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<div class="moz-cite-prefix">Le 14/10/2014 01:46, Adam Lawson a
écrit :<br>
</div>
<blockquote
cite="mid:CAJfWK4_dMmCmfUcCUqeeiMV1_u7gRJU2P3157S-xVKtZ7YOYyA@mail.gmail.com"
type="cite">
<div dir="ltr">
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><i><span
style="font-family:arial,sans-serif;font-size:13px">I
think Adam is talking about this bp: </span><a
moz-do-not-send="true"
href="https://blueprints.launchpad.net/nova/+spec/evacuate-instance-automatically"
target="_blank"
style="font-family:arial,sans-serif;font-size:13px">https://blueprints.launchpad.net/nova/+spec/evacuate-instance-automatically</a><span
style="font-family:arial,sans-serif;font-size:13px"> </span></i></blockquote>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px">Correct
- yes. Sorry about that. ; )</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px">So
it would seem the question is not whether to support
auto-evac but how it should be handled. If not handled by
Nova, it gets complicated. Asking a user to configure a
custom Nagios trigger/action... not sure if we'd recommend
that as our definition of ideal.</span></div>
<div>
<ul>
<li><span
style="font-family:arial,sans-serif;font-size:13px">I
can foresee Congress being used to control whether
auto-evac is required and what other policies come into
play by virtue of an unplanned host removal from
service. But that seems like a bit overkill.</span><br>
</li>
<li><span
style="font-size:13px;font-family:arial,sans-serif">i
can foresee Nova/scheduler being used to perform the
evac itself. Are they still</span><span
style="font-size:13px;font-family:arial,sans-serif"> pushing
back?</span><br>
</li>
<li><span
style="font-family:arial,sans-serif;font-size:13px">I
can foresee Ceilometer being used to capture service
state and define how long a node should be inaccessible
before it's considered offline. But seems a bit out of
scope for what ceilometer was meant to do.</span><br>
</li>
</ul>
</div>
</div>
</blockquote>
<br>
Well, IMHO Gantt should just enforce policies (possibly defined by
Congress or whatever else) so if a condition is not met (here, HA on
a VM), it should issue a reschedule. That said, Gantt is not
responsible for polling all events and updating its internal view,
that's another project which should send those metrics to it. <br>
<br>
I'm not having a preference in between Heat, Ceilometer or whatever
else for notifying Gantt. I even think that whatever the solution
would be (even a Nagios handler), that's Gantt at the end which
would trigger the evacuation by calling Nova to fence that compute
node and move the VM to another host (like rescheduling already
does, but in a manual way).<br>
<br>
<br>
-Sylvain<br>
<br>
<br>
<blockquote
cite="mid:CAJfWK4_dMmCmfUcCUqeeiMV1_u7gRJU2P3157S-xVKtZ7YOYyA@mail.gmail.com"
type="cite">
<div dir="ltr">
<div><span style="font-family:arial,sans-serif;font-size:13px">I'm
all about making this super easy to do a simple task though,
at least so the settings are all defined in one place. Nova
seems logical but I'm wondering if there is still
resistance.</span><br>
</div>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px">So
curious; how are these higher-level discussions
initiated/facilitated? TC?</span></div>
<div><span style="font-family:arial,sans-serif;font-size:13px"><br>
</span></div>
</div>
</blockquote>
I proposed a cross-project session at the Paris Summit about
scheduling and Gantt (yet to be accepted), that usecase could be
discussed there.<br>
<br>
-Sylvain<br>
<br>
<blockquote
cite="mid:CAJfWK4_dMmCmfUcCUqeeiMV1_u7gRJU2P3157S-xVKtZ7YOYyA@mail.gmail.com"
type="cite">
<div class="gmail_extra"><br clear="all">
<div>
<div dir="ltr">
<div><font>
<div style="font-family:arial;font-size:small"><b><i><br>
Adam Lawson</i></b></div>
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<div style="font-family:arial"><br>
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<div style="font-family:arial;font-size:small">AQORN,
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moz-do-not-send="true"
src="http://www.aqorn.com/images/logo.png" height="39"
width="96"><br>
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<br>
<div class="gmail_quote">On Mon, Oct 13, 2014 at 3:21 PM,
Russell Bryant <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:rbryant@redhat.com" target="_blank">rbryant@redhat.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex"><span
class="">On 10/13/2014 06:18 PM, Jay Lau wrote:<br>
> This is also a use case for Congress, please check
use case 3 in the<br>
> following link.<br>
><br>
> <a moz-do-not-send="true"
href="https://docs.google.com/document/d/1ExDmT06vDZjzOPePYBqojMRfXodvsk0R8nRkX-zrkSw/edit#"
target="_blank">https://docs.google.com/document/d/1ExDmT06vDZjzOPePYBqojMRfXodvsk0R8nRkX-zrkSw/edit#</a><br>
<br>
</span>Wow, really? That honestly makes me very worried
about the scope of<br>
Congress being far too big (so early, and maybe period).<br>
<div class="HOEnZb">
<div class="h5"><br>
--<br>
Russell Bryant<br>
<br>
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