hostpath-cr.yaml

apiVersion: v1
kind: Namespace
metadata:
  name: mariadb-db
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mariadb-custom-config
  namespace: mariadb-db
data:
  custom.conf: |
        # This group is read both both by the client and the server
        # use it for options that affect everything
        #
        [client-server]
        #
        # include all files from the config directory
        #
        !includedir /etc/my.cnf.d
        port=3306
        ssl=0
        [mysqld]
        innodb_file_per_table=1
        innodb_flush_method=O_DIRECT
        innodb_adaptive_flushing=1
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mariadb-deployment
  namespace: mariadb-db
spec:
  selector:
    matchLabels:
      app: mariadb
  template:
    metadata:
      labels:
        app: mariadb
        type: mariadb-database-server
    spec:
      nodeSelector:
        kubernetes.io/hostname: "worker-0"
      terminationGracePeriodSeconds: 10
      containers:
      - name: mariadb
        image: centos/mariadb-103-centos8:latest
        imagePullPolicy: "IfNotPresent"
        ports:
        - containerPort: 3306
        resources:
          requests:
            cpu: 200m
            memory: 100Mi
          limits:
            cpu: 4
            memory: 16Gi
        env:
           - name: MYSQL_USER
             value: "test"
           - name: MYSQL_PASSWORD
             value: "test"
           - name: MYSQL_ROOT_PASSWORD
             value: "mysql"
      securityContext:
        privileged: true
        volumeMounts:
          - name: mariadb-custom-config
            mountPath: /etc/my.cnf
            subPath: custom.conf #should be the name used in the ConfigMap
          - name: maria-persistent-storage
            mountPath: /var/lib/mysql
            readOnly: false
      volumes:
        - name: mariadb-custom-config
          configMap:
            name: mariadb-custom-config
        - name: maria-persistent-storage
          persistentVolumeClaim:
            claimName: maria-persistent-storage
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: pvdb
  labels:
    type: local
spec:
  persistentVolumeReclaimPolicy: Delete
  storageClassName: manual
  capacity:
    storage: 10Gi
  accessModes:
    - ReadWriteOnce
  hostPath:
    path: /tmp
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
    name: maria-persistent-storage
    namespace: mariadb-db
spec:
    accessModes:
      - ReadWriteOnce
    resources:
      requests:
        storage: 10Gi
    storageClassName: manual
---
apiVersion: v1
kind: Service
metadata:
  name: mariadb-deployment
  namespace: mariadb-db
spec:
  selector:
    app: mariadb
  ports:
    - protocol: TCP
      port: 3306
      targetPort: 3306