This article is also available on Substack. This is a very basic example of using Helm Unittestas well as an example of the “test pyramid” discussed in the previous article. The code is available on GitHub. Structure We have two charts: fw-demo - a chart with our demo application monitoring - a library chart that applies some DataDog monitoring rules for the main chart. monitoring chart is a dependency. The main Chart....
This article is also available on Substack. Before answering this question, we should decide why to test Helm chart? and if you even need to bother with that. Following an example from this xkcd comic, the real answer is: it depends. So, I want to share with you my story of Helm chart testing. How and, more importantly, why it started, and how it played out in the end. On a side note, I did a talk on this topic at the DevOps FW Days conference....
This is the first guest article in this blog. This is one is by Maksym Vlasov - my co-author of the CatOps channel. Pre-history As you may know, Terraform 1.4.0 has introduced changes, which break the previous unintentional behavior. Previously, you could ignore the lockfile and use cached providers as long as the version constraints in the code were okay with your local cache. Starting from 1.4.0, Terraform always checks the lockfile before going into your cache directory....
Annual Kubernetes Survey by CatOps It is the second time I run this survey. You can find the previous year’s results here. You can find the raw data in the Google Sheets. You can also read this article on Substack. Introduction This year, I ran this survey for two months: from the 14th of March to the 18th of May, and gathered 122 responses in total. Yet, I must admit that I only promoted this survey for a month....
Building a CLI application in Go: Part 0 Intro I have written a tiny CLI app that can update the storage class of objects in an AWS S3 Bucket. To be completely honest, this tool is rather useless in the wild. You can achieve the same results natively with AWS S3 Lifecycle policies. However, this app is my opportunity to talk about writing CLI applications in Go as well as speculate about pet projects in general....
Kubernetes Survey Results Not so long ago, I created a survey to understand how people manage their Kubernetes clusters. I got more than a hundred responses from Telegram, Reddit, Twitter, and DOU, 102 to be precise. Now, I am ready to share it with you! You can find all the raw data via this link. This text is also available in Ukrainian. A backstory (skippable content) After, I wrote the article about Kubernetes backups - Why backup Kubernetes?...
This is the second part of a series of articles regarding Kubernetes backups. You can find the first part about Velero tool here. Why Backup Kubernetes? In the previous part I provided a brief overview of the backup & restore tool for Kubernetes called Velero. Now, I would like to talk, why backup your cluster at all? What makes a cluster? A typical production cluster has a three-layer structure. There are Kubernetes components themselves....
Blog Redesign I have redesigned my blog recently. Well, not really redesigned, rather applied a Hugo theme, that I liked the most. This is how it was before: And this is how it looks now: Why so? Supporting a theme is hard. I’m not a web developer. I have some idea about CSS and I can use a bunch of examples on the Web to create something on my own, but it takes a lot of effort....
I briefly mentioned this issue in a podcast recently. So, if you understand Russian, you’re welcome to listen to it. However, after I heard the news that Apache Mesos is going to be moved to Attic, I decided to write this post. Here I want to wrap up my thoughts and opinions on what’s going on on the infrastructure management scene recently and how we ended up like this. And also why I believe that things like Nomad and ECS are not quite a competition to Kubernetes nowadays....
[Somewhat Long] Intro If you have a lot of Zoom calls, which is something very common these days, you need to have a good sound. Believe me. Even if you only talk to your colleagues at occasional business meetings. At the beginning of the WFH era, I thought that getting a good webcam is more important. And it looks like a lot of people share that feeling. At least, it’s still hard to buy a Logitech webcam on the market....