It sounds like you are running on KVM, is that correct?
It also sounds like putting the storage in maintenance mode from CloudStack
does not cause any issues, but stopping the NFS service does cause issues. Is
that correct, as well?
Is it possible the hosts in your compute cluster are putting a heartbeat file
on the primary storage whose NFS service you stopped?
On 3/21/17, 10:44 PM, "Gust" <digitalg...@163.com> wrote:
when change the C storage to maintance , group normally ,no exception
occured.
when stop the NFS on C storage , all vm stoped and some hypervisors
rebooted by cloudstack-agent.
In C storage ,only one file that for VMC1, there aren’t disk image for
other vms , so it stoped all vms to be beyond comprehension.
> 在 2017年3月22日，11:39，Tutkowski, Mike <mike.tutkow...@netapp.com> 写道：
>
> Do you know if your other VMs shut down when you stopped the NFS service
or when you put the primary storage into maintenance mode?
>
> Putting a primary storage in maintenance mode should only shut down VMs
that have one or more disks running from that primary storage.
>
> For example, if you had your root disk on primary storage A and a data
disk on primary storage C and you put primary storage C into maintenance mode,
then this VM will be shut down.
>
> On 3/21/17, 9:12 PM, "Gust" <digitalg...@163.com> wrote:
>
> Our cloudstack (4.9.1) group have 4 primary storage named as A/B/C/D,
almost all vm disk image in A storage. only one vm (name VMC1) disk image in C
storage.
>
> yesterday ,
> we close VMC1 and change the C storage to maintance state,
> then stop the NFS service in C storage ,
> after that , all vm stoped , whatever vm disk image in A or in C,
> we were stunned.
>
> In cloudstack website , we found follow doc , but it descripte stops
all VMs stored on C storage device in my situation, what happenned ?
>
> Primary Storage Outage and Data Loss¶
> When a primary storage outage occurs the hypervisor immediately stops
all VMs stored ——> on that storage device <—— . Guests that are
marked for HA will be restarted as soon as practical when the primary storage
comes back on line. With NFS, the hypervisor may allow the virtual machines to
continue running depending on the nature of the issue. For example, an NFS hang
will cause the guest VMs to be suspended until storage connectivity is
restored.Primary storage is not designed to be backed up. Individual volumes in
primary storage can be backed up using snapshots.
>
>
>
>
>
