3:43 a.m.
Hi,
I'm reading this guide to provide Active-Active DR for my environment (2 sites):
https://ovirt.org/documentation/disaster-recovery-guide/active_active_ove...
I have a sef-hosted environment with a storage domains per site with synchronous
replication. I can put all my VM with a storage lease on the other storage site but i
can't put the lease on the manager (the option is disable). How I configure the
storage HA of my manager?.
Regards,
4:16 a.m.
On Fri, May 31, 2019 at 10:46 AM <raul.caballero.girol(a)gmail.com> wrote:
Hi,
I'm reading this guide to provide Active-Active DR for my environment (2
sites):
https://ovirt.org/documentation/disaster-recovery-guide/active_active_ove...
I have a sef-hosted environment with a storage domains per site with
synchronous replication. I can put all my VM with a storage lease on the
other storage site but i can't put the lease on the manager (the option is
disable).
You cannot create a VM lease for the hosted-engine VM because the
hosted-engine VM is always already protected by a volume lease.
How I configure the storage HA of my manager?.
Did you read
https://ovirt.org/documentation/disaster-recovery-guide/active_active_ove...
?
Regards,
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4:33 a.m.
On Fri, May 31, 2019 at 10:46 AM
<raul.caballero.girol(a)gmail.com> wrote:
You cannot create a VM lease for the hosted-engine VM because the
hosted-engine VM is always already protected by a volume lease.
Sorry, I don't
understand this. If the storage when is placed my manager down, it will startup in other
storage?
Yes, and it's only say "Configure all virtual machines that need to
failover as highly available, and ensure that the virtual machine has a lease on the
target storage domain."
But the manager, It's configured for HA storage by default?. I have made a lab with 1
host and 2 storage domain replicated and, when I pull down the engine storage, It
don't start up again.
6:34 a.m.
On Fri, May 31, 2019 at 11:35 AM <raul.caballero.girol(a)gmail.com> wrote:
> On Fri, May 31, 2019 at 10:46 AM
<raul.caballero.girol(a)gmail.com>
wrote:
>
>
>
> You cannot create a VM lease for the hosted-engine VM because the
> hosted-engine VM is always already protected by a volume lease.
Sorry, I don't understand this. If the storage when is placed my manager
down, it will startup in other storage?
HA mechanism for the engine VM is provided by ovirt-ha-agent service
running on all the hosted-engine configured hosts (at least a couple on
each site).
The hosted-engine configured hosts communicate via a whiteboard wrote on
the hosted-engine storage domain so, if the storage devices on the two
sites are in sync (it requires latency < 7ms), all the hosted-engine host
can also see the status on the other site and eventually take over.
The volume lease is there to enforce, at storage level, that only one host
at a time is able to run the engine VM (regardless of the site where is it
since also the lock is in sync).
>
>
> Did you read
>
https://ovirt.org/documentation/disaster-recovery-guide/active_active_ove.
..
> ?
Yes, and it's only say "Configure all virtual machines that need to
failover as highly available, and ensure that the virtual machine has a
lease on the target storage domain."
But the manager, It's configured for HA storage by default?. I have made a
lab with 1 host and 2 storage domain replicated and, when I pull down the
engine storage, It don't start up again.
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6:52 a.m.
OK, but so, what is the meaning of "Configure all virtual machines that need to
failover as highly available, and ensure that the virtual machine has a lease on the
target storage domain." Is it assuming that the VMs are in otrher storage domain (no
sync)?
7:42 a.m.
On Fri, May 31, 2019 at 1:54 PM <raul.caballero.girol(a)gmail.com> wrote:
OK, but so, what is the meaning of "Configure all virtual
machines that
need to
failover as highly available, and ensure that the virtual machine has a
lease on the
target storage domain." Is it assuming that the VMs are in otrher storage
domain (no sync)?
You have to configure all the VMs as HA enabling a VM lease on that.
The engine will take care to restart them.
VM leases are also wrote to the relevant storage domain and so they are
going to be in sync if you are correctly syncing the storage on the two
sites.
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