How I Shrunk Our Docker Images from 1.2GB to 85MB Using Multi-Stage Builds
How I Shrunk Our Docker Images from 1.2GB to 85MB Using Multi-Stage Builds Last month, a junior dev on my team pushed a Docker image to our registry. …
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Automating Production: A CI/CD Pipeline for Google Cloud Run with GitHub Actions
Introduction In the last guide , we deployed our FastAPI app to Google Cloud Run manually. It worked, but "manual" is a dirty word in modern engineeri…
Docker, From Zero: What It Actually Solves, and How to Actually Use It
Nephew has heard "just Dockerize it" a hundred times at work and nodded along without really knowing what that meant. Uncle sits him down for a proper…
Fix Docker Exit Code 137 (OOMKilled): Why It Happens and How to Stop It
Your container died and docker ps -a shows something like Exited (137) 4 minutes ago . Nine times out of ten that's the kernel's OOM killer, not your …
Linux Kernel Modules That Explain How Podman Really Works
Hi, readers this time I want to show you how to build and run three Linux kernel modules that illustrate core Operating Systems concepts: kernel debug…
4 self-hosting failures that return success
The failures that cost me the most in three years of self-hosting were never the ones that threw an error. An error is a gift: it tells you where to l…
How to Deploy Python Apps with Docker Compose
How to Deploy Python Apps with Docker Compose How to Deploy Python Apps with Docker Compose Stop wrestling with conflicting dependencies and environme…
I teach DevOps. Two weeks later, they can't do it. So we're building the practice layer.
A note from Manabi's founder, Tobi. I teach DevOps for a living: Linux, Git, Docker, CI/CD, Terraform, Kubernetes. I'm good at the teaching part. Here…
From Resetting Passwords to Containerizing Java: My Pivot to DevOps
For 4 years, I lived in the world of IT Operations. My days were spent handling incident response, managing data lifecycles, and making sure systems s…
Docker Volumes vs Bind Mounts: Where Your Data Actually Lives
A container's writable layer feels like a filesystem, and that's exactly the trap. Write a database into it, remove the container, and the data is gon…
Re: --network none is your best friend — here's our full sandbox config + gVisor update
Thanks @custralis for the great feedback on my article about Docker sandboxing ! You're 100% right — --network none alone isn't enough. Here's our act…
Hybrid Container Governance: Scaling Patterns That Work
Hook The third WSL instance didn't need a reinstall. That's when I knew the pattern worked. WSL 1 had the full stack — six ark-* MCP servers, oh-my-mc…
Docker Checks for AWS Config Drift Emails
AWS Config drift emails look simple until you depend on them during a release window. A rule flags a changed security group, EventBridge pushes the ev…
Deploy a Dockerfile on Vercel
Yes, you heard it right, you can now run a Dockerfile on Vercel . Vercel was the go-to place where people went to ship and host their frontend and ser…
The docker-compose port binding that Trivy, Checkov, and Semgrep all miss
Most developers know UFW blocks unwanted traffic. What they don't know is that Docker bypasses UFW entirely by rewriting iptables directly. This in yo…
How I Cut a Docker Image From 1.2GB to 180MB
A while back I inherited a service whose Docker image was 1.2GB. Pulls were slow, the CI cache was useless, and the deploy step took long enough that …
Docker for developers
"Works on my machine" is the most expensive sentence in software. Docker exists to kill it. At its core, Docker packages your application together wit…
From Localhost to AWS ECR: Architecting a 3-Tier Node.js App with Docker.
As a Cloud and DevOps Engineer, one of the most satisfying milestones is taking an application that "works on my machine" and transforming it into a r…
CI/CD Pipelines That Actually Work: My Quest Like a DevOps Jedi
The Quest Begins (The "Why") Look, I still remember the first time I tried to automate a build for a tiny side‑project. I slapped together a shell scr…
Nginx Proxy Manager on Your Home Lab: Performance Tuning Beyond the Defaults
TL;DR: Nginx Proxy Manager ships with one goal: get a reverse proxy with Let's Encrypt certs running in under ten minutes. It delivers on that. 📖 Read…
Deploying SFTPGo as an Azure Storage SFTP Alternative on Linux
Azure Storage SFTP is Microsoft's managed file transfer service on top of Azure Blob Storage, convenient, but billed continuously per endpoint (roughl…
Deploying ClearML as a GCP Vertex AI Alternative on Ubuntu
Google Vertex AI is Google Cloud's managed ML platform with experiment tracking, training jobs, pipelines, a model registry, and endpoints, but it loc…
Deploying Matomo Analytics - An Open-Source Google Analytics Alternative
Matomo is an open-source web analytics platform that keeps full ownership of visitor data on infrastructure you control, a privacy-first alternative t…
Deploying Plausible Analytics - Self-Hosted Web Analytics Platform
Plausible Analytics is an open-source, self-hosted web analytics tool that tracks traffic without cookies or personal data collection, a privacy-first…
Deploying Dokploy - Self-Hosted PaaS for Docker Applications on Ubuntu 24.04
Dokploy is an open-source, self-hosted PaaS, a free alternative to Heroku, Vercel, and Netlify, that deploys apps from Git, manages databases, and rou…
Docker Smoke Tests for AWS SES Template Changes
AWS SES template changes look harmless in a pull request. Usually it is "just copy" or "just a handlebars variable." Then the deploy goes out and a mi…
I ran 29 real docker-compose projects on Apple's container runtime. Here's what broke
Docker Desktop keeps a ~7.8 GB Linux VM provisioned the entire time it's running — even when zero containers are up. Apple's new container runtime idl…
NetBox in Docker: The Migration Problems That Mattered More Than the Install
Installing NetBox is not the hard part. The hard part starts when NetBox is no longer an empty application. When it already contains valuable infrastr…
How to criar Dockerfiles eficientes com multi stage builds
Multi stage builds sao uma das melhores features do Docker para manter imagens pequenas e organizadas. Vou mostrar como aplicar isso em um projeto Pyt…
How I Organized Over 180,000 SVG Files into Searchable Collections
Developers love building things. Sometimes the hardest part isn't writing code—it's organizing data. Over the past few months, I've been building a la…