CatOps

18 Jun 2024 11:20

A new DevOps book bundle on Humble Bundle.

It has some well-known books on Kubernetes, Terraform, Ansible, and other stuff. Also, these are O'Reilly books, which should be good.

#books

CatOps

14 Jun 2024 14:42

There are some articles-cheat sheets that are very useful in certain circumstances.

For example, here's a nice cheat sheet for reassignment of Kafka partitions. As you may know, Kafka doesn't reassign partitions automatically when new brokers are added or removed from a cluster.

Save this one just in case, especially if you have Kafka somewhere.

#kafka #cheatsheet

CatOps

12 Jun 2024 20:44

My talk from DevOps FW Days 2024 about Helm charts testing is available on YouTube now!

All the code that I used for the demo is available on GitHub as well!

The talk is in Ukrainian, but I'll write a blog post in English on this topic soon (tm) - I've just wanted to ensure that the materials are publicly available on the FW Days side, so I don't violate any policies.

#slides #helm #kubernetes

CatOps

10 Jun 2024 11:35

​​Last week it was the 7th (!) time we had the DevOps Days Ukraine conference!

One of the important part of it, apart from presentations and open space discussions, is to raise funds for Ukrainian charities.

We've been working with the UA Responders foundation for a couple of years already, and this time we've been raising funds for a surgical aspirator for Dnipro University Hospital.

We have a €1000 goal and just a couple of hundreds below the target. So, we can easily make it with your support!
#donations#Ukraine

CatOps

07 Jun 2024 18:07

Bees With Machine Guns is a tool to load test web applications.

The main difference from other popular tools like Vegeta is that in this case instead of using a single CLI, the tool creates a "swarm" of micro instances in AWS to emulate a DDoS attack so the load originates from multiple points, not a single one.

#security

CatOps

04 Jun 2024 12:09

​​DevOps Days Ukraine 2024 is starting today!

Meet wonderful people, who will talk you through security and also make sure to check out open space rooms to discuss various topics with your peers!

Just to name a few speakers:

- Nazar Tymoshyk — CERT-UA State Communications Engineer
- Anastasiia Voitova — Head of Security Engineering at Cossack Labs
- Brian Tarbox — Principal Solutions Architect at Caylent
- Rotem Refael — Director of Engineering and open-source ARMO
- And many more!

Check out the agenda & register for free 👉 https://www.devopsdays.com.ua

#event

CatOps

01 Jun 2024 12:46

A nice read about ArgoCD.

What I especially liked about it is that it goes beyond your typical “hello world” examples and also touches topics like multi cluster deploys, app-of-apps pattern, and encryption.

#argocd #cicd

CatOps

30 May 2024 11:54

As you may know, I'm a part of the DevOps Days Ukraine organizers committee, and I'm proud to finally present you this year conference!

This year, the focus of the conference is security.

We'll discuss context-based security, cloud hacking scenarios, information security in the cloud, defense against cyberattacks and the complexities of cyber warfare, vulnerability management implementation with AWS services, OWASP Top Web Application Security Risks, and more.

Just to name a few speakers: Nazar Tymoshyk — CERT-UA State Communications Engineer, Anastasiia Voitova — Head of Security Engineering at Cossack Labs, Brian Tarbox — Principal Solutions Architect at Caylent, Rotem Refael — Director of Engineering and open-source ARMO, and many more!

Check out the agenda & register for free 👉 https://www.devopsdays.com.ua

When? June 4-5
Where? Online

And of course, there are going to be open space discussions after each day of the conference!

See you there!

CatOps

28 May 2024 12:15

An old but great article about load balancing by Matt Klein - the creator of Envoy Proxy.

"Load balancing" is the term we often throw around, so it's always a good thing to take a glance on how does it work.

Another old article is a comparison of the circuit breaking functionality between Envoy (and inherently Istio) and Netflix Hystrix, which is a dedicated circuit breaker library.

#networking

CatOps

22 May 2024 12:16

​​This channel was created exactly 7 years ago. So yeah, today is CatOps' bithday!

Fun fact: this channel had a different name when it was created, but was renamed to CatOps shortly after.

Another fact: y'all know that I usually post donation requests on Mondays, but again, we kinda have a special occasion today. There's a long-standing tradition to give presents on one's birthday. You can give CatOps a little birthday present by donating for FPV drones for Territorial Defense of Mykolaiv.

Each 20k UAH is a single drone, so let's see how many we can get! You can donate via this Monobank jar:

https://send.monobank.ua/jar/3u6w8ar23z

to this card directly: 5375 4112 1759 7652

#catops #birthday #donations #Ukraine

CatOps

19 May 2024 10:26

There are discounts on Linux Foundation’s courses again.

So, if you want to get certified, it might be a good chance now!

#courses

CatOps

15 May 2024 09:03

Some say that 2024 will finally be a year of serverlessless /s

So, here’s a comparison from Ahrefs of their costs of running physical data centers vs running in a cloud.

However, many these comparisons lack an important point. At least, Ahrefs acknowledges that:

 article doesn’t take into account other aspects that would make the comparison even more complicated. These include people skills, financial controls, cash flow, capacity planning depending on the load type, etc.

CatOps

12 May 2024 15:54

A new issue of the CatOps digest is here, even though it's one week late:

https://newsletter.catops.dev/p/catops-digest-2024-05-12

#digest #newsletter

CatOps

08 May 2024 13:05

The biggest problem in software engineering is distractions.

This is what this article is about. So, I have distracted myself to read it and now I'm distracting you with this post.

Enjoy!

#culture

CatOps

06 May 2024 14:08

​​A friend of mine is raising funds for an FPV complex for his brother that works as an instructor in the Foreign Legion.

