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| 1 | +// Licensed to the Apache Software Foundation (ASF) under one or more |
| 2 | +// contributor license agreements. See the NOTICE file distributed with |
| 3 | +// this work for additional information regarding copyright ownership. |
| 4 | +// The ASF licenses this file to You under the Apache License, Version 2.0 |
| 5 | +// (the "License"); you may not use this file except in compliance with |
| 6 | +// the License. You may obtain a copy of the License at |
| 7 | +// |
| 8 | +// http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | +// |
| 10 | +// Unless required by applicable law or agreed to in writing, software |
| 11 | +// distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | +// See the License for the specific language governing permissions and |
| 14 | +// limitations under the License. |
| 15 | + |
| 16 | +package v1 |
| 17 | + |
| 18 | +import ( |
| 19 | + "context" |
| 20 | + "fmt" |
| 21 | + |
| 22 | + corev1 "k8s.io/api/core/v1" |
| 23 | + "k8s.io/apimachinery/pkg/runtime" |
| 24 | + "k8s.io/apimachinery/pkg/types" |
| 25 | + ctrl "sigs.k8s.io/controller-runtime" |
| 26 | + "sigs.k8s.io/controller-runtime/pkg/client" |
| 27 | + logf "sigs.k8s.io/controller-runtime/pkg/log" |
| 28 | + "sigs.k8s.io/controller-runtime/pkg/webhook" |
| 29 | + "sigs.k8s.io/controller-runtime/pkg/webhook/admission" |
| 30 | + gatewaynetworkingk8siov1 "sigs.k8s.io/gateway-api/apis/v1" |
| 31 | + |
| 32 | + internaltypes "github.com/apache/apisix-ingress-controller/internal/types" |
| 33 | + "github.com/apache/apisix-ingress-controller/internal/webhook/v1/reference" |
| 34 | +) |
| 35 | + |
| 36 | +var grpcRouteLog = logf.Log.WithName("grpcroute-resource") |
| 37 | + |
| 38 | +func SetupGRPCRouteWebhookWithManager(mgr ctrl.Manager) error { |
| 39 | + return ctrl.NewWebhookManagedBy(mgr). |
| 40 | + For(&gatewaynetworkingk8siov1.GRPCRoute{}). |
| 41 | + WithValidator(NewGRPCRouteCustomValidator(mgr.GetClient())). |
| 42 | + Complete() |
| 43 | +} |
| 44 | + |
| 45 | +// +kubebuilder:webhook:path=/validate-gateway-networking-k8s-io-v1-grpcroute,mutating=false,failurePolicy=fail,sideEffects=None,groups=gateway.networking.k8s.io,resources=grpcroutes,verbs=create;update,versions=v1,name=vgrpcroute-v1.kb.io,admissionReviewVersions=v1 |
| 46 | + |
| 47 | +type GRPCRouteCustomValidator struct { |
| 48 | + Client client.Client |
| 49 | + checker reference.Checker |
| 50 | +} |
| 51 | + |
| 52 | +var _ webhook.CustomValidator = &GRPCRouteCustomValidator{} |
| 53 | + |
| 54 | +func NewGRPCRouteCustomValidator(c client.Client) *GRPCRouteCustomValidator { |
| 55 | + return &GRPCRouteCustomValidator{ |
| 56 | + Client: c, |
| 57 | + checker: reference.NewChecker(c, grpcRouteLog), |
| 58 | + } |
| 59 | +} |
| 60 | + |
| 61 | +func (v *GRPCRouteCustomValidator) ValidateCreate(ctx context.Context, obj runtime.Object) (admission.Warnings, error) { |
| 62 | + route, ok := obj.(*gatewaynetworkingk8siov1.GRPCRoute) |
| 63 | + if !ok { |
| 64 | + return nil, fmt.Errorf("expected a GRPCRoute object but got %T", obj) |
| 65 | + } |
| 66 | + grpcRouteLog.Info("Validation for GRPCRoute upon creation", "name", route.GetName(), "namespace", route.GetNamespace()) |
| 67 | + |
| 68 | + return v.collectWarnings(ctx, route), nil |
| 69 | +} |
