What rollback and comms plan should we prepare in case the Tilda roll-out causes performance regressions?

Use feature flags in your code first, then surround the new features with conditional logic that verifies the flag's status. This will allow you to use feature flags and policy controls to limit UDYAM features to a pilot group. Next, target particular user segments and control flag states using a feature flag management platform. Next, create a pilot group role and set up your identity and access management (IAM) system to provide them access to the feature flags. This will allow you to layer policy constraints, like Role-Based Access Control (RBAC). In order to guarantee that only the chosen pilot users see and utilize the new UDYAM features, configure the feature flag system to enable the flag for them only.

By defining environment variables on the control plane components, you can use Istio's feature flags through Helm to govern specific functions, such new features for a specific pilot group, and limit Istio features to that group. To ensure that only authorized users and workloads can access sensitive features, combine these technical controls with Istio's AuthorizationPolicy to create default-deny rules. Then, use a multi-layered strategy that includes Kubernetes resources and careful configuration to define the pilot group and its access permissions.

Potential change-freeze windows

• Thursday, October 2nd: Mahatma Gandhi Jayanti and coincides with Dussehra.
• Saturday, October 11th - Sunday, October 12th: October 11th is a regional holiday in many states, Saturday and October 12th is a Bank Holiday across all of India for Dussehra.
• Monday, October 20th: Diwali/Deepavali

If your Amazon ECS (Elastic Container Service) rollout causes performance regressions, like higher task latency, container crashes, or longer deployment times, your rollback and communications plan should focus on rapid environment recovery, clear visibility, and calm communication.

ECS handles this natively, therefore always begin a rollback by maintaining the versioning of earlier ECS task definitions and service configurations. One command (aws ecs update-service --force-new-deployment --task-definition ) will then allow you to immediately redeploy the most recent stable version. In the event that your roll-out required a change to the AMI, Docker image, or networking configuration (such as moving to a new cluster or Fargate), save snapshots and image digests so you can easily go back to what was functioning. Additionally, be prepared with CloudWatch dashboards and auto-scaling alerts to identify CPU, memory, or throttle surges early. If thresholds are maintained, a rollback should occur immediately.

Don't allow quiet to generate fear on the communications side. You should immediately post a brief message in your internal DevOps or issue Slack channels, such as: We're seeing elevated latency after the ECS roll-out reverting to the last stable task definition. No impact on customers or data loss is anticipated. If production users are impacted by the regression, then update your status page. Keep communications cool, factual, and time-bound; include the beginning and ending times of the rollback.
Once stability has returned, plan a brief post-mortem analysis and note what went wrong (e.g., task networking, service discovery, container image size), what early warnings were overlooked, and which metrics will be checked again later (e.g., CPU reservation accuracy, deployment length, or p99 latency). The objective is to demonstrate control by communicating clearly, learning methodically, and rolling back quickly so that the next ECS update goes more smoothly.

Potential change-freeze windows

• Thursday, October 2nd: Mahatma Gandhi Jayanti and coincides with Dussehra.
• Saturday, October 11th - Sunday, October 12th: October 11th is a regional holiday in many states, Saturday and October 12th is a Bank Holiday across all of India for Dussehra.
• Monday, October 20th: Diwali/Deepavali