CatOps

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DevOps and other issues by Yurii Rochniak (@grem1in) - SRE @ Preply && Maksym Vlasov (@MaxymVlasov) - Engineer @ Star. Opinions on our own.
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CatOps

13 Dec, 18:03

I didn't pay enough attention yesterday, so I didn't post the second part of the article about Argo CD :\

Let's fix it! Here it is. This second part focuses on the .source configuration parameter of ApplicationSet.

#cicd #argocd

Demystifying ArgoCD's ApplicationSet — Pt. 2

A home for poorly researched ideas that I find myself repeating a lot anyway.

Demystifying ArgoCD's ApplicationSet

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CatOps

12 Dec, 16:14

One of the members of our community wrote an article about ArgoCD, more specifically about generators in an ApplicationSet.

This article has words "Part I" in it, so I hope that other parts are ready as well, since there is a golden rule: do not publish parts unless you have all of them ready :D

#cicd #argocd

Demystifying ArgoCD's ApplicationSet — Pt. 1

A home for poorly researched ideas that I find myself repeating a lot anyway.

Demystifying ArgoCD's ApplicationSet

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CatOps

8 Dec, 21:02

A new CatOps Digest is here!

https://newsletter.catops.dev/p/catops-digest-2024-12-08

#digest #newsletter

CatOps Digest 2024-12-08

What was on CatOps in the last couple of weeks

CatOps Digest 2024-12-08

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CatOps

4 Dec, 18:50

Regardless my feelings about Python, it's still a very popular language among the platform people.

So, here is a bundle of Python books by Pearson that I forgot to share with you earlier!

This offer is still valid for 7 days. As usual, you can pay about €25 to unlock the whole bundle.

#books #programming #python

Humble Tech Book Bundle: Become a Python Expert by Pearson Encore

Whether you’re a newbie or pro, this Python programming bundle will help you master the ins and outs of this ubiquitous programming language.

Python Book Bundle

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CatOps

3 Dec, 11:30

00:07

And to re:Invent announces:

AWS accidentally reinvented a few things once again like "K8s administrator not needed anymore" and "DBA not needed anymore" which means that these folks will have a wonderful opportunity to automate some toil work 🥳

If you haven't checked out yet Top announcements of AWS re:Invent 2024, they are pretty decent

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CatOps

2 Dec, 17:44

For today’s Donations Monday I would like to remind you of a standing jar of my German teacher.

https://send.monobank.ua/jar/8jQSHW57kP

He’s also a volunteer and he uses this jar to address ongoing requests from the combatants.

These things may not be as favorable to the media compared to some other equipment, but it doesn’t make it not important.

#donations #Ukraine

Monobank Jar

1.4k 1 0 1

CatOps

29 Nov, 19:38

Another interesting article from our chat.

As you probably already know, Terraform has introduced ephemeral values in version 1.10. The goal is to address the long-standing issue with credentials in the state file.

However, there is also a great complimentary article by a HashiCorp developer, who worked on this feature, with the detailed justification. Honestly, this article is a good read!

#terraform #hashicorp

Terraform 1.10 improves handling secrets in state with ephemeral values

Terraform 1.10 is generally available, and it includes ephemeral values along with improvements to plan and apply performances.

Terraform 1.10 improves handling secrets in state with ephemeral values

Ephemeral Values in Terraform

CatOps Chat (in Ukrainian)

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CatOps

27 Nov, 15:06

AWS at last allowed users to serve assets from private networks via CloudFront.

https://aws.amazon.com/about-aws/whats-new/2024/11/amazon-cloudfront-vpc-origins/

In the announcement, they mention simplification of operations and security, but not cost, and you have to pay for public traffic in AWS. So, not sure, what are the hidden costs of this new feature.

#aws

Amazon CloudFront announces VPC origins - AWS

Discover more about what's new at AWS with Amazon CloudFront announces VPC origins

Amazon CloudFront announces VPC origins

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CatOps

26 Nov, 13:03

A critical view point on OpenTelemetry implementation from VictoriaMetrics.

In nutshell, the idea is good, but the implementation is too bloated, which often happens when the aim is to provide a one-size-fits-all solution.

As a commenter pointed out in a Reddit discussion:

problem is they are right, otel is a simple idea standardize observability. However when you get every vendor involved it can expand to a huge project very quick.

#observability #otel

OpenTelemetry Is Too Complicated, VictoriaMetrics Says

To say the folks at VictoriaMetrics aren’t big fans of OpenTelemetry after implementing its metrics library would be putting it mildly. “OpenTelemetery is

OpenTelemetry Is Too Complicated, VictoriaMetrics Says

Reddit Discussion

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CatOps

25 Nov, 12:21

Our friends from UA DevOps continue raising funds for the special operation forces on the Kursk direction.

You can join the fundraiser here:
https://send.monobank.ua/jar/oyWPJi2ER

#donations #Ukraine

Monobank Jar

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CatOps

24 Nov, 16:27

A new issue of the CatOps Digest is available!

https://newsletter.catops.dev/p/catops-digest-2024-11-24

#digest #newsletter

CatOps Digest 2024-11-24

I've missed one week again, I'm sorry...

