[ovirt-users] 2 data centeres, production and backup

[Bartomeu F. Sastre]

just a question, I have to have shared data domain, so in my case each phisycal datacenter have a SAN, no I cannot share this with the other DC, also I have a slower device with SATA disks a NAS (iSCSI, NFS), does it means that I have to deploy the engine on this slower device ?

thank you very much.


----- Missatge original -----
De: "Nathanaël Blanchet" <blanchet at abes.fr>
A: "Bartomeu Sastre" <bsastre at ajinca.net>, "users" <users at ovirt.org>
Enviats: Divendres, 20 Abril de 2018 10:49:22
Assumpte: Re: [ovirt-users] 2 data centeres, production and backup

Le 19/04/2018 à 12:26, Bartomeu F. Sastre a écrit :
> Hi, I would like to manage 2 separated data centers, one in a site and another place connected with optic fiber.
exactly the same here
>
>
> so I guess that I have to use 2 engines, one in each data center.
you can also

  * use one engine for 2DCs
  * if you use a common shared data domain (commonly NFS or iscsi), you
    can run only one DC, so you will be able to start your vms
    everywhere over your both DCs in a disaster case.

>
> Would they be able to see each other and move machines from one to another ?

  * in the case of two engines, clearly not, you'll have to use export
    domain to move your vms.
  * in the case of 2 DCs that share common data domains, you'll be able
    to move shutdown vms editing the DC/cluster in the properties tabs.
  * in the common shared data domain, you'll be able to live migrate vms
    if their hosts belong to the same cluster. If not, Shutdown your vms
    and move them to the targetted cluster

>   So I want to schedule backups to send periodically machines form the production DC to the backup DC, and in case of an emergency be able to start the VM on the backup data center.
You can use vm backup script that can save your vm to

  * the (NFS) export domain. When restoring you'll have to import all
    your vms, it can be a very long process
  * an other data domain, and reattach it to your backup DC.

>
> thanks !
>

-- 
Nathanaël Blanchet

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