Kubernetes Interview Questions Part 2
Question 1: How do you automate Kubernetes deployment?
Answer: Automation in Kubernetes involves understanding the DevOps flow. This includes checking in application code into a code repository, dockerizing the application, creating a container image, and deploying it to a Kubernetes cluster. Tools like Jenkins, CodeBuild, or GitLab can be used for dockerization and deployment.
Question 2: How do you secure Kubernetes applications?
Answer: Kubernetes application security involves two aspects: securing the application running on the cluster and DevSecOps for the container DevOps lifecycle. This includes using role-based access control (RBAC), IRSA, and tools for scanning container images for vulnerabilities.
Question 3: How do you cost or performance optimize a Kubernetes application?
Answer: Optimization involves analyzing the control plane cost and the worker node’s resource usage. The key is to optimize the CPU and memory allocation using tools like CloudWatch Container Insights or third-party tools like Kubecost to reduce waste and improve cost efficiency.
Question 4: Tell me about a challenge you faced in a Kubernetes application.
Answer: A common challenge is upgrading the Kubernetes cluster to a new version while maintaining high availability and respecting pod disruption budgets. Solutions include using EKS managed node groups and ensuring the application remains up and running during the update process.
Question 5: How do you scale Kubernetes?
Answer: Scaling can be achieved through Horizontal Pod Autoscalers and Cluster Autoscalers. Another method used in critical applications is cluster over-provisioning, where additional EC2 worker nodes are brought up with pause pods to ensure quick scaling when needed.
Question 6: How do you expose a Kubernetes microservice to consumers?
Answer: Exposing pods to the outside world typically involves using services like…
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