[ovirt-users] Re: Hosted Engine cluster version compatib.

[Diggy Mc]

Thanks everyone for all the support.  After fixing the TZ for the HE, I was 
able to upgrade cluster compatibility.

Having said that, I still had to go through the properties of over 100 VMs to 
verify/correct the TZ because of that nasty bug.

And of course I had to deal with the VirtIO re-enumeration problem affecting 
all my Windows VMs because of the compatibility level upgrade.  Fortunately 
there are very few Windows VMs.  Mostly a Linux shop here.  :)

Thanks again.  Have a great weekend.
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[ovirt-users] Re: COarse-grained LOck-stepping for oVirt

[Harry O]

Thanks for reply.
What is the alternative for this in oVirt?
Achieving Non-stop Service for legacy statefull application that doesn't 
support it by itself.
The virtualization layer is the perfect place to implement this functionality.
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[ovirt-users] Re: COarse-grained LOck-stepping for oVirt

[Michal Skrivanek]

> On 24. 9. 2021, at 11:09, Harry O  wrote:
> 
> Hi,
> Will COLO be implemented in oVirt?

Hi,
very unlikely. It's been in development for the past ~10 years and while it 
kept progressing I'm not sure it's yet in usable state. It would require some 
big changes in oVirt as well

Thanks,
michal

> Is it possible to do it myself? I see qemu-kvm and lots of other qemu 
> installed on my oVirt nodes.
> It's in Qemu upstream (v4.0)
> https://wiki.qemu.org/Features/COLO
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[ovirt-users] Re: Hosted Engine cluster version compatib.

[Michal Skrivanek]

> On 24. 9. 2021, at 11:28, Gianluca Cecchi  wrote:
> 
> On Fri, Sep 24, 2021 at 11:05 AM Michal Skrivanek 
> mailto:michal.skriva...@redhat.com>> wrote:
> 
> 
>> On 24. 9. 2021, at 9:43, Gianluca Cecchi > > wrote:
>> 
>> BTW: there are two things that are not so clear to me:
>> 1. Is this only impacting SHE environments or is it a general problem also 
>> with external standalone engine ones?
> 
> it’s affecting all VMs, in standalone envs engine is not a VM
> 
> Of course... I meant if I have standalone external engine that manages VM1 
> and VM2 and I update from 4.4.7 to 4.4.8-5, will VM1 and VM2 impacted?
> I presume yes from your answer

yes

> 
> 
>> 2. Is it correct to say that if I already upgraded in the past to 4.4.7 and 
>> at that time I updated my cluster level from 4.5 to 4.6 (both in case of SHE 
>> and external engine), then I shouldn't have this kind of problems if then I 
>> updated to the impacted 4.4.8-5 version? And then I can go and continue 
>> updating to 4.4.8-6 without any risk/problems?
> 
> the cluster level update problem is just a side effect of the time zone 
> missing. You will see problems in other flows, or next time you upgrade to 
> 4.7 if we ever have one.
> 
> 
> So I don't understand if I need to rollback or if I can anyway update to 
> 4.4.8-6 and eventually modify from database.
> By the way in my env all my VMs in 4.4.7 had timezone set to the default 
> value "Etc/GMT". Does this imply no impact at all?

you should set it to something. 
It sets it to default on its own whenever that VMs get "touched" in some way, 
and since Etc/GMT is the default you won't really notice much, but there might 
be places where it may cause issues (dunno, OVF export maybe)

> Eg on another environment I see that after updating from 4.4.7 to 4.4.8-5 and 
> then 4.4.8-6, in Web Admin GUI if I select a VM, in general subtab I have for 
> 2 of them
> 
> Hardware Clock Time Offset: Etc/GMT
> 
> for all the other ones there isn't the "Hardware Clock Time Offset" item...
> Fot these VMs under edit virtual machine -> system -> Hardware Clock Time 
> Offset I see they have the value
> default:(GMTZ) Greenwich Standard Time
> 
> and from database point of view:
> 
> engine=# select time_zone,count(*) from vm_static group by time_zone;
>  time_zone | count 
> ---+---
>|18
>  Etc/GMT   | 2
> (2 rows)
> 
> engine=#
> 
> engine=# select vm_name from vm_static where time_zone='Etc/GMT';
>   vm_name  
> ---
>  testcl1
>  c76client
> (2 rows)

yeah, so those are vms which you have probably edited and saved in the meantime.

