​​On behalf of the Architecture Stage organizational committee I want to invite you to the DOU Day Conference!

It’ll take place offline in Kyiv on the 18th of May.

The thing is that if you buy a ticket now, you will get -50% off for the second one. So, a great opportunity to grab some tickets together with your teammates.

#event

A bundle of programming books by “No Starch Press” on Humble Bundle.

#books #programming

For today’s Donations Monday I want to remind you that a fundraiser from Come Back Alive for the Ukrainian snipers is still ongoing.

You can support it via this link: https://savelife.in.ua/sniping/

#donations #Ukraine

After reading this good retrospective article, I can say for sure:

#git is fine.

A new episode of our voice chat (in Ukrainian) is here!

We discussed OpenTofu and Terraform's license change in general and tried to find people, who already migrated to the new tool.

The episode is available on:

- YouTube
- Substack
- Spotify
- Apple Podcasts

#voice_chat

The core idea of this article is pretty simple: you need to protect your Terraform states. I don't think this is a debatable topic, and anyone has a different opinion on this matter.

To quote the article itself:

 an attacker can modify the Terraform state file it’s game over and bad times ahead.

However, in the very end, this article provides some suggestions that I never saw implemented IRL:

- Store the state lock in a separately permissioned location
- Use a read-only role for terraform plan executions

#terraform

I don’t know how many of you here work with networks, but if you do, there’s a book bundle for you to check out.

#books

​​For todays Donations Monday I want to share with you a fundraiser for 101 Starlink terminals by Dzyga Paw foundation:

https://dzygaspaw.com/starlinks-101

#Donations #Ukraine

I’m a bit busy this week, so there are going to be only some “low-effort” posts this week.

So, here’s a book bundle about data pipelines.

#books

A new (delayed) issue of the CatOps Digest is here!

https://newsletter.catops.dev/p/catops-digest-2024-03-24

Better late than never, right?

#digest #newsletter

Hey!

Let's close that Starlink fundraiser by Dzyga's Paw. There's less than $1k left, so I'm pretty sure we can make it today :D

#donations #Ukraine

Some time ago, I predicted that there is going to be more Kubernetes distributions. Then it didn’t happen, so I thought I was wrong.

Yet, now Canonical has introduced their Kubernetes distribution.

It’s based on the upstream Kubernetes 1.30, has some built-in add-ons, and yes, you can install it with snap.

#kubernetes

A neat comparison between Argo and Flux.

I like the fact that the article mostly focuses on UX and use cases. Yet, I would disagree with this statement here:

 would deploy one Argo CD per tenant, where each tenant is an independent developer team with their applications, but it can work with multiple clusters, for example, dev/stage/prod, etc.

I mean sure. If you have enough resources, go for it! However, I witnessed how getting down from “Argo per team” to “just one Argo” reduced resource consumption in a cluster by 90%.

#cicd #gitops

People often say that Observability is a Data problem. Although, it sounds correct intuitively, I cannot say that I fully understood how Data engineering approaches could be applied to the Observability systems.

This article about Wide Events clarified things for me a bit. Indeed, if any event that happened in the system is just an object with some value and useful metadata, things like metrics, logs, and traces become less relevant - it's all events now!

Apparently, this is how Observability is done in Meta, according to the author, and apparently people in Meta like it. I never worked for Meta, I don't know what they really use there and if it's better than the tools available to us mere mortals.

However, this is an interesting concept, and it would be wonderful to see similar projects that are not internal to the Big Tech companies.

#observability

Kondense is a Kubernetes tool that allows you resize contianers in a pod based on the memory pressure.

It’s installed as a sidecar and uses real-time memory pressure to determine the optimal memory for each containers in a pod.

You can read the justification behind this tool in this Reddit post

#kubernetes

RedHat reported a 10/10 vulnerability in the xz compression library.

The vulnerability provides remote backdoor access and present in xz 5.6.0 and 5.6.1.

There’s also an interesting discussion of this vulnerability on HackerNews:

 annoying - the apparent author of the backdoor was in communication with me over several weeks trying to get xz 5.6.x added to Fedora 40 & 41 because of its "great new features".

#security

For those who also had holidays.

Everything you need to know about the recent xz vulnerability in one place.

#security

A nice step-by-step guide of how to test a Python AWS Lambda function locally with LocalStack.

This guide doesn't cover fixtures in LocalStack, though. In my experience, adding fixtures into LocalStack is PITA, but I have a very specific scenario where I need to create a couple of thousands of S3 objects relatively fast.

#aws #serverless #python

I almost forgot to post it here.

Today I'm speaking at the GeekOpsUA Virtual Meetup (in Ukrainian) at 19:00 Kyiv time (18:00 CET).

There's no specific topic, it's going be just a fireside chat.

Here's the link you can join today

- GeekOpsUA on Telegram
- GeekOpsUA on LinkedIn
- GeekOpsUA on YouTube

See you there!

#event

Friday is a great day to listen to our CatOps voice chat (in Ukrainian)! Especially, since the topic of this episode is mental health and management.

We kinda slipped into discussing management at some point.

You can find the episode on:

- YouTube
- Substack
- Spotify
- Apple Podcasts
- RSS Feed

Enjoy!

#voice_chat

A new issue of the CatOps Newsletter is here:

https://newsletter.catops.dev/p/catops-digest-2024-04-07

#newsletter #digest