hi all,
We will have food for thouht at our admins meeting later this week. We have 4 servers in our cabinet all quite old and all donated second hand: two IBM X3250s (I think) and two SUN ultras. The solutions suggested are all very good but probably beyond what I would be allowed to spend. Donations are down, rent has stayed the same and the only good point is that staff are allowed to work at home, so renting more space won't happen.
Stuart
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Sent: Tuesday, June 01, 2021 at 1:15 PM
From: "John Hearns via GLLUG" <gllug@mailman.lug.org.uk>
To: "The mailing list for the Greater London Linux User Group" <gllug@mailman.lug.org.uk>
Cc: "John Hearns" <hear...@gmail.com>
Subject: Re: [GLLUG] Power control over IP
From: "John Hearns via GLLUG" <gllug@mailman.lug.org.uk>
To: "The mailing list for the Greater London Linux User Group" <gllug@mailman.lug.org.uk>
Cc: "John Hearns" <hear...@gmail.com>
Subject: Re: [GLLUG] Power control over IP
Regarding iDRAC there is a comprehensive overview of the various features here
Put simply, yes iDRAC supports IPMI.
I always advise getting the Enterprise license - you can get a months trial license too.
If that is overwhelming you (it probably does) drop am an email offline.
On Tue, 1 Jun 2021 at 10:57, Marco van Beek via GLLUG <gllug@mailman.lug.org.uk> wrote:
As many others have already said. the ideal is if this is part of the
baseboard management tool of the servers. Although both DELL and HP call
it by their own names (and often charge extra for additional features)
the generic term is IPMI, or Intelligent Platform Management Interface
(https://en.wikipedia.org/wiki/Intelligent_Platform_Management_Interface).
However, you do have to buy servers that support this, but it gives you
a lot of control, and is a lot cheaper that a compilation of a networked
KVM and a networked PDU. In most cases it is brought out as a separate
Ethernet port on the back of the server, which means you can run it on a
completely separate network should you wish for security purposes.
IPMI systems usually includes the ability to boot of remote media, like
the CD-ROM of your own computer, so you can analyse (and often fix)
corrupt boot drives without leaving home. As long as you have power to
the server (and the switch the IPMI is plugged in to, of course), you
have the ability to start fixing it.
These days when I buy a new server, we never even plug a screen or
keyboard in to it. We just do enough of the install over the KVM
interface that comes with the IPMI system, and then carry on with SSH as
an when the server is booted.
Even without a license the HP "integrated Lights Out" system will still
allow basic troubleshooting until the OS boots. I haven't played with
Dell's system, but I am sure someone on the list can confirm. We use
SuperMicro servers and if you get a motherboard with IPMI, they come
fully featured.
So I suggest looking on the back of the servers you already have and see
if there are any unexplained Ethernet ports, usually located in a
different place to the main Etherports the OS uses. As some else said,
maybe you already have some servers with the functionality you need.
Regards,
Marco
On 29/05/2021 16:19, stuart taylor via GLLUG wrote:
> Hi all,
>
> During the past 15 months I have managed to change various things involving our systems, for the better I think. We have also gained various part time volunteer admins, who are very good, mostly better than I am. One of them showed me how he could power down his servers remotely over IP, and restart them again. This looks very useful as we are spending less time at the building and mostly working from home. I have previously managed to obtain a cabinet, for our servers, change the lock for a padlock based system and restrict the key holders to a few people. This means switching servers on, or off, is better controlled, but also makes it more difficult for the admins to reboot when they are at home. Can anyone point me towards a suitable 'power supply over IP' solution? Are there any drawbacks to using these?
>
> Stuart
>
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