5:16 p.m.
Hi andrew,
This is my personal experience on recovery.
Yes you can recover the hosted-engine from a backup (almost every action you did on on
oVirt after backup will have to be manually reproduced)
This can be tricky depending on your conditions (and there are some subtleties which can
have significant impact later on)
- Do you have still SSH access to engine ?
- If so, do you trust engine VM OS, or should you reinstall it ?
If both questions are positive, then you just need to do a engine restore as explained
here :
http://www.ovirt.org/documentation/admin-guide/chap-Backups_and_Migration/
cordialement, regards,
Nelson LAMEIRAS
Ingénieur Systèmes et Réseaux / Systems and Networks engineer
Tel: +33 5 32 09 09 70
nelson.lameiras(a)lyra-network.com
www.lyra-network.com | www.payzen.eu
Lyra Network, 109 rue de l'innovation, 31670 Labège, FRANCE
----- Original Message -----
From: "Andrew Dent" <adent(a)ctcroydon.com.au>
To: "Yedidyah Bar David" <didi(a)redhat.com>, "users"
<users(a)ovirt.org>
Sent: Monday, July 3, 2017 3:40:38 PM
Subject: Re: [ovirt-users] Recovering hosted-engine
Hi Didi
Fair enough.
If I'm in this situation.....
I have 3 hosts with 6 production VMs.
The hosted-engine VM is completely toast and not recoverable.
However I have a backup of the hosted-engine database (do I need
anything else).
Is it possible to build a new VM, import the backup of the previous
hosted-engine database and reconnect the storage domains and VMs in
their running state without any VMs experiencing an outage?
The URL
http://www.ovirt.org/documentation/self-hosted/chap-Backing_up_and_Restor...
looks to be longer now.
I'll review, test and see if this will give me what I'm looking for.
The broken link still seems to be broken.
When I click the link, the browser ends up at this
http://www.ovirt.org/documentation/self-hosted/chap-Backing_up_and_Restor...
But I suspect it should be
http://www.ovirt.org/documentation/self-hosted/chap-Installing_Additional...
Kind regards
Andrew
------ Original Message ------
From: "Yedidyah Bar David" <didi(a)redhat.com>
To: "Andrew Dent" <adent(a)ctcroydon.com.au>
Cc: "users" <users(a)ovirt.org>
Sent: 3/07/2017 11:12:05 PM
Subject: Re: [ovirt-users] Recovering hosted-engine
On Mon, Jul 3, 2017 at 3:46 PM, Andrew Dent
<adent(a)ctcroydon.com.au>
wrote:
> Has anyone successfully completed a hosted-engine recovery on a
>multiple
> host setup with production VMs?
I'd like to clarify that "recovery" can span a large spectrum of
flows, from a trivial "I did some change to the engine database
that broke stuff and I want to restore a backup I took prior to
this change" to a full system restoration including purchasing
and deploying new (perhaps different) hosts/network/storage
hardware, including many other flows in between.
So when you plan for recovery, you should define very well what
flows you plan to handle, and how you handle each.
The linked procedure correctly says it's "providing an example".
>
> Kind regards
>
>
> Andrew
>
>
>
> ------ Original Message ------
> From: "Andrew Dent" <adent(a)ctcroydon.com.au>
> To: "users" <users(a)ovirt.org>
> Sent: 2/07/2017 2:22:16 PM
> Subject: [ovirt-users] Recovering hosted-engine
>
> Hi
>
> A couple of questions about hosted-engine recovery.
> Part way through this URL, in the section "Workflow for Restoring the
> Self-Hosted Engine Environment"
>
>http://www.ovirt.org/documentation/self-hosted/chap-Backing_up_and_Restoring_an_EL-Based_Self-Hosted_Environment/
> it looks like once the hosted-engine is recovered on Host 1, the VMs
>on Host
> 2 and 3 will be running, but not accessible to the recovered Hosted
>Engine.
> Is that correct?
I am pretty certain that the procedure assumed that all hosts need
restoration,
not that some are still up-and-running.
> If so, how to you remove host 2 and host 3 from the environment, then
>add
> back in again while keeping the VMs running?
That's a good question.
Please try to describe the exact flow you have in mind. What's broken
and
needs restoration, and how do you plan to do that?
>
> Host 2 and Host 3 are not recoverable in their current state. These
>hosts
> need to be removed from the environment, and then added again to the
> environment using the hosted-engine deployment script. For more
>information
> on these actions, see the Removing Non-Operational Hosts from a
>Restored
> Self-Hosted Engine Environment section below and Chapter 7:
>Installing
> Additional Hosts to a Self-Hosted Environment.
>
> BTW: The link referring to chapter 7 is broken.
You are right. The link in the bottom of the page seems working.
Now pushed [1] to fix. Thanks for the report!
[1]
Best,
--
Didi
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