deployment-procedures

Zero downtime deployment utilizes Rolling, Blue-Green, and Canary release techniques to update production applications without interrupting service. These strategies route traffic incrementally to new versions while maintaining the old environment until verification confirms stability.

A safe rollback procedure reverts production to the previous stable version by executing pre-defined decision-making steps when verification checks fail. It requires confirming the rollback plan is in place before deploying, ensuring rapid restoration of service without data loss.

A pre-deploy checklist for application releases includes completing all necessary verification steps, confirming the rollback strategy, and reviewing deployment principles. It ensures secure release workflows are followed before any production changes are executed.

Canary deployments route a small subset of traffic to the new version to verify stability, whereas blue-green deployments switch the entire production environment between two identical instances. Choose canary for gradual risk assessment and blue-green for instant environment switching.

No specific DevOps tools are required as these deployment procedures provide platform-agnostic principles and decision-making guidance. The strategies for zero downtime and rollbacks are applicable across various platforms and toolchains used by software engineers.