> 
> engine=# 
> 
> So I should use the db statement too, correct?

Hard to say, to minimize changes HE might be enough as long as you do not see 
any other issues anywhere else and you would use the default anyway.

> Any need to restart engine service after or before that?

Not really needed.

Thanks,
michal
> 
> Thanks
> Gianluca

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[ovirt-users] Re: Managed Block Storage and Templates

[Shantur Rathore]

I tried with external Ceph with cinderlib and Synology iSCSI with cinderlib
both as Managed block storage

On Fri, 24 Sep 2021, 09:51 Gianluca Cecchi, 
wrote:

> On Wed, Sep 22, 2021 at 2:30 PM Shantur Rathore 
> wrote:
>
>> Hi all,
>>
>> Anyone tried using Templates with Managed Block Storage?
>> I created a VM on MBS and then took a snapshot.
>> This worked but as soon as I created a Template from snapshot, the
>> template got created but there is no disk attached to the template.
>>
>> Anyone seeing something similar?
>>
>> Thanks
>>
>>
> Are you using an external ceph cluster? Or what other cinder volume driver
> have you configured for the MBS storage domain?
>
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[ovirt-users] Re: Ooops! in last step of Hyperconverged deployment

[Harry O]

I had conflicting IP's
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[ovirt-users] Re: Hosted Engine cluster version compatib.

[Gianluca Cecchi]

On Fri, Sep 24, 2021 at 11:05 AM Michal Skrivanek <
michal.skriva...@redhat.com> wrote:

>
>
> On 24. 9. 2021, at 9:43, Gianluca Cecchi 
> wrote:
>
> BTW: there are two things that are not so clear to me:
> 1. Is this only impacting SHE environments or is it a general problem also
> with external standalone engine ones?
>
>
> it’s affecting all VMs, in standalone envs engine is not a VM
>

Of course... I meant if I have standalone external engine that manages VM1
and VM2 and I update from 4.4.7 to 4.4.8-5, will VM1 and VM2 impacted?
I presume yes from your answer


> 2. Is it correct to say that if I already upgraded in the past to 4.4.7
> and at that time I updated my cluster level from 4.5 to 4.6 (both in case
> of SHE and external engine), then I shouldn't have this kind of problems if
> then I updated to the impacted 4.4.8-5 version? And then I can go and
> continue updating to 4.4.8-6 without any risk/problems?
>
>
> the cluster level update problem is just a side effect of the time zone
> missing. You will see problems in other flows, or next time you upgrade to
> 4.7 if we ever have one.
>
>
So I don't understand if I need to rollback or if I can anyway update to
4.4.8-6 and eventually modify from database.
By the way in my env all my VMs in 4.4.7 had timezone set to the default
value "Etc/GMT". Does this imply no impact at all?

Eg on another environment I see that after updating from 4.4.7 to 4.4.8-5
and then 4.4.8-6, in Web Admin GUI if I select a VM, in general subtab I
have for 2 of them

Hardware Clock Time Offset: Etc/GMT

for all the other ones there isn't the "Hardware Clock Time Offset" item...
Fot these VMs under edit virtual machine -> system -> Hardware Clock Time
Offset I see they have the value
default:(GMTZ) Greenwich Standard Time

and from database point of view:

engine=# select time_zone,count(*) from vm_static group by time_zone;
 time_zone | count
---+---
   |18
 Etc/GMT   | 2
(2 rows)

engine=#

engine=# select vm_name from vm_static where time_zone='Etc/GMT';
  vm_name
---
 testcl1
 c76client
(2 rows)

engine=#

So I should use the db statement too, correct?
Any need to restart engine service after or before that?

Thanks
Gianluca
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[ovirt-users] COarse-grained LOck-stepping for oVirt

[Harry O]

Hi,
Will COLO be implemented in oVirt?
Is it possible to do it myself? I see qemu-kvm and lots of other qemu installed 
on my oVirt nodes.
It's in Qemu upstream (v4.0)
https://wiki.qemu.org/Features/COLO
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[ovirt-users] Re: Hosted Engine cluster version compatib.

