kubernetes - 在Minikube上的Kubernetes StatefulSet中添加持久卷

我是Kubernetes的新手，我正在尝试在Minikube的StatefulSet中添加PVC。
PV和PVC如下所示:

NAME            CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS    CLAIM                      STORAGECLASS   REASON    AGE
neo4j-backups   5Gi        RWO            Retain           Bound     default/backups-claim      manual                   1h

NAME            STATUS    VOLUME          CAPACITY   ACCESS MODES   STORAGECLASS   AGE
backups-claim   Bound     neo4j-backups   5Gi        RWO            manual         51m

基本上，我希望StatefulSet的所有Pod都能看到该卷的内容，因为备份文件存储在该卷中。
使用的StatefulSet可以找到here
Minikube版本:minikube version: v0.25.2Kubernetes版本:GitVersion:"v1.9.4"

最佳答案

如果在volumeClaimTemplates中使用StatefulSet，则k8s将进行动态配置并为每个Pod创建一个PVC和相应的PV，因此它们中的每个都有自己的存储。

您想要创建一个PV和一个PVC，并将其用于Statefulset的所有副本中。

下面是Kubernetes 1.10上的示例，如何做到这一点，其中/var/www/html将由所有三个Pod共享，只需将/directory/on/host更改为机器上的某个本地目录即可。我也在minikube v0.26.0上运行了这个示例

当然，下面仅是说明此想法的示例，但在实际示例中，Pod中的进程应注意同步访问共享存储。

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: local-storage
provisioner: kubernetes.io/no-provisioner
volumeBindingMode: WaitForFirstConsumer
---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: example-pv
spec:
  capacity:
    storage: 100Gi
  # volumeMode field requires BlockVolume Alpha feature gate to be enabled.
  volumeMode: Filesystem
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Delete
  storageClassName: local-storage
  local:
    path: /directory/on/host
  nodeAffinity:
    required:
      nodeSelectorTerms:
        - matchExpressions:
            - key: kubernetes.io/hostname
              operator: In
              values:
                - minikube
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: example-local-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
  storageClassName: local-storage
---
apiVersion: "apps/v1beta1"
kind: StatefulSet
metadata:
  name: nginx
spec:
  serviceName: nginx
  replicas: 3
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
        - name: nginx-container
          image: "nginx:1.12.2"
          imagePullPolicy: "IfNotPresent"
          volumeMounts:
            - name: localvolume
              mountPath: /var/www/html
      volumes:
        - name: localvolume
          persistentVolumeClaim:
            claimName: example-local-claim

关于kubernetes - 在Minikube上的Kubernetes StatefulSet中添加持久卷，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/49729461/