Real-Time OpenShift Interview Questions with Answers [2025]

Real-Time Application Deployment

1. What is OpenShift’s role in real-time app deployment?

• Automates containerized app deployments.
• Uses Kubernetes for orchestration.
• Supports Source-to-Image (S2I) builds.
• Manages routes for external access.
• Ensures secure networking.
• Monitors with Prometheus.

OpenShift streamlines real-time deployments for interviews.

2. Why deploy apps in real-time on OpenShift?

OpenShift enables rapid deployments with integrated CI/CD, S2I, and routes. It offers RBAC for security and Prometheus for live monitoring. Compared to manual Kubernetes, it reduces complexity. Validate deployments in a test project to show real-time expertise for certification interviews.

3. When do you use oc new-app in real-time?

• Deploy apps quickly from Git.
• Run oc new-app my-repo.git.
• Support Docker image deployments.
• Validate in test project.
• Monitor with Prometheus.
• Ensure route accessibility.

Rapid app setup is needed for live updates, showing deployment skills.

4. Where do you configure real-time deployment strategies?

Configure strategies in DeploymentConfig using oc edit dc/my-app. Set Rolling or Recreate strategies for live updates. Validate in a test project to ensure zero-downtime deployments. Monitor with oc describe dc/my-app to show real-time deployment skills.

5. Who handles real-time app rollbacks?

• Developers initiate rollbacks.
• Use oc rollback dc/my-app.
• Collaborate with DevOps for validation.
• Validate in test project.
• Monitor with Prometheus.
• Ensure rollback stability.

A deployment fails in production, showing rollback expertise.

6. Which tools support real-time deployments?

OpenShift integrates with Ansible for automation, Jenkins for CI/CD, and Helm for packages. Use oc new-app for quick setups.

• Configure Ansible for live configs.
• Use Jenkins for pipeline automation.
• Validate in test project.
• Monitor with Prometheus.

This enhances real-time deployment skills.

7. How do you deploy multi-container apps in real-time?

• Define pod YAML with multiple containers.
• Apply with oc apply -f multi.yaml.
• Configure shared volumes.
• Validate in test project.
• Monitor with oc describe pod.
• Ensure network connectivity.

An app needs multiple services live, showing deployment expertise.

8. What is a DeploymentConfig’s role in real-time?

DeploymentConfig manages live app deployments, supporting Rolling or Recreate strategies. It triggers updates via image or config changes. Compared to Kubernetes Deployments, it offers built-in triggers. Validate in a test project to show real-time deployment skills.

9. Why use templates for real-time deployments?

• Ensure consistent live deployments.
• Define reusable app configs.
• Store in OpenShift Catalog.
• Validate in test project.
• Monitor with Prometheus.
• Simplify team workflows.

Teams need standardized live setups, ensuring deployment consistency.

10. When do you use image streams in real-time?

Use image streams to manage container images, tracking live updates and triggering deployments. Configure via oc create imagestream my-app. Validate in a test project for automatic updates. Monitor with oc describe is/my-app to show real-time image skills.

11. Where do you store real-time app configs?

• Use ConfigMaps for non-sensitive data.
• Store secrets in Secrets.
• Apply with oc create configmap my-config.
• Validate in test project.
• Monitor with oc describe cm.
• Ensure secure access.

Apps need live configs, supporting deployment skills.

12. Who manages real-time app failures?

A deployment fails in production. Developers debug with oc logs dc/my-app and collaborate with admins for cluster issues.

• Check logs with oc describe dc.
• Validate in test project.
• Monitor with Prometheus.
• Fix configs or code.

This shows real-time troubleshooting expertise.

13. Which resources define real-time apps?

• DeploymentConfig for live updates.
• Service for internal networking.
• Route for external access.
• Validate in test project.
• Monitor with Prometheus.
• Use ConfigMaps for settings.

This demonstrates real-time app setup skills.

