Re: debops and openstack

Very nice breakdown of the various virtualization models. The SAN/NAS storage can definitely be something else like Synology or NetApp devices which you can connect to your hypervisor infrastructure using NFS, iSCSI or similar technologies. On the other side, your hypervisors can then be thin blade servers with only so much storage to start the hypervisor OS - after all virtual machine storage is hosted elsewhere. There's where the compute/storage split comes from.

> it’s an auto allocations based on the controllers etc. controlling > what/where etc. and you typically only have block storage you write to… the > challenge here: BIG FAT back end network links, as every disk io goes out on > the network Using 10 GBit/s or more FibreChannel connections definitely helps. In such case your hypervisors usually have separate network cards that connect to the storage network, and a different set of cards that are used for normal VM traffic. Add to that separate VLANs or even entire software-defined networking like VXLAN overlays to keep your tenants in their own separate networks and we can start talking about offering cloud services to third parties... Kind of like our own AWS/OVH/Hetzner/DigitalOcean cloud. Suddenly your IT department can become a source of revenue instead of being only a cost center. But that's a topic for another discussion. :)

>>> In the end, I think that DebOps as a solid base to deploy OpenStack, >>> OpenNebula or Kubernetes in production environment is a good target to aim >>> for. Many of the underlying components are shared, which should make things >>> a bit easier. > I do not disagree, I would rather advise that this be a tad sideline > project, instead of a full blown DebOps path, unless there are real needs > and people having the budgets for those equipment “sponsoring” this part of > the project ;) I know that DebOps is used in very diverse environments, from cloud providers to local installations with their own hardware. I want to use it to manage on-premises infrastructure of a large university I'm working at, so focus on on-premises and clustered environments is definitely on point for me.