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pvc-device.md

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本地设备挂载块设备使用

对于k8s存储卷来说其有一套标准的使用流程，如下我们将展示一下在使用carina存储驱动下这些文件如何配置及创建的

首选创建storageclass kubectl apply -f storageclass.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: csi-carina-sc
provisioner: carina.storage.io
parameters:
  # file system
  csi.storage.k8s.io/fstype: xfs
  # disk group
  carina.storage.io/disk-group-name: hdd
reclaimPolicy: Delete
allowVolumeExpansion: true
# WaitForFirstConsumer表示被容器绑定调度后再创建pv
volumeBindingMode: WaitForFirstConsumer
mountOptions:
  • 要标识创建设备的文件系统使用csi.storage.k8s.io/fstype参数
  • 要标识设备使用的磁盘使用carina.storage.io/disk-group-name 支持 hdd ssd值

创建PVC kubectl apply -f pvc.yaml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: raw-block-pvc
  namespace: carina
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Block
  resources:
    requests:
      storage: 13Gi
  storageClassName: csi-carina-sc

PVC创建完成后，carina-controller会创建LogicVolume，carina-node则负责监听LogicVolume的创建事件，并在本地创建lvm存储卷

$ kubectl get lv
NAME                                       SIZE   GROUP           NODE          STATUS
pvc-319c5deb-f637-423b-8b52-42ecfcf0d3b7   7Gi    carina-vg-hdd   10.20.9.154   Success

挂载到容器内使用kubectl apply -f pod.yaml

---
apiVersion: v1
kind: Pod
metadata:
  name: carina-block-pod
  namespace: carina
spec:
  containers:
    - name: centos
      securityContext:
        capabilities:
          add: ["SYS_RAWIO"]
      image: centos:latest
      imagePullPolicy: "IfNotPresent"
      command: ["/bin/sleep", "infinity"]
      volumeDevices:
        - name: data
          devicePath: /dev/xvda
  volumes:
    - name: data
      persistentVolumeClaim:
        claimName: raw-block-pvc