Skip to main content

Disk Storage Node

Raw disk storage nodes provide applications with raw disk data volumes and maintain the mapping between raw disks and raw disk data volumes on the storage node.

Steps​

1. Prepare a disk storage node​

Add the node to the Kubernetes cluster or select a Kubernetes node.

For example, suppose you have a new node with the following information:

  • name: k8s-worker-2
  • devPath: /dev/sdb
  • diskType: SSD disk

After the new node is already added into the Kubernetes cluster, make sure the following HwameiStor pods are already running on this node.

$ kubectl get node
NAME           STATUS   ROLES            AGE     VERSION
k8s-master-1   Ready    master           96d     v1.24.3-2+63243a96d1c393
k8s-worker-1   Ready    worker           96h     v1.24.3-2+63243a96d1c393
k8s-worker-2   Ready    worker           96h     v1.24.3-2+63243a96d1c393

$ kubectl -n hwameistor get pod -o wide | grep k8s-worker-2
hwameistor-local-disk-manager-sfsf1     2/2     Running   0     19h   10.6.128.150      k8s-worker-2   <none>  <none>

# check LocalDiskNode resource
$ kubectl get localdisknode k8s-worker-2
NAME           FREECAPACITY   TOTALCAPACITY   TOTALDISK   STATUS   AGE
k8s-worker-2                                              Ready    21d

2. Add the storage node into HwameiStor​

First, change the owner information of the disk sdb to local-disk-manager as below:

$ kubectl edit ld localdisk-2307de2b1c5b5d051058bc1d54b41d5c
apiVersion: hwameistor.io/v1alpha1
kind: LocalDisk
metadata:
  name: localdisk-2307de2b1c5b5d051058bc1d54b41d5c
spec:
  devicePath: /dev/sdb
  nodeName: k8s-worker-2
+ owner: local-disk-manager
...

Create the storage pool of the node by adding a LocalStorageClaim CR as below:

$ kubectl apply -f - <<EOF
apiVersion: hwameistor.io/v1alpha1
kind: LocalDiskClaim
metadata:
  name: k8s-worker-2
spec:
  nodeName: k8s-worker-2
  owner: local-disk-manager
  description:
    diskType: SSD
EOF

3. Post check​

Finally, check if the node has created the storage pool by checking the LocalDiskNode CR.

kubectl get localstoragenode k8s-worker-2 -o yaml

The output may look like:

apiVersion: hwameistor.io/v1alpha1
kind: LocalDiskNode
metadata:
  name: k8s-worker-2
spec:
  nodeName: k8s-worker-2
status:
  pools:
    LocalDisk_PoolSSD:
      class: SSD
      disks:
        - capacityBytes: 214744170496
          devPath: /dev/sdb
          state: Available
          type: SSD
      freeCapacityBytes: 214744170496
      freeVolumeCount: 1
      totalCapacityBytes: 214744170496
      totalVolumeCount: 1
      type: REGULAR
      usedCapacityBytes: 0
      usedVolumeCount: 0
      volumeCapacityBytesLimit: 214744170496
      volumes:
  state: Ready