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Refactor ingress-nginx conversion logic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| /* | ||
| Copyright 2022 The Kubernetes Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package common | ||
|
|
||
| import ( | ||
| "fmt" | ||
| networkingv1 "k8s.io/api/networking/v1" | ||
| networkingv1beta1 "k8s.io/api/networking/v1beta1" | ||
| "k8s.io/apimachinery/pkg/util/validation/field" | ||
| "regexp" | ||
| gatewayv1beta1 "sigs.k8s.io/gateway-api/apis/v1beta1" | ||
| ) | ||
|
|
||
| func GetIngressClass(ingress networkingv1.Ingress) string { | ||
| var ingressClass string | ||
|
|
||
| if ingress.Spec.IngressClassName != nil && *ingress.Spec.IngressClassName != "" { | ||
| ingressClass = *ingress.Spec.IngressClassName | ||
| } else if _, ok := ingress.Annotations[networkingv1beta1.AnnotationIngressClass]; ok { | ||
| ingressClass = ingress.Annotations[networkingv1beta1.AnnotationIngressClass] | ||
| } else { | ||
| ingressClass = ingress.Name | ||
| } | ||
|
|
||
| return ingressClass | ||
| } | ||
|
|
||
| type IngressRuleGroup struct { | ||
| Namespace string | ||
| IngressClass string | ||
| Host string | ||
| TLS []networkingv1.IngressTLS | ||
| Rules []Rule | ||
| } | ||
|
|
||
| type Rule struct { | ||
| Ingress networkingv1.Ingress | ||
| IngressRule networkingv1.IngressRule | ||
| } | ||
|
|
||
| func GetRuleGroups(ingresses []networkingv1.Ingress) map[string]IngressRuleGroup { | ||
| ruleGroups := make(map[string]IngressRuleGroup) | ||
|
|
||
| for _, ingress := range ingresses { | ||
| ingressClass := GetIngressClass(ingress) | ||
|
|
||
| for _, rule := range ingress.Spec.Rules { | ||
|
|
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| rgKey := fmt.Sprintf("%s/%s/%s", ingress.Namespace, ingressClass, rule.Host) | ||
| rg, ok := ruleGroups[rgKey] | ||
| if !ok { | ||
| rg = IngressRuleGroup{ | ||
| Namespace: ingress.Namespace, | ||
| IngressClass: ingressClass, | ||
| Host: rule.Host, | ||
| } | ||
| ruleGroups[rgKey] = rg | ||
| } | ||
| rg.TLS = append(rg.TLS, ingress.Spec.TLS...) | ||
| rg.Rules = append(rg.Rules, Rule{ | ||
| Ingress: ingress, | ||
| IngressRule: rule, | ||
| }) | ||
|
|
||
| ruleGroups[rgKey] = rg | ||
| } | ||
|
|
||
| } | ||
|
|
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| return ruleGroups | ||
| } | ||
|
|
||
| func NameFromHost(host string) string { | ||
| // replace all special chars with - | ||
| reg, _ := regexp.Compile("[^a-zA-Z0-9]+") | ||
| step1 := reg.ReplaceAllString(host, "-") | ||
| // remove all - at start of string | ||
| reg2, _ := regexp.Compile("^[^a-zA-Z0-9]+") | ||
| step2 := reg2.ReplaceAllString(step1, "") | ||
| // if nothing left, return "all-hosts" | ||
| if len(host) == 0 { | ||
| return "all-hosts" | ||
| } | ||
| return step2 | ||
| } | ||
|
|
||
| func ToBackendRef(ib networkingv1.IngressBackend, path *field.Path) (*gatewayv1beta1.BackendRef, *field.Error) { | ||
| if ib.Service != nil { | ||
| if ib.Service.Port.Name != "" { | ||
| fieldPath := path.Child("service", "port") | ||
| return nil, field.Invalid(fieldPath, "name", fmt.Sprintf("named ports not supported: %s", ib.Service.Port.Name)) | ||
| } | ||
| return &gatewayv1beta1.BackendRef{ | ||
| BackendObjectReference: gatewayv1beta1.BackendObjectReference{ | ||
| Name: gatewayv1beta1.ObjectName(ib.Service.Name), | ||
| Port: (*gatewayv1beta1.PortNumber)(&ib.Service.Port.Number), | ||
| }, | ||
| }, nil | ||
| } | ||
| return &gatewayv1beta1.BackendRef{ | ||
| BackendObjectReference: gatewayv1beta1.BackendObjectReference{ | ||
| Group: (*gatewayv1beta1.Group)(ib.Resource.APIGroup), | ||
| Kind: (*gatewayv1beta1.Kind)(&ib.Resource.Kind), | ||
| Name: gatewayv1beta1.ObjectName(ib.Resource.Name), | ||
| }, | ||
| }, nil | ||
| } |
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