8:40 a.m.
Hi all ,
I am planning to setup an ovirt cluster with two hosts + 1 ovirt engine .
But this setup have a draw back of single point of failure chance for
ovirt engine. So what happens if ovirt engine goes down ? All VMs will be
down ? Or it wont affect the ovirt nodes and VMs ? Please advice /
--
*Hans Emmanuel*
*NOthing to FEAR but something to FEEL......*
8:47 a.m.
----- Original Message -----
From: "Hans Emmanuel" <hansemmanuel(a)gmail.com>
To: users(a)ovirt.org
Sent: Friday, January 10, 2014 7:40:23 AM
Subject: [Users] Ovirt Engine single point of failure
Hi all ,
I am planning to setup an ovirt cluster with two hosts + 1 ovirt engine .
But this setup have a draw back of single point of failure chance for
ovirt engine. So what happens if ovirt engine goes down ? All VMs will be
down ? Or it wont affect the ovirt nodes and VMs ? Please advice /
Hi,
If ovirt engine crashes, your VMs will not go down.
--
*Hans Emmanuel*
*NOthing to FEAR but something to FEEL......*
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
8:58 a.m.
Thanks for the reply .
So I can just start the ovirt engine again resume the operations through
ovirt engine , right ?
On Fri, Jan 10, 2014 at 11:17 AM, Yair Zaslavsky <yzaslavs(a)redhat.com>wrote:
----- Original Message -----
> From: "Hans Emmanuel" <hansemmanuel(a)gmail.com>
> To: users(a)ovirt.org
> Sent: Friday, January 10, 2014 7:40:23 AM
> Subject: [Users] Ovirt Engine single point of failure
>
> Hi all ,
>
> I am planning to setup an ovirt cluster with two hosts + 1 ovirt engine .
> But this setup have a draw back of single point of failure chance for
> ovirt engine. So what happens if ovirt engine goes down ? All VMs will be
> down ? Or it wont affect the ovirt nodes and VMs ? Please advice /
Hi,
If ovirt engine crashes, your VMs will not go down.
>
> --
> *Hans Emmanuel*
>
> *NOthing to FEAR but something to FEEL......*
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
--
*Hans Emmanuel*
*NOthing to FEAR but something to FEEL......*
9:12 a.m.
Yes
----- Original Message -----
From: "Hans Emmanuel" <hansemmanuel(a)gmail.com>
To: "Yair Zaslavsky" <yzaslavs(a)redhat.com>
Cc: users(a)ovirt.org
Sent: Friday, January 10, 2014 7:58:23 AM
Subject: Re: [Users] Ovirt Engine single point of failure
Thanks for the reply .
So I can just start the ovirt engine again resume the operations through
ovirt engine , right ?
On Fri, Jan 10, 2014 at 11:17 AM, Yair Zaslavsky <yzaslavs(a)redhat.com>wrote:
>
>
> ----- Original Message -----
> > From: "Hans Emmanuel" <hansemmanuel(a)gmail.com>
> > To: users(a)ovirt.org
> > Sent: Friday, January 10, 2014 7:40:23 AM
> > Subject: [Users] Ovirt Engine single point of failure
> >
> > Hi all ,
> >
> > I am planning to setup an ovirt cluster with two hosts + 1 ovirt engine .
> > But this setup have a draw back of single point of failure chance for
> > ovirt engine. So what happens if ovirt engine goes down ? All VMs will be
> > down ? Or it wont affect the ovirt nodes and VMs ? Please advice /
>
> Hi,
> If ovirt engine crashes, your VMs will not go down.
>
> >
> > --
> > *Hans Emmanuel*
> >
> > *NOthing to FEAR but something to FEEL......*
> >
> > _______________________________________________
> > Users mailing list
> > Users(a)ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
>
--
*Hans Emmanuel*
*NOthing to FEAR but something to FEEL......*
10:01 a.m.
OK, so just so I understand this, in the described scenario of three
servers: one management server/engine and two nodes, let's say the
management server suffers catastrophic hard disk failure where no data
can be recovered from it, nor were any backups made.
