[ovirt-users] How does the Stream based management engine transition to RHV?

[Thomas Hoberg]

In the recent days, I've been trying to validate the transition from CentOS 8 
to Alma, Rocky, Oracle and perhaps soon Liberty Linux for existing HCI clusters.

I am using nested virtualization on a VMware workstation host, because I 
understand snapshoting and linked clones much better on VMware, even if I've 
tested nested virtualization to some degree with oVirt as well. It makes moving 
forth and back between distros and restarting failed oVirt deployments much 
easier and more reliable than ovirt-hosted-engine-cleanup.

Installing oVirt 4.10 on TrueCentOS systems, which had been freshly switched to 
Alma, Rocky and Oracle went relatively well, apart from Oracle pushing UEK 
kernels, which break VDO (and some Python2 mishaps).

I'm still testing transitioning pre-existing TrueCentOS HCI glusters to Alma, 
Rocky and Oracle.

While that solves the issue of having the hosts running a mature OS which is 
downstream of RHEL, there is still an issue with the management engine being 
based on the upstream stream release: It doesn't have the vulnerability 
managment baked in, which is required even for labs use in an enterprise.

So I'd like to ask our Redhat friends here: How does this work when releases of 
oVirt transition to RHV? Do you backport oVirt changes from Stream to RHEL? 
When bugs are found in that process, are they then fed back into oVirt or into 
the oVirt-to-RHEV proces?
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[ovirt-users] Re: Can't upgrade ovirt 4.4.3 to 4.4.9

[Thomas Hoberg]

Unfortunately I have no answer to your problem.

But I'd like to know: where does that leave you?

Are youre severs still running with normal operational tasks performing, are 
you just not able to handle migrations, restarts or is your environment down 
until this gets fixed?

Or were you able to go back to 4.3 and await a fix?
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[ovirt-users] Re: gerrit.ovirt.org upgrade

[Denis Volkov]

Hello

Upgrade to the latest version of 2.16 branch is finished. Gerrit is up and
running.

2.16 is the last version that supports separate ReviewDb, so as a
preparation for future upgrades, migration from ReviewDb to NoteDb was done.

There are no more changes planned for today.

In case of issues please create ticket in issue tracking system:
https://issues.redhat.com/projects/CPDEVOPS/issues


-- 

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[ovirt-users] Re: [ovirt-devel] gerrit.ovirt.org upgrade

[Michal Skrivanek]

> On 21. 1. 2022, at 17:05, Denis Volkov  wrote:
> 
> Hello
> 
> I'm starting upgrade, gerrit will be unavailable

ETA? any complications?

> 
> -- 
> Denis Volkov
> 
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[ovirt-users] CentOS 8.4 Linux hosts from 4.4.8 to Rocky Linux 4.4.10

[Gianluca Cecchi]

Hello,
after updating the external engine from CentOS 8.4 and 4.4.8 to Rocky Linux
8.5 and 4.4.9 as outlined here:
https://lists.ovirt.org/archives/list/users@ovirt.org/message/YUDJRC22SQPAPAIURQIVSEMGITDRQOOM/
I went further and updated also the hosts.
Environment is with an external engine and 3 CentOS Linux 8.4 hosts in
4.4.8 with iSCSI storage domain.

Preliminarily I upgraded the engine to 4.4.10 (not yet the just released
async) without problems.
Then, one host at a time:

. put host into maintenance from web admin UI
Management --> Maintenance

. In a terminal f host set proxy for my environment needs
export https_proxy=http://my_proxy:my_proxy_port
export http_proxy=http://my_proxy:my_proxy_port (not sure if this
necessary...)

. in the same terminal execute migration script
./migrate2rocky.sh -r

. executed Management --> SSH Management --> SSH Restart from web admin ui
the host comes on in maintenance mode

. selected Installation --> Check for Upgrade but the host is detected as
already update

. for further security and to be sure that all upgrade steps are applied I
executed
Installation --> Reinstall
I deselected
- activate host after install
- reboot host after install
It went ok so

. executed Management --> SSH Management --> SSH Restart from web admin ui
the host comes on in maintenance mode

. Management --> Activate

. Empty another host moving its VMs to the just updated host and continue
in the same way, also electing as new SPM the updated host

All went smoothly and without VMs disruption.
Let's see how it goes next days with the light workload I have on this
testing environment.
Currently the async 1 of 4.4.10 is not catched up by engine-upgrade-check
command.. I'm going to retry applying again during the next few days.

Gianluca
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[ovirt-users] Re: gerrit.ovirt.org upgrade

[Denis Volkov]

Hello

I'm starting upgrade, gerrit will be unavailable

-- 

Denis Volkov
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[ovirt-users] oVirt 4.4.10 Async update #1

[Sandro Bonazzola]

On January 21st 2022 the oVirt project released an async update to the
following packages:

ovirt-engine 4.4.10.5

Fixing the following bugs:
 - [BZ 1854038 ] - Download or upload
disk (SDK) fails due to 'Timed out waiting for transfer XXX to finalize'
 - [BZ 2013430 ] - oVirt 4.4. FIPS
install leaves UUID blank in grub after setting kernel option
 - [BZ 2037216 ] - VM
imported from configuration is stuck in WaitForLaunch once removed quickly
after power-off

-- 

Sandro Bonazzola

MANAGER, SOFTWARE ENGINEERING, EMEA R RHV

Red Hat EMEA 

sbona...@redhat.com


*Red Hat respects your work life balance. Therefore there is no need to
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[ovirt-users] Re: oVirt 4.4.10 is now generally available

[Sandro Bonazzola]

Il giorno ven 21 gen 2022 alle ore 13:37 Strahil Nikolov <
hunter86...@yahoo.com> ha scritto:

> I've updated yesterday (both Engine and the Host -> CentOS Stream) and
> today I got a complete hangup of the system and had to reboot.
> I don't know if it's related or not, but just keep it in mind.
>

Can you please provide a sos report / log collector report so we can
investigate this?



>
> Best Regards,
> Strahil Nikolov
>
> On Thu, Jan 20, 2022 at 14:41, Sandro Bonazzola
>  wrote:
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[ovirt-users] Re: oVirt 4.4.10 is now generally available

[Strahil Nikolov via Users]

I've updated yesterday (both Engine and the Host -> CentOS Stream) and today I 
got a complete hangup of the system and had to reboot.I don't know if it's 
related or not, but just keep it in mind.
Best Regards,Strahil Nikolov
 
 
  On Thu, Jan 20, 2022 at 14:41, Sandro Bonazzola wrote:   
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[ovirt-users] gerrit.ovirt.org upgrade

[Denis Volkov]

Hello

Gerrit.ovirt.org will be upgraded later today. Approximate start time is
4PM UTC.
During the upgrade service will be shut down and so will not be available.


-- 

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[ovirt-users] Can't upgrade ovirt 4.4.3 to 4.4.9

[jihwahn1018]

Hello,

I tried to upgrade ovirt to 4.4.9 from 4.4.3

when i do 'engine-setup' i get error
--
[ ERROR ] Failed to execute stage 'Misc configuration': Command 
'/usr/share/ovirt-engine-dwh/dbscripts/schema.sh' failed to execute
[ INFO  ] DNF Performing DNF transaction rollback
[ ERROR ] DNF module 'dnf.history' has no attribute 'open_history'
--
from the log i found that column "count_threads_as_cores" does not exist

---
 193375 2022-01-18 16:36:26,309+0900 DEBUG 
otopi.plugins.ovirt_engine_setup.ovirt_engine_dwh.db.schema plugin.execute  
  :926 execute-output: ['/usr/share/ovirt-engine-dwh/dbscripts/schema.sh', 
'-s', 'localhost', '-p', '5432', '-u', 'ovirt_engine_history', '-d', 
'ovirt_engine_history', '-l', '/var/log/ovirt-engine/setup/ovirt-engine-setu
p-20220118162426-z0o4xg.log', '-c', 'apply'] stderr:
 193376 psql:/usr/share/ovirt-engine-dwh/dbscripts/create_views_4_4.sql:148: 
ERROR:  column "count_threads_as_cores" does not exist
 193377 LINE 10:   count_threads_as_cores as count_threads_as_cores,
 193378^
 193379 FATAL: Cannot execute sql command: 
--file=/usr/share/ovirt-engine-dwh/dbscripts/create_views_4_4.sql
 193380
 193381 2022-01-18 16:36:26,309+0900 DEBUG otopi.context 
context._executeMethod:145 method exception
 193382 Traceback (most recent call last):
 193383   File "/usr/lib/python3.6/site-packages/otopi/context.py", line 132, 
in _executeMethod
 193384 method['method']()
 193385   File 
"/usr/share/ovirt-engine/setup/bin/../plugins/ovirt-engine-setup/ovirt-engine-dwh/db/schema.py",
 line 367, in _misc
 193386 odwhcons.DBEnv.PGPASS_FILE
 193387   File "/usr/lib/python3.6/site-packages/otopi/plugin.py", line 931, in 
execute
 193388 command=args[0],
 193389 RuntimeError: Command '/usr/share/ovirt-engine-dwh/dbscripts/schema.sh' 
failed to execute
 193390 2022-01-18 16:36:26,330+0900 ERROR otopi.context 
context._executeMethod:154 Failed to execute stage 'Misc con
figuration': Command '/usr/share/ovirt-engine-dwh/dbscripts/schema.sh' failed 
to execute
 193391 2022-01-18 16:36:26,330+0900 DEBUG otopi.transaction 
transaction.abort:119 aborting 'DNF Transaction'
 193392 2022-01-18 16:36:26,331+0900 DEBUG 
otopi.plugins.otopi.packagers.dnfpackager dnfpackager.verbose:75 DNF Closi  
  ng transaction with rollback
 193393 2022-01-18 16:36:26,731+0900 INFO 
otopi.plugins.otopi.packagers.dnfpackager dnfpackager.info:79 DNF Performin 
   g DNF transaction rollback
 193394 2022-01-18 16:36:27,570+0900 ERROR 
otopi.plugins.otopi.packagers.dnfpackager dnfpackager.error:84 DNF module   
  'dnf.history' has no attribute 'open_history'
 193395 2022-01-18 16:36:27,571+0900 DEBUG otopi.transaction 
transaction.abort:125 Unexpected exception from abort() of 'DNF 
Transaction'
--

when i search for this problem, i found that column "count_threads_as_cores" is 
added from ovirt-engine 4.4.6.7.  and ovirt-dwh 4.4.7.
do i need to update 4.4.3 to 4.4.6( or 4.4.7) then 4.4.6(or 4.4.7) to 4.4.9?



Thanks,
Jihwan
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[ovirt-users] Re: mdadm vs. JBOD

[Gilboa Davara]

On Fri, Jan 21, 2022 at 10:45 AM Gilboa Davara  wrote:

> On Thu, Jan 20, 2022 at 8:52 AM  wrote:
>
>> Hi all,
>>
>> Feel free to give your personal opinion whether software RAID makes any
>> sense at all with oVirt Node or what your architecture would be given the
>> mentioned hardware (3 servers, 6 800GB NVME disks, 18 7.68TB NVME disks).
>>
>> Thanks a lot for any feedback,
>> Jonas
>>
>
> Hello,
>
> I somehow missed your original email.
> While I don't have a comparable setup (We usually opt for mixed SSD HDD
> setups with fast VMs running on SSD bached gluster volumes and
> large-storage VMs using HDD backed gluster volume), I can offer some
> insight.
> 1. Performance wise, using software RAID10 on the NVME drives will give
> you great performance, while reducing the chance of a double drop.
> 2. Avoid using RAID5/50/6/60 as the write amplification will eat up your
> read-intensive NVMEs life span in a couple of months.
> 3, Use a fast network back-end. A good high-end server with hardware RAID
> HDD can easily saturate a 10GbR Linux @peak load.
> 4. Use arbiter volumes, split the load between the nodes to reduce the
> write amplifications. (N1: brick, brick, arbiter. N2: brick, arbiter,
> brick. N3: arbiter, brick, brick).
> 5. In general I usually avoid using the wizard, manually creating the
> gluster volumes before I begin the deployment.
>
> - Gilboa
>

I missed the fact that your 3'rd host has considerably smaller storage.
In this case, luckily I have a comparable setup @Home. I simply placed all
the arbiter volumes on the 3'rd host.

- Gilboa
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[ovirt-users] Re: mdadm vs. JBOD

[Gilboa Davara]

On Thu, Jan 20, 2022 at 8:52 AM  wrote:

> Hi all,
>
> Feel free to give your personal opinion whether software RAID makes any
> sense at all with oVirt Node or what your architecture would be given the
> mentioned hardware (3 servers, 6 800GB NVME disks, 18 7.68TB NVME disks).
>
> Thanks a lot for any feedback,
> Jonas
>

Hello,

I somehow missed your original email.
While I don't have a comparable setup (We usually opt for mixed SSD HDD
setups with fast VMs running on SSD bached gluster volumes and
large-storage VMs using HDD backed gluster volume), I can offer some
insight.
1. Performance wise, using software RAID10 on the NVME drives will give you
great performance, while reducing the chance of a double drop.
2. Avoid using RAID5/50/6/60 as the write amplification will eat up your
read-intensive NVMEs life span in a couple of months.
3, Use a fast network back-end. A good high-end server with hardware RAID
HDD can easily saturate a 10GbR Linux @peak load.
4. Use arbiter volumes, split the load between the nodes to reduce the
write amplifications. (N1: brick, brick, arbiter. N2: brick, arbiter,
brick. N3: arbiter, brick, brick).
5. In general I usually avoid using the wizard, manually creating the
gluster volumes before I begin the deployment.

- Gilboa




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