mirror of
https://github.com/projectcapsule/capsule.git
synced 2026-08-23 22:46:59 +00:00
83 lines
2.6 KiB
Go
83 lines
2.6 KiB
Go
package ingress
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import (
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"context"
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"fmt"
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"strings"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/client-go/tools/record"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/controller-runtime/pkg/webhook/admission"
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capsulev1beta1 "github.com/clastix/capsule/api/v1beta1"
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capsulewebhook "github.com/clastix/capsule/pkg/webhook"
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"github.com/clastix/capsule/pkg/webhook/utils"
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)
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type wildcard struct {
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}
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func Wildcard() capsulewebhook.Handler {
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return &wildcard{}
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}
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func (h *wildcard) OnCreate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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return h.wildcardHandler(ctx, client, req, recorder, decoder)
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}
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}
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func (h *wildcard) OnDelete(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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return nil
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}
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}
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func (h *wildcard) OnUpdate(client client.Client, decoder *admission.Decoder, recorder record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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return h.wildcardHandler(ctx, client, req, recorder, decoder)
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}
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}
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func (h *wildcard) wildcardHandler(ctx context.Context, clt client.Client, req admission.Request, recorder record.EventRecorder, decoder *admission.Decoder) *admission.Response {
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tntList := &capsulev1beta1.TenantList{}
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if err := clt.List(ctx, tntList, client.MatchingFieldsSelector{
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Selector: fields.OneTermEqualSelector(".status.namespaces", req.Namespace),
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}); err != nil {
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return utils.ErroredResponse(err)
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}
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// resource is not inside a Tenant namespace
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if len(tntList.Items) == 0 {
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return nil
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}
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tnt := tntList.Items[0]
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// Check if Annotation in manifest has value "capsule.clastix.io/deny-wildcard" set to "true".
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if tnt.IsWildcardDenied() {
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// Retrieve ingress resource from request.
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ingress, err := ingressFromRequest(req, decoder)
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if err != nil {
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return utils.ErroredResponse(err)
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}
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// Loop over all the hosts present on the ingress.
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for host := range ingress.HostnamePathsPairs() {
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// Check if one of the host has wildcard.
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if strings.HasPrefix(host, "*") {
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// In case of wildcard, generate an event and then return.
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recorder.Eventf(&tnt, corev1.EventTypeWarning, "Wildcard denied", "%s %s/%s cannot be %s", req.Kind.String(), req.Namespace, req.Name, strings.ToLower(string(req.Operation)))
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response := admission.Denied(fmt.Sprintf("Wildcard denied for tenant %s\n", tnt.GetName()))
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return &response
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}
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}
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}
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return nil
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}
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