Overview
Named after the 'canary in a coal mine,' this strategy allows teams to test a new version in production with minimal impact. If the 'canary' version performs well and shows no errors, it is gradually rolled out to more users until it replaces the old version.
Key Benefits
- Risk Mitigation: Issues only affect a small percentage of users.
- Real-world Testing: Provides feedback on performance and stability under actual production load.
- Gradual Rollout: Allows for monitoring and adjustment throughout the deployment process.
Implementation
Often implemented using service meshes (like Istio) or advanced load balancers that can route a specific percentage of traffic to the new version.