Re: [ovirt-users] Frustration defines the deployment of Hosted Engine

[Adam Litke]

On Mon, Jun 26, 2017 at 4:04 AM, Ben De Luca  wrote:

> Is there some way to make vnc/web the default for each vk. Oh I have
> searched and not found. :/
>

I feel like there used to be a way to do this at the cluster level but I
also could not find it.  Your best bet would be to configure VM templates
and set the console to vnc there.


>
>
> On Mon, 26 Jun 2017 at 8:35 am, Fabrice Bacchella <
> fabrice.bacche...@orange.fr> wrote:
>
>>
>>
>> 4. There is any good SPICE client for macOS? Or should I just use the
>>> HTML5 version instead?
>>>
>>
>> I'm afraid not.
>> Y.
>>
>>
>> There is one spice client, RemoveViewer, but I will not call it good,
>> it's very slow. So I tend to use the embedded vnc viewer.
>>
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Re: [ovirt-users] "Could not detect Guest Agent on VM"

[Tomáš Golembiovský]

Hi,

sorry for late answer.

On Mon, 12 Jun 2017 11:26:51 -0500
Sven Achtelik  wrote:

> Hi All,
> 
> I have several Windows VMs (Server 2012, Server 2012 R2) running and the 
> guest tools are installed. IF I go and check the Services in those VMs I can 
> also see the "Ovirt Guest Service" running and the "QEMU Guest Agent" 
> running. Also there is Information about the VM show in the GUI, like 
> installed applications etc.. I've tried several Versions of the tools and 
> even with the latest 4.1.5 I can't get that message to disappear.

First check if the virtio-serial driver is properly installed. In Device
Manager you should see VirtIO Serial Driver in System devices category.

You should also check the oVirt GA log. Search for
ovirt-guest-agent.log, it should be in C:\Windows\SysWOW64. 

> Am I doing something wrong ?
> 
> How does this affect the Backup-API and possible Snapshots are taken for 
> Backups ?

I'm not sure about this one. I don't think we use QEMU GA (or any other
GA) to freeze filesystems. So this feature should not be affected.

Tomas

> 
> If you have any hints please let me know.
> 
> Thank you,
> 
> Sven
> 


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Re: [ovirt-users] Hot Memory add and Physical Memory guaranteed

[Milan Zamazal]

"Luca 'remix_tj' Lorenzetto"  writes:

> On Fri, Jun 23, 2017 at 11:16 AM, Milan Zamazal  wrote:
>> "Luca 'remix_tj' Lorenzetto"  writes:
>>
>>> i just tested the memory hot add to a vm. This vm had 2048 MB. I set
>>> the new memory to 2662 MB.
>>> I logged into the vm and i've seen that hasn't been any memory change,
>>> even if i said to the manager to apply memory expansion immediately.
>>>
>>> Memory shown by free -m is 1772 MB.
>>
>> [...]
>>
>>> forgot to say that is a RHEL 7 VM and has the memory baloon device enabled.
>>
>> This is normal with memory balloon enabled – memory balloon often
>> "consumes" the hot plugged memory, so you can't see it.
>
> Ok.
>
> What's exactly the role of "guaranteed memory"? Is only about ensuring
> on startup time that there is at least X free memory on hosts or
> something more complex?

I think it defines the minimum memory that the balloon should always
leave available.

Martin, do you know answers to the other questions?

> What's the best configuration? keeping baloon or not? setting memory
> and guaranteed memory to the same value?
> If i have 1TB of ram in all the cluster, does the "guaranteed memory"
> doesn't allows to provision vms with cumulative guaranteed memory
> usage greater than 1TB?
> Can KSM help allow to overprovision in this situation?
>
> Does memory baloon device has impacts on vm performance?
>
> I need to understand better in order to plan correctly all the
> required hardware resource i need for migrating to oVirt.
>
> Luca
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Re: [ovirt-users] Hot Memory add and Physical Memory guaranteed

[Martin Sivak]

> What's exactly the role of "guaranteed memory"? Is only about ensuring
> on startup time that there is at least X free memory on hosts or
> something more complex?

As Milan said, it tells the balloon the lower limit of ballooning. We
won't take more memory from the VM when it reaches this amount of
assigned memory. It is not related to VM start, but to runtime.

It is important to realize that both overcommit features (KSM,
ballooning) require that the full VM can be started first. Only then
will KSM start deduplicating pages and balloon inflating.

