUpdate(ctx context.Context, obj runtime.Object, oldObj runtime.Object) (runtime.Object, error) {
return obj, nil
}
func (m *gatewayRouteMutator) defaultingAWSName(gr *appmesh.GatewayRoute) error {
if gr.Spec.AWSName == nil || len(*gr.Spec.AWSName) == 0 {
awsName := fmt.Sprintf("%s_%s", gr.Name, gr.Namespace)
gr.Spec.AWSName = &awsName
}
return nil
}
func (m *gatewayRouteMutator) designateMeshMembership(ctx context.Context, gr *appmesh.GatewayRoute) (*appmesh.Mesh, error) {
if gr.Spec.MeshRef != nil {
return nil, errors.Errorf("%s create may not specify read-only field: %s", "GatewayRoute", "spec.meshRef")
}
mesh, err := m.meshMembershipDesignator.Designate(ctx, gr)
if err != nil {
return nil, err
}
gr.Spec.MeshRef = &appmesh.MeshReference{
Name: mesh.Name,
UID: mesh.UID,
}
return mesh, nil
}
func (m *gatewayRouteMutator) designateVirtualGatewayMembership(ctx context.Context, gr *appmesh.GatewayRoute) (*appmesh.VirtualGateway, error) {
if gr.Spec.VirtualGatewayRef != nil {
return nil, errors.Errorf("%s create may not specify read-only field: %s", "GatewayRoute", "spec.virtualGatewayRef")
}
virtualGateway, err := m.virtualGatewayMembershipDesignator.DesignateForGatewayRoute(ctx, gr)
if err != nil {
return nil, err
}
gr.Spec.VirtualGatewayRef = &appmesh.VirtualGatewayReference{
Namespace: &virtualGateway.Namespace,
Name: virtualGateway.Name,
UID: virtualGateway.UID,
}
return virtualGateway, nil
}
// +kubebuilder:webhook:path=/mutate-appmesh-k8s-aws-v1beta2-gatewayroute,mutating=true,failurePolicy=fail,groups=appmesh.k8s.aws,resources=gatewayroutes,verbs=create;update,versions=v1beta2,name=mgatewayroute.appmesh.k8s.aws,sideEffects=None,webhookVersions=v1beta1
func (m *gatewayRouteMutator) SetupWithManager(mgr ctrl.Manager) {
mgr.GetWebhookServer().Register(apiPathMutateAppMeshGatewayRoute, webhook.MutatingWebhookForMutator(m))
}