14. How do you fix real-time deployment failures?

A deployment fails in production. Check logs with oc logs dc/my-app. Verify image and config with oc describe dc/my-app. Revert with oc rollback dc/my-app. Validate in a test project to show real-time troubleshooting skills.

15. What is the role of OpenShift’s web console in real-time?

• Provides UI for live app management.
• Visualizes running deployments.
• Supports route and service creation.
• Validate in test project.
• Monitor with console dashboards.
• Simplifies developer tasks.

Developers need UI for live tasks, supporting interviews.

16. Why secure real-time app configs?

Configs expose sensitive data in production. Use Secrets for API keys and ConfigMaps for non-sensitive data. Apply with oc create secret generic my-secret. Restrict via RBAC. Validate in a test project to show real-time security skills.

17. How do you optimize real-time deployments?

• Use Rolling strategy for zero downtime.
• Configure triggers for live updates.
• Validate in test project.
• Monitor with Prometheus.
• Reduce image sizes.
• Ensure network efficiency.

Deployments are slow in production, showing optimization skills.

18. Which strategies ensure real-time reliability?

Deployments fail intermittently in production. Use health checks in DeploymentConfig and validate image streams. Monitor with Prometheus for trends.

• Configure liveness/readiness probes.
• Validate in test project.
• Monitor deployment status.
• Ensure stable networking.

This ensures reliable live deployments.

Real-Time CI/CD

19. What is a BuildConfig in real-time CI/CD?

• Defines live build processes.
• Supports S2I and Docker builds.
• Uses triggers for automation.
• Integrates with Git repositories.
• Validates in test project.
• Monitors with Prometheus.

BuildConfigs streamline real-time CI/CD for interviews.

20. Why use Source-to-Image for real-time builds?

S2I automates image creation from source code, enabling rapid live builds. It uses builder images to compile and deploy. Compared to manual builds, it simplifies workflows. Validate in a test project to show real-time CI/CD skills.

21. When do you configure real-time build triggers?

• Set triggers for live Git commits.
• Configure via oc set triggers bc/my-build.
• Support CI/CD automation.
• Validate in test project.
• Monitor with Prometheus.
• Ensure pipeline efficiency.

Builds need automation in production, showing CI/CD expertise.

22. Where do you store real-time build artifacts?

Store artifacts in OpenShift’s integrated registry using oc registry login. Push images with oc tag. Validate in a test project for live availability. Monitor with oc describe is/my-image to show real-time CI/CD skills.

23. Who designs real-time CI/CD pipelines?

• Developers design with DevOps.
• Use BuildConfigs and Tekton.
• Configure via oc create pipeline.
• Validate in test project.
• Monitor with Prometheus.
• Ensure team alignment.

Teams need live pipelines, showing collaboration skills.

24. Which tools enhance real-time CI/CD?

Pipelines need automation in production. Use Tekton for Kubernetes-native pipelines and Jenkins for legacy CI/CD. Integrate with Git.

• Configure Tekton pipelines.
• Validate in test project.
• Monitor with Prometheus.
• Automate with triggers.

This shows real-time CI/CD expertise.

25. How do you troubleshoot real-time build failures?

• Check logs with oc logs bc/my-build.
• Verify BuildConfig syntax.
• Inspect repository access.
• Validate in test project.
• Monitor with Prometheus.
• Use diagnostic scripts.

A build fails in production, showing troubleshooting skills.

26. What causes real-time build timeouts?

Builds fail due to timeouts in production. Increase timeout in BuildConfig with oc edit bc/my-build. Validate in test project and monitor with Prometheus to show CI/CD skills.

27. Why do builds fail repository access in real-time?

• Missing Git credentials in BuildConfig.
• Add secrets with oc create secret.
• Verify repository URL.
• Validate in test project.
• Monitor with Prometheus.
• Ensure network access.

Builds cannot fetch code live, showing troubleshooting expertise.

