k8s存储卷系列二：一个local volume的完整例子pv-pvc-pod--学习记录

学习pv 的时候没有网络卷什么的，所以我把我的一台虚拟机当作网络存储节点，具体过程如下：

首先构建pv: apiVersion: v1 kind: PersistentVolume # pv metadata: name: example-pv labels: release: "stable" # 为了让后续的pvc绑定到此pv上，所以加了labels spec: capacity: storage: 10Gi volumeMode: Filesystem accessModes: - ReadWriteOnce persistentVolumeReclaimPolicy: Delete storageClassName: local-storage local: path: /data/along # 本地存放目录 nodeAffinity: # 调度选择 required: nodeSelectorTerms: - matchExpressions: - key: kubernetes.io/hostname operator: In values: - 172.31.0.53

创建成功结果

[root@vm172-31-0-9 store_method]# kubectl get pv -o wide NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE VOLUMEMODE example-pv 10Gi RWO Delete Bound default/example-local-claim local-storage 97m Filesystem

描述如下

[root@vm172-31-0-9 store_method]# kubectl describe pv example-pv Name: example-pv Labels: release=stable Annotations: pv.kubernetes.io/bound-by-controller: yes Finalizers: [kubernetes.io/pv-protection] StorageClass: local-storage Status: Bound Claim: default/example-local-claim Reclaim Policy: Delete Access Modes: RWO VolumeMode: Filesystem Capacity: 10Gi Node Affinity: Required Terms: Term 0: kubernetes.io/hostname in [172.31.0.53] Message: Source: Type: LocalVolume (a persistent volume backed by local storage on a node) Path: /data/along Events: <none> 创建pvc kind: PersistentVolumeClaim apiVersion: v1 metadata: name: example-local-claim spec: accessModes: - ReadWriteOnce resources: requests: storage: 50Mi storageClassName: local-storage selector: matchLabels: release: "stable" # 为了于上面的pvc绑定

如下

[root@vm172-31-0-9 store_method]# kubectl get pvc NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE example-local-claim Bound example-pv 10Gi RWO local-storage 101m 创建pod使用pvc apiVersion: v1 kind: Pod metadata: name: local-pvc-pod spec: containers: - image: busybox name: test-local-pvc command: [ "sleep", "3600" ] volumeMounts: - mountPath: /data # pod下的目录 name: data-volume volumes: - name: data-volume # 为挂在过来的pvc起名字 persistentVolumeClaim: claimName: example-local-claim # 选中上面的pvc

结果是这样的

[root@vm172-31-0-9 store_method]# kubectl describe pod local-pvc-pod Name: local-pvc-pod ...省略... Volumes: data-volume: Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace) ClaimName: example-local-claim ReadOnly: false default-token-cnjj9: Type: Secret (a volume populated by a Secret) SecretName: default-token-cnjj9 Optional: false ...省略...

进入pod写内容

[root@vm172-31-0-9 store_method]# kubectl exec -it local-pvc-pod -- /bin/sh / # ls bin data dev etc home proc root sys tmp usr var / # echo "are you ok?">>/data/test.log [root@vm172-31-0-9 store_method]# ssh 172.31.0.53 Last login: Thu Sep 3 16:40:00 2020 from 172.31.0.9 [root@vm172-31-0-53 ~]# ls [root@vm172-31-0-53 ~]# cat /data/along/test.log are you ok?

参考文章 3种存储傻傻分不清楚！ https://stor.51cto.com/art/201812/588905.htm###