Kubernetes Mariadb service cannot be accessed - wordpress

Question

i wanted to make wordpress with kubernetes, but wordpress cant use host from mariadb-service. This is my script
---
apiVersion: v1
kind: Service
metadata:
name: db-wordpress
labels:
app: mariadb-database
spec:
selector:
app: mariadb-database
ports:
- port: 3306
clusterIP: None
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: mariadb-database
spec:
selector:
matchLabels:
app: mariadb-database
template:
metadata:
labels:
app: mariadb-database
spec:
containers:
- name: mariadb-database
image: darywinata/mariadb:1.0
env:
- name: MYSQL_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: database-secret
key: password
- name: MYSQL_USER
value: blibli
- name: MYSQL_PASSWORD
valueFrom:
secretKeyRef:
name: database-secret
key: password
- name: MYSQL_DATABASE
value: wpdb
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: servicetype
operator: In
values:
- database-mariadb
im already fight this error for 1 week, can somebody help me with this?
note: inside docker container port 3306 is not listening, idk this is wrong or not.

Answer 1

Hi there and welcome to stackoverflow.
There are two issues with your setup. First of all, I have tried running your mysql docker image locally and compared to the official mysql image it is not listening to any port. Without the mysql process listening to any port, you will not be able to connect to it.
Also, you might want to consider a standard internal service type instead of one with clusterIP: None which is called a headless service and usually used for statefulsets and not deployments. more information can be found on the official documentation
So in order to connect from your application to your pod:
Fix problem with your custom mysql image so it actually listens on port 3306 (or whatever you have configured in your image)