forked from kyma-project/kyma
/
ingressv1.go
141 lines (113 loc) · 3.73 KB
/
ingressv1.go
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package v1
import (
"fmt"
"reflect"
kymaMeta "github.com/kyma-project/kyma/components/api-controller/pkg/apis/gateway.kyma.cx/meta/v1"
k8sApiExtensions "k8s.io/api/extensions/v1beta1"
apiErrors "k8s.io/apimachinery/pkg/api/errors"
k8sMeta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
"k8s.io/apimachinery/pkg/util/runtime"
k8s "k8s.io/client-go/kubernetes"
)
type ingress struct {
kubeClient k8s.Interface
}
// New returns initialized controller for ingresses
func New(kubeClient k8s.Interface) Interface {
return &ingress{
kubeClient: kubeClient,
}
}
func (i *ingress) Get(dto *Dto) (k8sApiExtensions.Ingress, error) {
ingName := ingressNameFrom(dto)
ing, err := i.kubeClient.ExtensionsV1beta1().Ingresses(dto.MetaDto.Namespace).Get(ingName, k8sMeta.GetOptions{})
return *ing, err
}
func (i *ingress) Create(dto *Dto) (*kymaMeta.GatewayResource, error) {
ing := ingressFrom(dto)
createdIng, err := i.kubeClient.ExtensionsV1beta1().Ingresses(dto.MetaDto.Namespace).Create(&ing)
if err != nil {
runtime.HandleError(fmt.Errorf("failed to create Ingress '%s' in namespace %s", ing.Name, dto.MetaDto.Namespace))
return nil, err
}
return gatewayResourceFrom(createdIng), nil
}
func (i *ingress) Update(oldDto, newDto *Dto) (*kymaMeta.GatewayResource, error) {
newIng := ingressFrom(newDto)
oldIng := ingressFrom(oldDto)
var err error
var updatedIng *k8sApiExtensions.Ingress
if newIng.Name != oldIng.Name {
err := i.Delete(oldDto)
if err != nil {
return nil, fmt.Errorf("error while deleting old ingress. Root cause: %v", err)
}
createdIng, err := i.Create(newDto)
if err != nil {
return nil, fmt.Errorf("error while creating new ingress. Root cause: %v", err)
}
return createdIng, nil
} else if !reflect.DeepEqual(newIng.Spec, oldIng.Spec) {
updatedIng, err = i.kubeClient.ExtensionsV1beta1().Ingresses(newDto.MetaDto.Namespace).Update(&newIng)
if err != nil {
runtime.HandleError(fmt.Errorf("could not update Ingress '%s' in namespace '%s'. Details : %s", newIng.Name, newIng.Namespace, err.Error()))
return nil, err
}
return gatewayResourceFrom(updatedIng), nil
}
// if there were no changes in ingress
return nil, nil
}
func (i *ingress) Delete(dto *Dto) error {
err := i.kubeClient.ExtensionsV1beta1().Ingresses(dto.MetaDto.Namespace).Delete(ingressNameFrom(dto), &k8sMeta.DeleteOptions{})
if err != nil && !apiErrors.IsNotFound(err) {
runtime.HandleError(fmt.Errorf("could not delete Ingress '%s' in namespace '%s'. Details : %s", dto.MetaDto.Name, dto.MetaDto.Namespace, err.Error()))
}
return err
}
func ingressNameFrom(dto *Dto) string {
return dto.ServiceName + "-ing"
}
func ingressFrom(dto *Dto) k8sApiExtensions.Ingress {
ing := k8sApiExtensions.Ingress{}
ing.Labels = dto.MetaDto.Labels
annotations := make(map[string]string)
annotations["kubernetes.io/ingress.class"] = "istio"
ing.Annotations = annotations
ing.APIVersion = "v1"
ing.Name = ingressNameFrom(dto)
ing.Spec = k8sApiExtensions.IngressSpec{
TLS: []k8sApiExtensions.IngressTLS{
{
SecretName: "istio-ingress-certs",
},
},
Rules: []k8sApiExtensions.IngressRule{
{
Host: dto.Hostname,
IngressRuleValue: k8sApiExtensions.IngressRuleValue{
HTTP: &k8sApiExtensions.HTTPIngressRuleValue{
Paths: []k8sApiExtensions.HTTPIngressPath{
{
Path: "/.*",
Backend: k8sApiExtensions.IngressBackend{
ServiceName: dto.ServiceName,
ServicePort: intstr.FromInt(dto.ServicePort),
},
},
},
},
},
},
},
}
return ing
}
func gatewayResourceFrom(api *k8sApiExtensions.Ingress) *kymaMeta.GatewayResource {
return &kymaMeta.GatewayResource{
Name: api.Name,
Uid: api.UID,
Version: api.ResourceVersion,
}
}