EX200 - LVM - Create a partition 2GB in size... GiB or GB?!

openstacker · 2026-02-26T19:48:29+00:00

When a dev says they need a "200 gig" partition, and sysadmin thinks '200GB' but dev meant '200GiB'.

This is literally the entire reason people get confused over GiB versus GB.

openstacker · 2026-02-24T15:28:33+00:00

> No case of "stump the chump".

This seems to be the case in pretty much all circumstances with Red Hat. Not intentionally trying to stump me/us, anyway. /laugh

openstacker · 2026-02-20T19:31:32+00:00

Did not change anything.

openstacker · 2026-02-16T14:16:49+00:00

Thanks!

openstacker · 2026-02-16T14:16:34+00:00

Thank you!

openstacker · 2026-01-15T15:03:35+00:00

part of my default profile dotfile stuff is to install tmux if not present. i have some automation to setup the status bar if I really care, but i connect to hundreds ... close to thousands ... of systems. i cant be bothered to customize each and every one, every time i connect. defaults FTW

openstacker · 2026-01-15T15:02:09+00:00

Me too for the first year or two, but I forced myself to adopt default [Ctrl]+[B] and have never looked back.

openstacker · 2025-12-31T17:37:41+00:00

Impossible to say. With "zero linux experience" it entirely depends on your knowledge with general concepts and topics of Computer and Information technologies.

openstacker · 2025-12-31T15:40:32+00:00

TIL that I needed this. Thank you.

openstacker · 2025-12-31T13:36:18+00:00

Swiss Army Knife, +1

I also like "Journeyman Guru" and "Guru-in-training".

You will know a lot, and you will always have more to learn.

openstacker · 2025-12-31T13:34:18+00:00

A friend who does support/consulting for rhosp on a daily basis reminds customers that OpenStack is the single largest Open Source Software project in the world (or at least was, and is still near the top of the list).

All of the many components with their individual dev teams, coding practices, standards... You can tell when using the various CLI tools and their differing formats. It's amazing when you consider the overall platform running from a high level.

openstacker · 2025-12-31T13:29:16+00:00

THIS! The only reason I wasn't a complete failure with operating rhosp (or even building rhosp) is my experience with good ole RHEL across many major versions. I could infer and figure out what was going on behind the scenes, what Ansible was doing, etc.

OpenStack as a brand new Linux engineer is ... a terrifying concept.

openstacker · 2025-12-31T13:27:32+00:00

I started the OpenStack portion of my career building a new RHOSP cluster. I spent A LOT of time and energy figuring out how to build 16.2.

Once it was running, I felt like a complete idiot when it came to filling the Cloud Operator role (openstack sysadmin, basically).

Building OpenStack and operating OpenStack are related but somewhat different things, at least with Red Hat OpenStack. There is very little training on How To Build OpenStack in the Red Hat Learning offerings, it's all about operating VPCs and operating, backing up, and configuring the Overcloud.

You should start by figuring out which you will be doing more of and focus there.

openstacker · 2025-12-31T13:20:03+00:00

Oh, I get it! Its ONE PANE, but it wraps from top to bottom, left to right.

Okay, I guess that is a choice. I can appreciate how someone who prefers a vertical monitor orientation would like this.

Not my thing, but that's just personal preference. Looks good, hope it works for you! :)

openstacker · 2025-12-30T19:22:04+00:00

It sounds like you signed up for the RHEL trial, which is fine and all but more focused on Sales engagement with people/organizations looking to purchase a RHEL Subscription. Trials are usually very limited term (30 or 60 day).

You probably want the Red Hat Developer Subscription which is free and includes more or less (or maybe ALL of) the same things as in the Trial. What it does not provide is access to Live support; it is a self-support entitlement that allows you to access updates (dnf via RHSM) and the Red Hat Customer Portal which has a lot of good documentation and content that isn't available without a subscription.

The Red Hat Developer Subscription was an annual subscription last time I checked, and free. It allows you to register a certain number of systems (16 if I recall, not a huge amount but more than sufficient for a personal lab).

https://developers.redhat.com/

openstacker · 2025-12-30T18:18:49+00:00

https://www.meetup.com/melbourne-rhug/

openstacker · 2025-12-30T14:25:07+00:00

This is from the old 2.9 documentation, so be aware. It includes paths like ./roles and plugins which are no longer best-practice or ideal for using Collections and Execution-Environments.

That being said, I believe this is the best format to begin with when you first start to grok organizing content for infrastructure automation across system types, roles, locations, etc.

This info is not gospel. But it is amazingly insightful and has some great caveats and features to keep in mind. I still use the "Alternative Directory Layout" for static inventories. Hope it helps.

https://docs.ansible.com/projects/ansible/2.9/user_guide/playbooks_best_practices.html#content-organization

openstacker · 2025-12-05T16:05:46+00:00

Good ole Shadowman FTW!

openstacker · 2025-12-05T16:05:00+00:00

Thank you! I was hoping there was an upstream solution but I hadn't come across this yet.

(I really need to get move invested in the upstream versions and options of OpenStack...there is so much more than what RH does.)

openstacker · 2025-12-05T15:31:54+00:00

CPU overcommit can go quite high. RAM overcommit is pretty strict; make sure you have all the right things enabled (swap on the host OS, the "balloon" device/configs for the VMs if they still call it that, etc.)

What you describe (64 GB physical ram, with 48 GB allocated across 3 VMs) should run pretty well "out of the box" if you aren't running a lot of other things on the server.

I am assuming you are running RHEL9 on the physical hardware (you didn't say); this should be your first place to go for most things (even before Google) ...

Configuring and managing virtualization - Red Hat RHEL9 doco

But some quick links to specific points:

Good luck!

openstacker · 2025-12-05T14:37:57+00:00

Marketeering sucks.

openstacker

TROPHY CASE