apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
  labels:
    app.kubernetes.io/name: mysql
    app.kubernetes.io/component: database
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app.kubernetes.io/name: mysql
      app.kubernetes.io/component: database
  template:
    metadata:
      labels:
        app.kubernetes.io/name: mysql
        app.kubernetes.io/component: database
    spec:
      containers:
        - name: mysql
          image: mysql:8.0
          ports:
            - containerPort: 3306
              name: mysql
          env:
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mysql-secret
                  key: MYSQL_ROOT_PASSWORD
            - name: MYSQL_DATABASE
              valueFrom:
                secretKeyRef:
                  name: mysql-secret
                  key: DB_NAME
            - name: MYSQL_USER
              valueFrom:
                secretKeyRef:
                  name: mysql-secret
                  key: MYSQL_USER
            - name: MYSQL_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mysql-secret
                  key: MYSQL_PASSWORD
          volumeMounts:
            - name: mysql-data
              mountPath: /var/lib/mysql
          resources:
            requests:
              cpu: 250m
              memory: 512Mi
            limits:
              cpu: "1"
              memory: 1Gi
          livenessProbe:
            exec:
              command: ["mysqladmin", "ping", "-h", "localhost"]
            initialDelaySeconds: 90
            periodSeconds: 15
            timeoutSeconds: 5
            failureThreshold: 3
          readinessProbe:
            exec:
              command: ["mysqladmin", "ping", "-h", "localhost"]
            initialDelaySeconds: 60
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 5
      volumes:
        - name: mysql-data
          persistentVolumeClaim:
            claimName: mysql-data-pvc

# apiVersion: apps/v1
# kind: Deployment
# metadata:
#   name: mysql
#   labels:
#     app.kubernetes.io/name: mysql
#     app.kubernetes.io/component: database
# spec:
#   replicas: 1
#   strategy:
#     type: Recreate
#   selector:
#     matchLabels:
#       app.kubernetes.io/name: mysql
#       app.kubernetes.io/component: database
#   template:
#     metadata:
#       labels:
#         app.kubernetes.io/name: mysql
#         app.kubernetes.io/component: database
#     spec:
#       containers:
#         - name: mysql
#           image: mysql:8.0
#           ports:
#             - containerPort: 3306
#               name: mysql
#           env:
#             - name: MYSQL_ROOT_PASSWORD
#               valueFrom:
#                 secretKeyRef:
#                   name: mysql-secret
#                   key: MYSQL_ROOT_PASSWORD
#             - name: MYSQL_DATABASE
#               valueFrom:
#                 secretKeyRef:
#                   name: mysql-secret
#                   key: DB_NAME
#           volumeMounts:
#             - name: mysql-data
#               mountPath: /var/lib/mysql
#           resources:
#             requests:
#               cpu: 250m
#               memory: 512Mi
#             limits:
#               cpu: "1"
#               memory: 1Gi
#           livenessProbe:
#             exec:
#               command: ["mysqladmin", "ping", "-h", "localhost"]
#             initialDelaySeconds: 90    # was 30 — must survive full init
#             periodSeconds: 15
#             timeoutSeconds: 5
#             failureThreshold: 3
#           readinessProbe:
#             exec:
#               command: ["mysqladmin", "ping", "-h", "localhost"]
#             initialDelaySeconds: 60    # was 10 — critical fix
#             periodSeconds: 10
#             timeoutSeconds: 5
#             failureThreshold: 5
#       volumes:
#         - name: mysql-data
#           persistentVolumeClaim:
#             claimName: mysql-data-pvc