Is it possible to perform a new installation of ovirt-engine, add the
two existing nodes, and everything "just works"? Or would you at least
need to do some reconfiguring (e.g., re-add the logical networks etc.)
Basically, even though the nodes were part of the now-dead ovirt-engine,
there would be no problem in getting them added in to the
newly-installed ovirt-engine?
-Alan
10:17 a.m.
Alan,
IMHO this is not the scenario described in the original question - or maybe I did not
understand well the original question?
I assume the original question is about a scenario where engine restarts, and not about a
catastrophic failure as you describe here.
----- Original Message -----
From: "Alan Murrell" <lists(a)murrell.ca>
To: users(a)ovirt.org
Sent: Friday, January 10, 2014 9:01:14 AM
Subject: Re: [Users] Ovirt Engine single point of failure
OK, so just so I understand this, in the described scenario of three
servers: one management server/engine and two nodes, let's say the
management server suffers catastrophic hard disk failure where no data
can be recovered from it, nor were any backups made.
Is it possible to perform a new installation of ovirt-engine, add the
two existing nodes, and everything "just works"? Or would you at least
need to do some reconfiguring (e.g., re-add the logical networks etc.)
Basically, even though the nodes were part of the now-dead ovirt-engine,
there would be no problem in getting them added in to the
newly-installed ovirt-engine?
-Alan
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
9:15 a.m.
Consider trying the new hosted engine feature
(http://www.ovirt.org/Features/Self_Hosted_Engine).
It runs the ovirt engine as a VM inside the engine, and also provides HA solution for it.
Oved
----- Original Message -----
From: "Yair Zaslavsky" <yzaslavs(a)redhat.com>
To: "Alan Murrell" <lists(a)murrell.ca>
Cc: users(a)ovirt.org
Sent: Friday, January 10, 2014 9:17:53 AM
Subject: Re: [Users] Ovirt Engine single point of failure
Alan,
IMHO this is not the scenario described in the original question - or maybe I
did not understand well the original question?
I assume the original question is about a scenario where engine restarts, and
not about a catastrophic failure as you describe here.
----- Original Message -----
> From: "Alan Murrell" <lists(a)murrell.ca>
> To: users(a)ovirt.org
> Sent: Friday, January 10, 2014 9:01:14 AM
> Subject: Re: [Users] Ovirt Engine single point of failure
>
> OK, so just so I understand this, in the described scenario of three
> servers: one management server/engine and two nodes, let's say the
> management server suffers catastrophic hard disk failure where no data
> can be recovered from it, nor were any backups made.
>
> Is it possible to perform a new installation of ovirt-engine, add the
> two existing nodes, and everything "just works"? Or would you at least
> need to do some reconfiguring (e.g., re-add the logical networks etc.)
>
> Basically, even though the nodes were part of the now-dead ovirt-engine,
> there would be no problem in getting them added in to the
> newly-installed ovirt-engine?
>
> -Alan
>
>
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
11:46 a.m.
Hi,
do you really advise to use a feature which is not 100% implemented and
is just available in an alpha release for a production setup?
Or is my assumption incorrect and this feature is already 100%
supported? This would be great news.
Am 12.01.2014 07:15, schrieb Oved Ourfalli:
Consider trying the new hosted engine feature
(http://www.ovirt.org/Features/Self_Hosted_Engine).
It runs the ovirt engine as a VM inside the engine, and also provides HA solution for
it.
Oved
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
12:17 p.m.
For now only for testing purposes, and considering it to be used in the near future once
it is more tested/stable.
It will be released only on oVirt 3.4 alpha, and I guess it should be complete and tested
in 3.4.
cc-ing Doron, which is pushing this feature. He should know best about its current
status.
Thank you,
Oved
----- Original Message -----
From: "Sven Kieske" <S.Kieske(a)mittwald.de>
To: users(a)ovirt.org
Sent: Monday, January 13, 2014 10:46:56 AM
Subject: Re: [Users] Ovirt Engine single point of failure
Hi,
do you really advise to use a feature which is not 100% implemented and
is just available in an alpha release for a production setup?