That is why we recommend swap to be present and enabled on a host
although it won't be really used, it just provides a buffer space
before the VM is compacted.

> What's the best configuration? keeping baloon or not? setting memory
> and guaranteed memory to the same value?

Setting the two fields to the same value effectively disables
ballooning for the VM.

> If i have 1TB of ram in all the cluster, does the "guaranteed memory"
> doesn't allows to provision vms with cumulative guaranteed memory
> usage greater than 1TB?

No, the memory field itself behaves like this. You can allow the
consumption go higher by defining memory overcommit ratio (in Edit
Cluster dialog). Guaranteed memory is only used for controlling
balloon limits.

> Can KSM help allow to overprovision in this situation?

KSM is complementary to ballooning in this case. Both features allow
over commit to work.

- KSM needs no cooperation of the VM, but scanning for duplicate pages
loads the host
- ballooning needs cooperation of the VM (driver + guest agent)

> Does memory baloon device has impacts on vm performance?

Well the device itself does not impose any load. But when you take
some memory from the VM, it will have obviously less resources. If the
VM tends to allocate huge amount of memory in short time then the
balloon might be slow in returning the memory to the VM and the
application might not be happy about it.


Best regards

Martin Sivak

On Fri, Jun 23, 2017 at 11:58 AM, Luca 'remix_tj' Lorenzetto
 wrote:
> On Fri, Jun 23, 2017 at 11:16 AM, Milan Zamazal  wrote:
>> "Luca 'remix_tj' Lorenzetto"  writes:
>>
>>> i just tested the memory hot add to a vm. This vm had 2048 MB. I set
>>> the new memory to 2662 MB.
>>> I logged into the vm and i've seen that hasn't been any memory change,
>>> even if i said to the manager to apply memory expansion immediately.
>>>
>>> Memory shown by free -m is 1772 MB.
>>
>> [...]
>>
>>> forgot to say that is a RHEL 7 VM and has the memory baloon device enabled.
>>
>> This is normal with memory balloon enabled – memory balloon often
>> "consumes" the hot plugged memory, so you can't see it.
>
> Ok.
>
> What's exactly the role of "guaranteed memory"? Is only about ensuring
> on startup time that there is at least X free memory on hosts or
> something more complex?
>
> What's the best configuration? keeping baloon or not? setting memory
> and guaranteed memory to the same value?
> If i have 1TB of ram in all the cluster, does the "guaranteed memory"
> doesn't allows to provision vms with cumulative guaranteed memory
> usage greater than 1TB?
> Can KSM help allow to overprovision in this situation?
>
> Does memory baloon device has impacts on vm performance?
>
> I need to understand better in order to plan correctly all the
> required hardware resource i need for migrating to oVirt.
>
> Luca
>
> --
> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare
> calcoli che potrebbero essere affidati a chiunque se si usassero delle
> macchine"
> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)
>
> "Internet è la più grande biblioteca del mondo.
> Ma il problema è che i libri sono tutti sparsi sul pavimento"
> John Allen Paulos, Matematico (1945-vivente)
>
> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , 
> 
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Re: [ovirt-users] oVirt Live USB3 question

[Lev Veyde]

Hi Michael,

oVirt-Live's basically functions as any other LiveCD, so no special
differences here.
Generally it means that necessary kernel/kernel modules/programs are loaded
into RAM, and access to the image is needed if e.g. one wants to run some
more programs.
All writes are done into RAM.

Note however that since the whole CD isn't copied into RAM, so you still
need it to be accessible, e.g. have the USB DOK be inserted into the
computer.

As you already mentioned the oVirt-Live is designed to work in a sandboxed
environment as far as the network is concerned.
It was never designed nor tested to work with i.e. external storages, as in
order to do so the network configuration will have to be modified.

Regarding performance: we haven't tested it, but probably the oVirt-Live
may take a bit more time to load when compared to normal installation.
This is because USB DOKs are generally slower than SAS/SATA HDDs/SSDs.
Once loaded however the performance will be similar and in some cases even
greater, since all writes are done to the RAM.
The price of this is of course that once the system is rebooted for
whatever reason all data is lost.

