No endpoint set for postgres-service - postgresql

Question

I'm having a problem getting an endpoint for my postgres-service. I've checked the selector and it does seem to match the pod name, but I've posted both yamls below.
I've tried resetting Minikube and following the Kubernetes debugging instructions, but no luck.
Can anyone spot where I'm going wrong? Thanks!
postgres-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgres
spec:
replicas: 1
selector:
matchLabels:
app: postgres
template:
metadata:
labels:
app: postgres
spec:
containers:
- name: postgres
image: postgres:10.1
ports:
- containerPort: 5432
env:
- name: POSTGRES_DB
value: db0
- name: POSTGRES_USER
value: somevalue
- name: POSTGRES_PASSWORD
value: somevalue
volumeMounts:
- mountPath: "/var/lib/postgresql/data"
name: "somevalue-pgdata"
volumes:
- hostPath:
path: "/home/docker/pgdata"
name: somevalue-pgdata
And then my postgres-service.yaml:
apiVersion: v1
kind: Service
metadata:
name: postgres-service
spec:
type: ClusterIP
ports:
- port: 5432
selector:
service: postgres
And showing my services, and no endpoint:
$ kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 46m
postgres-service ClusterIP 10.97.4.3 <none> 5432/TCP 3s
$ kubectl get endpoints postgres-service
NAME ENDPOINTS AGE
postgres-service <none> 8s

Answer 1

Resolved - modified service.yaml to point to app instead of service. For anyone else, this is the working version:
apiVersion: v1
kind: Service
metadata:
name: postgres-service
spec:
type: ClusterIP
ports:
- port: 5432
selector:
app: postgres