Cover image for Effective Feature Management

Effective Feature Management

Author John Kodumal
Release Date: 2019/02/01
ISBN: 9781492038177
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Book Description

Feature flags give software organizations the power to reduce risk, iterate more quickly, and gain more control. This practical ebook explains how feature flags let you decouple feature rollout from code deployment—so you can control who sees what when, independent of release.

John Kodumal, cofounder and CTO of the leading feature management platform LaunchDarkly, shows you how feature flags fit into your process, including how to combine them with blue-green deployments and branching. Ideal for developers, ops personnel, designers, product managers, and marketers, this guide teaches you how feature flags can unlock the true power of your software and enable you to deliver better results for your customers.

You’ll learn:

  • How feature flags provide a decision point in your code that can change the behavior of your application
  • Feature management use cases, including progressive delivery, infrastructure migrations, and experimentation and testing
  • Best practices for incorporating feature management into your development process
  • Requirements and considerations for selecting an enterprise-grade feature management platform
  • How companies already using feature flags can apply advanced use cases, such as database migration

Table of Contents

  1. Introduction
  2. 1. Feature Management
    1. What Is a Feature Flag?
    2. Ship When You’re Ready
    3. Deploy != Release
    4. Test in Production
      1. True Test Environments Are Difficult to Create
      2. Test in Production
      3. Percentage Deployments
      4. Ring Deployments
    5. Stay in Control
      1. Flag Early and Often
      2. Safety Valves and Circuit Breakers
      3. Infrastructure Migrations
    6. Experiment with Everything
      1. Monitoring/Baselines
      2. A/B Testing
      3. User Feedback
    7. Customize on the Fly
      1. Entitlements and Plan Management
      2. Dynamic Configuration Management
    8. Summary
  3. 2. Advice from the Front Lines
    1. First Steps with Feature Flags
      1. Your First Feature Flag
      2. Feature Flags in Your Workflow
      3. Flags and Branching Strategies
    2. Testing with Feature Flags
      1. Should I Test All Combinations of Flags?
      2. Flags and Libraries
      3. Unit Testing
      4. Integration Testing
    3. Managing Technical Debt
      1. Appoint a Maintainer
      2. Set Expiration Dates
      3. Flag Removal Branches and Pull Requests
      4. Finding Flag References
    4. Scaling to Large Teams
      1. Permissions and Role-Based Access Controls
      2. Collaboration
      3. Organizing Flags
    5. Feature Flags Versus Blue/Green Deploys
    6. Feature Flags Versus Configuration Management
    7. Summary
  4. 3. Selecting a Feature Management Platform
    1. Feature Management
    2. Feature Management Is Mission Critical
      1. Design for Scale
      2. Polling Versus Streaming
      3. Design for Failure
    3. Design for Collaboration
      1. Adoptable
    4. Summary
3.137.212.212