Question

我要在一个持久卷声明中将多个volumeMount附加到minikube中的部署。

我有一个部署了tomcat的应用程序，它需要保留三个不同的文件夹（/ var / log / app，/ var / lib / app，/ etc / app）。当容器启动时，我应该在每个目录中获取文件，但是只会填充日志，并且应用程序将失败。知道我的Yaml是正确的还是以错误的方式进行处理？

K8s yaml：

import perfplot

perfplot.show(
    setup=lambda n: pd.DataFrame({'A': np.random.choice(n//10, n), 'B': np.ones(n)}),
    kernels=[
        lambda df: df.groupby('A')['B'].transform('sum'),
        lambda df:  df.A.map(df.groupby('A')['B'].sum()),
    ],
    labels=['GroupBy.transform', 'GroupBy.sum + map'],
    n_range=[2**k for k in range(5, 20)],
    xlabel='N',
    logy=True,
    logx=True
)

v2：

apiVersion: v1

kind: PersistentVolume
metadata:
  name: pv-volume
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 6Gi
  hostPath:
    path: /data/pv-volume
  storageClassName: manual
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: manual
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: app
  labels:
    app: app
spec:
  selector:
    matchLabels:
      app: app
  replicas: 1
  strategy: {}
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
      - image: app:latest
        name: app
        env:
        - name: JAVA_OPTS
          value: -Xms64M -Xmx512M
        ports:
        - containerPort: 8080
        resources:
          requests:
            memory: "512Mi"
            cpu: "250m"
          limits:
            memory: "1024Mi"
            cpu: "500m"
        volumeMounts:
          - name: pv-storage1
            mountPath: /var/log/app
            subPath: log
          - name: pv-storage1
            mountPath: /var/lib/app
            subPath: lib
          - name: pv-storage1
            mountPath: /etc/app
            subPath: etc
        tty: true
      volumes:
      - name: pv-storage1
        persistentVolumeClaim:
          claimName: pv-claim
      restartPolicy: Always
status: {}

Answer 1

使用上面的配置，您尝试将一个PV挂载到多个目录，这意味着它们将与PV配置上的主机路径携带相同的数据。

如果要使用具有不同内容的多个不同目录，则需要为每个目录创建PV和PVC，如下所示：

kind: PersistentVolume
metadata:
  name: pv-volume-log
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 6Gi
  hostPath:
    path: /data/pv-volume/log
  storageClassName: manual
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-log
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: manual

---
kind: PersistentVolume
metadata:
  name: pv-volume-lib
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 6Gi
  hostPath:
    path: /data/pv-volume/lib
  storageClassName: manual
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-lib
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: manual
---
kind: PersistentVolume
metadata:
  name: pv-volume-etc
spec:
  accessModes:
    - ReadWriteOnce
  capacity:
    storage: 6Gi
  hostPath:
    path: /data/pv-volume/etc
  storageClassName: manual
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: pv-claim-etc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: manual

然后在您的Deployment yaml中添加这些卷并将卷分别附加到mountPath：

...
      volumes:
      - name: pv-storage-log
        persistentVolumeClaim:
          claimName: pv-claim-log
      - name: pv-storage-lib
        persistentVolumeClaim:
          claimName: pv-claim-lib
      - name: pv-storage-etc
        persistentVolumeClaim:
          claimName: pv-claim-etc
      restartPolicy: Always
...

我希望它将对您有用

minikube中的多个持久卷

1 个答案: