[ovirt-users] Ovirt 4.2. Isolated (host-only) network

2018-04-08 Thread Anton Shilov 


Hi List!
Recently I've started using ovirt 4.2 and faced that I cannot find any guide 
how to do it in ovirt.org documentation.
Need help with configure isolated/host-only (not connect to real NIC) network 
that allowed to communicate two or more VMs into private network. May be exist 
a solution? I did it such: linked logical networt to real NIC without connect 
anywhere (link - DOWN), but this solution is a little bit odd. How to exclude 
read NIC?
 
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Re: [ovirt-users] How it is oVirt used in your Department?

2018-04-08 Thread ~Stack~ 
On 03/28/2018 05:31 AM, Fedele Stabile Nuovo Server wrote:
> My question is mainly addressed at those of you who use oVirt not only
> for creating services on virtual machines.
> What is your experience and what did you made?

Still consider myself an oVirt newb. Only been using it for a few months
but I'm liking it so far. I don't have the hardware specs in front of me
but I have a 4 node Hypervisor setup with a physical Engine host. All
running on Scientific Linux 7.

> Is there anyone who virtualized an HPC cluster?

I'm still not convinced that virtualized HPC is a good idea for those
who need compute performance. Though it is getting better than when I
first heard someone say they were doing it at Supercomputing14!

> What is for you the advantage on virtualizing a cluster?

Um. As a 14year HPC admin, I still say none for compute. However, I am
using oVirt to support a ton of my infrastructure services: Frontends,
Log-ins, Scheduler, Database, LDAP, ect.

I'm still learning how to set up something where my users can click a
button on a webpage and get a VM spun up for a Graphical session on
oVirt. I'm also still debating on the pros/cons for setting up oVirt
VM's for things like JupyterNotebooks/RStudio Server/ect for the "I just
want a web page to develop my code on and will submit to the cluster for
the job run" crowd.

It is a huge learning process for me. Most of the tools I've been using
have worked great for years, but it is time to update and refresh those
skills. Most of the provisioning tools I've used in the past don't work
so well with oVirt. So now I'm exploring other tools.

Foreman is and overcomplicated buggy headache, IMO. Every time I or a
coworker has tried to get it going it has been a massive
time-suck-crash-and-burn. Add to it that my current security team has
HUGE issues with Puppet (don't get me started - I like Puppet) and
building Foreman by hand with Salt is just an awful awful awful
experience I wouldn't wish on an enemy...just no. :-)
DigitalRebar was looking SUPER promising, but they recently went to a
model that MUST chat out to the Internet or it breaks itself (a complete
no-go for me). A complete shame.
So I'm back to Cobbler which is simple and works fantastically well, but
doesn't really have any integrations into oVirt (that I'm aware of). I'm
probably going to have to write something with the two API's.


> Or, having a class with PC or Raspberry is better to use LTSP or PiNet
> or virtualize desktops?
Can't say. Don't mess with Raspberry Pi's much.

~Stack~



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[ovirt-users] 回复：Re: 回复：Re: ovirt engine HA

2018-04-08 Thread dhy336 
sorry. I do not know how to describe my qeustion I want to add a hosted-engine, 
I use same nfs path with first hosted-engine, but has some error.  --== 
STORAGE CONFIGURATION ==--   Please specify the storage you 
would like to use (glusterfs, iscsi, fc, nfs3, nfs4)[nfs3]:   Please 
specify the full shared storage connection path to use (example: host:/path): 
192.168.122.218:/exports/hosted-engine-test1[ ERROR ] The selected device 
already contains a storage domain.[ ERROR ] Setup of additional hosts using 
this software is not allowed anymore. Please use the engine web interface to 
deploy any additional hosts.[ ERROR ] Failed to execute stage 'Environment 
customization': Setup of additional hosts using this software is not allowed 
anymore. Please use the engine web interface to deploy any additional hosts.[ 
INFO  ] Stage: Clean up[ INFO  ] Generating answer file 
'/var/lib/ovirt-hosted-engine-setup/answers/answers-20180408214554.conf'[ INFO  
] Stage: Pre-termination[ INFO  ] Stage: Termination[ ERROR ] Hosted Engine 
deployment failed  Log file is located at 
/var/log/ovirt-hosted-engine-setup/ovirt-hosted-engine-setup-20180408214515-4vofq6.log


- 原始邮件 -
发件人：Alex K 
收件人：dhy...@sina.com
抄送人：FERNANDO FREDIANI , users 
主题：Re: [ovirt-users] 回复：Re: ovirt engine HA
日期：2018年04月08日 19点45分

Are you a troll?

On Sun, Apr 8, 2018, 12:15   wrote:

Hi, I hava two node, and deploy hosted-engine by #hosted-engine --deploy, I 
find two hosted-engine that  i deploied is independent,  how to make my 
hosted-engine is HA?
- 原始邮件 -
发件人：Alex K 
收件人：FERNANDO FREDIANI 
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月04日 01点40分

In case you need HA for the engine you need to deploy it to other hosts also 
through the GUI.


On Tue, Apr 3, 2018 at 4:47 PM, FERNANDO FREDIANI  
wrote:
Is it enough to deploy the Self-Hosted engine in just one Host of the cluster 
or is it necessary to repeat the process in each of the nodes that must be able 
to run it ?

Thanks
Fernando

2018-04-03 2:01 GMT-03:00 Vincent Royer :
Same thing, the engine in this case is "self-hosted", as in, it runs in a VM 
hosted on the cluster that it is managing.  I am a beginner here, but from my 
understanding, each node is always checking on the health of the engine VM.  If 
the engine is missing (ie, the host running it has gone down), then another 
available, healthy host will spawn up the engine and you will regain access. 
In my experience this has worked very reliably.  I have 2 hosts, both are 
"able" to run the engine VM.  If I take one host down, I am not able to load 
the engine GUI.  But if I wait a few minutes, then I regain access, and see 
that the engine is now running on the remaining healthy host. Vincent 
Royer778-825-1057

SUSTAINABLE MOBILE ENERGY SOLUTIONS




On Mon, Apr 2, 2018 at 6:07 PM,   wrote:
what different between self-hosted engine and  hosted engine? I find a project 
ovirt-hosted-engine-ha  https://github.com/oVirt/ovirt-hosted-engine-ha  - 
原始邮件 -
发件人：Vincent Royer 
收件人：dhy...@sina.com
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月03日 08点57分

If your node running self-hosted engine crashes, the hosted engine will be 
started up on another node. It just takes a few minutes for this all to happen, 
but it works reliably in my experience. 



On Mon, Apr 2, 2018 at 5:42 PM,   wrote:
How to solute ovirt engine HA, I have a three node cluster, one of is deploy 
engine and node , others are node, if node that deplay engine and  node crash, 
How to ensure my server is up?
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Re: [ovirt-users] 回复：Re: ovirt engine HA

2018-04-08 Thread Alex K 
Are you a troll?


On Sun, Apr 8, 2018, 12:15  wrote:

>
> Hi, I hava two node, and deploy hosted-engine by #hosted-engine --deploy,
>  I find two hosted-engine that  i deploied is independent,  how to make my
> hosted-engine is HA?
>
> - 原始邮件 -
> 发件人：Alex K 
> 收件人：FERNANDO FREDIANI 
> 抄送人：users 
> 主题：Re: [ovirt-users] ovirt engine HA
> 日期：2018年04月04日 01点40分
>
> In case you need HA for the engine you need to deploy it to other hosts
> also through the GUI.
>
>
> On Tue, Apr 3, 2018 at 4:47 PM, FERNANDO FREDIANI <
> fernando.fredi...@upx.com> wrote:
>
> Is it enough to deploy the Self-Hosted engine in just one Host of the
> cluster or is it necessary to repeat the process in each of the nodes that
> must be able to run it ?
>
> Thanks
> Fernando
>
> 2018-04-03 2:01 GMT-03:00 Vincent Royer :
>
> Same thing, the engine in this case is "self-hosted", as in, it runs in a
> VM hosted on the cluster that it is managing.  I am a beginner here, but
> from my understanding, each node is always checking on the health of the
> engine VM.  If the engine is missing (ie, the host running it has gone
> down), then another available, healthy host will spawn up the engine and
> you will regain access.
>
> In my experience this has worked very reliably.  I have 2 hosts, both are
> "able" to run the engine VM.  If I take one host down, I am not able to
> load the engine GUI.  But if I wait a few minutes, then I regain access,
> and see that the engine is now running on the remaining healthy host.
>
> *Vincent Royer*
> *778-825-1057 <(778)%20825-1057>*
>
>
> 
> *SUSTAINABLE MOBILE ENERGY SOLUTIONS*
>
>
>
>
> On Mon, Apr 2, 2018 at 6:07 PM,  wrote:
>
> what different between self-hosted engine and  hosted engine? I find a
> project ovirt-hosted-engine-ha
> 
> https://github.com/oVirt/ovirt-hosted-engine-ha
> - 原始邮件 -
> 发件人：Vincent Royer 
> 收件人：dhy...@sina.com
> 抄送人：users 
> 主题：Re: [ovirt-users] ovirt engine HA
> 日期：2018年04月03日 08点57分
>
> If your node running self-hosted engine crashes, the hosted engine will be
> started up on another node. It just takes a few minutes for this all to
> happen, but it works reliably in my experience.
>
>
>
> On Mon, Apr 2, 2018 at 5:42 PM,  wrote:
>
> How to solute ovirt engine HA, I have a three node cluster, one of is
> deploy engine and node , others are node, if node that deplay engine and
>  node crash, How to ensure my server is up?
> ___
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>
>
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[ovirt-users] 回复： 回复：Re: ovirt engine HA

2018-04-08 Thread dhy336 

Hi, I hava two node, and deploy hosted-engine by #hosted-engine --deploy, I 
find two hosted-engine that  i deploied is independent,  how to make my 
hosted-engine is HA?
- 原始邮件 -
发件人：Alex K 
收件人：FERNANDO FREDIANI 
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月04日 01点40分

In case you need HA for the engine you need to deploy it to other hosts also 
through the GUI.


On Tue, Apr 3, 2018 at 4:47 PM, FERNANDO FREDIANI  
wrote:
Is it enough to deploy the Self-Hosted engine in just one Host of the cluster 
or is it necessary to repeat the process in each of the nodes that must be able 
to run it ?

Thanks
Fernando

2018-04-03 2:01 GMT-03:00 Vincent Royer :
Same thing, the engine in this case is "self-hosted", as in, it runs in a VM 
hosted on the cluster that it is managing.  I am a beginner here, but from my 
understanding, each node is always checking on the health of the engine VM.  If 
the engine is missing (ie, the host running it has gone down), then another 
available, healthy host will spawn up the engine and you will regain access. 
In my experience this has worked very reliably.  I have 2 hosts, both are 
"able" to run the engine VM.  If I take one host down, I am not able to load 
the engine GUI.  But if I wait a few minutes, then I regain access, and see 
that the engine is now running on the remaining healthy host. Vincent 
Royer778-825-1057

SUSTAINABLE MOBILE ENERGY SOLUTIONS




On Mon, Apr 2, 2018 at 6:07 PM,   wrote:
what different between self-hosted engine and  hosted engine? I find a project 
ovirt-hosted-engine-ha  https://github.com/oVirt/ovirt-hosted-engine-ha  - 
原始邮件 -
发件人：Vincent Royer 
收件人：dhy...@sina.com
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月03日 08点57分

If your node running self-hosted engine crashes, the hosted engine will be 
started up on another node. It just takes a few minutes for this all to happen, 
but it works reliably in my experience. 



On Mon, Apr 2, 2018 at 5:42 PM,   wrote:
How to solute ovirt engine HA, I have a three node cluster, one of is deploy 
engine and node , others are node, if node that deplay engine and  node crash, 
How to ensure my server is up?
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Re: [ovirt-users] Is compatibility level change required for upgrading from 4.0 to 4.2?

2018-04-08 Thread Luca 'remix_tj' Lorenzetto 
Il dom 8 apr 2018, 08:44 Arik Hadas  ha scritto:

>
>
> On Fri, Apr 6, 2018 at 12:28 PM, Luca 'remix_tj' Lorenzetto <
> lorenzetto.l...@gmail.com> wrote:
>
>> On Fri, Apr 6, 2018 at 11:05 AM, Michal Skrivanek
>>  wrote:
>> >
>> > you just need to keep the supported versions in mind. Version 4.2
>> supports
>> > Cluster levels 3.6, 4.0, 4.1(same as version 4.1) - so any of them is ok
>> >
>>
>> Perfect, thank you for the confirmation.
>>
>> To change the compatibility level of DC, i've seen that all clusters
>> require has to be upgraded.
>> Does the upgrade of the DC requires the restart of all the VMs to have
>> the cluster completely upgraded or restarting the VMs is an activity
>> indipendent from this?
>>
>
> You won't have to restart the running VMs.
> You'll see that VMs that were running at the time of the cluster upgrade
> are set with custom-compatibility-version that matches the previous
> compatibilty-level of the cluster. So obviously, VM-specific features that
> were added in 4.2 won't be applicable to those VMs until they are restarted
> (and then their custom-compatibility version is cleared so their effective
> compability-level would change to 4.2).
> But even when some VMs are set with custom-compatibility-version, the
> cluster is upgraded and so it should be possible to upgrade the DC.
>

Fantastic. Thanks for the explanation. I like to have a better knowledge of
what happens behind the scenes, because helps me to solve problems when
they appear.

Luca


>
>>
>> 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 , <
>> lorenzetto.l...@gmail.com>
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[ovirt-users] 回复：Re: ovirt engine HA

2018-04-08 Thread dhy336 
Hi, I hava two node, and deploy hosted-engine by #hosted-engine --deploy, I do 
not understand what should I do?
- 原始邮件 -
发件人：Alex K 
收件人：FERNANDO FREDIANI 
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月04日 01点40分

In case you need HA for the engine you need to deploy it to other hosts also 
through the GUI.


On Tue, Apr 3, 2018 at 4:47 PM, FERNANDO FREDIANI  
wrote:
Is it enough to deploy the Self-Hosted engine in just one Host of the cluster 
or is it necessary to repeat the process in each of the nodes that must be able 
to run it ?

Thanks
Fernando

2018-04-03 2:01 GMT-03:00 Vincent Royer :
Same thing, the engine in this case is "self-hosted", as in, it runs in a VM 
hosted on the cluster that it is managing.  I am a beginner here, but from my 
understanding, each node is always checking on the health of the engine VM.  If 
the engine is missing (ie, the host running it has gone down), then another 
available, healthy host will spawn up the engine and you will regain access. 
In my experience this has worked very reliably.  I have 2 hosts, both are 
"able" to run the engine VM.  If I take one host down, I am not able to load 
the engine GUI.  But if I wait a few minutes, then I regain access, and see 
that the engine is now running on the remaining healthy host. Vincent 
Royer778-825-1057

SUSTAINABLE MOBILE ENERGY SOLUTIONS




On Mon, Apr 2, 2018 at 6:07 PM,   wrote:
what different between self-hosted engine and  hosted engine? I find a project 
ovirt-hosted-engine-ha  https://github.com/oVirt/ovirt-hosted-engine-ha  - 
原始邮件 -
发件人：Vincent Royer 
收件人：dhy...@sina.com
抄送人：users 
主题：Re: [ovirt-users] ovirt engine HA
日期：2018年04月03日 08点57分

If your node running self-hosted engine crashes, the hosted engine will be 
started up on another node. It just takes a few minutes for this all to happen, 
but it works reliably in my experience. 



On Mon, Apr 2, 2018 at 5:42 PM,   wrote:
How to solute ovirt engine HA, I have a three node cluster, one of is deploy 
engine and node , others are node, if node that deplay engine and  node crash, 
How to ensure my server is up?
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