Wordpress in Kubernetes K3s on Raspberry Pi

mariadb.yml

# This manifest assumes 'wordpress' namespace is already present:
#
#   kubectl create namespace wordpress
#
# Apply the manifest with:
#
#   kubectl apply -f mariadb.yml
---
apiVersion: v1
kind: Secret
metadata:
  name: mariadb-pass
  namespace: wordpress
  labels:
    app: wordpress
data:
  # This value is base64-encoded. Do not use this password in production!
  password: MjJzaXl3dVpBNFdmeHNZcg==

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mariadb-pv-claim
  namespace: wordpress
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress-mariadb
  namespace: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mariadb
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mariadb
    spec:
      containers:
        - image: tobi312/rpi-mariadb:10.3
          name: mariadb
          env:
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mariadb-pass
                  key: password
          ports:
            - containerPort: 3306
              name: mariadb
          volumeMounts:
            - name: mariadb-persistent-storage
              mountPath: /var/lib/mysql
          resources:
            limits:
              cpu: '1'
              memory: '512Mi'
            requests:
              cpu: '500m'
              memory: '256Mi'
      volumes:
        - name: mariadb-persistent-storage
          persistentVolumeClaim:
            claimName: mariadb-pv-claim

---
apiVersion: v1
kind: Service
metadata:
  name: wordpress-mariadb
  namespace: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 3306
  selector:
    app: wordpress
    tier: mariadb
  clusterIP: None

wordpress.yml

# This manifest assumes 'wordpress' namespace is already present:
#
#   kubectl create namespace wordpress
#
# Apply the manifest with:
#
#   kubectl apply -f wordpress.yml
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: wp-pv-claim
  namespace: wordpress
  labels:
    app: wordpress
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wordpress
  namespace: wordpress
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: frontend
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: frontend
    spec:
      containers:
        - image: wordpress:5.4-apache
          name: wordpress
          env:
            - name: WORDPRESS_DB_HOST
              value: wordpress-mariadb
            - name: WORDPRESS_DB_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mariadb-pass
                  key: password
          ports:
            - containerPort: 80
              name: wordpress
          volumeMounts:
            - name: wordpress-persistent-storage
              mountPath: /var/www/html
          resources:
            limits:
              cpu: '1'
              memory: '512Mi'
            requests:
              cpu: '500m'
              memory: '256Mi'
      volumes:
        - name: wordpress-persistent-storage
          persistentVolumeClaim:
            claimName: wp-pv-claim

---
apiVersion: v1
kind: Service
metadata:
  name: wordpress
  namespace: wordpress
  labels:
    app: wordpress
spec:
  ports:
    - port: 80
  selector:
    app: wordpress
    tier: frontend
  type: NodePort

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: wordpress
  namespace: wordpress
spec:
  rules:
    - host: wordpress.10.0.100.99.nip.io
      http:
        paths:
          - path: /
            backend:
              serviceName: wordpress
              servicePort: 80

Been cruising around the youtube episodes and made to the point that I had wordpress running. The problem is that the ingress does not route to the wordpress app.
root@master:~/wordpress# kubectl get all -n wordpress NAME READY STATUS RESTARTS AGE pod/wordpress-mariadb-54f564f668-n76xm 1/1 Running 0 24m pod/wordpress-8bbd9f77c-f4cll 1/1 Running 0 6m37s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/wordpress NodePort 10.43.160.149 80:30957/TCP 24m service/wordpress-mariadb ClusterIP None 3306/TCP 24m NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/wordpress-mariadb 1/1 1 1 24m deployment.apps/wordpress 1/1 1 1 24m NAME DESIRED CURRENT READY AGE replicaset.apps/wordpress-mariadb-54f564f668 1 1 1 24m replicaset.apps/wordpress-5c6b9f6dd9 0 0 0 24m replicaset.apps/wordpress-8bbd9f77c 1 1 1 6m37s

@raevillena
I ran in to the same problem where everything was running but the ingress address didn't load anything. I got to looking at the ingress address and realized it's using the IP for one of Jeff's nodes from the Ingress section at the bottom of the wordpress.yml. I edited that to be one of my nodes. i ran 'kubectl delete -f mariadb.yml' and ran it again for the wordpress.yml file and also 'kubectl delete namespace wordpress' to delete the namespace and restarted the cluster. Basically I wanted to start fresh. Once back up I created the wordpress namespace again and then ran the 'kubectl apply -f mariadb.yml' and made sure it was running using the 'kubectl get nodes -n wordpress' before running the apply again on the wordpress.yml. I tracked to see when that was running and then got the ingress address which was now pointing to one of my nodes and it loaded Wordpress. Hopefully this helps you and I didn't screw up one of the commands. I'm new at this and was just following his awesome series on the pi cluster as well.

Thanks @geerlingguy for the awesome series!

I pretty much did the same thing. I forgot to update my comment on this thread for everyone. Thanks for your update.

Hi Jeff,

I think I have version problem with deployment of the wordpres.yml file.

Warning: extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress ingress.extensions/wordpress configured

I try to adapt wordpress.yml file accordingly in the line 90 apiVersion: extensions/v1beta1
without success. Do you have any ideas? My k3s VERSION: v1.20.2+k3s1

By the way Thank you very much for your videos on k3s on raspberry cluster and Kubernetes! Great content!

Cheers,
Nenad

Hi Nenad13, here is the last reworked version from me that I can confirm that it works:

I'm newbie with k3s but everything went well here.

I have a question, how can i access wordpress in browser?

Update:
I got how to deal with it.

Could we please have your code updated ?

/var/lib/mysql as datadir is not working - I keep trying find a solution for this.

I can mount my persistent volumne to /data no problem but the database will write to /var/lib/mysql.

Here the error message.

2022-08-04 09:56:27+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:10.3.* started.
chown: changing ownership of '/var/lib/mysql/': Operation not permitted

;o)