<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Feb 5, 2018 5:00 PM, "Luca 'remix_tj' Lorenzetto" <<a href="mailto:lorenzetto.luca@gmail.com">lorenzetto.luca@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="elided-text">Hello,<br>
<br>
i'm starting the implementation of our disaster recovery site with RHV<br>
4.1.latest for our production environment.<br>
<br>
Our production setup is very easy, with self hosted engine on dc<br>
KVMPDCA, and virtual machines both in KVMPDCA and KVMPD dcs. All our<br>
setup has an FC storage backend, which is EMC VPLEX/VMAX in KVMPDCA<br>
and EMC VNX8000. Both storage arrays supports replication via their<br>
own replication protocols (SRDF, MirrorView), so we'd like to delegate<br>
to them the replication of data to the remote site, which is located<br>
on another remote datacenter.<br>
<br>
In KVMPD DC we have some storage domains that contains non critical<br>
VMs, which we don't want to replicate to remote site (in case of<br>
failure they have a low priority and will be restored from a backup).<br>
In our setup we won't replicate them, so will be not available for<br>
attachment on remote site. Can be this be an issue? Do we require to<br>
replicate everything?<br>
What about master domain? Do i require that the master storage domain<br>
stays on a replicated volume or can be any of the available ones?<br>
<br>
I've seen that since 4.1 there's an API for updating OVF_STORE disks.<br>
Do we require to invoke it with a frequency that is the compatible<br>
with the replication frequency on storage side. We set at the moment<br>
RPO to 1hr (even if planned RPO requires 2hrs). Does OVF_STORE gets<br>
updated with the required frequency?<br>
<br>
I've seen a recent presentation by Maor Lipchuk that is showing the<br>
"automagic" ansible role for disaster recovery:<br>
<br>
</div><a href="https://www.slideshare.net/maorlipchuk/ovirt-dr-site-tosite-using-ansible" rel="noreferrer" target="_blank">https://www.slideshare.net/<wbr>maorlipchuk/ovirt-dr-site-<wbr>tosite-using-ansible</a><br>
<br>
It's also related with some youtube presentations demonstrating a real<br>
DR plan execution.<br>
<br>
But what i've seen is that Maor is explicitly talking about 4.2<br>
release. Does that role works only with >4.2 releases or can be used<br>
also on earlier (4.1) versions?<br></blockquote></div></div></div><div dir="auto"><br></div><div dir="auto">Releases before 4.2 do not store complete information on the OVF store to perform such comprehensive failover. I warmly suggest 4.2!</div><div dir="auto">Y.</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
I've tested a manual flow of replication + recovery through Import SD<br>
followed by Import VM and worked like a charm. Using a prebuilt<br>
ansible role will reduce my effort on creating a new automation for<br>
doing this.<br>
<br>
Anyone has experiences like mine?<br>
<br>
Thank you for the help you may provide, i'd like to contribute back to<br>
you with all my findings and with an usable tool (also integrated with<br>
storage arrays if possible).<br>
<br>
Luca<br>
<br>
(Sorry for duplicate email, ctrl-enter happened before mail completion)<br>
<div class="elided-text"><br>
<br>
--<br>
"E' assurdo impiegare gli uomini di intelligenza eccellente per fare<br>
calcoli che potrebbero essere affidati a chiunque se si usassero delle<br>
macchine"<br>
Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716)<br>
<br>
"Internet è la più grande biblioteca del mondo.<br>
Ma il problema è che i libri sono tutti sparsi sul pavimento"<br>
John Allen Paulos, Matematico (1945-vivente)<br>
<br>
Luca 'remix_tj' Lorenzetto, <a href="http://www.remixtj.net" rel="noreferrer" target="_blank">http://www.remixtj.net</a> , <<a href="mailto:lorenzetto.luca@gmail.com">lorenzetto.luca@gmail.com</a>><br>
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