TIL - Terraform refactor resources without recreation
Today I learned that since v1.1, you can move Terraform resources into modules without recreation using moved block. Refactoring doc covers such use cases as...
Posts by Category
- TIL 23
- certifications 18
- vim 13
- kubernetes 9
- blog 5
- terraform 4
- truenas 4
- books 2
- tools 2
- fish 2
- Terraform 2
- AWS 2
- nix 2
- wsl 1
- typing 1
- monitoring 1
- azure 1
- Kubernetes 1
- webinar 1
TIL
TIL - Kubectl integrated Kustomize
Today I learned that since 1.14, ‘kubectl’ has Kustomize integrated in it:
TIL - Adding maps to Github markdown files/blog posts
Today I learned that you can embed maps in geoJSON and topoJSON format into your markdown files.
TIL - Keda and DataDog don’t work together
Today I learned that Keda and DataDog don’t work together. I was trying to implement automatic scaling based on the AWS SQS Queue.
TIL - Neovim automatic highlighting references with LSP
Today I learned a pretty cool LSP feature - automatic highlighting of references for the current text position:
TIL - Neovim lsp uses tag stack
When you use Neovim LSP functions like vim.lsp.buf.definition() or vim.lsp.buf.implementation(), your cursor jumps to the corresponding position. Your previo...
TIL - Adding mp4 mov to Github markdown files/blog posts
In the beginning of 2021, Nat Friedman announced that Video files that you drop onto markdown files are now automatically embedded!
TIL - Conventional Commits
In my daily work, I try to use sane commits messages.
TIL - Kubernetes slow PV mount
During my investigation of Pods taking a long time to start (20+ minutes) I saw following message in Pod’s logs:
TIL - Helm chart-testing custom values
Testing your changes to the Helm chart is a must if you want to minimize the risk of failure. There are a set of techniques, which you may use to validate yo...
TIL - Helm respect current replicas
When you upgrade deployed Helm chart, you probably have replicas defined in values or pass it through set.
TIL - Learning github script
If you’re managing a lot of GitHub repositories you’re probably using GitHub Actions. One extremely powerful action is github-script. Using this script you ...
Restarting GitHub action from CLI
GitHub Actions is still pretty new and missing a lot of functionality. One of such missing features was the ability to interact with Actions from the command...
TIL - Commenting current command in shell
Today I discovered that command, which you are typing in shell(fish or bash) can be quickly commented via ALT-SHIFT-3 key mapping.
TIL - Building Docker Images remotely in ACR
Today I’ve learned that Azure Container Registry can build Docker images for you. Using az cli you’re sending Dockerfile and contents of folder you’re trying...
TIL - Retrieving Jenkins secrets
I’m a long-time Jenkins user. And I always thought that it’s only possible to get secrets via some kind of expose from runner.
TIL - Neovim automatically wrapping long lines
While editing markdown files, I try to make them nicely formatted. For me, 80 characters is a good line length. Wrapping text can be boring, especially on al...
TIL - Free wildcard domain xip.io
Sometimes you need to test your application quickly, and setting up new DNS domain, especially in Enterprise, can take ages. Today I learned about xip.io, a ...
TIL - Neovim Highlight yanked text
I have a bad habit of visually selecting text in (neo)vim before yanking it. I know that it’s not efficient and always wanted to get rid of this habit.
TIL - Firefox clear recent history
Today I learned super useful shortcut in Firefox to quickly access Clear Recent History menu.
TIL - Pasting into Teams
We are using Microsoft Teams as our main collaboration tool. It was really killing me, when I select and copy text from Terminal, paste it into Teams chat an...
TIL - Makefiles advanced usage
I’m a long time user of Makefiles.
TIL - Validating Jenkins Pipeline from CLI
During last couple of days I’ve been developing Jenkins CI and CD pipelines. Since I’m get used to Python’s linting tools like flake8 workflow where you have...
certifications
GitOps Certified for Argo II
I’ve passed the course GitOps at Scale and follow up exam:
Passed a few free Kubernetes Certifications
I’ve passed some free courses and corresponding certifications, which I find pretty useful.
GitOps Certified for Argo
I’ve passed the course GitOps Fundamentals and follow up exam:
Passed Certified Kubernetes Security Exam
I’ve passed Certified Kubernetes Security Specialist Exam with score 84%: This also means that now I obtain all three Kubernetes Certifications from LinuxFo...
CKS preparation - abusing ServiceAccount to grant privileges
In this article I will show how Kubernetes ServiceAccount can used to gain privileges. Of course, all this information should be only used for preparation to...
CKS preparation - RBAC apiGroups
During my CKS preparations, I’ve faced with one not obvious thing - selection apiGroups in RBAC rules.
CKS preparation - setting up gVisor
One of the topics for the Certifies Kubernetes Security Exam(CKS) is usage of gVisor as container runtime. While in theory configuring gVisor shouldn’t be ha...
