CatOps

01 Nov 2023 09:58

AWS Karpenter is in beta now.

Karpenter is AWS’ tool to manage and autoscale node pools in Kubernetes, which has more features compared to the Cluster Autoscaler and has deeper integration with AWS features. Yet, support for other major clouds is somewhere in the roadmap, IIRC.

This article in particular, describes what are the changes in Karpenter Beta compared to the previous versions and also guides you through depreciations and upgrade notes.

#kubernetes #aws

CatOps

29 Oct 2023 13:32

A new issue of the CatOps Digest is here!

#digest

CatOps

26 Oct 2023 13:33

An interesting insight into Facebook's internal architecture. Basically, because of their size they could create a vast serverless platform for internal use that handles trillions of requests.

This article is a summary of a whitepaper published earlier. You can find this whitepaper in PDF format here. I haven't read it yet, though.

#serverless

CatOps

23 Oct 2023 13:22

​​For today's Donations Monday, I'd like to remind you about the Protect the Sky fundraiser by Come Back Alive and Nova Posta.

This is a very important fundraiser that helps Ukrainian Air Defence units.

#donations #Ukraine

CatOps

20 Oct 2023 12:12

The latest episode of our voice chat (in Ukrainian) is now available!

We spoke about documentation: where to store it, how to write it and how to make people read it.

You can find it on:

- YouTube
- Substack
- Spotify
- Apple Podcasts
- Google Podcasts

Enjoy!

#voice #говорилка

CatOps

17 Oct 2023 13:31

Today, I'd like to share with you a series of articles that I currently read. It's called "Let's code a TCP/IP stack" and it provides a very nice insight into the Linux networking stack. I'm still going through all the articles but I'm sharing all of them here:

1. Let's code a TCP/IP stack, 1: Ethernet & ARP
2. Let's code a TCP/IP stack, 2: IPv4 & ICMPv4
3. Let's code a TCP/IP stack, 3: TCP Basics & Handshake
4. Let's code a TCP/IP stack, 4: TCP Data Flow & Socket API
5. Let's code a TCP/IP stack, 5: TCP Retransmission

#networking

CatOps

16 Oct 2023 14:14

Today I just want to remind you about this fundraiser

CatOps

12 Oct 2023 11:50

For a bit longer than a week you can buy the Python Crash Course book from Humble Bundle with 45% discount.

I personally don’t use Python, but I know that it’s pretty popular in platform engineering. So, this offer may be interesting to you.

#books #programming #python hon

CatOps

10 Oct 2023 09:00

Let’s continue with Serverless. I Reviewed 1,000s of Opinions on Serverless is a collection of takes on Serverless. The author has collected and analyzed opinions on Serverless from Twitter (RIP), Reddit, Hackernews, ans other websites and broke them down into 3 categories: negative, positive, and neutral.

Tl;dr: as always, it depends. Serverless is no silver bullet. You have to architect your applications from ground up and choose tools fit for purpose - not jump on hype trains.

In any case though, there are some good comments about Lambdas and stuff in this article.

#serverless

CatOps

04 Oct 2023 10:20

The Guardian tells a story of their migration into AWS Aurora Serverless.

This article doesn’t go too deep into technical aspects, but provides a nice overview of the issues one may encounter when trying to move to Aurora.

A couple of things that I found interesting:

- Whatever cloud migration tools are there, pg_dump and pg_restore are your trusted friends.

- This paragraph:


We’re spending roughly $220/month for storage and compute for the database. For the same price we could have rented a db.m7g.xlarge (16GB RAM, 4 vCPUs) Postgres instance along with 100GB of EBS storage or a db.r7g.large (16GB RAM, 2 vCPUs) Aurora instance. I suspect both of these options would have done the job for us, and maybe not have suffered from the same cold start problems as our serverless database, but after 3 migrations, it’s probably time to get back to doing some feature work!


#databases #postgres #aws

CatOps

02 Oct 2023 11:44

​​The beginning a month is the time when you topically get charged for your subscriptions.

