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<div class="">Shouldnt one update the engine first ?<br class="">
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<blockquote type="cite" class="">
<div class="">On 23 Aug 2016, at 14:28, Barak Korren <<a href="mailto:bkorren@redhat.com" class="">bkorren@redhat.com</a>> wrote:</div>
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<p dir="ltr" class="">The following process worked for me:<br class="">
1. ensure all hosts are running el7 or above, and all clusters had been upgraded to 3.6 level
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2. upgrade vdsm to 4.x on all hosts (assuming you are not using ovirt-node) by switching to maintainance upgrading and activating one by one to avoid VM downtime.<br class="">
3. Upgrade engine by following one of the documented procedures (we just inatalled a new machine for it and switched DNS after backup/restore).<br class="">
4. Once satisfied that illing back to 3.6 engine will not be needed - upgrade cluster level.</p>
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<div class="gmail_quote">בתאריך 23 באוג׳ 2016 12:43, "Arnaud Lauriou" <<a href="mailto:arnaud.lauriou@irisa.fr" class="">arnaud.lauriou@irisa.fr</a>> כתב:<br type="attribution" class="">
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Hi,<br class="">
<br class="">
What is the best way to upgrade a datacenter from ovirt 3.6 to 4.0 ?<br class="">
Upgrade engine, hosts then cluster ?<br class="">
If right, how do you upgrade a host running ovirt 3.6.7 ? Simple upgrade or fresh install ?<br class="">
During the update process of a cluster, some hosts will be in 3.6.7 and others in 4.0.2, is it a problem for migrating VMs ?<br class="">
<br class="">
Found docs about engine upgrade but not a lot about host and cluster.<br class="">
<br class="">
Thanks,<br class="">
<br class="">
Arnaud<br class="">
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