Docker

Introduction Docker has revolutionized application deployment by enabling developers to package applications and their dependencies into lightweight, portable containers. However, containers don’t exist in isolation—they need to communicate with each other, with the host system, and with external networks. This is where Docker networking comes in. Understanding how Docker networking works is essential for building scalable, secure, and efficient containerized applications. Docker networking is the system that enables containers to communicate with each other, the host, and external networks[3]. It defines how data flows between containers and provides the infrastructure necessary for multi-container applications to function seamlessly. Whether you’re running a simple web application or a complex microservices architecture, mastering Docker networking is crucial for success. ...

Introduction The rise of AI agents has created a fundamental challenge: how do you connect dozens of LLMs to hundreds of external tools without writing custom integrations for every combination? This is the “N×M problem”—managing connections between N models and M tools becomes exponentially complex. The Model Context Protocol (MCP) solves this by providing a standardized interface between AI systems and external capabilities. Docker’s integration with MCP takes this further by containerizing MCP servers, adding centralized management via the MCP Gateway, and enabling dynamic tool discovery. ...

Docker has revolutionized software development and deployment by providing lightweight, portable containers that package applications and their dependencies together. But how exactly does Docker work under the hood to achieve this isolation and efficiency? This article takes a comprehensive look at Docker’s internal architecture, explaining the key components and how they interact to create and run containers. Table of Contents Introduction Docker’s Client-Server Architecture Key Docker Components Docker CLI Docker Daemon (dockerd) Container Runtime (containerd and runc) Linux Kernel Features How Docker Creates and Runs a Container Filesystem Management with OverlayFS Networking and Isolation Resource Management via cgroups Conclusion Introduction Docker containers provide isolated environments that behave like virtual machines but share the host OS kernel, making them highly efficient. This is achieved through a combination of Linux kernel features, container runtimes, and Docker’s own architecture. Understanding these layers helps in optimizing container usage and troubleshooting complex issues. ...

Introduction Microservices promise speed, scalability, and team autonomy by decomposing a system into small, independently deployable services. But they also introduce complexity in distributed systems, data consistency, and operational overhead. This in-depth, zero-to-hero guide walks you through microservices architecture from fundamentals to production-ready practices. You’ll learn when to choose microservices, how to design services and APIs, what tooling to adopt, and how to deploy, secure, and observe them at scale. Code snippets and reference patterns are included to bridge theory and practice. We end with curated resources for further study. ...