LVM Node Expansion¶
The storage system can be expanded by adding storage nodes. In HwameiStor, new storage nodes can be added by following these steps.
Steps¶
1. Prepare the new storage node¶
Add a new node to the Kubernetes cluster or select an existing cluster node (non-HwameiStor node). The node must meet all the prerequisites mentioned in the Prerequisites document. In this example, the details of the new storage node and disk are as follows:
- name: k8s-worker-4
- devPath: /dev/sdb
- diskType: SSD disk
After successfully adding the new node to the Kubernetes cluster, check and ensure that the following pods are running on that node and the related resources exist in the cluster:
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
k8s-worker-3 Ready worker 96d v1.24.3-2+63243a96d1c393
k8s-worker-4 Ready worker 1h v1.24.3-2+63243a96d1c393
hwameistor-local-disk-manager-c86g5 2/2 Running 0 19h 10.6.182.105 k8s-worker-4 <none> <none>
hwameistor-local-storage-s4zbw 2/2 Running 0 19h 192.168.140.82 k8s-worker-4 <none> <none>
Check the LocalStorageNode resource:
2. Add the new storage node to the HwameiStor system¶
To add a storage node, create a LocalStorageClaim resource to build a StorageClass for the new storage node. By doing this, the node will be successfully added to the HwameiStor system. Follow the steps below:
$ kubectl apply -f - <<EOF
apiVersion: hwameistor.io/v1alpha1
kind: LocalDiskClaim
metadata:
name: k8s-worker-4
spec:
nodeName: k8s-worker-4
owner: local-storage
description:
diskType: SSD
EOF
3. Post-check¶
After completing the above steps, check the status of the new storage node and its StorageClass to ensure the normal operation of the node and HwameiStor system. Follow the steps below:
apiVersion: hwameistor.io/v1alpha1
kind: LocalStorageNode
metadata:
name: k8s-worker-4
spec:
hostname: k8s-worker-4
storageIP: 10.6.182.103
topogoly:
region: default
zone: default
status:
pools:
LocalStorage_PoolSSD:
class: SSD
disks:
- capacityBytes: 214744170496
devPath: /dev/sdb
state: InUse
type: SSD
freeCapacityBytes: 214744170496
freeVolumeCount: 1000
name: LocalStorage_PoolSSD
totalCapacityBytes: 214744170496
totalVolumeCount: 1000
type: REGULAR
usedCapacityBytes: 0
usedVolumeCount: 0
volumeCapacityBytesLimit: 214744170496
volumes:
state: Ready