Architecture Intermediate
Canary Releases — Gradual Rollout¶
CanaryDeploymentProgressive Delivery 3 min read
Gradual deployment of a new version to a small subset of users. Monitoring, rollback, and automation.
Principle¶
The new version receives a small percentage of traffic (1-5%). Monitor error rate and latency. If OK, increase.
Phase 1: 2% traffic → new version (monitoring 15 min)
Phase 2: 10% traffic → new version (monitoring 30 min)
Phase 3: 50% traffic → new version (monitoring 1h)
Phase 4: 100% traffic → new version
Nginx Weighted Routing¶
upstream app {
server old-version:8080 weight=95;
server new-version:8080 weight=5; # 5% canary
}
Automation¶
Tools like Argo Rollouts or Flagger automate canary releases: they monitor metrics and automatically roll back on issues.
Summary¶
Canary minimizes the blast radius of a new version. Combine with good monitoring for automatic rollback.
Need Help with Implementation?¶
Our team has experience designing and implementing modern architectures. We’re happy to help.