On 9/14/17 3:30 AM, Perttu Aaltonen wrote:
Hello all. I’ve been following the list for a long time and rarely post
anything, but now wanted to chime in.
On 14 Sep 2017, at 10:31, Alexander Pyhalov <[email protected]> wrote:
2) Zone/VM live migration. Don't tell me "it's too hard, use clusters". I want
to have an illumos-based cluster for virtualization purposes, VMware/Linux KVM/even
OpenVZ do it, why can't we?
I agree. There are a lot of “legacy” software that are not engineered for the
cloud and only runs on Windows. The developers of these kinds of products seem
to often think clustering/HA as a solved problem with VMware and not bother
building it to the product itself. But VMware replication/HA/Fault Tolerance is
complex, finicky and often out of reach for very small businesses due to cost.
I’m not very familiar with HAST and DRBD, but seems like the added complexity
might sometimes outweigh the expected benefits there as well. I’ve read varying
success with OmniOS as a built in storage provider for ESXi through iSCSI or
NFS.
Ideally this would be built in to Illumos/ZFS. I already use SmartOS and
Znapzend for replicating KVM VM’s between hosts, but it’s only crash
consistent. VSS or file system quiescing support would improve this. In small
business space, there usually isn’t a need for a full lock-step fault tolerance
type automated HA with shared storage and what have you, so ability to bring up
replicated VM’s on a backup host in a consistent state would go a long way.
I’ve just recently set up replication between ESXi hosts with Veeam and ZFS
send would just be so much faster and easier to set up and use.
Better yet, LX Zone type ability to run Windows software directly in a zone
would be a dream, but probably quite impossible.
Well how about just porting Xen & DRBD to Illumos. Not so much
"innovation" as simply basic porting. (Now, DRBD is 2-node only, so
maybe Sheepdog - again, not innovation, but incredibly useful.)
Miles Fidelman
--
In theory, there is no difference between theory and practice.
In practice, there is. .... Yogi Berra
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