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Linux Performance Tuning with perf and Profiling Tools

In the world of DevOps and SRE, the Linux kernel is the foundation upon which all applications and services are built. When things go wrong—when latency spikes, throughput drops, or servers buckle under load—the blame game is useless. What's required is data. This is where Linux performance tuning becomes an indispensable skill. It’s the art and science of diagnosing bottlenecks at the system level and optimizing resource usage. While classic tools like top and iostat provide a high-level overview, modern, complex issues demand a more powerful lens. Enter perf , the most powerful profiling tool built directly into the Linux kernel. This comprehensive guide will take you on a deep dive into Linux performance tuning. We'll start with the "why," explore the core pillars of system performance, and then spend significant time mastering the perf command. We'll also cover other essential tools and look at the future of Linux observability with eBPF, providing y...

Future of Container and Kubernetes Security

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In less than a decade, containers and Kubernetes have fundamentally reshaped how we build, deploy, and scale software. From monolithic applications to sprawling microservice architectures, this cloud-native stack is the undisputed champion of modern infrastructure. But with great power comes a vastly expanded and dynamic attack surface. The security strategies that worked for static virtual machines are insufficient for the ephemeral, API-driven world of Kubernetes. As we look to the horizon, the evolution of Read more of Container and Kubernetes Security is not just about new tools; it's about a paradigm shift in how we approach defense, moving from reactive gatekeeping to proactive, intelligent, and deeply integrated security postures. The "secure the perimeter" model is dead. In a Kubernetes cluster, the "perimeter" is everywhere—at the API server, within the node, between pods, and all the way left in the CI/CD pipeline. The future of this domain ...

A Deep Dive into Kubernetes Admission Control

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In the complex, distributed world of container orchestration, securing and governing workloads is a paramount challenge. As the central nervous system of your cluster, the Kubernetes API server is the gateway for all changes. This makes Kubernetes Admission Control one of the most critical components for enforcing security, compliance, and best practices. It's the ultimate gatekeeper, deciding what is and isn't allowed to run in your cluster. This deep dive will explore every facet of admission control, from the fundamental concepts and built-in controllers to the dynamic power of webhooks and modern policy engines. What is Kubernetes Admission Control? At its core, Kubernetes Admission Control is a process, enforced by a series of plugins in the kube-apiserver , that intercepts requests *after* they have been authenticated and authorized. Think of it this way: Authentication (AuthN): Asks "Who are you?" (e.g., "You are user 'dev-jane'")...

Building agents with Google Gemini and open source frameworks

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The landscape of artificial intelligence is moving at a breakneck pace. We've shifted from models that simply predict text to sophisticated systems that can understand and interact with the world. At the forefront of this evolution is the concept of "AI agents"—autonomous systems that can reason, plan, and execute tasks. Powering these agents requires a state-of-the-art "brain," and this is where Google Gemini enters the picture. As Google's most capable and natively multi-modal model, it offers unprecedented capabilities for reasoning across text, images, code, and more. But a great brain needs a body and tools to interact with its environment. This is where open-source frameworks like LangChain and LlamaIndex shine, providing the essential scaffolding to build robust, production-ready agents. This article provides a comprehensive guide for MLOps engineers, DevOps specialists, and AI developers on how to build powerful agents by combining the intelligence ...

Deploy WordPress Blog on AWS: RDS & EC2 Setup

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In the world of web hosting, deploying a robust and scalable website is a foundational skill for any DevOps engineer, system administrator, or developer. While shared hosting is simple, it lacks control and scalability. This guide will provide a comprehensive walkthrough on how to deploy a WordPress blog on AWS, leveraging the power of EC2 (Elastic Compute Cloud) for our application server and RDS (Relational Database Service) for our managed database. This architecture is the gold standard for a professional, high-performance WordPress installation, giving you full control over your environment. By separating the web server from the database, we create a more resilient, secure, and independently scalable system. We will cover everything from launching the instances and configuring security groups to installing the necessary software and completing the WordPress setup. Why Use AWS (EC2 + RDS) for Your WordPress Site? Before we dive into the "how," let's understand ...