What Is a Canary Release? Safe Deployment Strategy
A canary release gradually rolls out new code to a small subset of users before a full rollout. Learn how to use it with OpenClaw.
A canary release exposes a new version to a small percentage of users before rolling it out to everyone. The name comes from the mining practice of bringing canaries into tunnels to detect dangerous gases — if the canary survives, it's safe.
Implementing Canary Releases
With Fly.io Machines API, you can run multiple app versions simultaneously and use their proxy to split traffic. For example, launch a new machine with your updated image, then gradually shift weight from the old machine to the new one.
OpenClaw and Canary Releases
OpenClaw doesn't have a built-in canary strategy, but because it exposes the raw Fly Machines API, you can implement traffic splitting yourself. Route 5% of traffic to the new version, monitor error rates, then shift more if everything looks healthy.
When to Use It
Canary releases shine for high-stakes deployments — new AI model versions, major API changes, or significant UI overhauls. For minor bug fixes, Fly's default rolling deployment is usually sufficient.