<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"><span style="font-family:arial,sans-serif;font-size:13px">I'm more accustomed to using PDUs for this type of thing. I.e., a<br>
</span><span style="font-family:arial,sans-serif;font-size:13px">power strip you can ssh into or hit via a web API to toggle power to<br></span><span style="font-family:arial,sans-serif;font-size:13px">individual ports.</span><br style="font-family:arial,sans-serif;font-size:13px">
<span style="font-family:arial,sans-serif;font-size:13px">Machines are configured to power up on power restore, plus PXE boot.<br></span><span style="font-family:arial,sans-serif;font-size:13px">You have less control than with IPMI -- all you can do is toggle power<br>
</span><span style="font-family:arial,sans-serif;font-size:13px">to the outlet -- but it works well, even for some desktop machines I<br></span><span style="font-family:arial,sans-serif;font-size:13px">have in a lab.</span><br style="font-family:arial,sans-serif;font-size:13px">
<span style="font-family:arial,sans-serif;font-size:13px">I don't have a compelling need, but I've often wondered if such a<br></span><span style="font-family:arial,sans-serif;font-size:13px">driver would be useful. I can imagine it also being useful if people<br>
</span><span style="font-family:arial,sans-serif;font-size:13px">want to power up non-compute stuff, though that's probably not a top<br></span><span style="font-family:arial,sans-serif;font-size:13px">priority right now.</span></blockquote>
<div><br></div><div>I believe someone was talking about this yesterday in the meeting. It would be very possible to write an IPMI driver (possibly being renamed for this reason) to control the power of a node via a PDU. You could then plug that into the agent driver as the power driver to create something like AgentAndPDUDriver. The current agent driver doesn't do anything with IPMI except set boot device. The inability to set boot device would be the biggest issue with a PDU driver as far as I can see, but that's not insurmountable.</div>
<div><br></div><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"><span style="font-family:arial,sans-serif;font-size:13px">How much hardware information do we intend to store in Ironic? (Note<br>
</span><span style="font-family:arial,sans-serif;font-size:13px">that I'm genuinely asking this, not challenging your assertion.) It<br></span><span style="font-family:arial,sans-serif;font-size:13px">seems reasonable, but I think there's a lot of hardware information<br>
</span><span style="font-family:arial,sans-serif;font-size:13px">that could be useful (say, lspci output, per-processor flags, etc.),<br></span><span style="font-family:arial,sans-serif;font-size:13px">but stuffing it all in extra[] seems kind of messy.</span></blockquote>
<div><br></div><div>Right now the hardware manager on the agent is pluggable, so what we're storing is currently "whatever you want!". I think in our current iteration, it is just the MACs of the NICs. We haven't fully fleshed this out yet.</div>
</div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">---<br>Josh Gachnang<br><div><span style="border-collapse:collapse;font-family:arial,sans-serif;font-size:13px">Tech Blog: ServerCobra.com, @ServerCobra<div>
Github.com/PCsForEducation</div></span></div></div></div>
<br><br><div class="gmail_quote">On Tue, Apr 8, 2014 at 10:46 AM, Matt Wagner <span dir="ltr"><<a href="mailto:matt.wagner@redhat.com" target="_blank">matt.wagner@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 08/04/14 14:04 +0400, Vladimir Kozhukalov wrote:<br>
<snip><div class=""><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
0) There are a plenty of old hardware which does not have IPMI/ILO at all.<br>
How Ironic is supposed to power them off and on? Ssh? But Ironic is not<br>
supposed to interact with host OS.<br>
</blockquote>
<br></div>
I'm more accustomed to using PDUs for this type of thing. I.e., a<br>
power strip you can ssh into or hit via a web API to toggle power to<br>
individual ports.<br>
<br>
Machines are configured to power up on power restore, plus PXE boot.<br>
You have less control than with IPMI -- all you can do is toggle power<br>
to the outlet -- but it works well, even for some desktop machines I<br>
have in a lab.<br>
<br>
I don't have a compelling need, but I've often wondered if such a<br>
driver would be useful. I can imagine it also being useful if people<br>
want to power up non-compute stuff, though that's probably not a top<br>
priority right now.<div class=""><br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
1) We agreed that Ironic is that place where we can store hardware info<br>
('extra' field in node model). But many modern hardware configurations<br>
support hot pluggable hard drives, CPUs, and even memory. How Ironic will<br>
know that hardware configuration is changed? Does it need to know about<br>
hardware changes at all? Is it supposed that some monitoring agent (NOT<br>
ironic agent) will be used for that? But if we already have discovering<br>
extension in Ironic agent, then it sounds rational to use this extension<br>
for monitoring as well. Right?<br>
</blockquote>
<br></div>
How much hardware information do we intend to store in Ironic? (Note<br>
that I'm genuinely asking this, not challenging your assertion.) It<br>
seems reasonable, but I think there's a lot of hardware information<br>
that could be useful (say, lspci output, per-processor flags, etc.),<br>
but stuffing it all in extra[] seems kind of messy.<br>
<br>
I don't have an overall answer for this question; I'm curious myself.<span class="HOEnZb"><font color="#888888"><br>
<br>
-- Matt</font></span><div class="HOEnZb"><div class="h5"><br>
<br>
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