Hope it helped,

On Sat, Jun 24, 2017 at 5:10 AM, Michael McConachie <
michael.mcconac...@hotmail.com> wrote:

> Hi all,
>
>
> Potentially stupid question here. Sorry in advance if so.  I have always
> built out full blown multi rack instances of oVirt, and RHEV for clients,
> but the following question has me wondering before I go digging and trying
> it out...
>
>
> I realize that the oVirtLive ISO is for demo purposes, sandboxing, and not
> production: I have a client, who is in need of a bootable AIO-based USB
> install with the caveat of being able to connect to the computer's HD and
> other external storage at that point (for the Storage and ISO domains that
> I'll create afterwards).  This is because they have one BM to work with and
> they don't want the extra overhead using an SSD HD slot. They don't want to
> use a Sata DOM either if possible.
>
> In saying that, and concerning the oVirt LiveISO capabilities - I have two
> questions.
>
>
> - Does the AIO USB install load necessary runtimes into memory, similar to
> esxi bootable USBs and utilize the base hardware afterwards so that the
> rest of the operations are ran in memory, hitting the disk (USB in this
> case) like a normal OS load when needed for kernel calls, etc..??
>
> - Are there a terrible performance costs if we stay with USB3 (which has a
> ridiculous theoretical speed in certain hardware matching situations)?
>
>
> Thanks in advance for anyone who might have already crossed this bridge
> and can provide insight.
>
>
>
> Michael J. McConachie | keys.fedoraproject.org | PubKey: 0x7BCD88F8
>
> *NOTE: The information included and/or attached in this electronic mail
> transmission may contain confidential or privileged information and is
> intended solely for the addressee(s). Any unauthorized disclosure,
> reproduction, distribution or the taking of action in reliance on the 
> **contents
> of the information are strictly prohibited. If you have received the
> message in error, please notify the sender by reply transmission and delete
> the message without copying, disclosing or forwarding.*
>
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Software Engineer, RHCE | RHCVA | MCITP

Red Hat Israel



l...@redhat.com | lve...@redhat.com

TRIED. TESTED. TRUSTED. 
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Re: [ovirt-users] [Gluster-users] Very poor GlusterFS performance

[Chris Boot]

On 21/06/17 11:18, Chris Boot wrote:
> Thanks for your input. I have yet to run any benchmarks, but I'll do
> that once I have a bit more time to work on this.

Is there a particular benchmark test that I should run to gather some
stats for this? Would certain tests be more useful than others?

Thanks,
Chris

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[ovirt-users] Empty cgroup files on centos 7.3 host

[Florian Schmid]

Hi,

I wanted to monitor disk IO and R/W on all of our oVirt centos 7.3 hypervisor 
hosts, but it looks like that all those files are empty.
For example:
ls -al 
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\\x2d14\\x2dHostedEngine.scope/
insgesamt 0
drwxr-xr-x.  2 root root 0 30. Mai 10:09 .
drwxr-xr-x. 16 root root 0 26. Jun 09:25 ..
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_merged
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_merged_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_queued
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_queued_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_service_bytes
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_service_bytes_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_serviced
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_serviced_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_service_time
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_service_time_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_wait_time
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.io_wait_time_recursive
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.leaf_weight
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.leaf_weight_device
--w---.  1 root root 0 30. Mai 10:09 blkio.reset_stats
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.sectors
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.sectors_recursive
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.io_service_bytes
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.io_serviced
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.read_bps_device
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.read_iops_device
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.write_bps_device
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.throttle.write_iops_device
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.time
-r--r--r--.  1 root root 0 30. Mai 10:09 blkio.time_recursive
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.weight
-rw-r--r--.  1 root root 0 30. Mai 10:09 blkio.weight_device
-rw-r--r--.  1 root root 0 30. Mai 10:09 cgroup.clone_children
--w--w--w-.  1 root root 0 30. Mai 10:09 cgroup.event_control
-rw-r--r--.  1 root root 0 30. Mai 10:09 cgroup.procs
-rw-r--r--.  1 root root 0 30. Mai 10:09 notify_on_release
-rw-r--r--.  1 root root 0 30. Mai 10:09 tasks


I thought, I can get my needed values from there, but all files are empty.

Looking at this post: 
http://lists.ovirt.org/pipermail/users/2017-January/079011.html
this should work.

Is this normal on centos 7.3 with oVirt installed? How can I get those values, 
without monitoring all VMs directly?

oVirt Version we use:
4.1.1.8-1.el7.centos

BR Florian
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Re: [ovirt-users] Frustration defines the deployment of Hosted Engine

[Ben De Luca]

Is there some way to make vnc/web the default for each vk. Oh I have
searched and not found. :/


On Mon, 26 Jun 2017 at 8:35 am, Fabrice Bacchella <
fabrice.bacche...@orange.fr> wrote:

>
>
> 4. There is any good SPICE client for macOS? Or should I just use the
>> HTML5 version instead?
>>
>
> I'm afraid not.
> Y.
>
>
> There is one spice client, RemoveViewer, but I will not call it good, it's
> very slow. So I tend to use the embedded vnc viewer.
>
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Re: [ovirt-users] Very big device. Trying to use READ CAPACITY

[Iman Darabi]

ok. thank you yaniv, Now, I know, where is the origin of the problem. I'll
try to fix it.

