what's the difference between openshift route and k8s ingress? - kubernetes

Question

I'm new to openshift and k8s. I'm not sure what's the difference between these two terms, openshift route vs k8s ingress ?

Answer 1

Ultimately they are intended to achieve the same end. Originally Kubernetes had no such concept and so in OpenShift the concept of a Route was developed, along with the bits for providing a load balancing proxy etc. In time it was seen as being useful to have something like this in Kubernetes, so using Route from OpenShift as a starting point for what could be done, Ingress was developed for Kubernetes. In the Ingress version they went for a more generic rules based system so how you specify them looks different, but the intent is to effectively be able to do the same thing.

Answer 2

The following code implementation will create a route in OCP.
The OCP will consider the ingress as a route in the same way.
// build the ingress/route object
func (r *ReconcileMobileSecurityService) buildAppIngress(m *mobilesecurityservicev1alpha1.MobileSecurityService) *v1beta1.Ingress {
ls := getAppLabels(m.Name)
hostName := m.Name + "-" + m.Namespace + "." + m.Spec.ClusterHost + ".nip.io"
ing := &v1beta1.Ingress{
TypeMeta: v1.TypeMeta{
APIVersion: "extensions/v1beta1",
Kind: "Ingress",
},
ObjectMeta: v1.ObjectMeta{
Name: m.Name,
Namespace: m.Namespace,
Labels: ls,
},
Spec: v1beta1.IngressSpec{
Backend: &v1beta1.IngressBackend{
ServiceName: m.Name,
ServicePort: intstr.FromInt(int(m.Spec.Port)),
},
Rules: []v1beta1.IngressRule{
{
Host: hostName,
IngressRuleValue: v1beta1.IngressRuleValue{
HTTP: &v1beta1.HTTPIngressRuleValue{
Paths: []v1beta1.HTTPIngressPath{
{
Backend: v1beta1.IngressBackend{
ServiceName: m.Name,
ServicePort: intstr.FromInt(int(m.Spec.Port)),
},
Path: "/",
},
},
},
},
},
},
},
}
// Set MobileSecurityService instance as the owner and controller
controllerutil.SetControllerReference(m, ing, r.scheme)
return ing
}