AWS Kubernetes Cluster - WordPress Error establishing a database connection - mysql

Question

I am novice person to Kubernetes and trying to deploying WordPress and MySQL using the Kubernetes pod containers but its throwing the error "Error establishing a database connection" while running the Kubernetes .
Wordpress Error
Overall Kubect status
AWS Inbound Rules
mysql-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-deployment
labels:
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
ports:
- containerPort: 80
env:
- name: MYSQL_ROOT_PASSWORD
value: DEVOPS1
- name: MYSQL_USER
value: wpuser
- name: MYSQL_PASSWORD
value: DEVOPS12345
- name: MYSQL_DATABASE
value: wpdb
mysql-service.yaml
apiVersion: v1
kind: Service
metadata:
name: mysql-service
spec:
selector:
app: mysql
ports:
- protocol: TCP
port: 3306
targetPort: 3306
wordpress-deployment.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress-deployment
labels:
app: wordpress
spec:
replicas: 3
selector:
matchLabels:
app: wordpress
template:
metadata:
labels:
app: wordpress
spec:
containers:
- name: wordpress
image: wordpress
ports:
- containerPort: 80
env:
- name: WORDPRESS_DB_HOST
value: mysql-service
- name: WORDPRESS_DB_USER
value: wpuser
- name: WORDPRESS_DB_PASSWORD
value: wpdb
- name: WORDPRESS_DEBUG
value: "1"
wp-service.yaml
apiVersion: v1
kind: Service
metadata:
name: wordpress-service
spec:
type: NodePort
selector:
app: wordpress
ports:
- protocol: TCP
port: 80
targetPort: 80
Also I opened same thread on Kubernetes forum . Click Here to view it

Answer 1

Please change containerPort in your mysql-deployment file from 80 to 3306:
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql-deployment
labels:
app: mysql
spec:
replicas: 1
selector:
matchLabels:
app: mysql
template:
metadata:
labels:
app: mysql
spec:
containers:
- name: mysql
image: mysql:5.7
ports:
- containerPort: 3306
env:
- name: MYSQL_ROOT_PASSWORD
value: DEVOPS1
- name: MYSQL_USER
value: wpuser
- name: MYSQL_PASSWORD
value: DEVOPS12345
- name: MYSQL_DATABASE
value: wpdb
Check similar problem: wordpress-database-connection-kubernetes.