Keycloak with postgres on minikube: cannot connect to database - postgresql

Question

I have one pod with postgres and one pod with keycloak on minikube.
The pod with keycloak deployed via an helm chart from codecentric (chart version 17.0.1, application version 16.1.1) is failing to initialize.
I have inspected the logs and it is failing to connect to the database:
FATAL [org.keycloak.services] (ServerService Thread Pool -- 64) Error during startup: java.lang.RuntimeException: Failed to connect to database
...
Caused by: org.postgresql.util.PSQLException: Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
values.yml used to deploy the helm chart
postgresql:
enabled: false
extraEnv: |
- name: DB_VENDOR
value: postgres
- name: DB_ADDR
value: "127.0.0.1"
- name: DB_PORT
value: "5432"
- name: DB_DATABASE
value: keycloak
- name: DB_USER
value: keycloak
- name: DB_PASSWORD
value: keycloak
- name: KEYCLOAK_USER
value: "admin"
- name: KEYCLOAK_PASSWORD
value: "admin"
- name: PROXY_ADDRESS_FORWARDING
value: "true"
- name: JDBC_PARAMS
value: "connectTimeout=30000"
Files used to deploy the postgresql pod:
postgres-configmap.yml:
apiVersion: v1
kind: ConfigMap
metadata:
name: postgres-config-old
labels:
app: postgres-old
data:
POSTGRES_DB: keycloak
POSTGRES_USER: keycloak
POSTGRES_PASSWORD: keycloak
postgres-deployment.yml:
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgres-old
spec:
replicas: 1
selector:
matchLabels:
app: postgres-old
template:
metadata:
labels:
app: postgres-old
spec:
containers:
- name: postgres-old
image: docker.io/library/postgres:14.4
imagePullPolicy: "IfNotPresent"
ports:
- containerPort: 5432
envFrom:
- configMapRef:
name: postgres-config-old
volumeMounts:
- mountPath: /var/lib/postgresql/14/data
name: postgredb-old
volumes:
- name: postgredb-old
persistentVolumeClaim:
claimName: postgres-pv-claim-old
postgres-service.yml:
apiVersion: v1
kind: Service
metadata:
name: postgres-old
labels:
app: postgres-old
spec:
type: NodePort
ports:
- port: 5432
selector:
app: postgres-old
postgres-storage.yml:
kind: PersistentVolume
apiVersion: v1
metadata:
name: postgres-pv-volume-old
labels:
type: local
app: postgres-old
spec:
storageClassName: manual
capacity:
storage: 5Gi
accessModes:
- ReadWriteMany
hostPath:
path: "/mnt/data"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: postgres-pv-claim-old
labels:
app: postgres-old
spec:
storageClassName: manual
accessModes:
- ReadWriteMany
resources:
requests:
storage: 5Gi
I've also tried to expose an external port with:
minikube service postgres-old --url
and add this port on values.yml instead of 5432 but with no luck.
I am running minikube on wsl2.