How do I achieve zero-downtime deployments for On-call rotations?

Achieving zero-downtime deployments is crucial for maintaining service availability and reliability, especially during on-call rotations. This process minimizes service interruptions and enhances the overall customer experience. Below are key strategies to implement zero-downtime deployments:

• Blue-Green Deployments: Maintain two separate environments (blue and green). One environment serves live traffic while the other is idle, allowing you to switch with zero downtime.
• Canary Releases: Roll out the deployment to a small percentage of users before a full production release. Monitor the impact before gradually increasing the traffic.
• Rolling Updates: Update a few instances at a time without taking down the entire service, thus keeping the application accessible to users.
• Feature Toggles: Deploy new features turned off and enable them gradually. This allows for quick rollbacks if issues arise.

Implementing these strategies can significantly improve the deployment process and reduce risks associated with on-call incidents.