My attempt on Certified Kubernetes Security beta Exam
As a Senior Engineer at EPAM who works with Kubernetes on a daily basis I was invited to take CKS beta exam. I didn’t have time to prepare for the exam and, ...
Passed RedHat PE180 exam
I have successfully passed Red Hat PE180 and earn Red Hat Certified Specialist in Containers for Kubernetes. In this post I will share my experience about mo...
Rancher Certified Operator
I’ve passed the course Certified Rancher Operator: Level 1 and follow up exam:
CKAD theory pt.7 - State persistence
This is part 7, last one of my personal notes I’ve written during preparation to CKAD. State persistence
CKAD theory pt.6 - Service Networking
This is part 6 of my personal notes I’ve written during preparation to CKAD.
CKAD theory pt.5 - Observability
This is part 5 of my personal notes I’ve written during preparation to CKAD.
CKAD theory pt.4 - Observability
This is part 4 of my personal notes I’ve written during preparation to CKAD.
CKAD theory pt.3 - Multi Container Pods
This is part 3 of my personal notes I’ve written during preparation to CKAD.
CKAD theory pt.2 - Configuration
This is part 2 of my personal notes I’ve written during preparation to CKAD.
CKAD theory pt.1 - Core Concepts
I thought that I could publish my CKA/CKAD preparation notes, maybe it will be useful for someone. Mostly it’s a compilation of already existing articles, bu...
Preparation for CKA/CKA
I’m constantly being asked, which resources I’ve used to prepare to CKA/CKAD exams.
vim
Switching from nil to nixd Language Server for Better Nix Development Experience
I was using nil language server for a while, and it was working fine.
Validating Gitlab CI in Neovim
I really enjoyed using nvim-jenkinsfile-linter when I was writing Jenkinsfiles. Simple yet useful, this plugin helped to speed up writing Jenkins pipelines a...
Vim numbered lists
When writing markdown, it’s super common that you need numbered lists. (Neo)Vim has built-in support which makes creating numbered lists like a breeze.
Neovim opening GitHub repos URLs
I have a very useful mapping in my Neovim: gx, which opens the URL under the cursor in the browser. I even wrote a blog post on it: Neovim Opening URLs
Signing Git commits in NeoVim
While all commits to GitHub through the web interface are automatically signed, you have to do some configuration to make it work in the console.
Improving work with Terraform in Neovim
Working with Terraform on a daily basis and using Neovim as my main and only editor, I recently figured out a few improvements, which I’ll share in this blog...
Neovim enhancing completion with TabNine
While everyone is hyped about GitHub’s Copilot, I’ve discovered TabNine, an AI completion that I enjoy a lot.
Neovim setting up snippets with luasnip
I’ve wanted to start using snippets for a while, but never actually invest time into figuring out how snippets work. The idea to expand blocks of text/code j...
Neovim Telescope Github plugin
As an active user and developer of Github Actions, I spend a lot of time watching how the run goes on and reviewing logs of unsuccessful runs.
Vim my favourite keymapping
I don’t think that there is a single person who likes Vim’s Ex mode. And keymapping used to trigger this shortcut, Q regularly gets occasionally triggered.
Neovim writing LUA plugins
Recently the Neovim community has been experiencing a boom in new plugins. Those plugins are written in LUA, which is much, much more pleasant to write than ...
Neovim opening URLs
Vim has built-in functionality to open URLs directly by executing gx in normal mode. This functionality is provided by netrw plugin :h netrw-gx
Neovim train motions
I’ve found very interesting but little known neovim plugin, train.nvim. It’s readme is pretty confusing, so I’ll describe it here.
kubernetes
Running testcontainers in Kubernetes with KubeDock
Testcontainers is great framework for replacing complicated mocks in tests with the real dependencies like databases, message queues, etc.. in containers.
Monitoring Calico with kube-stack-prometheus
Monitoring of each Kubernetes component is very important, and Calico is not exception. Today I learned that Calico provides capabilities to export Prometheu...
Becoming Packt’s technical reviewer
I’ve became a technical reviewer for the book Kubernetes – An Enterprise Guide - Second Edition
Participating in Digital Ocean Kubernetes Challenge
When I saw that Digital Ocean @digitalocean is organizing a Kubernetes Challenge I decided that I’ll participate.
Kubernetes debug autoscaler issues
To understand what’s going on on the market, it’s useful to apply to open positions from time to time.
Comparing Enterprise vs Community MongoDB K8S Operators
Recently I was evaluating MongoDB Kubernetes operators, as one possible way to migrate On-Prem MongoDB servers. I weren’t able to find any comparison, so I h...
Using fzf with kubectl as REPL
I was pretty impressed by the article fzf-live-repl and decide to adapt these techniques in my daily work with Kubernetes.
Kubernetes rewrites
As I work with nginx Ingress and rewrite rules on a daily basis, I spend a good amount of time working with them. So I’ve decided to summarize my knowledge i...