On Mon, Jun 26, 2017 at 11:52 AM, Yaniv Kaul  wrote:

>
>
> On Sun, Jun 25, 2017 at 8:17 PM, Iman Darabi 
> wrote:
>
>> i didn't configured any thing and let ovirt configure storage
>> automatically. should i configure multipath manually?
>>
>
> Usually not, but for ALUA you might want to.
> Y.
>
>
>>
>> On Sun, Jun 25, 2017 at 3:06 PM, Yaniv Kaul  wrote:
>>
>>>
>>>
>>> On Sun, Jun 25, 2017 at 11:25 AM, Iman Darabi 
>>> wrote:
>>>
 i can not add second lun, this is my problem. when ever i try to add
 lun i get that message ... .

 Jun 25 12:51:55 compute52 kernel: sd 12:0:0:16384: [sdf] Very big
 device. Trying to use READ CAPACITY(16).
 Jun 25 12:51:55 compute52 kernel: sd 5:0:0:0: [sdb] Very big device.
 Trying to use READ CAPACITY(16).
 Jun 25 12:51:55 compute52 kernel: sd 12:0:1:16384: [sdg] Very big
 device. Trying to use READ CAPACITY(16).
 Jun 25 12:51:55 compute52 kernel: sd 5:0:1:0: [sdc] Very big device.
 Trying to use READ CAPACITY(16).
 Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Read Capacity(10)
 failed: Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
 Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Sense Key :
 Illegal Request [current]
 Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Add. Sense:
 Logical unit not supported
 Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Read Capacity(10)
 failed: Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
 Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Sense Key :
 Illegal Request [current]
 Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Add. Sense:
 Logical unit not supported
 Jun 25 12:51:56 compute52 kernel: device-mapper: table: 253:14:
 multipath: error getting device
 Jun 25 12:51:56 compute52 kernel: device-mapper: ioctl: error adding
 target to table
 Jun 25 12:51:56 compute52 multipathd: dm-14: remove map (uevent)
 Jun 25 12:51:56 compute52 multipathd: dm-14: remove map (uevent)

 mybe i've problem with multipath ... ?!.

>>>
>>> I think so. Is ALUA correctly configured?
>>> I'd try to connect with oVirt and see that all works well first.
>>> Y.
>>>
>>>


 On Sun, Jun 25, 2017 at 12:38 PM, Yaniv Kaul  wrote:

>
>
> On Sun, Jun 25, 2017 at 10:51 AM, Iman Darabi 
> wrote:
>
>> my os version is:
>>   Operating System: CentOS Linux 7 (Core)
>>   CPE OS Name: cpe:/o:centos:centos:7
>>   Kernel: Linux 3.10.0-327.28.3.el7.x86_64
>>   Architecture: x86-64
>> and san storage is EMC VNX 5400 with double cisco mds 9148s.
>>
>>
> I completely forgot to ask, is there a real problem besides those
> messages?
> See [1] - appears to be harmless.
> Y.
>
> [1] https://bugzilla.kernel.org/show_bug.cgi?id=115351
>
>
>> actually i had problem with one of my switches and sent it to garanty
>> guarantee. now i set it up again ... . but i get these errors from dmesg:
>> [20258845.245029] sd 12:0:0:16384: [sdf] Very big device. Trying to
>> use READ CAPACITY(16).
>> [20258845.245454] sd 5:0:0:0: [sdb] Very big device. Trying to use
>> READ CAPACITY(16).
>> [20258845.246554] sd 12:0:1:16384: [sdg] Very big device. Trying to
>> use READ CAPACITY(16).
>> [20258845.246650] sd 5:0:1:0: [sdc] Very big device. Trying to use
>> READ CAPACITY(16).
>> [20258845.248915] sd 12:0:0:0: [sdd] Read Capacity(10) failed:
>> Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
>> [20258845.248919] sd 12:0:0:0: [sdd] Sense Key : Illegal Request
>> [current]
>> [20258845.248922] sd 12:0:0:0: [sdd] Add. Sense: Logical unit not
>> supported
>> [20258845.249561] sd 12:0:1:0: [sde] Read Capacity(10) failed:
>> Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
>> [20258845.249564] sd 12:0:1:0: [sde] Sense Key : Illegal Request
>> [current]
>> [20258845.249565] sd 12:0:1:0: [sde] Add. Sense: Logical unit not
>> supported
>> [20258845.285583] device-mapper: table: 253:14: multipath: error
>> getting device
>> [20258845.286019] device-mapper: ioctl: error adding target to table
>>
>> here is output of HBA configurations:
>>
>> [root@compute52 host12]# multipath -ll
>> 3600601604d003a00036e268de611 dm-2 DGC ,VRAID
>> size=2.0T features='1 retain_attached_hw_handler' hwhandler='1 alua'
>> wp=rw
>> |-+- policy='service-time 0' prio=50 status=active
>> | `- 5:0:1:0  sdc 8:32  active ready  running
>> `-+- policy='service-time 0' prio=10 status=enabled
>>   `- 5:0:0:0  sdb 8:16  active ready  running
>> ==
>> [root@compute52 

