Error in setting up PostgreSQL in Kubernates - postgresql

Question

I'm trying to setup postgres in my Kubernates enabled Docker Desktop. I pulled images 'postgres:latest' and 'dpage/pgadmin4:latest' from Docker Hub. Below are my yaml files. Everything starts perfectly. I can open the pgAdmin page from Chrome. The creds i have given in the yaml file are not logging me in.
What is causing this issue?
postgres Db:-
apiVersion: v1
kind: ConfigMap
metadata:
name: postgres-config
labels:
app: postgres
data:
POSTGRES_DB: app
POSTGRES_USER: postgres
POSTGRES_PASSWORD: password
---
kind: PersistentVolume
apiVersion: v1
metadata:
name: postgres-pv-volume
labels:
type: local
app: postgres
spec:
storageClassName: manual
capacity:
storage: 5Gi
accessModes:
- ReadWriteMany
hostPath:
path: "/mnt/data"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
name: postgres-pv-claim
labels:
app: postgres
spec:
storageClassName: manual
accessModes:
- ReadWriteMany
resources:
requests:
storage: 5Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgres
labels:
app: postgres
spec:
replicas: 1
selector:
matchLabels:
app: postgres
template:
metadata:
labels:
app: postgres
spec:
containers:
- name: postgres
image: postgres:latest
imagePullPolicy: Never
ports:
- containerPort: 5432
envFrom:
- configMapRef:
name: postgres-config
volumeMounts:
- mountPath: /var/lib/postgresql/data
name: app
volumes:
- name: app
persistentVolumeClaim:
claimName: postgres-pv-claim
---
apiVersion: v1
kind: Service
metadata:
name: postgres
labels:
app: postgres
spec:
type: NodePort
ports:
- port: 5432
selector:
app: postgres
pgAdmin :-
apiVersion: v1
kind: ConfigMap
metadata:
name: pgadmin-config
labels:
app: pgadmin4
data:
PGADMIN_DEFAULT_EMAIL: ap#a.com
PGADMIN_DEFAULT_PASSWORD: posdt
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: pgadmin4
labels:
app: pgadmin4
spec:
replicas: 1
selector:
matchLabels:
app: pgadmin4
template:
metadata:
labels:
app: pgadmin4
spec:
containers:
- name: pgadmin4
image: dpage/pgadmin4:latest
imagePullPolicy: Never
ports:
- containerPort: 80
envFrom:
- configMapRef:
name: pgadmin-config
---
apiVersion: v1
kind: Service
metadata:
name: pgadmin4
labels:
app: pgadmin4
spec:
type: NodePort
ports:
- port: 80
selector:
app: pgadmin4

Answer 1

I just deployed and was able to connect the database. see below
postgres-7cb54957dd-qkfd4 1/1 Running 0 13s
# kubectl exec -it postgres-7cb54957dd-qkfd4 sh
# psql -h 127.0.0.1 -U postgres -q -d app -c 'SELECT 1'
?column?
----------
1
(1 row)
used below YAML with slight modifications
apiVersion: v1
kind: ConfigMap
metadata:
name: postgres-config
labels:
app: postgres
data:
POSTGRES_DB: app
POSTGRES_USER: postgres
POSTGRES_PASSWORD: password
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: postgres
labels:
app: postgres
spec:
replicas: 1
selector:
matchLabels:
app: postgres
template:
metadata:
labels:
app: postgres
spec:
containers:
- name: postgres
image: postgres:latest
imagePullPolicy: Always
ports:
- containerPort: 5432
envFrom:
- configMapRef:
name: postgres-config
volumeMounts:
- mountPath: /var/lib/postgresql/data
name: app
volumes:
- name: app
emptyDir: {}
---
apiVersion: v1
kind: Service
metadata:
name: postgres
labels:
app: postgres
spec:
type: NodePort
ports:
- port: 5432
selector:
app: postgres