You're faced with a client pushing for a new tech integration. How do you navigate potential app disruptions?

First thing first, one should assess - All in once approach vs one at a time approach. - if the solution needs migration to newer technologies chances are it would be an old monolithic solution. That kind of solutions most often can’t be done one at a time migration or update and hence require a significant downtime. - if the solution does need a significant downtime assessment of the impacts and an alternative solution placement becomes critical. - Based on the available options then migration can take place. - Decide the optimal tech stack and start the migration.

When integrating new systems: 1. Assess client requirements and project scope 2. Analyze potential impacts and critical dependencies 3. Develop a comprehensive strategy with timelines 4. Communicate early and clearly with stakeholders 5. Secure critical data with robust backups 6. Prepare contingency and rollback plans 7. Conduct thorough testing in controlled environments 8. Implement changes in phases to minimize disruption 9. Monitor closely during and after integration 10. Review, optimize, and provide ongoing support 11. Document the process for future reference This approach ensures a smooth, secure, and efficient integration process.

Plan the integration in a different environment to prevent disruptions. Open up this environment to a limited set of users to test the functionality thoroughly before opening up the same to the entire group.

Perform AB testing to ensure the newly integrated features work flawlessly. A canary deployment strategy is suggested to rollout changes incrementally. In a microservices based app in Kubernetes we can do a deployment strategy of rolling update to achieve this.

Use modern observability tools to monitor performance in an automated way. Suggested tools are Prometheus, Grafana, ELK, Micrometer etc. Set up relevant dashboard panels for each environment to track metrics individually.