[Michal Skrivanek]

> On 24. 9. 2021, at 9:43, Gianluca Cecchi  wrote:
> 
> BTW: there are two things that are not so clear to me:
> 1. Is this only impacting SHE environments or is it a general problem also 
> with external standalone engine ones?

it’s affecting all VMs, in standalone envs engine is not a VM

> 2. Is it correct to say that if I already upgraded in the past to 4.4.7 and 
> at that time I updated my cluster level from 4.5 to 4.6 (both in case of SHE 
> and external engine), then I shouldn't have this kind of problems if then I 
> updated to the impacted 4.4.8-5 version? And then I can go and continue 
> updating to 4.4.8-6 without any risk/problems?

the cluster level update problem is just a side effect of the time zone 
missing. You will see problems in other flows, or next time you upgrade to 4.7 
if we ever have one.

> 
> Thanks,
> Gianluca
> 
> On Thu, Sep 23, 2021 at 9:45 PM Diggy Mc  > wrote:
> The only VM that my cluster compatibility upgrade complains about is 
> "HostedEngine".  I'm not about to test my SQL knowledge by writing my own SQL 
> command and I see no reason to touch VMs that don't upset the cluster 
> upgrade.  Can you please provide a SQL command that corrects ONLY the 
> HostedEngine VM ???  Much appreciated.  NOTE: All my servers' OS (physical 
> and VM) are set to "Etc/UCT" wherever possible.

update vm_static SET time_zone='Etc/GMT' where vm_name='HostedEngine';

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>  
> 
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[ovirt-users] Re: Managed Block Storage and Templates

[Gianluca Cecchi]

On Wed, Sep 22, 2021 at 2:30 PM Shantur Rathore 
wrote:

> Hi all,
>
> Anyone tried using Templates with Managed Block Storage?
> I created a VM on MBS and then took a snapshot.
> This worked but as soon as I created a Template from snapshot, the
> template got created but there is no disk attached to the template.
>
> Anyone seeing something similar?
>
> Thanks
>
>
Are you using an external ceph cluster? Or what other cinder volume driver
have you configured for the MBS storage domain?
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[ovirt-users] Re: Managed Block Storage and Templates

[Benny Zlotnik]

Can you submit a bug for this?

On Wed, Sep 22, 2021 at 3:31 PM Shantur Rathore
 wrote:
>
> Hi all,
>
> Anyone tried using Templates with Managed Block Storage?
> I created a VM on MBS and then took a snapshot.
> This worked but as soon as I created a Template from snapshot, the
> template got created but there is no disk attached to the template.
>
> Anyone seeing something similar?
>
> Thanks
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[ovirt-users] Re: Hosted Engine cluster version compatib.

[Gianluca Cecchi]

BTW: there are two things that are not so clear to me:
1. Is this only impacting SHE environments or is it a general problem also
with external standalone engine ones?
2. Is it correct to say that if I already upgraded in the past to 4.4.7 and
at that time I updated my cluster level from 4.5 to 4.6 (both in case of
SHE and external engine), then I shouldn't have this kind of problems if
then I updated to the impacted 4.4.8-5 version? And then I can go and
continue updating to 4.4.8-6 without any risk/problems?

Thanks,
Gianluca

On Thu, Sep 23, 2021 at 9:45 PM Diggy Mc  wrote:

> The only VM that my cluster compatibility upgrade complains about is
> "HostedEngine".  I'm not about to test my SQL knowledge by writing my own
> SQL command and I see no reason to touch VMs that don't upset the cluster
> upgrade.  Can you please provide a SQL command that corrects ONLY the
> HostedEngine VM ???  Much appreciated.  NOTE: All my servers' OS (physical
> and VM) are set to "Etc/UCT" wherever possible.
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>
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[ovirt-users] how to automatically join AD for windows guest

[wharton wang]

Hi there,
anyone could help to tell how to configure sysprep or something on oVirt 
engine, so it makes vm automatically join active directory . TIA.
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