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forked from knative/eventing
/
service.go
79 lines (71 loc) · 2.23 KB
/
service.go
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package resources
import (
"fmt"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"knative.dev/eventing/pkg/apis/messaging/v1alpha1"
"knative.dev/eventing/pkg/utils"
"knative.dev/pkg/kmeta"
)
const (
PortName = "http"
PortNumber = 80
MessagingRoleLabel = "messaging.knative.dev/role"
MessagingRole = "in-memory-channel"
)
// ServiceOption can be used to optionally modify the K8s service in CreateK8sService
type K8sServiceOption func(*corev1.Service) error
func CreateExternalServiceAddress(namespace, service string) string {
return fmt.Sprintf("%s.%s.svc.%s", service, namespace, utils.GetClusterDomainName())
}
func CreateChannelServiceName(name string) string {
return fmt.Sprintf("%s-kn-channel", name)
}
// ExternalService is a functional option for CreateK8sService to create a K8s service of type ExternalName
// pointing to the specified service in a namespace.
func ExternalService(namespace, service string) K8sServiceOption {
return func(svc *corev1.Service) error {
svc.Spec = corev1.ServiceSpec{
Type: corev1.ServiceTypeExternalName,
ExternalName: CreateExternalServiceAddress(namespace, service),
}
return nil
}
}
// NewK8sService creates a new Service for a Channel resource. It also sets the appropriate
// OwnerReferences on the resource so handleObject can discover the Channel resource that 'owns' it.
// As well as being garbage collected when the Channel is deleted.
func NewK8sService(imc *v1alpha1.InMemoryChannel, opts ...K8sServiceOption) (*corev1.Service, error) {
// Add annotations
svc := &corev1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Name: CreateChannelServiceName(imc.ObjectMeta.Name),
Namespace: imc.Namespace,
Labels: map[string]string{
MessagingRoleLabel: MessagingRole,
},
OwnerReferences: []metav1.OwnerReference{
*kmeta.NewControllerRef(imc),
},
},
Spec: corev1.ServiceSpec{
Ports: []corev1.ServicePort{
{
Name: PortName,
Protocol: corev1.ProtocolTCP,
Port: PortNumber,
},
},
},
}
for _, opt := range opts {
if err := opt(svc); err != nil {
return nil, err
}
}
return svc, nil
}