k8s 存储配置，需要深入请自行看文档

1、本机测试环境，测试普通的pv，pvc

apiVersion: v1
kind: PersistentVolume
metadata:
  name: mongodb-pv
spec:
  capacity: 
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
    - ReadOnlyMany
  persistentVolumeReclaimPolicy: Retain
  hostPath:
    path: /tmp/mongodb

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mongodb-pvc 
spec:
  resources:
    requests:
      storage: 1Gi
  accessModes:
  - ReadWriteOnce
  storageClassName: ""         #这个地方如果不配置未空就可能会发现意想不到的故事，例如明明没有配置存储类，手动创建了pv，这个pvc却没有绑定pv，却通过存储类绑定了

---
apiVersion: v1
kind: Pod
metadata:
  name: mongodb 
spec:
  containers:
  - image: mongo
    name: mongodb
    volumeMounts:
    - name: mongodb-data
      mountPath: /data/db
    ports:
    - containerPort: 27017
      protocol: TCP
  volumes:
  - name: mongodb-data
    persistentVolumeClaim:
      claimName: mongodb-pvc

 

PVC 申领不必一定要请求某个类。如果 PVC 的 storageClassName 属性值设置为 ""， 则被视为要请求的是没有设置存储类的 PV 卷，因此这一 PVC 申领只能绑定到未设置存储类的 PV 卷（未设置注解或者注解值为 "" 的 PersistentVolume（PV）对象在系统中不会被删除， 因为这样做可能会引起数据丢失）。原文

2、通过存储类绑定

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: fast
provisioner: docker.io/hostpath
parameters:
  type: pd-ssd

---

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mongodb-pvc 
spec:
  storageClassName: fast
  resources:
    requests:
      storage: 100Mi
  accessModes:
    - ReadWriteOnce

---

apiVersion: v1
kind: Pod
metadata:
  name: mongodb 
spec:
  containers:
  - image: mongo
    name: mongodb
    volumeMounts:
    - name: mongodb-data
      mountPath: /data/db
    ports:
    - containerPort: 27017
      protocol: TCP
  volumes:
  - name: mongodb-data
    persistentVolumeClaim:
      claimName: mongodb-pvc

 

3、statefulset 使用存储

kind: List
apiVersion: v1
items:
- apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: pv-a
  spec:
    capacity:
      storage: 1Mi
    accessModes:
      - ReadWriteOnce
    persistentVolumeReclaimPolicy: Recycle
    hostPath:
      path: /tmp/pv-a
- apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: pv-b
  spec:
    capacity:
      storage: 1Mi
    accessModes:
      - ReadWriteOnce
    persistentVolumeReclaimPolicy: Recycle
    hostPath:
      path: /tmp/pv-b
- apiVersion: v1
  kind: PersistentVolume
  metadata:
    name: pv-c
  spec:
    capacity:
      storage: 1Mi
    accessModes:
      - ReadWriteOnce
    persistentVolumeReclaimPolicy: Recycle
    hostPath:
      path: /tmp/pv-c

---

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: kubia
spec:
  serviceName: kubia
  replicas: 2
  selector:
    matchLabels:
      app: kubia # has to match .spec.template.metadata.labels
  template:
    metadata:
      labels:
        app: kubia
    spec:
      containers:
      - name: kubia
        image: luksa/kubia-pet
        ports:
        - name: http
          containerPort: 8080
        volumeMounts:
        - name: data
          mountPath: /var/data
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      storageClassName: ""
      resources:
        requests:
          storage: 1Mi
      accessModes:
      - ReadWriteOnce


---


apiVersion: v1
kind: Service
metadata:
  name: kubia
spec:
  clusterIP: None
  selector:
    app: kubia
  ports:
  - name: http
    port: 80

看看输出：

xxx@localhost new % kubectl get pv
NAME   CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS      CLAIM                  STORAGECLASS   REASON   AGE
pv-a   1Mi        RWO            Recycle          Bound       default/data-kubia-0                           29h
pv-b   1Mi        RWO            Recycle          Bound       default/data-kubia-1                           29h
pv-c   1Mi        RWO            Recycle          Available                                                  29h
xxx@localhost new % kubectl get sts
NAME    READY   AGE
kubia   2/2     29h
xxx@localhost new % kubectl get pvc
NAME           STATUS   VOLUME   CAPACITY   ACCESS MODES   STORAGECLASS   AGE
data-kubia-0   Bound    pv-a     1Mi        RWO                           29h
data-kubia-1   Bound    pv-b     1Mi        RWO                           29h
xxx@localhost new % kubectl get sc
NAME                 PROVISIONER          RECLAIMPOLICY   VOLUMEBINDINGMODE   ALLOWVOLUMEEXPANSION   AGE
hostpath (default)   docker.io/hostpath   Delete          Immediate           false                  125d