Configuration Patterns


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Configuration Patterns

About the Book

Any application normally needs some environment-specific configuration details: the hostname and port of the database server, the access token for the mail delivery service API and many others. Once your application starts spanning more than one machine, the distribution of the configuration can start becoming troublesome.This book shows some approaches for managing and distributing the configuration of your Node application.

About the Author

Pedro Teixeira
Pedro Teixeira

Geek, programmer, freelancer, and entrepreneur. Author of some Node.js modules, the Node Tuts screencast show, and the Hands-on Node.js e-book and overall fervent proclaimer of the Node.js creed.

Wrote a book for Wiley on Node.js.

Partner of YLD.

Organizer of the Lisbon JavaScript Conference.

Table of Contents

  • 1. The source code
  • 2. Introduction
  • 3. A Singleton module that exposes conf data
    • 3.1 Using a façade module
  • 4. Using Environment variables
  • 5. Cascading configuration
  • 6. Using CouchDB to store and propagate configuration changes
    • 6.1 Installing and setting up CouchDB
    • 6.2 Creating a configuration database
    • 6.3 Getting the changes
    • 6.4 Client example
  • 7. Propagating configuration changes using Conflict-free Replicated Data Types (CRDTs)
    • 7.1 Configuration TCP server
    • 7.2 Configuration TCP client
    • 7.3 The command line
    • 7.4 Inducing configuration changes
    • 7.5 Persistence
    • 7.6 Possible topologies
  • 8. Summary

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