mysql: Add k8s first example

mysql/k8s/01_mysql_secrets.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: mysql-secret
+type: Opaque
+data:
+  # Encoded base64 string required by kubernetes
+  # echo -n '<wanted_value>' | base64
+  mysql-root-password: cm9vdA==

mysql/k8s/02_mysql_statefulset.yaml

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+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: mysql-db-deployment
+  labels:
+    app: mysql-db
+spec:
+  serviceName: mysql-db-service
+  replicas: 1
+  selector:
+    matchLabels:
+      app: mysql-db
+  template:
+    metadata:
+      labels:
+        app: mysql-db
+    spec:
+      containers:
+      - name: mysql
+        image: mysql:9
+        resources:
+          requests:
+            memory: "512Mi"
+            cpu: "1000m"
+          limits:
+            memory: "2048Mi"
+            cpu: "2000m"
+        ports:
+        - containerPort: 3306
+        env:
+        - name: MYSQL_ROOT_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mysql-secret
+              key: mysql-root-password
+        volumeMounts:
+        - name: mysql-data
+          mountPath: /var/lib/mysql
+  volumeClaimTemplates:
+  - metadata:
+      name: mysql-data
+    spec:
+      accessModes: [ "ReadWriteOnce" ]
+      resources:
+        requests:
+          storage: 1Gi

mysql/k8s/03_mysql_service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: mysql-db-service
+spec:
+  type: ClusterIP
+  selector:
+    app: mysql-db
+  ports:
+  - protocol: TCP
+    port: 3306
+    targetPort: 3306

mysql/k8s/04_mysql_config_map.yaml

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+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: mysql-configmap
+data:
+  mysql-server: mysql-db-service

mysql/k8s/05_phpmyadmin_deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mysql-phpmyadmin-deployment
+  labels:
+    app: mysql-phpmyadmin
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: mysql-phpmyadmin
+  template:
+    metadata:
+      labels:
+        app: mysql-phpmyadmin
+    spec:
+      containers:
+      - name: phpmyadmin
+        image: phpmyadmin:5.2
+        resources:
+          limits:
+            memory: "256Mi"
+            cpu: "1000m"
+        ports:
+        - containerPort: 80
+        env:
+        - name: PMA_HOST
+          valueFrom:
+            configMapKeyRef:
+              name: mysql-configmap
+              key: mysql-server
+        - name: PMA_USER
+          value: root
+        - name: PMA_PASSWORD
+          valueFrom:
+            secretKeyRef:
+              name: mysql-secret
+              key: mysql-root-password

mysql/k8s/06_phpmyadmin_service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: mysql-phpmyadmin-service
+  labels:
+    app: mysql-phpmyadmin
+spec:
+  type: ClusterIP
+  selector:
+    app: mysql-phpmyadmin
+  ports:
+  - protocol: TCP
+    port: 80
+    targetPort: 80

mysql/k8s/07_phpmyadmin_ingress.yaml

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+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: mysql-phpmyadmin-ingress
+  annotations:
+    nginx.ingress.kubernetes.io/rewrite-target: /
+spec:
+  ingressClassName: nginx
+  rules:
+  - http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: mysql-phpmyadmin-service
+            port:
+              number: 80