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Viper: Go Configuration with Fangs - Flexible and Robust Settings Management for Golang Applications
Viper is a comprehensive configuration solution for Go applications, designed to work with 12-factor apps and handle all types of configuration needs, including environment variables, command-line flags, and remote key-value stores.
Go
Added on 2025年6月21日28,718
Stars2,055
ForksGo
LanguageProject Introduction
Summary
Viper is a complete and robust configuration library for Go (Golang) applications. It is designed to ease the burden of reading, parsing, and managing application settings from different input types, making it ideal for microservices, command-line tools, and web applications.
Problem Solved
Managing configuration in modern applications from diverse sources (files, environment, flags, services) can be complex. Viper provides a unified and flexible interface to simplify loading, accessing, and managing configuration settings.
Core Features
Multiple Configuration Sources
Supports reading configuration from various sources including files (JSON, TOML, YAML, HCL, envfile, Java properties), environment variables, command-line flags, remote key-value stores (Etcd, Consul), and setting default values.
Runtime Configuration & Watching
Allows applications to read configuration values dynamically at runtime and includes capabilities to watch for changes in configuration files and trigger callbacks.
Tech Stack
Go
使用场景
Viper can be applied in almost any Go application that requires reading external configuration, from simple scripts to complex distributed systems.
Scenario 1: Configuring Microservices
Details
Configure database connections, API endpoints, logging levels, and other service-specific settings using environment variables and YAML files.
User Value
Ensures consistent configuration loading regardless of deployment environment and facilitates easy updates.
Scenario 2: Building Flexible Command-Line Tools
Details
Load default settings from a configuration file, allow overriding via command-line flags, and use environment variables for sensitive information like API keys.
User Value
Offers users multiple convenient ways to configure the tool, improving user experience and adaptability.
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