[ovirt-users] Hosted Engine config in our hardware environment

[Simone Tiraboschi]

----- Original Message -----
> From: "Eric Wong" <Eric.Wong at solvians.com>
> To: users at ovirt.org
> Sent: Thursday, March 19, 2015 7:04:04 PM
> Subject: [ovirt-users] Hosted Engine config in our hardware environment
> 
> Hello oVirt guru out there:
> 
> I want to seek some advice on upgrade path for our oVirt management vm
> configuration. We have been using oVirt for over 3 years. When we first
> setup oVirt environment, Hosted Engine componment did not exist. Our
> question is should we migrate our current configuration to use Hosted
> Engine?
> 
> First let me give an overview of our configuration. We have blade servers in
> 2 separate racks. D1 & X1. Each side has 10 blades. Storage is iSCSI SAN.
> 
> Inside our oVirt 3.5.0.1-1.el6 installation, it is configured with 2 data
> centers. D1 & X1. Each datacenter has the 10 blades for that side. The
> management function of oVirt (oVirt web console) is running off 2 VMs,
> ovirt-mgmt-1 on D1, and ovirt-mgmt-2 on X1. We have keepalived to maintain a
> flowing IP for the oVirt management console. The keepalived script makes
> sure only one copy of ovirt-engine is running at any time. It can be on D1
> or X1. The mgmt VMs have Postgresql setup in replication mode. In case one
> of the mgmt vm failed, the other mgmt vm on the other rack can pick up the
> mgmt role. Both mgmt VMs can see all blades and SAN resources on D1 & X1.
> 
> This configuration has been working well for us. The drawback is if both
> ovirt mgmt vm crashed, we will not be able to start them or make any change
> to the ovirt environment. It is because the mgmt VMs are running within the
> oVirt domain.
> 
> We tried to upgrade our configuration to Hosted Engine configuration. From
> what I understand, the Hosted Engine will run in a separate storage domain.
> In both times we tried to upgrade to Hosted Engine, they both failed during
> export and import of current configuration.

Here you can find some hint about how to migrate to hosted-engine:
http://www.ovirt.org/Migrate_to_Hosted_Engine

> I think my questions are:
> - will the Hosted Engine model works in our hardware configuration. With
> hardware in 2 racks, D1 & X1. Can a single Hosted Engine manage hardware on
> both sides?
> - How can we achieve redundancy when running Hosted Engine? We need to have
> management capibility in case one side completely failed.
> 
> Thanks in advance.
> Eric
> 
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