Re: [ovirt-users] Frustration defines the deployment of Hosted Engine

[InterNetX - Juergen Gotteswinter]

> 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.
> 

in term of reliability, better stay with xenserver
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Re: [ovirt-users] migrating VMS from old hosted engine to new hosted engine

[Yanir Quinn]

This might give you some additional information if you haven't seen it yet :

https://www.ovirt.org/documentation/how-to/hosted-engine/

Regards,
Yanir Quinn

On Fri, Jun 23, 2017 at 1:13 AM, Paul Groeneweg | Pazion 
wrote:

> We are moving our VMs from an old 3.6 oVirt platform to a new oVirt 4.1
> platform.
>
> I am looking for an easy way to migrate the VMs. ( I know about export
> domain, but this takes 2 times a copy action ) I tested and just detaching
> the Data domain and attaching it, didn't work.
>
> Then I found the VM import option:
>  - Adding a ssh key gen and setting password on virsh
> - load a list of machines in the webinterface from VM import
> - when I start an import the system complains:
> The following VMs retrieved from external server
> qemu+ssh://r...@xxx.xxx.xxx.xxx/system are not in down status: VM
> [VM-NAME].
> - I tried to suspend the VM, but this didn;t work either ( same error )
> - Problem is ,when VM is shutdown, it disappears from this system list.
>
> Is there a way to directly import a VM from old oVirt platform to the new
> platform
>
> Looking forward to find a solution to quickly migrate our VMs.
>
> Best Regards,
>
> Paul Groeneweg
>
>
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Re: [ovirt-users] migrating VMS from old hosted engine to new hosted engine

[Yaniv Kaul]

On Fri, Jun 23, 2017 at 1:13 AM, Paul Groeneweg | Pazion 
wrote:

> We are moving our VMs from an old 3.6 oVirt platform to a new oVirt 4.1
> platform.
>
> I am looking for an easy way to migrate the VMs. ( I know about export
> domain, but this takes 2 times a copy action ) I tested and just detaching
> the Data domain and attaching it, didn't work.
>
>
It should work, and is the easiest way by far. Can you share more details
on what did not work for you?
Y.


> Then I found the VM import option:
>  - Adding a ssh key gen and setting password on virsh
> - load a list of machines in the webinterface from VM import
> - when I start an import the system complains:
> The following VMs retrieved from external server
> qemu+ssh://r...@xxx.xxx.xxx.xxx/system are not in down status: VM
> [VM-NAME].
> - I tried to suspend the VM, but this didn;t work either ( same error )
> - Problem is ,when VM is shutdown, it disappears from this system list.
>
> Is there a way to directly import a VM from old oVirt platform to the new
> platform
>
> Looking forward to find a solution to quickly migrate our VMs.
>
> Best Regards,
>
> Paul Groeneweg
>
>
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Re: [ovirt-users] Frustration defines the deployment of Hosted Engine

[Yaniv Kaul]

On Mon, Jun 26, 2017 at 1:16 AM, Vinícius Ferrão  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  wrote:
>
>
>
> On Sat, Jun 24, 2017 at 12:23 AM, Vinícius Ferrão 
> 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  wrote:
>>
>>
>>
>> On Fri, Jun 23, 2017 at 4:40 PM, Karli Sjöberg 
>> wrote:
>>
>>>
>>>
>>> Den 23 juni 2017 21:08 skrev Vinícius Ferrão :
>>>
>>> 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 

[ovirt-users] Storage, extend or new lun ?

