05.3.1 · Skill in Controlled releases

Feature flags

Turning features on and off without deploying.

Feature flags separate deploying from releasing. They enable gradual rollouts, experiments, beta access and kill switches. Old flags need removing, or they become technical debt.

Your status · Feature flags

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Resources

articleGo deeper
Feature toggles (aka feature flags) ↗
Pete Hodgson (martinfowler.com) · 2017 · 35 min
The four kinds of feature flags, how long each should live, and how to stop them turning into debt.

Tools

ToolOpen source
Unleash
getunleash.io ↗
Open-source feature flag platform for gradual rollouts, kill switches and experiments.
ToolOpen source
Flagsmith
flagsmith.com ↗
Open-source feature flag and remote config service, hosted or self-hosted.
ToolPaid
LaunchDarkly
launchdarkly.com ↗
Feature management platform for targeted rollouts, release monitoring and experiments.