I have a simple ingress network, I want to access services at different namespaces, from this ingress network.
How I can do this? My ingress network yaml file:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: ingress
spec:
rules:
- host: api.myhost.com
http:
paths:
- backend:
serviceName: bookapi-2
servicePort: 8080
path: /booking-service/I've set the ExternalNames service type to the yaml file:
apiVersion: v1
kind: Service
metadata:
name: bookapi-2
namespace: booking-namespace
spec:
type: ExternalName
externalName: bookapi-2
ports:
- name: app
protocol: TCP
port: 8080
targetPort: 8080
selector:
app: bookapi-2
tier: backend-2An ExternalName service is a special case of service that does not have selectors and uses DNS names instead.
You can find out more about ExternalName service from the official Kubernetes documentation:
When you want to access a service from a different namespace, your yaml could, for example, look like this:
kind: Service
apiVersion: v1
metadata:
name: test-service-1
namespace: namespace-a
spec:
type: ExternalName
externalName: test-service-2.namespace-b.svc.cluster.local
ports:
- port: 80As to your Ingress yaml file, please recheck it and make sure it is compliant with the official examples, for example this one as it contains some inconsistency:
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-ingress
spec:
rules:
- host: www.mysite.com
http:
paths:
- backend:
serviceName: website
servicePort: 80
- host: forums.mysite.com
http:
paths:
- path:
backend:
serviceName: forums
servicePort: 80Please also recheck ExternalName yaml as it has TargetPorts and selectors which are not used in this type of Service and make sure that:
ExternalName Services are available only with
kube-dnsversion 1.7 and later.
In case you will not succeed, please share the kind of problem you have meet.