Monobank Jar:
https://send.monobank.ua/jar/2P9ANBRRp4

Card number: 5375411213105070

The goal is 125k UAH and we're almost there.

You can find more info about this fundraiser (in Ukrainian) via these links:

- https://www.instagram.com/reel/C6eCeExtr9B/?igsh=MXM2aHJ4NTc3ejB6eQ==
- https://www.facebook.com/share/v/BvQUapoc2j7jyr3E/?

CatOps

17 Jun 2024 18:26

For today's Donations Monday, I would like to share with you a fundraiser by Come Back Alive and PrivatBank for the establishment of the "Yatagan" UAV school.

The goal is to raise 33M UAH and currently about 21.5M are raised. It's also possible to donate using a European bank card - I've just checked that ;)

#donations #Ukraine

CatOps

13 Jun 2024 09:52

More conference videos for you!

As you sure know, if you're following this channel, we had a DevOps Days Ukraine conference recently.

Talks are already available on YouTube! Enjoy!

#slides #conference

CatOps

11 Jun 2024 10:17

A new late issue of the CatOps Newsletter is out!

https://newsletter.catops.dev/p/catops-digest-2024-06-09

I'll try to get back to the bi-weekly schedule with newsletters coming on Sundays, but no promises for the Summer.

#digest#newsletter

CatOps

08 Jun 2024 16:38

​​For those of you who like meddling with their terminal emulators - Oh My Posh is a command line prompt that can replace p10k, since the latter one is no longer actively maintained.

Here’s a video where it’s shown in action (and basically this is how I discovered it):

https://youtu.be/9U8LCjuQzdc?si=ho-67Xuht02Ql0kT

What I personally liked from the video is a possibility of creating a neat config in YAML or TOML and ease of replacing current config with another one right in the shell configuration file.

I’ll definitely give it a try when I have some time.

#terminal #tools

CatOps

06 Jun 2024 19:28

A case study from Grammarly on their migration from Graphite to VictoriaMetrics, which helped them to improve DevEx as well as save money.

Unfortunately, there are not many technical details in this article, but I still want to share it, ‘coz I’ve rarely seen posts about VictoriaMetrics in production. So, maybe you are the one who can write something on the matter?

P.S. Do you, folks, even remember Graphite?

#observability

CatOps

03 Jun 2024 13:49

Together with GeekOps and Brokee we are starting a fundraiser for reconnaissance units that work on the Sumy direction.

We are raising funds for Starlinks and electronic warfare equipment for communication and protection against enemy's drones.

The goal is: 95 000 UAH.

You can donate on the Monobank Jar:
https://send.monobank.ua/jar/3D2HEywrZ5

Or to the card directly:

4149 4998 0815 3090


Crypto wallets are also available:
USDT trc 20: TCGcEu5eUWFN8niDvrVUSPPtLWosKj61Gu
USDT erc 20: 0x9e7f1d08f71f0d228c6f7f14e1b0192ec964566b
BTC: 3NktSaKQB8Wwv4txaZTKeZ3EUQs5y9dJ2U

#donations #Ukraine

CatOps

31 May 2024 13:36

A month ago I had a talk about Renovate after 1 year of its use (in Ukrainian)

Recording - https://youtu.be/zePUpFGWbFM
Slides - https://tinyurl.com/gen-renovate

#slides

CatOps

29 May 2024 19:06

Yet another DevOps books bundle by Packt.

I’m not familiar with many of these books, so I cannot vouch for any of them, but this bundle is also cheaper compared to those from O’Reilly.

#books

CatOps

23 May 2024 11:37

Another book bundle for y’all!

This time it specifically focuses on DevOps.

One of the books there - “How Linux Works” was a book I used to learn Linux back in a day. I have been always recommending it and I cannot recommend it more.

So yeah, that’s a good bundle. I would buy it just for that one book. However, there are some other great books as well.

#books

CatOps

21 May 2024 15:37

As you may have already heard, there's a new joint fundraiser by the Comeback Alive foundation and DOU.ua.

The goal is to raise 50M UAH for equipment for the 95th Assault Brigade. They also have a raffle for a car among those who has donated between 18th of May and 24th of August. So, I dunno, maybe you also need a car.

#donations #Ukraine

CatOps

17 May 2024 14:42

We are all aware of questinos like: "What happens when you type google.com in a browser?" or "What happens when you do kubectl apply?", but do you know What Happens on GitLab When You do git push?

#gitlab #git #cicd

CatOps

13 May 2024 12:42

​​Dzyga's Paw foundation raises money for anti-drone systems, which are crucially important for our defenders.

You can read more about this fundraiser here.

The goal is $30 000.

#donations #Ukraine

CatOps

09 May 2024 13:39

This may not classify as a technical post per-se, but apparently you can run amplification attacks using Mastodon - a popular open-source decentralized social network.

The idea is very simple: when you post a link, it will try to fetch a preview. Since this is a decentralized platform, each federated node will try to fetch assets on its own.

And this issue just exists. Frankly, I don’t think the mitigation is any different from a generic DDoS protection. It’s just an interesting fact about federated social networks.

P.S. Now, I wonder if Blue Sky has this problem as well.

#security

CatOps

07 May 2024 15:51

Go is super popular in platform engineering. Just recently I participated in a discussion about it on Reddit :D

And at last, HumbleBundle has a book collection dedicated to this language!

#go #programming #books

CatOps

03 May 2024 08:17

https://itnext.io/benchmark-results-of-kubernetes-network-plugins-cni-over-40gbit-s-network-2024-156f085a5e4e