Getting started with Packer in 2024
Getting started with Packer in 2024 Photo by Marek Okon on Unsplash TL;DR Looking to build Ubuntu image for qemu on Fedora or Macos check my solution in my repo...
Make an alias for existing branch
Make an alias for existing branch Photo by Mohammad Rahmani on Unsplash If you happened to miss the master branch and your organization uses the more populistic main naming convention...
Converting Panics to Errors in Go Applications
Converting Panics to Errors in Go Applications Foto von Anton Darius auf Unsplash Golang is a popular language that makes it easy for beginners to start writing concurrent applications. Often,...
Unlocking Performance: Installing Ruby with YJIT on MacOS
Unlocking Performance: Installing Ruby with YJIT on MacOS Foto von Joshua Fuller auf Unsplash YJIT, the groundbreaking Just-In-Time compiler for Ruby, brings a significant performance boost to your applications. However,...
What is an Incident?
What is an Incident? Understanding Incidents An incident is an unforeseen event that disrupts regular operations, demanding immediate attention to minimize its impact and restore normalcy. While definitions may slightly...
MTTx Metrics-Based Incident Response Optimization
MTTx Metrics-Based Incident Response Optimization Introduction Incident response is a critical aspect of every organization’s strategy. To ensure continuous improvement and optimization, it is essential to measure and analyze key...
Reliability concepts: Availability, Resiliency, Robustness, Fault-Tolerance, and Reliability
Reliability concepts: Availability, Resiliency, Robustness, Fault-Tolerance, and Reliability I came across a comprehensive list of essential topics related to Site Reliability Engineering (SRE), particularly emphasizing the aspect of Reliability. You...
Getting Started with OBS: A Beginner's Guide
Getting Started with OBS: A Beginner’s Guide Foto von Malte Helmhold auf Unsplash Introduction If you’re a beginner looking to dive into the world of live streaming and content creation,...
Pros and cons of a balcony solar system
Pros and cons of a balcony solar system I have put together some basic information for the house community about a solar power system on a balcony in Berlin, Germany....
Minimalist web server for static files with Crystal
Minimalist web server for static files with Crystal Problem Build a cross-platform web server to serve static files in the local folder. Test local HTML, CSS, and JS files without...
Quick note: Generate flamegraph for Crystal app
Quick note: Generate flamegraph for Crystal app Quick note for me to remember how to generate flamegraphs to profile Crystal lang app. Let’s see how it works… Flamegraph? Flamegraph Memory...
Crystal string and heredoc with escaped characters for JSON
Crystal string and heredoc with escaped characters for JSON TLDR: Clarify a problem why some JSON content could be not parsable via directives and how to fix it require "json"...
Pitfalls of using metaprogramming in Ruby on Rails application
Pitfalls of using metaprogramming in Ruby on Rails application Do you know that metaprogramming is easy to add but hard to support? Developers underestimated risks related to using metaprogramming in...
How to begin with Traces in Crystal
How to begin with Traces in Crystal TL;DR: Primitve two code examples to start working with Traces Kirk Haines³ recently started working on making opentelemetry available for Crystal applications¹. I...
Crystal detects Emoji symbols in String
Crystal detects Emoji symbols in String Problem is to identify unicode characters that has different byte size, but single symbol in render. Such of the symbols Emoji. subject = "🇺🇦...
Dockerfile for a Crystal application
Dockerfile for a Crystal application Build a space-effective docker image for a Crystal application TL;DR: Build an application with static linking and use Alpine base image to reduce the size...
Medup backups articles
Medup backups articles TL;DR Explain features of medup client tool to export Medium and Dev.to posts I am glad to present you my little project Medup to export Medium and...
Build and Read Crystal
Build and Read Crystal TL;DR Notes how to build crystal programming language from sources Prologue I work on a small client tool written in Crystal. It calls “Medup”. As usual,...
Convert laptop to a router for Telekom.de network
Convert laptop to a router for Telekom.de network Set up a Linux machine as a WiFi router in a few steps. No luck with Mac OS devices. TL;DR I spent...
How to automate building local virtual machines with Packer
How to automate building local virtual machines with Packer We will learn how to create a disk image base on a remote iso disk image. Auto install packages and configure...
Convert Github Issue to Pull request
Convert GitHub Issue to Pull request The typical difficulty for most GitHub users is to manage 2 cards per task (an Issue and a connected Pull request). It consumes a...
Listen to localhost
Listen to localhost How many processes can ‘listen to’ the same port of localhost? I know the answer, and it is ONE port. TL;DR Depends on OS configuration and socket...
Modify binary files with VIM
Modify binary files with VIM TL;DR xxd ./bin/app | vim — and :%!xxd -r > ./bin/new_app When I was a student, I used a lot Windows. It was hard times...
Debug Crystal TCP server
Debug Crystal TCP server Learn how to debug TCP communications with Wireshark In my journey of learning Crystal language, I want to record notes and left guide on how to...
Rotate Kubernetes certificates with Kubeadm v1.11
Rotate Kubernetes certificates with Kubeadm v1.11 After building my first successful immutable cluster, I faced the problem of expired masters’ certificates. I have already mentioned how to generate new certificates...