VSAN cluster cannot create virtual machine

[XiaoJin2361]

The VSAN cluster cannot create a virtual machine, but it can run normally. If it is booted, it will report an error and cannot create "XXXX.vswp".

[XiaoJin2361]

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事件详细信息:
	类型: 信息 时间: 2018/10/23 13:28:46
任务详细信息:
	名称: CreateVM_Task 描述: 创建虚拟机
错误堆栈:
	出现了未知错误。
其他事件详细信息:
	类型 ID: Info DataCenter 对象类型: Datacenter ChainId: 1874799
其他任务详细信息:
	VC 内部版本: 3634794 任务 ID: Task 可取消的: True 已取消: False 描述 ID: Folder.createVm 事件链 ID: 0

[TheBobkin]

Hello XiaoJin2361​,

"The VSAN cluster cannot create a virtual machine, but it can run normally."

If you cannot create a VM/vmdk then you likely either have a cluster partition or are out of space on at least some capacity-tier drives in your cluster. One can check both of these points via Cluster > Monitor > vSAN > Health

If vCenter is down or hosts are not responding and Health is not functional then start via SSH to the hosts with checking cluster membership and vsanDatastore usage and size (e.g. if it is reduced size or 0 then disks/hosts are not participating):

# localcli vsan cluster get

# df -h

"If it is booted, it will report an error and cannot create "XXXX.vswp"."

.vswp Objects are created fresh every time a VM is booted - the same points above apply here (cluster partition and/or out of space). In fact typically you don't even need the cluster to be fully formed to create .vswp as they have Force Provisioning enabled (you still obviously need to be able to see and write to the vsanDatastore though).

Bob