Software teams want to move faster and deliver features to end users sooner. Continuous delivery and DevOps promise to deploy quickly. However, pushing faster and deploying more often increase the risk of breaking—and subsequent downtime. Edith Harbaugh finds that a feature flagging system of gating features—and being able to quickly turn them on or off—enables development teams to ship more frequently. With feature flags, engineering changes are pushed live to production “off” and then turned on for different users. Feature flags allow developers to separate deployment from rollout, enabling the ability to quickly throttle features for different user segments. Feature flags are used by Google, Facebook, LinkedIn, and Amazon to reduce risk, increase time to market, and delight end users. Learn how your developers, product managers, and testers can use feature flags for opt-in early access, private beta, canary launches, and dark releases.

1. AT14
Session
6/9/16 3:00 PM
Use Feature Flags for Clean
Deployments
Presented by:
Edith Harbaugh
LaunchDarkly
Brought to you by:
350 Corporate Way, Suite 400, Orange Park, FL 32073
888---268---8770 ·· 904---278---0524 - info@techwell.com - http://www.techwell.com/

2. Edith Harbaugh
LaunchDarkly
CEO and cofounder of LaunchDarkly Edith Harbaugh has more than fifteen years
of experience in software engineering with both consumer and enterprise
startups. Previously, she scaled TripIt to 10 million users. Edith was product
manager at Vignette, a global content management company, which powered
NASA, Volkswagen, and IRS.gov. She co-hosts To Be Continuous
(@continuouscast), a podcast on software trends. Edith holds two patents in
deployment between QA, staging, and production.

3. 6/5/16
1
Feature Flags for Clean
Deployments
Edith Harbaugh
@LaunchDarkly LaunchDarkly.com
Edith Harbaugh
• Cofounder & CEO, LaunchDarkly
• Podcast cohost, “To Be Continuous”
• BS Engineering Harvey Mudd College
• Engineering, Epicentric & Vignette
• Product, Monster.com, EasyBloom, TripIt
• Marketing, Concur

4. 6/5/16
2
Tsunami Software Releases
Feature Flags

5. 6/5/16
3
Feature Flags!
• Push functionality to who you want, when you want
• Expand or roll back, without a new deployment
• Separate code deployment from business logic
• Get real-world feedback and analytics
• No more long running branches with merge conflicts
Use Feature Flags to expose functionality
when you want, to who you want

6. 6/5/16
4
No long lived branches
Kill Your Staging Server
Developer
Environments
QA STAGING PRODUCTION

7. 6/5/16
5
Early Access Betas
Opt-In

8. 6/5/16
6
Block
Rollouts

9. 6/5/16
7
Hypothesis Driven Development
Newbie > Power User

10. 6/5/16
8
Subscription
Sunset

11. 6/5/16
9
Best Practices for Feature Flagging
• What’s the right level of flagging?
• Ambiguously named flags
• Misunderstood flags
• Removing flags
• Control access to flags
• Visibility to non-technical users
• Logging
• Dependency tracking
edith@launchdarkly.com
@Edith_H
@continuousCast