[PVE-User] Question about Proxmox HA

[Philippe Schwarz]

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Le 07/12/2013 17:52, Leslie-Alexandre DENIS a écrit :
> Hi everybody,
> 
> Just to say, I'm currently building a HA topology that consists of
> 3 nodes, one NFS or iSCSI filer and 2 hypervisors with HA
> capability. All of my experiments are far from finished but I can
> understand the Gilberto's point of view regarding fencing vs
> scripting plus manual tasks. You can consider to "fence" in a
> semi-auto way with fping and L2/L3 probes if you don't have all the
> hardware necessary to fence correctly. The result is almost the
> same if you do it correctly.
> 
> I'll let you know how I had setup my HA after my labs tests.
> 
> PS : concerning the NFS storage, you might want to virtualize some 
> FreenNAS or custom SAN software solution on top of ZFS and
> replicate the data to another VM. I would love to hear some
> feedbacks about that type of solution because It adds some SPOF to
> the topology.
> 
> Kind regards, Le 07/12/2013 16:53, Gilberto Nunes a écrit :
>> No... No DRBD at all...
>> 
>> I lead here with two server and plus one, as a NFS shared
>> storage....
Hi,
i beg to differ.
Because of the ancient principle of  Unix philosophy :
Keep It Simple and Stupid.
Virtualizing the storage could drive you into perf issues or into
non-easily solvable problems.

I love ZFS, really!
(Rescued yesterday my wedding photos with the help of the great ZFS)
But ZFS is neither built to be driven on crapy low-end disk-controller
nor on (possibly) hard-to-debug virtualized disk controller, IMHO.

If you want to backup your ZFS SAN/NAS, you should really have a look
to the built-in solution (zfs snapshot, zfs send, zfs receive),
instead of relying on whatever-copy-solution you want.

But, i'd love to be wrong by discovering ZFS can handle this type of
solution.

Best regards.

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