Canary and blue-green releases

Canary sends a small share of traffic to the new version and watches errors before going further; blue-green keeps two full environments and switches traffic at once, with instant rollback.

Where it shows up in real systems

  • Feature flags

    Enables canary releases, kill switches and gradual rollouts. Stale flags become technical debt, so remove them once a rollout is complete.

    In production: LaunchDarkly, Unleash, AWS AppConfig, Flagsmith

See it break, then fix it

Build an architecture, send it a day of traffic and outages, and learn why it holds or fails. Free to start.

Open the learning path Open the sandbox