<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Mon, Mar 19, 2018 at 5:19 AM, Joseph Kelly <span dir="ltr"><<a href="mailto:Joseph.Kelly@tradingscreen.com" target="_blank">Joseph.Kelly@tradingscreen.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">
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<p style="margin-top:0px;margin-bottom:0px">Sorry to ask again, But I can see from the link below the that nodes and engines should work between minor number </p>
<p style="margin-top:0px;margin-bottom:0px">upgrades.</p></div></div></blockquote><div><br></div><div>Indeed.<br></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"><div dir="ltr"><div id="gmail-m_3749884296985990567divtagdefaultwrapper" style="font-size:10pt;color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif" dir="ltr"><p style="margin-top:0px;margin-bottom:0px"> But is ovirt 4.2.x backward compatible with, say, 3.6 nodes. Does anyone know ? Is this documented anywhere ? </p></div></div></blockquote><div><br></div><div>You can search the release notes pages of 4.2.z releases for '3.6' to find relevant bugs.<br><br></div><div>Just _using_ such hosts, should work.<br><br></div><div>Adding a 3.6 host to a 4.2 engine will likely break.<br><br></div><div>It's definitely not intended to be used for long times - you are encouraged to upgrade your hosts too, soon after the engine.<br><br></div><div>If you plan a very long transition period, I suggest to create a list of operations you might want/need to do, and test everything in a test environment.</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"><div dir="ltr"><div id="gmail-m_3749884296985990567divtagdefaultwrapper" style="font-size:10pt;color:rgb(0,0,0);font-family:Verdana,Geneva,sans-serif" dir="ltr">
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<p style="margin-top:0px;margin-bottom:0px"><span>[ovirt-users] compatibility relationship between datacenter, ovirt and cluster</span><br>
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<a href="https://www.mail-archive.com/users@ovirt.org/msg17092.html" class="gmail-m_3749884296985990567OWAAutoLink" target="_blank">https://www.mail-archive.com/<wbr>users@ovirt.org/msg17092.html</a>
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Thanks,
<div>Joe.<br>
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<div id="gmail-m_3749884296985990567divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Joseph Kelly<br>
<b>Sent:</b> Wednesday, March 14, 2018 5:32 PM<br>
<b>To:</b> <a href="mailto:users@ovirt.org" target="_blank">users@ovirt.org</a><br>
<b>Subject:</b> Query about running ovirt-4.2.1 engine support 3.x nodes ? </font>
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<p style="margin-top:0px;margin-bottom:0px">Hello All,</p>
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<p style="margin-top:0px;margin-bottom:0px">I have two hopefully easy questions regarding an <span>ovirt-4.2.1 engine support and 3.x nodes ? </span></p>
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<p style="margin-top:0px;margin-bottom:0px">1) Does an <span>ovirt-4.2.x engine support 3.x nodes ? As This page states:</span></p>
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<p style="margin-top:0px;margin-bottom:0px"><span>"The cluster compatibility is set according to the version of the least capable host operating system in the cluster."</span><br>
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<p style="margin-top:0px;margin-bottom:0px"><a href="https://www.ovirt.org/documentation/upgrade-guide/chap-Post-Upgrade_Tasks/" class="gmail-m_3749884296985990567x_OWAAutoLink" target="_blank">https://www.ovirt.org/<wbr>documentation/upgrade-guide/<wbr>chap-Post-Upgrade_Tasks/</a><br>
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<p style="margin-top:0px;margin-bottom:0px"><span style="font-size:10pt">Which seems to indicate that you can run say a 4.2.1 engine with lower version nodes, but is that correct ?</span></p>
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<p style="margin-top:0px;margin-bottom:0px"><span style="font-size:10pt">2) And can you just upgrade the nodes directly from 3.x to 4.2.x as per these steps ?</span></p>
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<div>1. Move the node to maintenance<br>
2. Add 4.2.x repos<br>
3. yum update<br>
4. reboot<br>
5. Activate (exit maintenance)</div></div></div></div></div></div></div></div></div></blockquote><div><br></div><div>This should work. You can also use the admin web ui for updates, which might be better, didn't check recently. See also e.g.:<br><br><a href="https://bugzilla.redhat.com/show_bug.cgi?id=1344020">https://bugzilla.redhat.com/show_bug.cgi?id=1344020</a><br><br></div><div>Best regards,<br></div></div>-- <br><div class="gmail_signature">Didi<br></div>
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