Flux

The Core of Continuous Delivery

Reason

Understanding Flux as the central orchestrator for managing and deploying applications to Kubernetes clusters.

Key Concepts

Flux’s architecture, its role in CI/CD, how it interacts with Git repositories, and its integration with various Kubernetes deployment tools (Kustomize, Helm).

Kubernetes

The Foundation

Reason

Understanding Kubernetes concepts is vital for comprehending how Flux operates and how applications are deployed and managed within a containerized environment.

Key Concepts

Namespaces, Pods, Deployments, Services, Ingress, Custom Resource Definitions (CRDs), Controllers, and basic Kubernetes YAML syntax.

Kustomize

Configuring Deployments for Multiple Environments

Reason

Learning about Kustomize enables the user to manage different configurations for different Kubernetes environments (staging, production, development) without code duplication.

Key Concepts

Kustomization overlays, patches, resources, and how Kustomize interacts with Flux.

Helm

Package Management for Kubernetes

Reason

Helm allows for the packaging and deployment of complex applications, including dependencies and configurations, making it efficient for managing applications.

Key Concepts

Helm charts, values files, repositories, releases, and how Flux leverages Helm for deployment.

GitOps

The Principles of Infrastructure as Code

Reason

GitOps lays the foundation for this codebase’s approach to infrastructure management. It promotes version control, automated deployments, and continuous observability.

Key Concepts

Git as the single source of truth, declarative configuration, automatic reconciliation, and the benefits of GitOps in terms of collaboration, security, and transparency.

Infrastructure as Code (IaC)

Automating Cluster Setup

Reason

IaC allows for consistent, reproducible, and automated infrastructure creation and management. This codebase utilizes it to streamline the setup of Kubernetes controllers and other core components.

Key Concepts

YAML-based configurations, resource definitions, deployment automation, and the advantages of IaC for scalability and maintainability.

Multi-Cluster Deployment

Scaling Applications Across Multiple Environments

Reason

This codebase demonstrates how to manage applications across distinct Kubernetes environments (staging, production). Understanding multi-cluster deployments is crucial for complex applications.

Key Concepts

Configuration strategies for multiple environments, managing resource differences, and the benefits of centralized management with Flux.