So, I am once again asking you to enroll in a monthly subscription to the Come Back Alive foundation.

#donations #Ukraine

CatOps

29 Sep 2023 13:22

Death by a thousand microservices.

You can consider it to be yet another “old tech guy yells at cloud” article, but it has ratio in it.

Yet, I wouldn’t say that we have to throw away the whole idea of distributed systems. Distributed systems is the reason why I still have a job!

So, I would rather read this piece as a “memento mori” article, a reminder that we have to take things in moderation.

For example, there’s an idea of having a “trunk” monolith supported by a handful of additional smaller services. I know a company that does just that and you know what? They’re fine!

#friday #culture

CatOps

25 Sep 2023 14:41

​​For today’s Donations Monday I would like to remind you about Pavlo and Naya, who raise funds for AFU since the start of the full-scale invasion. Their this week’s goal is 310974 UAH .

- Pavlo’s requisites
- Naya’s requisites

#donations #Ukraine

CatOps

23 Sep 2023 10:55

If you want to know what an IDP (Internal Developer Portal) is, but at this point you are too afraid to ask; this article is for you!

It goes through some core features of an IDP and describes why those exist and how can one benefit from them.

Yes, I must admit that this is a marketing article and eventually they will try to sell you their service. However, you don’t have to buy anything to read it!

#idp

CatOps

18 Sep 2023 12:55

​​"Winter is coming" as the House of Stark used to put it.

Yet, we can prepare ourselves. The Come Back Alive foundation together with Nova Posta are running the "Protect the Sky" fundraiser.

The goal is to raise 330M UAH (8,9M USD) for Air Defense and mobile command posts.

About the half of the goal is reached.

#donations #Ukraine

CatOps

30 Oct 2023 16:10

DOU, KOLO та «Шалені Кабани» збирають 5 млн грн на 4 Mini Sharks для «Альфи» СБУ 🦈🔥

БО «Шалені кабани» — ініціатива, яку добре знайома DevOps-спільноті. На літній офлайн-події для девопсів в Києві ми зібрали гроші на мотор для човнів морської піхоти, а пізніше — ще.

До речі, новини про висадку українських морпіхів на лівому березі Херсонщини мають безпосередній стосунок до човників, над якими працюють «Кабани».

Тож, коли ми готували спільний збір, не мали жодного сумніву, що девопси активно підтримають колег та задонатять на 4 Mini Shark для ЦСО «А» СБУ («Альфа»). Адже потрібно зібрати 5 000 000 грн!

Приєднуйтесь! 📌
Лінк для донатів 💵

CatOps

27 Oct 2023 15:25

There’s a new test functionality in Terraform v1.6.0.

You can read more about writing tests for your Terraform projects in this article, which also has examples of the tests.

For someone who values tests for IaC, I’m very glad that such functionality is a part of the core. Although, I haven’t been working much with Terraform lately, implementing tests for Helm charts yielded some great results. I hope to write an article in that one day.

P.S. This article was kindly sent right into my inbox by Terraform Weekly. Do not hesitate to subscribe, you’d like to get the latest news on the most popular IaC tool.

#terraform #hashicorp

CatOps

24 Oct 2023 15:18

Programming Book Bundle by Packt.

I don’t know if you do programming day-to-day. Also, this channel is more OPS oriented, I would say.

However, you may find some interesting stuff there.

#programming #books

CatOps

21 Oct 2023 15:16

A comparison between EKS and AKS.

Tors article provides some insights into what to expect from each managed service. It’s a pity, GKE is not included into this comparison, I’ve heard a lot of good things about GKE. I believe, this is because this article originated from a specific use-case.

#kubernetes #aws #azure

CatOps

18 Oct 2023 13:50

Videos from DevOps Days 2023 are available on YouTube now!

#slides

CatOps

16 Oct 2023 14:14

​​With your help we managed to deliver 18 medical kits to the 27th Separate Bataillon!

We had a new request from them for the winter boots and a thermal vision. We had some money left from the previous fundraiser, so the winter boots are on their way to the frontlines already. Now, we are raising funds for the thermal vision!

