<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 29, 2017 at 6:06 PM, Luca 'remix_tj' Lorenzetto <span dir="ltr"><<a href="mailto:lorenzetto.luca@gmail.com" target="_blank">lorenzetto.luca@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
i'm experimenting a DR architecture that involves block storage<br>
replication from the storage side (EMC VNX 8000).<br>
<br>
Our idea is to import the replicated data storage domain on another<br>
datacenter, managed by another engine, with the option "Import Domain"<br>
and then import all the vms contained.<br>
<br>
The idea works, but we encountered an issue that we don't want to have<br>
again: we imported an SD and *no* vm were listed in the tab "VM<br>
Import". Disks were available, but no VM informations.<br>
<br>
What we did:<br>
- on storage side: split the replica between the main disk in Site A<br>
and the secondary disk Site B<br>
- on storage side: added the disk to the storage group of the<br>
"recovery" cluster<br>
- from engine UI: Imported storage domain, confirming that i want to<br>
activate even if seems to be attached to another DC<br>
- from engine UI: move out from maintenance the storage domain and<br>
click on the "VM Import" tab of the new SD.<br>
<br>
What happened: *no* vm were listed<br>
<br>
To identify better what's happening, I've found here some indications<br>
on how lvm for block storage works and I identified the command on how<br>
to find and read the OVF_STORE.<br>
Looking inside the OVF_STORE has shown why no vm were listed: it was<br>
empty (no .ovf file listed with tar tvf)<br>
<br>
So, without the possibility import vms, i did a rollback, detaching<br>
the storage domain and re-establishing the replication between the<br>
main site and the DR site.<br>
<br>
Then, after a day of replications (secondary volume is aligned every<br>
30 minutes), i tried again and i've been able to import also vms<br>
(OVF_STORE was populated).<br>
<br>
So my question is: how to i force to have OVF_STORE to be aligned at<br>
least as frequent as the replication? I want to have the VM disks<br>
replicated to the remote site along with VM OVF informations.<br></blockquote><div><br></div><div>1. There are events when the OVF store is updated.</div><div>2. You can force via the API:</div><div><span style="color:rgb(0,0,0);white-space:pre-wrap">POST api/storagedomains/{sd_id}/updateovfstore</span></div><div>3. You can right-click on a storage domain and select 'Update OVFs'</div><div>4. You can reduce the frequency in which it is updated (1h by default). I do not recommend reducing it too much. <span style="color:rgb(0,0,0);white-space:pre-wrap">OvfUpdateIntervalInMinutes I believe is the engine-config key for it.</span></div><div><span style="color:rgb(0,0,0);white-space:pre-wrap">Y.</span></div><div><span style="color:rgb(0,0,0);white-space:pre-wrap"><br></span></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Is possible to have OVF_STORE informations aligned when a VM is<br>
created/edited or with a scheduled task? Is this so I/O expensive?<br>
<br>
Thank you,<br>
<br>
<br>
Luca<br>
<br>
<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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</blockquote></div><br></div></div>