[Enrico Becchetti Gmail]

Dear All,
I've oVirt 3.5.3-1-1.el6 with two kind of storage , NFS and Fibre 
Channel.  Each Hypervisor
has HBA controller and Data CLutser has four Storage named: DATA_FC, 
DATA_NFS, EXPORT

and ISO-DOMAIN.

Anybody know how can I extend a DATA_FC ? Which is the best practies ?
Extend LUN from HP MSA controller or adding a new lun ?
if I extend lun inside HP MSA oVirt see the new size ?
Enrico
Thanks a lot.
Best Regards

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Re: [ovirt-users] Very big device. Trying to use READ CAPACITY

[Yaniv Kaul]

On Sun, Jun 25, 2017 at 8:17 PM, Iman Darabi  wrote:

> i didn't configured any thing and let ovirt configure storage
> automatically. should i configure multipath manually?
>

Usually not, but for ALUA you might want to.
Y.


>
> On Sun, Jun 25, 2017 at 3:06 PM, Yaniv Kaul  wrote:
>
>>
>>
>> On Sun, Jun 25, 2017 at 11:25 AM, Iman Darabi 
>> wrote:
>>
>>> i can not add second lun, this is my problem. when ever i try to add lun
>>> i get that message ... .
>>>
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:0:16384: [sdf] Very big
>>> device. Trying to use READ CAPACITY(16).
>>> Jun 25 12:51:55 compute52 kernel: sd 5:0:0:0: [sdb] Very big device.
>>> Trying to use READ CAPACITY(16).
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:1:16384: [sdg] Very big
>>> device. Trying to use READ CAPACITY(16).
>>> Jun 25 12:51:55 compute52 kernel: sd 5:0:1:0: [sdc] Very big device.
>>> Trying to use READ CAPACITY(16).
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Read Capacity(10)
>>> failed: Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Sense Key : Illegal
>>> Request [current]
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:0:0: [sdd] Add. Sense: Logical
>>> unit not supported
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Read Capacity(10)
>>> failed: Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Sense Key : Illegal
>>> Request [current]
>>> Jun 25 12:51:55 compute52 kernel: sd 12:0:1:0: [sde] Add. Sense: Logical
>>> unit not supported
>>> Jun 25 12:51:56 compute52 kernel: device-mapper: table: 253:14:
>>> multipath: error getting device
>>> Jun 25 12:51:56 compute52 kernel: device-mapper: ioctl: error adding
>>> target to table
>>> Jun 25 12:51:56 compute52 multipathd: dm-14: remove map (uevent)
>>> Jun 25 12:51:56 compute52 multipathd: dm-14: remove map (uevent)
>>>
>>> mybe i've problem with multipath ... ?!.
>>>
>>
>> I think so. Is ALUA correctly configured?
>> I'd try to connect with oVirt and see that all works well first.
>> Y.
>>
>>
>>>
>>>
>>> On Sun, Jun 25, 2017 at 12:38 PM, Yaniv Kaul  wrote:
>>>


 On Sun, Jun 25, 2017 at 10:51 AM, Iman Darabi 
 wrote:

> my os version is:
>   Operating System: CentOS Linux 7 (Core)
>   CPE OS Name: cpe:/o:centos:centos:7
>   Kernel: Linux 3.10.0-327.28.3.el7.x86_64
>   Architecture: x86-64
> and san storage is EMC VNX 5400 with double cisco mds 9148s.
>
>
 I completely forgot to ask, is there a real problem besides those
 messages?
 See [1] - appears to be harmless.
 Y.