The goal is 85k UAH (~2200 EUR). This is the price for the thermal vision, but we still have money left. So, we will “break” the Monobank jar as soon as we have the required amount from all the sources.

Also, we work together with the UA Responders foundation to be clear on all the legal stuff. So, you can also donate to their PayPal or SWIFT, since Monobank sometimes has issues accepting money from the EU cards. Please, put “27” in the message if you donate via PayPal or SWIFT, so we know that these money are meant for the 27th Battalion.

You can find all the requisites via this link: https://quicknote.io/145c93c0-6612-11ee-8acd-1fef365d67eb

Разом переможемо!

#donations

CatOps

15 Oct 2023 16:39

A new issue of the CatOps Digest is here!

Yes, I know that I skipped a week but I kinda had an excuse.

https://open.substack.com/pub/catops/p/catops-digest-2023-10-15

#digest #newsletter

CatOps

11 Oct 2023 10:10

​​I know that y’all want to hear about the cUrl vulnerability. So, here you are: a first hand article from Daniel Stenberg (the author of cUrl) himself.

I haven’t read it yet, tho.

#security #curl

CatOps

09 Oct 2023 16:00

​​With your help we managed to deliver 18 medical kits to the 27th Separate Bataillon!

We had a new request from them for the winter boots and a thermal vision. We had some money left from the previous fundraiser, so the winter boots are on their way to the frontlines already. Now, we are raising funds for the thermal vision!

The goal is 85k UAH (~2200 EUR). This is the price for the thermal vision, but we still have money left. So, we will “break” the Monobank jar as soon as we have the required amount from all the sources.

Also, we work together with the UA Responders foundation to be clear on all the legal stuff. So, you can also donate to their PayPal or SWIFT, since Monobank sometimes has issues accepting money from the EU cards. Please, put “27” in the message if you donate via PayPal or SWIFT, so we know that these money are meant for the 27th Battalion.

You can find all the requisites via this link: https://quicknote.io/145c93c0-6612-11ee-8acd-1fef365d67eb

Разом переможемо!

#donations

CatOps

03 Oct 2023 12:01

Learn from memes is a working strategy!

Therefore, I’d like to share with you this article (quite a long one) that describes a Postgres meme.

So, you could learn its concept broken down by a “level of depths”.

#databases #postgres

CatOps

30 Sep 2023 15:38

A couple of days ago I got together with amazing people to record an episode of the DeadOps Show (in Ukrainian).

Initially we wanted to talk about the hero culture but somehow the conversation slipped into the topic of burnouts.

So here you are. Yet another episode about the thing that never gets old.

#podcast

CatOps

26 Sep 2023 13:43

O’Reilly is being on a streak now!

Right after the Software Architecture book bundle, we’ve got the Cybersecurity Month bundle!

As usual, you can pay different amount of money to unlock different number of books. But still, the whole amount is probably less than the individual price for some of the titles.

#books #humblebundle

CatOps

24 Sep 2023 17:08

A new issue of the CatOps Digest is here!

#digest #newsletter

CatOps

19 Sep 2023 15:07

Some time ago, there was a story of a programmer who held the entire Ukrainian customs service as a hostage, because he was the only one familiar with the obscure codebase (that he has created himself).

Unfortunately, this is not a single case over the industry. When a Programmer Holds the Code Hostage tells a similar story that, frankly, could happen at any company.

What are the takeaways? Appeasement doesn't work. It takes some courage and will from the management to identify and successfully address the situation. There are even some tips on how to do it in the end.

#culture

CatOps

17 Sep 2023 15:57

At last! A new episode of the CatOps Voice chat (in Ukrainian) is here!

This time we spoke about pet-projects as well as marketing of the open source technologies.

As a bonus you can learn what ML and wine have in common 😉

You can listen to this episode on:

- YouTube
- Spotify
- Apple Podcasts (the episode hasn’t appeared there yet for some reason)
- Google Podcasts
- Substack

Enjoy!

#говорилка