Or is my assumption incorrect and this feature is already 100%
supported? This would be great news.
Am 12.01.2014 07:15, schrieb Oved Ourfalli:
> Consider trying the new hosted engine feature
> (http://www.ovirt.org/Features/Self_Hosted_Engine).
> It runs the ovirt engine as a VM inside the engine, and also provides HA
> solution for it.
>
> Oved
--
Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator
Mittwald CM Service GmbH & Co. KG
Königsberger Straße 6
32339 Espelkamp
T: +49-5772-293-100
F: +49-5772-293-333
https://www.mittwald.de
Geschäftsführer: Robert Meyer
St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
2:53 p.m.
We'd appreciate any feedback you can give us on hosted engine.
Regardless, it's undergoing various tests and should be release or 3.4
with the known limitations (NFS only, no ovirt node support, el6.5+).
----- Original Message -----
From: "Oved Ourfalli" <ovedo(a)redhat.com>
To: "Sven Kieske" <S.Kieske(a)mittwald.de>, "Alan Murrell"
<lists(a)murrell.ca>
Cc: users(a)ovirt.org, "Doron Fediuck" <dfediuck(a)redhat.com>
Sent: Monday, January 13, 2014 11:17:50 AM
Subject: Re: [Users] Ovirt Engine single point of failure
For now only for testing purposes, and considering it to be used in the near
future once it is more tested/stable.
It will be released only on oVirt 3.4 alpha, and I guess it should be
complete and tested in 3.4.
cc-ing Doron, which is pushing this feature. He should know best about its
current status.
Thank you,
Oved
----- Original Message -----
> From: "Sven Kieske" <S.Kieske(a)mittwald.de>
> To: users(a)ovirt.org
> Sent: Monday, January 13, 2014 10:46:56 AM
> Subject: Re: [Users] Ovirt Engine single point of failure
>
> Hi,
>
> do you really advise to use a feature which is not 100% implemented and
> is just available in an alpha release for a production setup?
>
> Or is my assumption incorrect and this feature is already 100%
> supported? This would be great news.
>
> Am 12.01.2014 07:15, schrieb Oved Ourfalli:
> > Consider trying the new hosted engine feature
> > (http://www.ovirt.org/Features/Self_Hosted_Engine).
> > It runs the ovirt engine as a VM inside the engine, and also provides HA
> > solution for it.
> >
> > Oved
>
> --
> Mit freundlichen Grüßen / Regards
>
> Sven Kieske
>
> Systemadministrator
> Mittwald CM Service GmbH & Co. KG
> Königsberger Straße 6
> 32339 Espelkamp
> T: +49-5772-293-100
> F: +49-5772-293-333
> https://www.mittwald.de
> Geschäftsführer: Robert Meyer
> St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen
> Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
> _______________________________________________
> Users mailing list
> Users(a)ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users
>
2:07 p.m.
On 01/10/2014 09:01 AM, Alan Murrell wrote:
OK, so just so I understand this, in the described scenario of three
servers: one management server/engine and two nodes, let's say the
management server suffers catastrophic hard disk failure where no data
can be recovered from it, nor were any backups made.
Is it possible to perform a new installation of ovirt-engine, add the
two existing nodes, and everything "just works"? Or would you at least
need to do some reconfiguring (e.g., re-add the logical networks etc.)
Basically, even though the nodes were part of the now-dead ovirt-engine,
there would be no problem in getting them added in to the
newly-installed ovirt-engine?
-Alan
_______________________________________________
Users mailing list
Users(a)ovirt.org
http://lists.ovirt.org/mailman/listinfo/users
for now, you should backup the engine on a regular basis. once we close
the gap of 'import existing data domain' will be easier to recover even
without an engine backup (you'd still need to add the hosts of course).
3967
days inactive
3970
days old
10 comments
7 participants
participants (7)
-
Alan Murrell -
Doron Fediuck -
Hans Emmanuel -
Itamar Heim -
Oved Ourfalli -
Sven Kieske -
Yair Zaslavsky