【Django-CI系统】Volume解法1--SQLite持久化保存到虚拟机hostPath-20220516

步骤1：应用启动时，会将数据从持久卷同步到应用中。因为hostpath: /data为空，故第一次部署时，数据库是空的。
步骤2：应用启动后，数据会从应用同步到持久卷。故在部署后的应用网站上传数据后，数据会同步到hostpath: /data。

步骤3：应用关闭后，数据会保存在持久卷中。
步骤4：将重启pod或deployment后，持久卷会重复步骤1-----应用启动时，会将数据从持久卷同步到应用中。

settings.py

# Database
# https://docs.djangoproject.com/en/3.2/ref/settings/#databases

print(Path(__file__).resolve().parent)

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        #'NAME': BASE_DIR / 'db.sqlite3',
        'NAME': Path(__file__).resolve().parent /'SQL' /'db.sqlite3',
    }
}

yaml档案

apiVersion: apps/v1
kind: Deployment
metadata:
  name: ci-dp
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ci-pod
  template:
    metadata:
      labels:
        app: ci-pod
    spec:
      containers:
      - name: ci
        image: seasonzhang/civ2:5.0
        imagePullPolicy: Always
        resources:
          requests:
            cpu: 500m
            memory: 500Mi
          limits:
            cpu: 800m
            memory: 1000Mi
        ports:
        - containerPort: 8000
          name: ci-pod
          protocol: TCP
        volumeMounts:
        - name: ci-pvcc
          mountPath: "/code/package/training_system/SQL"
      volumes:
       - name: ci-pvcc
         persistentVolumeClaim:
         hostPath:
            # directory location on host
            path: /data
            # this field is optional
            type: Directory
---
apiVersion: v1
kind: Service
metadata:
  name: ci-svc
spec:
  type: LoadBalancer
  ports:
   - port: 8330
     targetPort: 8000
     protocol: TCP
  selector:
    app: ci-pod