Tanzu Interview Questions and Answers for 10 years experience

1. What are the key components of Tanzu Application Platform?

   • Answer: Tanzu Application Platform (TAP) comprises several key components: Supply Chain, Application Accelerator, Runtimes (including Cloud Foundry and Kubernetes), Monitoring, and the backing services like databases and message queues. It's designed for streamlined application development, deployment, and management. Each component plays a crucial role in providing a complete platform.

2. Explain the difference between Tanzu Kubernetes Grid (TKG) and Tanzu Mission Control (TMC).

   • Answer: TKG is the infrastructure layer that allows you to create and manage Kubernetes clusters on-premises, in a public cloud, or a hybrid environment. TMC is the management plane that provides centralized monitoring, governance, and lifecycle management of multiple TKG clusters across diverse environments. TKG builds the clusters; TMC manages them.

3. Describe your experience with Tanzu Build Service. What are its benefits?

   • Answer: [This answer will vary based on individual experience. A strong answer would detail specific projects using Tanzu Build Service (TBS), highlighting its capabilities such as streamlined CI/CD pipelines, automated image building and promotion, integration with various registries, and improved security and repeatability through its declarative approach. Benefits would include faster build times, reduced errors, and enhanced collaboration.]

4. How would you troubleshoot a deployment issue in a Tanzu environment?

   • Answer: Troubleshooting involves a systematic approach. I'd start by checking logs (cluster logs, application logs, pod logs), examining resource utilization (CPU, memory, network), inspecting the deployment YAML for errors, using kubectl to analyze pod status and events, and leveraging the monitoring tools provided by Tanzu (e.g., Wavefront by VMware). Depending on the issue, I may also investigate networking configurations, service accounts, and permissions.

5. Explain your understanding of Tanzu Service Mesh. How does it improve application resilience?

   • Answer: Tanzu Service Mesh (based on Istio) provides features like service discovery, traffic management, security, and observability for microservices running within a Kubernetes cluster. It improves resilience by offering features such as circuit breaking, retries, fault injection, and traffic routing that allow applications to gracefully handle failures and maintain availability.

6. How do you manage secrets in a Tanzu environment?

   • Answer: I would use Kubernetes Secrets and leverage tools like HashiCorp Vault or other secrets management systems to store and manage sensitive information such as passwords, API keys, and certificates securely. These secrets are then injected into the applications through secure methods like environment variables or Kubernetes ConfigMaps.

7. Discuss your experience with implementing security best practices in a Tanzu environment.

   • Answer: [This answer should detail experience with implementing RBAC, network policies, pod security policies (or their equivalent in newer Kubernetes versions), secrets management, image scanning, vulnerability management, and regular security audits. Specific examples from previous projects would strengthen this answer.]

8. How would you monitor the performance of applications deployed on Tanzu?

   • Answer: Tanzu offers monitoring capabilities through Wavefront by VMware or other integrated monitoring tools. I'd leverage these tools to track key metrics such as CPU utilization, memory usage, request latency, error rates, and other relevant application-specific metrics. Alerting would be configured to notify of any performance degradation or potential issues.

9. Explain your experience with deploying and managing applications using Cloud Foundry on Tanzu.

   • Answer: [This answer should detail experience with deploying applications using `cf push`, managing services, understanding Cloud Foundry concepts like buildpacks, service brokers, and application lifecycles. Mention any challenges faced and how they were overcome.]

10. Describe your experience with using the Tanzu CLI.

    • Answer: [This answer should detail specific Tanzu CLI commands used, experience with managing clusters, deploying applications, troubleshooting issues, and automating tasks. Mention specific use cases demonstrating proficiency.]

11. Question 11: What is your experience with Tanzu Application Service (TAS)?

    • Answer: I have extensive experience with TAS, including application deployment, scaling, managing services, and troubleshooting issues. I've worked with various buildpacks and have a deep understanding of its architecture and underlying components. I've also implemented custom buildpacks and integrated TAS with various CI/CD pipelines.

12. Question 12: How would you handle a Kubernetes cluster outage in a production Tanzu environment?

    • Answer: My first step would be to identify the root cause using monitoring tools and cluster logs. Then, depending on the issue, I'd implement a remediation strategy which could include: restoring from backups, scaling up resources, troubleshooting network issues, or rolling back deployments. In the event of a critical failure that can't be easily fixed, a failover mechanism to a secondary cluster would be activated.

13. Question 13: Explain your understanding of Kubernetes namespaces and their importance in Tanzu.

    • Answer: Kubernetes namespaces are a crucial mechanism for logically dividing a cluster into isolated virtual clusters. In Tanzu, they are critical for multi-tenancy, resource isolation, and security. Different teams or applications can be assigned to different namespaces to prevent conflicts and improve security by limiting access based on namespace.

14. Question 14: How do you manage application configurations in a Tanzu environment?

    • Answer: I utilize ConfigMaps and Secrets in Kubernetes to manage application configurations. This allows for separating configuration data from application code, making deployments more flexible and manageable. I also leverage external configuration management systems where necessary, keeping configuration changes auditable and version controlled.

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