| 70 | + |
| 71 | +func (v *GRPCRouteCustomValidator) ValidateUpdate(ctx context.Context, oldObj, newObj runtime.Object) (admission.Warnings, error) { |
| 72 | + route, ok := newObj.(*gatewaynetworkingk8siov1.GRPCRoute) |
| 73 | + if !ok { |
| 74 | + return nil, fmt.Errorf("expected a GRPCRoute object for the newObj but got %T", newObj) |
| 75 | + } |
| 76 | + grpcRouteLog.Info("Validation for GRPCRoute upon update", "name", route.GetName(), "namespace", route.GetNamespace()) |
| 77 | + |
| 78 | + return v.collectWarnings(ctx, route), nil |
| 79 | +} |
| 80 | + |
| 81 | +func (*GRPCRouteCustomValidator) ValidateDelete(context.Context, runtime.Object) (admission.Warnings, error) { |
| 82 | + return nil, nil |
| 83 | +} |
| 84 | + |
| 85 | +func (v *GRPCRouteCustomValidator) collectWarnings(ctx context.Context, route *gatewaynetworkingk8siov1.GRPCRoute) admission.Warnings { |
| 86 | + serviceVisited := make(map[types.NamespacedName]struct{}) |
| 87 | + namespace := route.GetNamespace() |
| 88 | + |
| 89 | + var warnings admission.Warnings |
| 90 | + |
| 91 | + addServiceWarning := func(nn types.NamespacedName) { |
| 92 | + if nn.Name == "" || nn.Namespace == "" { |
| 93 | + return |
| 94 | + } |
| 95 | + if _, seen := serviceVisited[nn]; seen { |
| 96 | + return |
| 97 | + } |
| 98 | + serviceVisited[nn] = struct{}{} |
| 99 | + warnings = append(warnings, v.checker.Service(ctx, reference.ServiceRef{ |
| 100 | + Object: route, |
| 101 | + NamespacedName: nn, |
| 102 | + })...) |
| 103 | + } |
| 104 | + |
| 105 | + addBackendRef := func(ns string, name string, group *gatewaynetworkingk8siov1.Group, kind *gatewaynetworkingk8siov1.Kind) { |
| 106 | + if name == "" { |
| 107 | + return |
| 108 | + } |
| 109 | + if group != nil && string(*group) != corev1.GroupName { |
| 110 | + return |
| 111 | + } |
| 112 | + if kind != nil && *kind != internaltypes.KindService { |
| 113 | + return |
| 114 | + } |
| 115 | + nn := types.NamespacedName{Namespace: ns, Name: name} |
| 116 | + addServiceWarning(nn) |
| 117 | + } |
| 118 | + |
| 119 | + processFilters := func(filters []gatewaynetworkingk8siov1.GRPCRouteFilter) { |
| 120 | + for _, filter := range filters { |
| 121 | + if filter.RequestMirror != nil { |
| 122 | + targetNamespace := namespace |
| 123 | + if filter.RequestMirror.BackendRef.Namespace != nil && *filter.RequestMirror.BackendRef.Namespace != "" { |
| 124 | + targetNamespace = string(*filter.RequestMirror.BackendRef.Namespace) |
| 125 | + } |
| 126 | + addBackendRef(targetNamespace, string(filter.RequestMirror.BackendRef.Name), |
| 127 | + filter.RequestMirror.BackendRef.Group, filter.RequestMirror.BackendRef.Kind) |
| 128 | + } |
| 129 | + } |
| 130 | + } |
| 131 | + |
| 132 | + for _, rule := range route.Spec.Rules { |
| 133 | + for _, backend := range rule.BackendRefs { |
| 134 | + targetNamespace := namespace |
| 135 | + if backend.Namespace != nil && *backend.Namespace != "" { |
| 136 | + targetNamespace = string(*backend.Namespace) |
| 137 | + } |
| 138 | + addBackendRef(targetNamespace, string(backend.Name), backend.Group, backend.Kind) |
| 139 | + processFilters(backend.Filters) |
| 140 | + } |
| 141 | + |
| 142 | + processFilters(rule.Filters) |
| 143 | + } |
| 144 | + |
| 145 | + return warnings |
| 146 | +} |
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