[ovirt-users] ovirt high points
Johan Bernhardsson
johan at kafit.se
Thu Sep 7 20:09:10 UTC 2017
On September 7, 2017 19:01:58 Christopher Cox <ccox at endlessnow.com> wrote:
>
>>
>> Any links or ideas appreciated,
>
> oVirt is NOT VMware. But if you do things "well" oVirt works quite
> well. Follow the list to see folks that didn't necessarily do things
> "well" (sad, but true).
>
> I inherited this oVirt... not ideal for blades because it's better to
> have lots of networks. We just have two blade fabrics, one for SAN and
> one for the rest, and it would be nice to have ovirtmgmt and migration
> networks be isolated. With that said, with our massively VLAN'd setup,
> it does work and has been very reliable. For performance reasons, I
> recommend that you attempt to dedicate a host for SPM, or at least keep
> the number of VMs deployed there to a minimum. There are tweaks in the
> setup to keep VMs off the SPM node (talking mainly if you have a
> massively combined network like I have currently).
>
> We've survived many bad events with regards to SAN and power, which is a
> tribute to oVirt's reliability. However, you can shoot yourself in the
> foot very easily with oVirt... so just be careful.
>
> Is VMware better? Yes. Is it more flexible than oVirt? Yes. Is it
> more reliable than oVirt? Yes. In other words, if money is of no
> concern, VMware and VCenter.
>
> We will likely never do VMware here due to cost (noting, that the cost
> is in VCenter, and IMHO, it's not horrible, but I do not control the
> wallet here, and we tend to prefer FOSS here... and FOSS is my personal
> preference as well).
>
> Companies generally speaking just want something that works. And oVirt
> does work. But if money is of no concern and you need the friendliness
> of something VCenter like (noting that not everyone needs VCenter or
> RHEV-M or oVirt Manager), then VMware is still better.
>
> If you don't need something VCenter like, I can also so say that libvirt
> (KVM) and virt-manager is also reasonable, and we use that as well. But
> we also have a (free) ESXi (because we have to, forced requirement).
>
> The ovirtmgmt web ui is gross IMHO. It's a perfect example of an
> overweight UI where a simplified UI would have been cleaner, faster and
> better. Just because you know how to write thousands of lines of
> javascript doesn't mean you should. Not everything needs to act like a
> trading floor application or facebook. The art of efficient UI design
> has been lost. With that said, the RESTful i/f part is nice. Nice to
> the point of not needing the SDK.
>
> Finally, VMware can be expensive. It's not a "one time" purchase. It's
> HAS TO BE ongoing. And it can get very expensive if not understood.
> With that said, if you have anything Microsoft in the enterprise, you
> already understand and are prepared to throw cash for IT infrastructure.
> If you do go VMware, make sure to use a hefty Vcenter host as upgrades
> to VCenter involve a lot of bloat and waste.
>
> VMware can be a real "pain" support wise. They can deprecate your
> entire hypervisor HW stack, especially true in a major release. They
> can even deprecate HW in a minor release (I have fallen victim to this).
>
> Thus, again, if you have money to burn and have relatively short HW life
> cycles (less than 5 years for sure), AND that includes OS life cycles as
> well, then VMware is probably ok. Not saying there aren't some problems
> on the oVirt side as well, just saying VMware has more expensive warts.
> And thus "paid support" becomes somewhat humorous (but in a sad sort of
> way).
>
> (oVirt community support ROCKS! Just saying...)
>From my work with both VMware and ovirt. I must say that the ovirt 4.1
installations I have is more reliable that the vsphere/vcenter
installations I maintain.
But the key is to do it well. That applies to any virtualization solution.
If you plan wrong and just throw it in you will have problems.
I use ovirt 4.1.* and gluster as a Backend. And the many things I thought
about in loads of ways has made it rock solid. As a separate vlan for
storage and migration and one for ovirtmanagement.
And yes this is an awesome community :)
/Johan
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