CatOps

The second practical part of the Helm charts testing article. - Read in the blog - Read on Substack #kubernetes #helm #testing

At last! I converted my talk from FW Days DevOps 2024 into an article in English. You can find it in my blog or on Substack. This is the Part I which goes through the ideas behind the testing of Helm charts. But have no fear! I learn on my previous mistakes, so the second part that walks you through the technical aspects of tests is also ready and will be published tomorrow! Also, you can still watch the video of my talk on the FW Days conference (in Ukrainian). It has basically the same content as the articles. Enjoy! #kubernetes #helm #testing

How Wise reduced AWS RDS maintenance downtimes from 10 minutes to 100 milliseconds is an interesting story for those who do DB operations. From time to time, it's necessary to apply changes that require downtime. However, it's unacceptable to have long "maintenance windows" nowadays. So, one has to be creative. #dba #mariadb

Convert your rage into donations. Together with UkrOps Digest we are still raising funds for the Skelyar platoon. These funds will be spent on the equipment for UAV. Right now, we have 1/3 or the required sum. 🎯Goal: 150 000.00 ₴ 🔗Monobank Jar https://send.monobank.ua/jar/6k2H9iu8tN 💳 Direct card number 5375411219683781 #donations #Ukraine

A new issue of the CatOps Digest is here! https://newsletter.catops.dev/p/catops-digest-2024-07-07 #newsletter #digest

Today's Friday, so we can talk about some more relaxed topics. Your Company's Problem is Hiding in Plain Sight - High Work-In-Progress (WIP) is a good reminder that working on everything everywhere all-at-once is a bad idea. I'd like to bring up this topic, because I think this issue is even more prevalent in platform teams. What I missed in this article is some advices on how to address the issue in a controlled fashion: how to properly calculate it and "sell" to the management. Still, you can get some ideas from the discussion on Reddit. So, as a bonus, I'd also like to share these two articles: - One is on the Little's Law - The second one is on the cost of context switching P.S. I'm in that age when I really regret slacking out at the Queuing Theory lectures in the university :\ #culture

In case you missed it somehow. regreSSHion: Remote Unauthenticated Code Execution Vulnerability in OpenSSH server A newly discovered vulnerability allows a malicious actor to execute code remotely with the highest privileges on a host. CVE assigned to this vulnerability is CVE-2024-6387. Glibc-based Linux systems are affescted. Affected OpenSSH versions: - OpenSSH versions earlier than 4.4p1 are vulnerable to this signal handler race condition unless they are patched for CVE-2006-5051 and CVE-2008-4109. - Versions from 4.4p1 up to, but not including, 8.5p1 are not vulnerable due to a transformative patch for CVE-2006-5051, which made a previously unsafe function secure. - The vulnerability resurfaces in versions from 8.5p1 up to, but not including, 9.8p1 due to the accidental removal of a critical component in a function. OpenBSD systems are unaffected by this bug, as OpenBSD developed a secure mechanism in 2001 that prevents this vulnerability. Here's another interesting fact: "In our security analysis, we identified that this vulnerability is a regression of the previously patched vulnerability CVE-2006-5051, which was reported in 2006." This is why you always need to have several lines of defense in your systems. Also, since I got into the industry, it was always advised not to open SSH to the world and hide it behind a VPN or such. This advice still stands. Moreover, today you have solutions in place that allow you avoiding SSH at all. #security #ssh

A reasonable article on how to provide meaningful feedback. Specifically, on how not to be afraid to provide meaningful feedback. You may already know many of these points, but it won't hurt to re-read them. Also, this is one of the cases where actual practice weights more than theory. P.S. The original article seems to be behind a paywall, but I was able to read it just fine via Pocket. In any case, here are the tl;dr points provided by the author himself: Way before giving feedback… - Build a relationship with the other person - This starts the path of giving feedback to someone like it’s your close friend. Good relationship = easy feedback. - Share that you are open to receiving feedback - This results in the other person seeing you are growth-minded and often leads to them asking for feedback too. - Give positive feedback first - This helps build a positive relationship and ensures the other person knows you are on their side and looking out for them. When you do need to give feedback, follow the feedback process… - Look inward first. Know your intent - Ensure you are sharing the feedback for the right reason. Not to vent, but to help the other person. - Get permission - When in doubt, confirm with the other person. This allows them to opt in and prevents backlash. - Show you care - The most important step. Let them know the reason you are sharing is because you care. - State your observations - Stick to the facts of the situation. These should hardly be debatable. Call out the common problem. - Explain the impact - Help the other person understand why it matters. Is it impacting you, others, or the business? - Get their thoughts - You’re solving a problem together. Get their take on it. - Align on next steps - Ensure it’s clear what to do moving forward. #culture #feedback

​​Sup! Together with UkrOps Digest we are raising funds for the UAV equipment for the Skelyar platoon of the Rubizh brigade. Specifically, we are raising money for: - Antenas - Batteries - Controller unit - 2 sets of cables The end goal is 150k UAH. There is also a raffle: 1. Our defenders will sign two platoon banners. Each 300 UAH donation is a chance to win one. So, if you donate 300UAH, you get one "ticket", 600 UAH - 2 "tickets", and so on. 2. Those with top 5 highest donations will have a chance to write a message on a drone! Vsevolod Polyakov - the author of UkrOps Digest - knows these guys personally, thus I can vouch for them as well. 🎯Goal: 150 000.00 ₴ 🔗Monobank Jar https://send.monobank.ua/jar/6k2H9iu8tN 💳 Direct card number 5375 4112 1968 3781 Many thanks to y'all! #donations #Ukraine

Ruby was the first programming language I tried to consciously learn. Meaning, it wasn't a part of a university curriculum or something. Despite not using it for many years, I still have some warm feelings towards this language. In this article Lucas Seiki Oshiro argues that Ruby is good for shell scripts as well. Ruby is strongly associated with the Rails framework. So, I think this article is a good reminder that programming languages are more than just frameworks. #programming #ruby