DevOps Intermediate

What is Containerization?

A lightweight virtualization method that packages applications with their dependencies into isolated, portable containers.

Containers package code, runtime, libraries, and settings together, ensuring applications run identically everywhere. Unlike VMs, containers share the host OS kernel, making them faster to start and more resource-efficient.

Docker is the most popular containerization platform. Container images are built from Dockerfiles, stored in registries (Docker Hub, ECR), and orchestrated by Kubernetes or Docker Swarm for production deployments.

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Related Terms

Continuous Integration and Continuous Deployment — automated practices for building, testing, and deploying code changes.

A documented set of standardized procedures for handling routine operations and incident response in production systems.

Service Discovery

A mechanism that automatically detects and tracks the network locations of service instances in distributed systems.

A CI/CD platform integrated into GitHub that automates build, test, and deployment workflows using YAML configuration.

An architectural style where an application is composed of small, independent services that communicate over APIs.

A package manager for Kubernetes that simplifies deploying and managing applications using reusable, configurable charts.

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