AZ-400: High-Stakes Payment API Deployment! #shorts
The Solution: Canary Deployment
To safely roll out a mission-critical API with a strict 5% traffic limit, the Canary strategy is your best bet. By using Azure Front Door’s weighted routing, you can direct a tiny sliver of global traffic to your new AKS deployment while keeping the other 95% on the stable version. This setup allows for an instant rollback—if the canary starts throwing errors, you simply flip the traffic weights back in Front Door, ensuring the vast majority of your users never even knew there was a problem.
Why not the others?
Don't get tempted by Blue-Green; it’s usually an "all-or-nothing" switch that violates that 5% exposure rule. In-place rolling upgrades are too risky here because rolling back requires re-deploying or "un-doing" pod replacements, which isn't nearly as fast as a network-level weight shift. And definitely skip the App Service Proxy—it just adds unnecessary architectural bloat without providing the granular traffic precision you need. For the AZ-400, remember: Gradual + Weighted = Canary. ?
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