 [1] https://bugzilla.kernel.org/show_bug.cgi?id=115351


> actually i had problem with one of my switches and sent it to garanty
> guarantee. now i set it up again ... . but i get these errors from dmesg:
> [20258845.245029] sd 12:0:0:16384: [sdf] Very big device. Trying to
> use READ CAPACITY(16).
> [20258845.245454] sd 5:0:0:0: [sdb] Very big device. Trying to use
> READ CAPACITY(16).
> [20258845.246554] sd 12:0:1:16384: [sdg] Very big device. Trying to
> use READ CAPACITY(16).
> [20258845.246650] sd 5:0:1:0: [sdc] Very big device. Trying to use
> READ CAPACITY(16).
> [20258845.248915] sd 12:0:0:0: [sdd] Read Capacity(10) failed: Result:
> hostbyte=DID_OK driverbyte=DRIVER_SENSE
> [20258845.248919] sd 12:0:0:0: [sdd] Sense Key : Illegal Request
> [current]
> [20258845.248922] sd 12:0:0:0: [sdd] Add. Sense: Logical unit not
> supported
> [20258845.249561] sd 12:0:1:0: [sde] Read Capacity(10) failed: Result:
> hostbyte=DID_OK driverbyte=DRIVER_SENSE
> [20258845.249564] sd 12:0:1:0: [sde] Sense Key : Illegal Request
> [current]
> [20258845.249565] sd 12:0:1:0: [sde] Add. Sense: Logical unit not
> supported
> [20258845.285583] device-mapper: table: 253:14: multipath: error
> getting device
> [20258845.286019] device-mapper: ioctl: error adding target to table
>
> here is output of HBA configurations:
>
> [root@compute52 host12]# multipath -ll
> 3600601604d003a00036e268de611 dm-2 DGC ,VRAID
> size=2.0T features='1 retain_attached_hw_handler' hwhandler='1 alua'
> wp=rw
> |-+- policy='service-time 0' prio=50 status=active
> | `- 5:0:1:0  sdc 8:32  active ready  running
> `-+- policy='service-time 0' prio=10 status=enabled
>   `- 5:0:0:0  sdb 8:16  active ready  running
> ==
> [root@compute52 host12]# systool -c fc_host
> Class = "fc_host"
>
>   Class Device = "host12"
> Device = "host12"
>
>   Class Device = "host5"
> Device = "host5"
> ==
> [root@compute52 host12]# systool -c fc_host -v 

Re: [ovirt-users] Frustration defines the deployment of Hosted Engine

[Fabrice Bacchella]

> 4. There is any good SPICE client for macOS? Or should I just use the HTML5 
> version instead?
> 
> I'm afraid not.
> Y.

There is one spice client, RemoveViewer, but I will not call it good, it's very 
slow. So I tend to use the embedded vnc viewer.

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Re: [ovirt-users] VM live migration and NFS 4.2

[Markus Stockhausen]

Hi,

its an Centos based NFS. Yes I have SELinux permissions nfs_t active. Otherwise 
sanlock fails immediately after storage domain activation.

Maybe another SELinux option or some kind of new locking?

Markus

Am 26.06.2017 9:22 vorm. schrieb Yaniv Kaul :


On Sun, Jun 25, 2017 at 10:31 PM, Markus Stockhausen 
> wrote:
Hi,

we are currently evaluating NFS 4.2 based storage for OVirt 4.1.2. Normal 
operation
and discard support work like a charm.

For some strange reason we cannot use VM live migration any more. As soon as one
NFS 4.2 based VM disk is doing disk I/O during the operation. VM stalls and is 
paused.
It seems as if qemu on target node cannot take over disk images. See BZ1464787.

Can you make sure you are not suffering from any SELinux issues?
What NFS server are you using? If it's Linux based, it needs some selinux 
commands.
For example (from ovirt-system-tests):
semanage fcontext -a -t nfs_t '/exports/nfs(/.*)?'
restorecon -Rv /exports/nfs


Has anybody else seen similar issues?

Raz?
Y.


Best regards.

Markus
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Re: [ovirt-users] Storage, extend or new lun ?

[Fred Rolland]

Hi,

The support for refreshing the LUN size in an existing storage domain has
been introduced in 3.6, so it is not relevant for you.

You can add an additional LUN to an existing storage domain.

Regards,

Fred

[1]
https://www.ovirt.org/develop/release-management/features/storage/lun-resize/

On Mon, Jun 26, 2017 at 9:35 AM, Enrico Becchetti Gmail <
enrico.becche...@gmail.com> wrote:

> Dear All,
> I've oVirt 3.5.3-1-1.el6 with two kind of storage , NFS and Fibre
> Channel.  Each Hypervisor
> has HBA controller and Data CLutser has four Storage named: DATA_FC,
> DATA_NFS, EXPORT
> and ISO-DOMAIN.
>
> Anybody know how can I extend a DATA_FC ? Which is the best practies ?
> Extend LUN from HP MSA controller or adding a new lun ?
> if I extend lun inside HP MSA oVirt see the new size ?
> Enrico
> Thanks a lot.
> Best Regards
>
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Re: [ovirt-users] migrating VMS from old hosted engine to new hosted engine

[Paul Groeneweg | Pazion]

Hi Yaniv,

I found out reason it didn't work was probably bug.