CatOps Digest 2024-11-24

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CatOps

23 Nov, 17:15

A nice overview of the evolution of Bluesky by Gergely Orosz and Elin Nilsson.

Bluesky is a decentralized social network which was born as an alternative to Twitter. It’s super interesting that for almost half a year Bluesky only had 2 engineers and even today the team behind the whole platform is rather small.

It’s also interesting that infrastructure wise they have started with AWS and Pulumi and eventually moved to their own equipment for cost savings.

#architecture

Building Bluesky: a Distributed Social Network (Real-World Engineering Challenges)

Bluesky is built by around 10 engineers, and has amassed 5 million users since publicly launching in February this year. A deep dive into novel design decisions, moving off AWS, and more.

Building Bluesky: a Distributed Social Network (Real-World Engineering Challenges)

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CatOps

21 Nov, 17:46

Thoughtworks have published their usual TechRadar. You can also get the full PDF report there there.

This tech radar provides some valuable insights into the industry. Besides, this is already the 31st volume, so you can compare it with previous versions. Just keep in mind that this tech radar (as any other) is biased, because it basically represents the Thoughtworks' customer base, thus it's not universal.

#tech_radar

Technology Radar | Guide to technology landscape

The Technology Radar is an opinionated guide to today's technology landscape. Read the latest here.

Technology Radar

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CatOps

20 Nov, 13:13

Where you good at math in school?

Humble Bundle sales a collection of Math for Programmers books. One of the books is from the “Grokking” series. I’ve heard that series is a good one.

Also, one of the books is written by a Ukrainian author. You can read an interview with him on DOU (in Ukrainian).

#books

Humble Tech Book Bundle: Math for Programmers 2024 by Manning

Strengthen your math skills in programming with this library of coding and programming courses. Pay what you want and support the charity of your choice.

Math for Programmers

Автор книги «Геометрія для програмістів» розповідає, як математика допомагає в роботі розробника

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CatOps

19 Nov, 17:47

An article and a CNCF NA talk about Atlas - a tool to manage database migrations, and specifically about the Atlas Operator - a way of managing database state in Kubernetes. It's important to point out, that the database itself doesn't have to reside in Kubernetes.

Except some advertisement for Atlas, this article actually points out problems of executing migrations that are not limited to K8s. Still, even though this is an article about a tool from a creator of the tool, I think both blogpost and the tool itself are interesting.

But to be completely fair, there's also the SchemaHero tool - a truly open source one.

#databases #kubernetes

The Hard Truth about GitOps and Database Rollbacks | Atlas | Manage your database schema as code

Prepared for KubeCon North America 2024

The Hard Truth about GitOps and Database Rollbacks

SchemaHero is an open-source database schema migration tool

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CatOps

18 Nov, 10:51

A new fundraiser for the International Legion, where my friend's brother serves.

https://send.monobank.ua/jar/7wNX44oe8W

This is a fundraiser for ongoing expenses such as car repairs and Starlink fees. The goal is 80k UAH and about a half is achieved already.

#donations #Ukraine

Безпечний переказ коштів

Надсилайте безкоштовно та безпечно кошти

3 бат ОБСпП Легіон

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CatOps

16 Nov, 13:03

You have likely seen this already, but still.

Prometheus 3.0 is available!.

Notable changes (as listed in their release page):

- New UI
- Remote Write 2.0
- Native histograms
- Improved UTF-8 and OTLP (OTel Protocol l)support
- Better performance

#observability #prometheus

Announcing Prometheus 3.0 | Prometheus

An open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach.

Announcing Prometheus 3.0

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CatOps

14 Nov, 14:34

You have a Database that can be affected by Disk corruption, and you have millions of transactions? Well, good for you that nothing bad happens yet.

But what if I say that there is better solution, x1000 faster and safer? Just send 0.1BTC called TigerBeettle.

Also, it has of the best presentation what I ever saw. Check it

Testing simulation showed at the end, if you want to try yourself - sim.tigerbeetle.com

#databases

The financial transactions database to power the next 30 years of Online Transaction Processing.

Watch presentation

Play simulation

Check codebase

2k 1 14 5

CatOps

13 Nov, 15:18

A brief overview of how to choose the right size for your RDS instance in AWS.

Although, I would argue that certain workloads would already experience problems at 80%+ CPU load on CPU. So, sometimes it doesn't make sense to wait the whole four-week evaluation period.

Also, make sure to keep track of your reserved instances: you don't want to pay more than you should when jumping between instance types!

#aws #databases

How to - Choose the Right Instance Size for AWS RDS

Amazon RDS (Relational Database Service) offers a variety of instance types, each optimized for different workloads.

Choose the Right Instance Size for AWS RDS

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CatOps

12 Nov, 13:39

25 years of Google data-center networking evolution is a sneak peek into Google's internal network, phases of its evolution through the company's history, as well as technologies that allow them to handle up to 13 Petabits/sec of bisectional bandwidth.

I especially liked this quote:

network is the foundation of reliability for all other compute services, from storage to AI. As such, the network must fail last and fail least.

#networking