<div dir="ltr"><span style="font-size:12.8px">Hi Rik.</span><div style="font-size:12.8px">The flow should work, as long as the OS is supported by oVirt.</div><div style="font-size:12.8px">However, you will still need to move it to a new cluster.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Apr 22, 2016 at 3:44 PM, Rik Theys <span dir="ltr"><<a href="mailto:Rik.Theys@esat.kuleuven.be" target="_blank">Rik.Theys@esat.kuleuven.be</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi,<br>
<br>
I'm looking for the best procedure to upgrade a host from CentOS 6 to<br>
CentOS 7. The host is the only host in the oVirt data center (the engine<br>
is running on another machine and manages multiple data centers).<br>
<br>
For datacenters with multiple hosts I followed the following steps:<br>
- Add new cluster<br>
- Put host in maintenance<br>
- Remove host from old cluster<br>
- Reinstall host<br>
- Add host to new cluster<br>
- repeat for all hosts until old cluster is empty<br>
<br>
This worked OK and the data center was never "non operational".<br>
<br>
Is the procedure identical for a data center with only one host?<br>
<br>
Should I also remove the host from the (only) cluster in the data<br>
center, or should I reinstall it and select the "reinstall" option in<br>
the oVirt web interface? Since there is only one host in the cluster<br>
there's no need to create a new cluster?<br>
<br>
Is there any state on the host that I should keep when performing the<br>
reinstall with CentOS 7?<br>
<br>
The host is using FC storage (local disks configured as FC through<br>
multipath).<br>
<br>
Regards,<br>
<br>
Rik<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
Rik Theys<br>
System Engineer<br>
KU Leuven - Dept. Elektrotechniek (ESAT)<br>
Kasteelpark Arenberg 10 bus 2440 - B-3001 Leuven-Heverlee<br>
<a href="tel:%2B32%280%2916%2F32.11.07" value="+3216321107" target="_blank">+32(0)16/32.11.07</a><br>
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