Minikube unable to expose service with yaml - kubernetes

Question

Trying to run a local registry. I have the following configuration:
Deployment:
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: registry
labels:
app: registry
role: registry
spec:
replicas: 1
selector:
matchLabels:
app: registry
template:
metadata:
labels:
app: registry
spec:
containers:
- name: registry
image: registry:latest
ports:
- containerPort: 5000
volumeMounts:
- mountPath: '/registry'
name: registry-volume
volumes:
- name: registry-volume
hostPath:
path: '/data'
type: Directory
Service:
apiVersion: v1
kind: Service
metadata:
name: registry
namespace: default
labels:
app: registry
spec:
selector:
role: registry
type: NodePort
ports:
- name: registry
nodePort: 31001
port: 5000
protocol: TCP
It all works well when I create deployment/service. kubectl shows status as Running for both service and deployment:
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/registry 1 1 1 1 30m
NAME DESIRED CURRENT READY AGE
rs/registry-6549cbc974 1 1 1 30m
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deploy/registry 1 1 1 1 30m
NAME DESIRED CURRENT READY AGE
rs/registry-6549cbc974 1 1 1 30m
NAME READY STATUS RESTARTS AGE
po/registry-6549cbc974-mmqpj 1/1 Running 0 30m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
svc/kubernetes ClusterIP 10.0.0.1 <none> 443/TCP 37m
svc/registry NodePort 10.0.0.6 <none> 5000:31001/TCP 7m
However, when I try to get external IP for service using: minikube service registry --url, it times-out/fails: Waiting, endpoint for service is not ready yet....
When I delete the service (keeping deployment intact), and manually expose the deployment using kubectl expose deployment registry --type=NodePort, I am able to get it working.
Minikube log can be found here.

Answer 1

You need to specify the correct spec.selector in registry service manifest:
apiVersion: v1
kind: Service
metadata:
name: registry
namespace: default
labels:
app: registry
spec:
selector:
app: registry
type: NodePort
ports:
- name: registry
nodePort: 31001
port: 5000
protocol: TCP
Now registry service correctly points to the registry pod:
$ kubectl get endpoints
NAME ENDPOINTS AGE
kubernetes 10.0.2.15:8443 14m
registry 172.17.0.4:5000 4s
And you can get external url as well:
$ minikube service registry --url
http://192.168.99.106:31001