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Kustomize - Kubernetes Native Configuration Customization
Kustomize lets you customize raw, template-free YAML files for multiple purposes, leaving the original files untouched. It's used for defining application configuration variations in Kubernetes deployments.
Go
Added on 2025年5月22日11,450
Stars2,307
ForksGo
LanguageProject Introduction
Summary
Kustomize introduces a template-free way to customize application configuration files. It allows users to create variations of plain YAML files for different environments or use cases without modifying the original sources, promoting declarative configuration management.
Problem Solved
Traditional templating approaches for Kubernetes YAML can become complex and hard to manage. Kustomize solves this by using a overlay-based approach, merging customization layers on top of base configurations, making it easier to handle variations (dev, staging, prod) and keep configurations DRY (Don't Repeat Yourself).
Core Features
Template-free customization
Uses patches and transformers to modify YAML, avoiding complex template languages.
Overlay-based structure
Organizes configurations into base and overlay directories for clear separation of concerns.
Integration with kubectl
Built into kubectl, allowing direct application of kustomized configurations.
Resource generators and transformers
Provides built-in capabilities to generate resources (like ConfigMaps, Secrets) and transform fields (like image tags, labels, annotations).
Tech Stack
Kubernetes
YAML
Go
使用场景
Kustomize is ideal for managing Kubernetes configurations across different environments, teams, or feature branches. Key use cases include:
环境差异化配置 (Dev, Staging, Prod)
Details
定义一套基础配置（base），然后为每个环境创建独立的overlay，仅包含环境特定的修改（如副本数、资源限制、ingress host）。
User Value
简化多环境配置管理，减少错误，提高部署一致性。
多应用或微服务配置管理
Details
将每个应用或服务的基础配置放在一个base中，其他项目或团队可以将其作为依赖，在其overlay中添加自己的定制化配置。
User Value
促进配置的模块化和重用，降低维护成本。
功能分支或A/B测试配置
Details
为特定的功能分支或A/B测试部署创建临时的overlay，仅修改特定服务的镜像版本或启用特定功能。
User Value
快速、灵活地部署和测试不同的应用版本或配置变体。
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