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ingress.go
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ingress.go
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// Copyright 2018-2019 Authors of Cilium
//
// 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 k8s
import (
"fmt"
"net"
"github.com/cilium/cilium/pkg/k8s/types"
"github.com/cilium/cilium/pkg/loadbalancer"
)
func supportV1beta1(ing *types.Ingress) bool {
// We only support Single Service Ingress for now which means
// ing.Spec.Backend needs to be different than nil.
return ing.Spec.Backend != nil
}
// ParseIngressID parses the service ID from the ingress resource
func ParseIngressID(svc *types.Ingress) ServiceID {
id := ServiceID{
Namespace: svc.ObjectMeta.Namespace,
}
if svc.Spec.Backend != nil {
id.Name = svc.Spec.Backend.ServiceName
}
return id
}
// ParseIngress parses an ingress resources and returns the Service definition
func ParseIngress(ingress *types.Ingress, host net.IP) (ServiceID, *Service, error) {
svcID := ParseIngressID(ingress)
if !supportV1beta1(ingress) {
return svcID, nil, fmt.Errorf("only Single Service Ingress is supported for now, ignoring Ingress")
}
ingressPort := ingress.Spec.Backend.ServicePort.IntValue()
if ingressPort == 0 {
return svcID, nil, fmt.Errorf("invalid port number")
}
svc := NewService(host, false, nil, nil)
portName := loadbalancer.FEPortName(ingress.Spec.Backend.ServiceName + "/" + ingress.Spec.Backend.ServicePort.String())
svc.Ports[portName] = loadbalancer.NewFEPort(loadbalancer.TCP, uint16(ingressPort))
return svcID, svc, nil
}