Kubernetes: port-forwarding automatically for services - ruby-on-rails

Question

I have a rails project that using postgres database. I want to build a database server using Kubernetes and rails server will connect to this database.
For example here is my defined postgres.yml
apiVersion: v1
kind: Service
metadata:
name: postgres
spec:
selector:
app: postgres
ports:
- name: "5432"
port: 5432
targetPort: 5432
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: postgres
spec:
replicas: 1
strategy:
type: Recreate
template:
metadata:
labels:
app: mysql
spec:
containers:
- env:
- name: POSTGRES_DB
value: hades_dev
- name: POSTGRES_PASSWORD
value: "1234"
name: postgres
image: postgres:latest
ports:
- containerPort: 5432
resources: {}
stdin: true
tty: true
volumeMounts:
- mountPath: /var/lib/postgresql/data/
name: database-hades-volume
restartPolicy: Always
volumes:
- name: database-hades-volume
persistentVolumeClaim:
claimName: database-hades-volume
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: database-hades-volume
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 100Mi
I run this by following commands: kubectl run -f postgres.yml.
But when I try to run rails server. I always meet following exception:
PG::Error
invalid encoding name: utf8
I try to forwarding port, and rails server successfully connects to database server:
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
postgres-3681891707-8ch4l 1/1 Running 0 1m
Then run following command:
kubectl port-forward postgres-3681891707-8ch4l 5432:5432
I think this solution not good. How can I define in my postgres.yml so I don't need to port-forwarding manually as above.
Thanks

Answer 1

You can try by exposing your service on NodePort and then accessing the service on that port.
Check here https://kubernetes.io/docs/concepts/services-networking/service/#type-nodeport