[CentOS-virt] AWS c5d.9/18xlarge instances not supported

Sat Jul 14 15:33:31 UTC 2018
Jens-Uwe Schluessler <jens-uwe.schluessler at tu-dresden.de>

It seems, c5d.9xlarge and c5d.18xlarge are excluded by intention, already
grayed out in AWS instance start console.
Other providers (RH) enable them too.

-----Ursprüngliche Nachricht-----
Von: CentOS-virt <centos-virt-bounces at centos.org> Im Auftrag von Nico
Gesendet: Samstag, 14. Juli 2018 14:22
An: Discussion about the virtualization on CentOS <centos-virt at centos.org>
Betreff: Re: [CentOS-virt] AWS c5d.9/18xlarge instances not supported

On Sat, Jul 14, 2018 at 7:41 AM, Jens-Uwe Schluessler
<jens-uwe.schluessler at tu-dresden.de> wrote:
> Hi,
> why are larger AWS instances c5d.9xlarge and c5d.18xlarge (NVMe SSD
> attached) NOT supported by Centos7 AMI,

It wouldn't be the first time. I had problems with the i3 instances when
they first came out, and I've been dealing with kernel/hardware
incompatibilities with Linux kernels since.... 2000. New hardware, and even
new virtualization toolkits that interact with both the supporting hardware
and the virtualization layer, can have startling interactions. That's why
testing is so critical.

> while smaller instances (e.g. c5d.4xlarge) are supported?
> Also regular c5.9/18xlarge are supported.

See above. Also, the base CentOS 7 3.10.0 kernel is becoming a bit
dated: it's 5 years old now. If you have time: can you set up a smaller
instance, do kernel updates on top of a CentOs 7 AMI, and see if *that* AMI
is compatible with the new instances? Might make for an interesting test and
get you a working AMI.
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