<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Apr 8, 2018 at 5:33 PM, ~Stack~ <span dir="ltr"><<a href="mailto:i.am.stack@gmail.com" target="_blank">i.am.stack@gmail.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 03/28/2018 05:31 AM, Fedele Stabile Nuovo Server wrote:<br>
> My question is mainly addressed at those of you who use oVirt not only<br>
> for creating services on virtual machines.<br>
> What is your experience and what did you made?<br>
<br>
</span>Still consider myself an oVirt newb. Only been using it for a few months<br>
but I'm liking it so far. I don't have the hardware specs in front of me<br>
but I have a 4 node Hypervisor setup with a physical Engine host. All<br>
running on Scientific Linux 7.<br>
<span class=""><br>
> Is there anyone who virtualized an HPC cluster?<br>
<br>
</span>I'm still not convinced that virtualized HPC is a good idea for those<br>
who need compute performance. Though it is getting better than when I<br>
first heard someone say they were doing it at Supercomputing14!<br>
<span class=""><br>
> What is for you the advantage on virtualizing a cluster?<br>
<br>
</span>Um. As a 14year HPC admin, I still say none for compute. However, I am<br>
using oVirt to support a ton of my infrastructure services: Frontends,<br>
Log-ins, Scheduler, Database, LDAP, ect.<br>
<br>
I'm still learning how to set up something where my users can click a<br>
button on a webpage and get a VM spun up for a Graphical session on<br>
oVirt. I'm also still debating on the pros/cons for setting up oVirt<br>
VM's for things like JupyterNotebooks/RStudio Server/ect for the "I just<br>
want a web page to develop my code on and will submit to the cluster for<br>
the job run" crowd.<br></blockquote><div><br></div><div>Few options to consider:</div><div>1. oVirt user portal (with VM pools perhaps?)</div><div>2. vagrant with the oVirt provider</div><div>3. ManageIQ service portal</div><div>4. Ansible playbooks - a simple rule could suffice for most tasks.</div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
It is a huge learning process for me. Most of the tools I've been using<br>
have worked great for years, but it is time to update and refresh those<br>
skills. Most of the provisioning tools I've used in the past don't work<br>
so well with oVirt. So now I'm exploring other tools.<br>
<br>
Foreman is and overcomplicated buggy headache, IMO. Every time I or a<br>
coworker has tried to get it going it has been a massive<br>
time-suck-crash-and-burn. Add to it that my current security team has<br>
HUGE issues with Puppet (don't get me started - I like Puppet) and<br>
building Foreman by hand with Salt is just an awful awful awful<br>
experience I wouldn't wish on an enemy...just no. :-)<br>
DigitalRebar was looking SUPER promising, but they recently went to a<br>
model that MUST chat out to the Internet or it breaks itself (a complete<br>
no-go for me). A complete shame.<br>
So I'm back to Cobbler which is simple and works fantastically well, but<br>
doesn't really have any integrations into oVirt (that I'm aware of). I'm<br>
probably going to have to write something with the two API's.<br></blockquote><div><br></div><div>Provisioning VMs and customizing them using cloud-init may be a viable option.</div><div>Y.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<span class=""><br>
<br>
> Or, having a class with PC or Raspberry is better to use LTSP or PiNet<br>
> or virtualize desktops?<br>
</span>Can't say. Don't mess with Raspberry Pi's much.<br>
<span class="HOEnZb"><font color="#888888"><br>
~Stack~<br>
<br>
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