<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hi Gianluca,<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">so generally speaking when host is in Maintenance status, engine doesn't communicate with this host, so you can do pretty much anything about it.<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">About the upgrade flow (host 4.0 -> 4.1), here's proper way(s) how to achieve that:<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">1. Put host to Maintenance<br>2. Add 4.1 repositories to the host<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">3. Upgrade the host - you have 2 options here:<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> a. UI<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> - Go to Hosts tab in webadmin<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> - Select host and click on Reinstall inside Installation menu<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> b. Command line<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"> - Connect to the host using SSH and upgrade using yum<br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">4. Activate the host<br><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">The main difference between UI and command line options is, that with UI option only necessary packages like VDSM and it's dependencies are upgraded.<br><br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default">Now regarding restart:<br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default"> 1. If host is in Maintenance, restart using SSH and shutdown/reboot execution is no problem. But if host is Up, then executing shutdown/reboot using SSH will make host NonResponsive and fencing will be executed<br><br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default"> 2. If you select Restart using SSH from Maintenance menu, it just connect using SSH and execute shutdown same way as it's done manually<br><br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default"> 3. If you select Restart using Power Management from Maintenance menu, it will execute restart using PM device and further actions are hardware dependent. On some servers it will send shutdown signal to OS similarly as if you execute reboot and afterwards it turns off power of the server (so the result may be the same as using shutdown from command line). But on different hardware it can just turn off power of the server.<br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default"><br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default">So for planned restart using SSH restart either from UI or from command line is preferred way.<br><br></div><div style="font-family:arial,helvetica,sans-serif" class="gmail_default">Martin</div><br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 10, 2017 at 1:57 PM, Sandro Bonazzola <span dir="ltr"><<a href="mailto:sbonazzo@redhat.com" target="_blank">sbonazzo@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Adding some people</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Feb 9, 2017 at 2:08 PM, Gianluca Cecchi <span dir="ltr"><<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div class="m_3298193506265474951h5"><div class="gmail_extra"><div class="gmail_quote">On Wed, Feb 8, 2017 at 10:59 AM, Gianluca Cecchi <span dir="ltr"><<a href="mailto:gianluca.cecchi@gmail.com" target="_blank">gianluca.cecchi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello,<div>what is considered the best way to shutdown and restart an hypervisor, supposing plain CentOS 7 host?</div><div><br></div><div>For example to cover these scenarios:</div><div>1) update host from 4.0 to 4.1</div><div>2) planned maintenance to the cabinet where the server is located and take the opportunity to update also OS packages</div><div><br></div><div>My supposed workflow:</div><div><br></div><div>- put host into maintenance</div><div>- yum update on host</div><div>- shutdown os from inside host (because from power mgmt it is brutal power off / power on) </div><div>--> should I get any warning from web admin gui in this case, even if the host was in maintenance mode?</div><div>- power mgmt -> start from webadmin gui</div><div>(or power on button/virtual button at host side?)</div><div><br></div><div>Would be advisable to put inside power mgmt functionality some logic about os mgmt, so for example, if action is restart, first try to shutdown OS and only in case of failure power off/power on?</div><div><br></div><div>Thanks in advance,</div><div>Gianluca</div></div>
</blockquote></div><br></div></div></div><div class="gmail_extra">I see that one of the new features of 4.1 is Host restart through SSH</div><div class="gmail_extra">Power Mgmt --> SSH Mgmt --> Restart</div><div class="gmail_extra"><br></div><div class="gmail_extra">How does it fit in question above?</div><div class="gmail_extra">Can I choose this way after having run "yum update" on host?</div><div class="gmail_extra">Thanks</div><span class="m_3298193506265474951HOEnZb"><font color="#888888"><div class="gmail_extra">Gianluca</div></font></span></div>
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<br></blockquote></div><span class="HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div class="m_3298193506265474951gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Sandro Bonazzola<br>Better technology. Faster innovation. Powered by community collaboration.<br>See how it works at <a href="http://redhat.com" target="_blank">redhat.com</a></div></div></div></div></div></div></div></div>
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