Mounting ConfigMap as single file
Many guys who work with Kubernetes don’t know that you can mount ConfigMap into existing folder inside a Pod as a single file.
blog
Two years to the blog
Today marks two years of this blog. I wrote my first post on this blog on 2020.04.15. For two years, I wrote 73 posts, some of which become popular.
Fedora 32 and github pages
Last week I’ve updated my working machine to Fedora 32. Upgrade went smoothly and, after a week, I thought that I wouldn’t face any issues.
Linkedin location and HR activity
Couple weeks ago I had a discussion on HR’s activity in LinkedIn and location in your profile there.
Adding blog to search engines.
I’ve added blog to Google and Yandex search engines. This was by no mean an easy task. I’ve went throught following steps: Add Google Analytics to blog ...
Initial post
I’ve always wanted to start a blog, and finally I had some time to investigate github pages and create this awesome blog. We’ll see if I’ll have enought time...
terraform
TIL - Terraform refactor resources without recreation
Today I learned that since v1.1, you can move Terraform resources into modules without recreation using moved block. Refactoring doc covers such use cases as...
Github actions cancelled terraform jobs
Today I’ve faced small but nasty bug in my Terraform solution. You can read about solution in Terraform vs Github Actions and Github actions matrix secrets a...
Github actions matrix secrets
My team is continuing migration to GitHub Actions, and one of the pipelines we are working on is Terraform validation pipeline. I’ve described this pipeline ...
Terraform vs Github Actions
My project is migrating to github, and one of team intentions was to use github actions instead of Jenkins.
truenas
Truenas Scale UPS reporting
I continue my adventures with TrueNas Scale. After configuring UPS I wanted to see the UPS graphs on the reporting page, but they were empty.
Truenas Scale monitoring Huawei UPS2000G
To protect my TrueNas Scale installation from power outage, I bought a UPS. I had a good deal on Huawei UPS2000G, and considering that it’s an online UPS it ...
Truenas Scale configure kubectl k9s
TrueNas Scale uses k3s, which is a lightweight Kubernetes distribution. It’s intended to be used only as platform for APPS, but I don’t see why you can’t use...
Truenas scale install fish
Recently I bought a server that I will be using as NAS/HomeLab. My OS of choice for this server is TrueNas Scale.
books
Book - The Complete Software Developers Career Guide
Finished reading “The Complete Software Developers Career Guide” by John Sonmez.
Book - Harry Potter and the Methods of Rationality
Just finished reading “Harry Potter and the Methods of Rationality”. This is by far the best funfic I’ve ever read.
tools
Kubectl plugin manager
I’ve been aware that there is such thing as kubectl plugin manager - krew. But plugins available didn’t make much sense for me, at least until now.
Setting up FZF on Fedora
I’m using fzf for fuzzy finding in vim, and I am very happy with it. But for bash in Fedora it was a frustrating experience. Shortcuts weren’t working, bash ...
fish
Git fzf wrappers for fish
I was reading through the list of changes of new fzf version and, as it sometimes happened, found myself in a different place.
Switch to fish shell
I had some free time and decide that I should try different shell, specifically fish. I wanted to try it for a long time, but just wasn’t convinced that time...
Terraform
Passing Custom Data to Terraform Azure RM Compute Module
If you use Azure RM Compute Module from Terraform Registry you were probably thinking of ways to configure VM during provisioning. And there’s a bunch of, on...
Terraform and Azure CosmosDB
Recently I was creating Terraform IaaC solution for Azure CosmosDB. First step was to find if there is en exising terraform module, which I could use for our...
AWS
Implementing Calico CNI on existing cluster
In one of our production clusters, we’ve faced the issue of depleting the IP addresses, due to how ENI assigns and reserves IP addresses. You can check out E...
TIL - Keda and DataDog don’t work together
Today I learned that Keda and DataDog don’t work together. I was trying to implement automatic scaling based on the AWS SQS Queue.
nix
Fingerprint Authentication with fprintd on NixOS
Introduction
Nix Colemak-DH layout
NixOs is gaining a lot of attentions right now. I’ve also decided to try to use is as my daily driver. I won’t go into the details of installation of nixos, ...
wsl
WSL2/VM TLS Handhake failed
Recently I was very annoyed by random TLS errors, for example:
typing
Switch to Colemak
It’s been a week since I entirely switched my keyboard layout to Colemak-DH. If you have never heard of it, it’s an alternative to QWERTY 12 finger keys move...
monitoring
Monitoring GitHub Rate limits
If you’re an active user of GitHub API, pretty soon you’ll reach your account’s rate limit - 5000 requests per hour for authenticated user.
azure
Using ArgoCD with Azure ACR
If you want to feel the taste of the GitOps approach one of the best tools on the market at the moment is ArgoCD. It has all the features you’d like to see f...
Kubernetes
TIL - Kubectl integrated Kustomize
Today I learned that since 1.14, ‘kubectl’ has Kustomize integrated in it:
webinar
Testing Infrastructure as Code: How to Solve The Common Challenges
If you’re interested in Testing Infrastructure as Code, join me Feb 27 2023, 1:00pm with the