mirror of
https://github.com/projectcapsule/capsule.git
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87 lines
2.9 KiB
Go
87 lines
2.9 KiB
Go
// Copyright 2020-2021 Clastix Labs
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// SPDX-License-Identifier: Apache-2.0
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package tenant
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import (
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"context"
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"fmt"
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"net/http"
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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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"github.com/clastix/capsule/pkg/configuration"
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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 hostnamesCollisionHandler struct {
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configuration configuration.Configuration
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}
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func HostnamesCollisionHandler(configuration configuration.Configuration) capsulewebhook.Handler {
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return &hostnamesCollisionHandler{configuration: configuration}
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}
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func (h *hostnamesCollisionHandler) validateTenant(ctx context.Context, req admission.Request, clt client.Client, decoder *admission.Decoder) *admission.Response {
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tenant := &capsulev1beta1.Tenant{}
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if err := decoder.Decode(req, tenant); err != nil {
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return utils.ErroredResponse(err)
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}
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if !h.configuration.AllowTenantIngressHostnamesCollision() && tenant.Spec.IngressHostnames != nil && len(tenant.Spec.IngressHostnames.Exact) > 0 {
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for _, h := range tenant.Spec.IngressHostnames.Exact {
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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(".spec.ingressHostnames", h),
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}); err != nil {
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response := admission.Errored(http.StatusInternalServerError, fmt.Errorf("cannot retrieve Tenant list using .spec.ingressHostnames field selector: %w", err))
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return &response
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}
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switch {
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case len(tntList.Items) == 1 && tntList.Items[0].GetName() == tenant.GetName():
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continue
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case len(tntList.Items) > 0:
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response := admission.Denied(fmt.Sprintf("the allowed hostname %s is already used by the Tenant %s, cannot proceed", h, tntList.Items[0].GetName()))
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return &response
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default:
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continue
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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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func (h *hostnamesCollisionHandler) OnCreate(client client.Client, decoder *admission.Decoder, _ record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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if response := h.validateTenant(ctx, req, client, decoder); response != nil {
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return response
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}
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return nil
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}
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}
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func (h *hostnamesCollisionHandler) OnDelete(client.Client, *admission.Decoder, record.EventRecorder) capsulewebhook.Func {
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return func(context.Context, admission.Request) *admission.Response {
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return nil
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}
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}
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func (h *hostnamesCollisionHandler) OnUpdate(client client.Client, decoder *admission.Decoder, _ record.EventRecorder) capsulewebhook.Func {
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return func(ctx context.Context, req admission.Request) *admission.Response {
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if response := h.validateTenant(ctx, req, client, decoder); response != nil {
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return response
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}
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return nil
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}
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}
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