Hi Ranga, <br><br><br>comments inline,<br clear="all"><br><br><div class="gmail_quote">On Tue, Oct 27, 2009 at 6:41 PM, Rangababu Chakravarthula <span dir="ltr"><<a href="mailto:rbabu@hexagrid.com">rbabu@hexagrid.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font face="arial, sans-serif"><span style="border-collapse: collapse;"><div>Opennebula team,</div>
<div><br></div><div>(a) What mechanism does Opennebula use to monitor hosts? </div></span></font></blockquote><div><br>It sends probes (scripts) using ssh<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<font face="arial, sans-serif"><span style="border-collapse: collapse;"><div><br></div><div>(b) I would like to know how we can migrate VM's in the following two scenarios.</div><div><br></div><div>(1) The host might be up but due to some network issues, opennebula is not able to monitor the host. </div>
<div><span style="white-space: pre;"> </span>(a) Does it move the host status to ERR? </div></span></font></blockquote><div><br>Yep, but it keeps trying to monitor them<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<font face="arial, sans-serif"><span style="border-collapse: collapse;"><div><span style="white-space: pre;"> </span>(b) What does it do to the VM's. Does it move to a different state? </div></span></font></blockquote>
<div><br>No, it tries to connect to them.<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font face="arial, sans-serif"><span style="border-collapse: collapse;">
<div><span style="white-space: pre;"> </span>(c) Is there a mechanism to automatically migrate those VM's to different host?</div></span></font></blockquote><div><br>If the host is unreachable, this is tough to do.<br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font face="arial, sans-serif"><span style="border-collapse: collapse;"><div><br></div>
<div>(2) When somebody manually shutdown the host. Vm's on that host are not accessible anymore for users. </div>
<div>Is there a way during the shutdown sequence we can trigger a script to migrate the VM's ? Because, by the time opennebula</div><div>finds that host is down users will get effected. How to address this?</div></span></font></blockquote>
<div><br>This is tricky. If the physical host is shuttted down, there is virtually not a lot you can do, appart from maybe starting the VMs again in another host.<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<font face="arial, sans-serif"><span style="border-collapse: collapse;"><div>
<br></div><div>Thanks</div><div>Ranga</div></span></font></blockquote><div><br>Hope it helps,<br><br>-Tino<br> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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