For reference probably https://bugzilla.redhat.com/show_bug.cgi?id=1446878
I updated oVirt to release candidate 3 4.1.3 and this fixed the issue.

I am now investigating to have an extra 3.6 Dc in my new Hostedengine with
a Cluster setup as 3.6, so I can switch storage domain and do a roll back
to old Hosted engine in case of any problems.

Thanks for you comments!



Op ma 26 jun. 2017 om 11:18 schreef Yaniv Kaul :

> On Fri, Jun 23, 2017 at 1:13 AM, Paul Groeneweg | Pazion 
> wrote:
>
>> We are moving our VMs from an old 3.6 oVirt platform to a new oVirt 4.1
>> platform.
>>
>> I am looking for an easy way to migrate the VMs. ( I know about export
>> domain, but this takes 2 times a copy action ) I tested and just detaching
>> the Data domain and attaching it, didn't work.
>>
>>
> It should work, and is the easiest way by far. Can you share more details
> on what did not work for you?
> Y.
>
>
>> Then I found the VM import option:
>>  - Adding a ssh key gen and setting password on virsh
>> - load a list of machines in the webinterface from VM import
>> - when I start an import the system complains:
>> The following VMs retrieved from external server
>> qemu+ssh://r...@xxx.xxx.xxx.xxx/system are not in down status: VM
>> [VM-NAME].
>> - I tried to suspend the VM, but this didn;t work either ( same error )
>> - Problem is ,when VM is shutdown, it disappears from this system list.
>>
>> Is there a way to directly import a VM from old oVirt platform to the new
>> platform
>>
>> Looking forward to find a solution to quickly migrate our VMs.
>>
>> Best Regards,
>>
>> Paul Groeneweg
>>
>>
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Re: [ovirt-users] import and old datadomain

[Elad Ben Aharon]

Hi,

Can you please describe the full flow?
On which oVirt release the old domains were created?



Elad


On Mon, Jun 26, 2017 at 7:11 AM, Ben De Luca  wrote:

> Hey,
>  So, our DR plans included the idea of importing old domains. Is that
> meant to work now?
>
> -ben
> *very tired sysadmin*
>
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Re: [ovirt-users] import and old datadomain

[Ben De Luca]

Sure, it's going to take me a day to catch up with every thing

On Mon, 26 Jun 2017 at 12:17 pm, Elad Ben Aharon 
wrote:

> Hi,
>
> Can you please describe the full flow?
> On which oVirt release the old domains were created?
>
>
>
> Elad
>
>
> On Mon, Jun 26, 2017 at 7:11 AM, Ben De Luca  wrote:
>
>> Hey,
>>  So, our DR plans included the idea of importing old domains. Is that
>> meant to work now?
>>
>> -ben
>> *very tired sysadmin*
>>
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Re: [ovirt-users] Ovirt adding routes

[Alan Griffiths]

Thanks for the clarification, I see now why it's not working. In the GUI
there is no gateway configured for ovirtmgmt network on my single host.
However I can't add one as the network is "in use" by the HostedEngine.
Other than adding a second host is there anyway to work around this?

On 18 June 2017 at 08:11, Edward Haas  wrote:

> Hi Alan,
>
> The oVirt host agent (VDSM) has a multi-gateway/sourceroute feature which
> allows gateways to be specified per network, in addition to the host level
> routes.
> By default and depending on which version you use, only the ovirtmgmt
> (management) network defines the host default route but all networks
> (including ovirtmgmt) have a gateway definition which is set on a per
> network base.
>
> The way network based routes are defined is using different routing tables
> and rules.
> For more information, please see the feature page:
> http://www.ovirt.org/develop/release-management/features/
> network/multiple-gateways
>
> It should not block or interfere with your traffic, unless you are doing
> something unexpected, like having the default that collides the the one
> defined using ovirtmgmt network.
>
> Thanks,
> Edy.
>
>
> On Tue, Jun 13, 2017 at 6:28 PM, Alan Griffiths 
> wrote:
>
>> Hi,
>>
>> When installing an ovirt host I got these routes automatically added
>>
>> default dev ovirtmgmt  table 2886865805  scope link
>> 172.18.19.128/26 via 172.18.19.141 dev ovirtmgmt  table 2886865805
>>
>> What is their intended purpose? It seems to be stopping packets from
>> being correctly routed to the local gateway.
>>
>> Thanks,
>>
>> Alan
>>
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