mirror of
https://github.com/projectcapsule/capsule.git
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116 lines
3.5 KiB
Go
116 lines
3.5 KiB
Go
// Copyright 2020-2023 Project Capsule Authors.
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// SPDX-License-Identifier: Apache-2.0
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package ingress
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import (
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"context"
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"net/http"
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corev1 "k8s.io/api/core/v1"
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k8serrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/util/version"
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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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capsulev1beta2 "github.com/projectcapsule/capsule/api/v1beta2"
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"github.com/projectcapsule/capsule/pkg/configuration"
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capsulewebhook "github.com/projectcapsule/capsule/pkg/webhook"
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"github.com/projectcapsule/capsule/pkg/webhook/utils"
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)
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type class struct {
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configuration configuration.Configuration
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version *version.Version
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}
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func Class(configuration configuration.Configuration, version *version.Version) capsulewebhook.Handler {
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return &class{
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configuration: configuration,
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version: version,
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}
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}
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func (r *class) 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 r.validate(ctx, r.version, client, req, decoder, recorder)
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}
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}
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func (r *class) 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 r.validate(ctx, r.version, client, req, decoder, recorder)
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}
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}
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func (r *class) OnDelete(client.Client, *admission.Decoder, 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 (r *class) validate(ctx context.Context, version *version.Version, client client.Client, req admission.Request, decoder *admission.Decoder, recorder record.EventRecorder) *admission.Response {
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ingress, err := FromRequest(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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var tnt *capsulev1beta2.Tenant
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tnt, err = TenantFromIngress(ctx, client, ingress)
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if err != nil {
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return utils.ErroredResponse(err)
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}
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if tnt == nil {
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return nil
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}
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allowed := tnt.Spec.IngressOptions.AllowedClasses
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if allowed == nil {
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return nil
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}
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ingressClass := ingress.IngressClass()
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if ingressClass == nil {
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recorder.Eventf(tnt, corev1.EventTypeWarning, "MissingIngressClass", "Ingress %s/%s is missing IngressClass", req.Namespace, req.Name)
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response := admission.Denied(NewIngressClassUndefined(*allowed).Error())
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return &response
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}
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selector := false
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// Verify if the IngressClass exists and matches the label selector/expression
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if len(allowed.MatchExpressions) > 0 || len(allowed.MatchLabels) > 0 {
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ingressClassObj, err := utils.GetIngressClassByName(ctx, version, client, ingressClass)
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if err != nil && !k8serrors.IsNotFound(err) {
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response := admission.Errored(http.StatusInternalServerError, err)
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return &response
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}
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// Ingress Class is present, check if it matches the selector
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if ingressClassObj != nil {
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selector = allowed.SelectorMatch(ingressClassObj)
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}
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}
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switch {
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case allowed.MatchDefault(*ingressClass):
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return nil
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case allowed.Match(*ingressClass) || selector:
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return nil
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default:
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recorder.Eventf(tnt, corev1.EventTypeWarning, "ForbiddenIngressClass", "Ingress %s/%s IngressClass %s is forbidden for the current Tenant", req.Namespace, req.Name, &ingressClass)
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response := admission.Denied(NewIngressClassForbidden(*ingressClass, *allowed).Error())
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return &response
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}
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}
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