On Mon, Jun 26, 2017 at 1:16 AM, Vinícius Ferrão <ferrao@if.ufrj.br> wrote:
Hello again,

Setting the folder permissions to vdsm:kvm (36:36) done the trick to make NFS work. I wasn't expecting this to work since it does not make sense to me, making a parallel with the iSCSI problem.

I'm starting to believe that's something just bad. Perhaps the Storage system is running with something broken or the host machine is just unstable.

I will consider this as solved, since further inside the oVirt Engine panel I was able to mount and use the same iSCSI sharing.

But let me ask for sincere answers here:

1. oVirt is feature complete comparing to RHEV?

Yes. In fact it may have additional features unavailable in RHV.
 

2. Should I migrate from XenServer to oVirt? This is biased, I know, but I would like to hear opinions. The folks with @redhat.com email addresses will know how to advocate in favor of oVirt.

I don't know, and I don't think (having a @redhat.com email myself) I should advocate.
If someone made a comparison (even if it's just for their own specific use case), it could be great if it could be shared. If you do - please share your thoughts.
 

3. Some "journalists" says that oVirt is like Fedora in comparison to RHEL, is this really true? Or it's more aligned with a CentOS-like release? Because Fedora isn't really an Enterprise OS, and I was looking for an Enterprise Hypervisor. I'm aware that oVirt is the upstream from RHEV.

I'd cautiously say 'in between'. We strive to ensure oVirt is stable, and I believe we make good progress in every release. 
We also make an effort to quickly release fixes (minor releases). That being said, RHV has a longer life cycle, and for example, when oVirt stopped releasing oVirt 3.6.x, Red Hat continued to release minor versions of it.

We have hundreds of oVirt users running it in production, many in large scale, with mission critical workloads.

Lastly, oVirt  enables features in upstream before they are delivered in RHV. 

(That being said, I've had a very good experience with Fedora 24 which was rock solid for me, then I've had some misfortune with Fedora 25, and now I'm assessing if I should upgrade to F26 beta...)


4. There is any good SPICE client for macOS? Or should I just use the HTML5 version instead?

I'm afraid not.
Y.
 

Thanks,
V.

Sent from my iPhone

On 23 Jun 2017, at 18:50, Yaniv Kaul <ykaul@redhat.com> wrote:



On Sat, Jun 24, 2017 at 12:23 AM, Vinícius Ferrão <ferrao@if.ufrj.br> wrote:
Hello Adam and Karli,

I will remap uid and gid of NFS to 36 and try again with NFS sharing.

But this does not make much sense, because on iSCSI this should not happen. There are no permissions involved and when oVirt runs the hosted-engine setup it creates the ext3 filesystem on the iSCSI share without any issue. Here’s a photo of the network bandwidth during the OVF deployment: http://www.if.ufrj.br/~ferrao/ovirt/bandwidth-iscsi-ovf.jpg

So it’s appears to be working. Something happens after the deployment that brokes the connections and kills vdsm.

Indeed - may be two different issues. Let us know how the NFS works first, then let's try with iSCSI.
Y.
 

Thanks,
V.

On 23 Jun 2017, at 17:47, Adam Litke <alitke@redhat.com> wrote:



On Fri, Jun 23, 2017 at 4:40 PM, Karli Sjöberg <karli@inparadise.se> wrote:


Den 23 juni 2017 21:08 skrev Vinícius Ferrão <ferrao@if.ufrj.br>:
Hello oVirt folks.

I’m a traitor of the Xen movement and was looking for some good alternatives for XenServer hypervisors. I was aware of KVM for a long time but I was missing a more professional and appliance feeling of the product, and oVirt appears to deliver exactly what I’m looking for.

Don’t get me wrong, I’m not saying that Xen is not good, I’m looking for equal or better alternatives, but I’m starting to get frustrated with oVirt.

Firstly I’ve tried to install the oVirt Node on a VM in VMware Fusion on my notebook, it was a no go. For whatever reasons I don’t know vdsmd.service and libvirtd failed to start. I make sure that I was running with EPT support enabled to achieve nested virtualization, but as I said: it was a no go.

So I’ve decommissioned a XenServer machine that was in production just to try oVirt. The hardware is not new, but’s it’s very capable: Dual Xeon E5506 with 48GB of system RAM, but I can’t get the hosted engine to work, it always insults my hardware: --- Hosted Engine deployment failed: this system is not reliable, please check the issue,fix and redeploy.

It’s definitely a problem on the storage subsystem, the error is just random, at this moment I’ve got:

[ ERROR ] Failed to execute stage 'Misc configuration': [-32605] No response for JSON-RPC StorageDomain.detach request.

But on other tries it came up with something like this:

No response for JSON-RPC Volume.getSize request.

I was thinking that the problem was on the NFSv3 server on our FreeNAS box, so I’ve changed to an iSCSI backend, but the problem continues.
Can't say anything about your issues without the logs but there's nothing wrong with FreeNAS (FreeBSD) NFS, I've been running oVirt with FreeBSD's NFS since oVirt 3.2 so...

Could you share your relevant exports configuration to make sure he's using something that you know works?
 

"You're holding it wrong":) Sorry, I know you're frustrated but that's what I can add to the conversation.

/K

This happens at the very end of the ovirt-hosted-engine-setup command, which leads me to believe that’s an oVirt issue. The OVA was already copied and deployed to the storage:

[ INFO ] Starting vdsmd
[ INFO ] Creating Volume Group
[ INFO ] Creating Storage Domain
[ INFO ] Creating Storage Pool
[ INFO ] Connecting Storage Pool
[ INFO ] Verifying sanlock lockspace initialization
[ INFO ] Creating Image for 'hosted-engine.lockspace' ...
[ INFO ] Image for 'hosted-engine.lockspace' created successfully
[ INFO ] Creating Image for 'hosted-engine.metadata' ...
[ INFO ] Image for 'hosted-engine.metadata' created successfully
[ INFO ] Creating VM Image
[ INFO ] Extracting disk image from OVF archive (could take a few minutes depending on archive size)
[ INFO ] Validating pre-allocated volume size
[ INFO ] Uploading volume to data domain (could take a few minutes depending on archive size)
[ INFO ] Image successfully imported from OVF
[ ERROR ] Failed to execute stage 'Misc configuration': [-32605] No response for JSON-RPC StorageDomain.detach request.
[ INFO ] Yum Performing yum transaction rollback
[ INFO ] Stage: Clean up
[ INFO ] Generating answer file '/var/lib/ovirt-hosted-engine-setup/answers/answers-20170623032541.conf'
[ INFO ] Stage: Pre-termination
[ INFO ] Stage: Termination
[ ERROR ] Hosted Engine deployment failed: this system is not reliable, please check the issue,fix and redeploy
Log file is located at /var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20170623023424-o9rbt0.log

At this point I really don’t know what I should try. And the log file is too verborragic (hoping this word exists) to look for errors.

Any guidance?

Thanks,
V.

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--
Adam Litke


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