<div dir="ltr"><br><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jul 30, 2014 at 10:28 AM, Michael H. Warfield <span dir="ltr"><<a href="mailto:mhw@wittsend.com" target="_blank">mhw@wittsend.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On Wed, 2014-07-30 at 09:28 -0400, Jim Kinney wrote:<br>
> Stupid power strip can only monitor power usage. Addressable pdu was seen<br>
> as a waste of money. Sort of like cooling that shuts off and requires a<br>
> manual reset when there's a power hiccup.<br>
<br>
</div>Ah, it's not the monitoring. It's the ability to shoot the node in the<br>
head and force him to reboot. When all else fails, it's hard for a<br>
server to resist the removal of primary power to the power supplies. </blockquote><div><br></div><div>I am crafting a stonith script now to include in /root for emergencies. I have many machines with no remote power control.<br>
</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> In<br>
the past, I've always used X10 controllers as a poor man's PDU for<br>
controlling power to my colo units. Now, some relatively cheap web<br>
controlled power strips have become available that, when combined with a<br>
Raspberry Pi for access control and security, makes for a very powerful<br>
management solution.<br></blockquote><div><br></div><div>Adding a RasPi with a thermistor as a manage point for the next cooling system failure. Not much more and I can add stonith for the entire stack. Will need to figure out the vmware CLI method of suspending VMs. <br>
</div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
Corollary to that: Have a maintenance / forensice CD or USB drive in<br>
the system with serial consoles so you can intercept the boot process to<br>
an assured safe media to repair possible damage.<br>
<br>
Also... Before doing a forced reboot, if you have ANY control at all,<br>
sync and unmount your disks. SysRQ - S and U<br></blockquote><div><br></div><div>Will add that ability plus a "just shoot me" version with no safety as a last ditch fallback. <br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class=""><br>
> On Jul 30, 2014 9:18 AM, "Chris Fowler" <<a href="mailto:cfowler@outpostsentinel.com">cfowler@outpostsentinel.com</a>> wrote:<br>
<br>
> > Intelligent power strip.<br>
> ><br>
> > Power off. Power on.<br>
> ><br>
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Michael H. Warfield (AI4NB) | <a href="tel:%28770%29%20978-7061" value="+17709787061">(770) 978-7061</a> | mhw@WittsEnd.com<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">-- <br>James P. Kinney III<br><i><i><i><i><br></i></i></i></i>Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.<br>
- Speech 11/23/1900 Mark Twain<br><i><i><i><i><br><a href="http://heretothereideas.blogspot.com/" target="_blank">http://heretothereideas.blogspot.com/</a><br></i></i></i></i></div>
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