On 03/04/2014 23:43, Brian Beverage wrote:
Here is some info on what I am trying to accomplish. My goal here is to
find the least expensive way to get into Virtualization and storage
without the cost of a SAN and Proprietary software
...
I have been
tasked with taking a new start up project and basically trying to
incrementally move us into a VM environment without the use of a SAN.
Given those objectives, I'd suggest you also have a look at ganeti.
This won't give you the hyperscale storage of ceph, nor the remote
S3/block/filesystem access. What it does give you is a clustered VM
manager which can configure per-VM DRBD disk replication between pairs
of nodes. So you basically get compute nodes with local storage, but
with the ability to live-migrate VMs to their nominated secondary node,
with no SAN or shared filesystem required. It's what Google use to run
their internal office infrastructure, and is very actively developed and
supported.
Of course, you still need to test it with your workload. If you're
tuning, have a look at drbd >= 8.4.3:
http://blogs.linbit.com/p/469/843-random-writes-faster/
Ganeti can also manage VMs using ceph rbd backend (I haven't tried that
yet). The not-yet-released ganeti 2.12 has signficantly reworked this to
use KVM's direct rbd protocol access, rather than going via the kernel
rbd driver.
http://docs.ganeti.org/ganeti/master/html/design-ceph-ganeti-support.html
So even if you do go with ceph for the storage, I think you'll still
find ganeti interesting as a way to manage the lifecycle of the VMs
themselves.
http://www.slideshare.net/gpaterno1/comparing-iaas-vmware-vs-openstack-vs-googles-ganeti-28016375
Apologies if this is OT for this list.
Regards,
Brian.
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