The cluster is broken. Fix the plumbing to bring the app to life (you'll know it's working when Rawkode taps his watch at you), then ship the v2 image to unlock his victory dance.

1/4 Secret management is a critical yet often overlooked aspect of DevOps. (Raise your hand if you've ever intentionally committed secrets to a Git repository.) This is why I've begun creating a series of educational content on the subject.

In this brief tutorial we'll explore the idea that Docker containers are just processes, from the perspective of the operating system. Based on this Securitylabs blog post https://securitylabs.datadog...

SSH port forwarding explained in a clean and visual way. How to use local and remote port forwarding. What sshd settings may need to be adjusted. How to memorize the right flags.

This exercise tests your ability to safely upgrade a multi-node Kubernetes cluster from version 1.30 to 1.31 following the standard upgrade procedure.

Start a Linux process and limit its CPU and memory usage with cgroups.

While "FROM scratch" containers may seem functional, they often lack essential components that programs expect to find in their execution environment. Discover the most common pitfalls of building con...

Practical DevOps problems for all skill levels and interests

Learn how to build a secure, lightweight, and production-ready Node.js application image in this hands-on challenge.

Learn how to build smaller, more secure Docker container images using Multi-Stage Builds. This guide explains common sources of image bloat, best practices for slimming down production images, and pra...

cdebug - a swiss army knife of container debugging - iximiuz/cdebug

Choosing the right base image for your Node.js application can drastically affect its security, size, and performance. This post breaks down popular options - from slim and distroless to full-sized im...

Skill up in Linux, Networking, Containers, and Kubernetes by taking courses, following interactive tutorials, and solving fun DevOps challenges.

Tasks Dev Tools, new DevOps challenges, iximiuz Labs 2024 in review, and a bunch of great reads 🚀

Can a Kubernetes Pod be created with plain Docker commands? Learn the difference between Containers and Pods by exploring how they are implemented under the hood.

Can you resolve issues with a Node.js container's termination process to ensure graceful shutdown on 'docker stop'?

Can you make a container exit gracefully after the 'docker stop' command while preserving its extensible entrypoint mechanism?

Bring your understanding of Docker to the next level - start an Nginx container performing every main step of the process manually.

This exercise tests your ability to configure kubernetes network nolicies to make sure only pods with specific labels can communicate with each other.

A multi-node Kubernetes cluster provisioned with kubeadm, allowing you to choose your preferred container runtime and networking plugin. Perfect for CKA, CKAD, and CKS preparation. Starts instantly. N...

The latest Python 3.x, pyenv, uv, Docker, VS Code, and a bunch of extensions. Starts instantly. No paywall.