Reconfigure postgres with kubectl apply command - postgresql

Question

I'm trying to change the settings of my postgres database inside my local minikube cluster. I mistakenly deployed a database without specifying the postgres user, password and database.
The problem: When I add the new env variables and use kubectl apply -f postgres-deployment.yml, postgres does not create the user, password or database that specified by the environment variables.
This is the deployment:
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgres-deployment
spec:
replicas: 1
selector:
matchLabels:
component: postgres
template:
metadata:
labels:
component: postgres
spec:
volumes:
- name: postgres-storage
persistentVolumeClaim:
claimName: database-persistent-volume-claim
containers:
- name: postgres
image: postgres
ports:
- containerPort: 5432
volumeMounts:
- name: postgres-storage
mountPath: /var/lib/postgresql/data
subPath: postgres
env:
- name: PGUSER
value: admin
- name: PGPASSWORD
value: password
- name: PGDATABSE
value: testdb
How can I change the settings of postgres when I apply the deployment file?

Answer 1

Can you share pod's logs?
kubectl logs <pod_name>
Postgres is using init script with defined variable names:
POSTGRES_USER
POSTGRES_PASSWORD
POSTGRES_DB
Try this one out
apiVersion: v1
kind: ReplicationController
metadata:
name: postgres
spec:
replicas: 1
template:
metadata:
labels:
app: postgres
spec:
containers:
- name: postgres
image: postgres:9.6
env:
- name: POSTGRES_USER
value: admin
- name: POSTGRES_PASSWORD
value: password
- name: POSTGRES_DB
value: testdb
- name: PGDATA
value: /var/lib/postgresql/data/pgdata
ports:
- containerPort: 5432
volumeMounts:
- mountPath: /var/lib/postgresql/data
name: pg-data
volumes:
- name: pg-data
emptyDir: {}