28. When do you use Docker builds in real-time?

Use Docker builds for custom images when S2I is insufficient. Define Dockerfile in the repository and configure BuildConfig. Validate in a test project for live image creation. Monitor with oc describe bc/my-build to show real-time build skills.

29. Where do you debug real-time build failures?

• Use oc logs bc/my-build for errors.
• Check BuildConfig triggers.
• Verify repository access.
• Validate in test project.
• Monitor with Prometheus.
• Use diagnostic tools.

Builds fail unexpectedly in production, showing debugging skills.

30. Who resolves real-time pipeline failures?

A pipeline stalls in production. Developers debug with oc logs pipeline/my-pipeline and collaborate with DevOps for fixes. Monitor with Prometheus.

• Validate in test project.
• Check pipeline stages.
• Ensure resource availability.
• Monitor execution.

This shows real-time teamwork skills.

31. Which metrics track real-time pipeline health?

• Monitor build success in Prometheus.
• Track build duration live.
• Analyze with scripts.
• Validate in test project.
• Monitor pipeline efficiency.
• Automate alerts.

This demonstrates real-time observability skills.

32. How do you automate real-time pipeline triggers?

Pipelines need automation in production. Configure triggers in BuildConfig with oc set triggers bc/my-build. Integrate with Git webhooks. Validate in a test project to show real-time CI/CD skills.

33. What causes pipeline resource exhaustion in real-time?

• Insufficient CPU for live builds.
• Increase limits in BuildConfig YAML.
• Check with oc describe bc/my-build.
• Validate in test project.
• Monitor with Prometheus.
• Optimize resource usage.

Builds fail due to resources, showing troubleshooting skills.

34. Why use Tekton for real-time CI/CD?

Tekton provides Kubernetes-native pipelines for live automation. It supports reusable tasks. Configure via oc apply -f pipeline.yaml and validate in a test project. Monitor with Prometheus to show real-time CI/CD expertise.

35. When do you integrate Jenkins in real-time?

• Use for legacy pipeline compatibility.
• Deploy Jenkins via OpenShift template.
• Configure with oc new-app jenkins.
• Validate in test project.
• Monitor with Prometheus.
• Ensure pipeline automation.

Legacy CI/CD is needed live, showing integration skills.

Real-Time Networking

36. What is a Route in real-time OpenShift?

• Exposes services to live traffic.
• Uses HAProxy for load balancing.
• Configure with oc expose svc/my-service.
• Supports TLS termination.
• Validates in test project.
• Monitors with Prometheus.

Routes ensure external access for interviews.

37. Why use secure routes in real-time?

• Protect live traffic with TLS.
• Configure edge termination.
• Apply with oc create route edge.
• Validate in test project.
• Monitor with Prometheus.
• Ensure security compliance.

Apps need secure live access, showing security skills.

38. When do you configure network policies in real-time?

Configure network policies to restrict live pod communication via oc apply -f policy.yaml. Validate in a test project to ensure secure networking. Monitor with Prometheus to show real-time networking skills.

39. Where do you manage real-time route configs?

• Use oc edit route/my-route.
• Configure in OpenShift Web Console.
• Adjust TLS or path-based routing.
• Validate in test project.
• Monitor with Prometheus.
• Ensure route accessibility.

Routes need live customization, showing networking expertise.

40. Who manages real-time route access?

Admins configure RBAC for routes with oc adm policy add-role-to-user to restrict live access. Validate in a test project and monitor with Prometheus to show real-time security skills.

41. Which tools troubleshoot real-time route issues?

• Use oc describe route/my-route.
• Run curl for access tests.
• Analyze with networking tools like tcpdump.
• Validate in test project.
• Monitor with Prometheus.
• Automate diagnostics.

Routes are inaccessible in production, showing troubleshooting skills.

42. How do you secure a route in real-time?

A route exposes sensitive data in production. Configure edge termination with oc create route edge --cert my-cert.pem. Validate in a test project.

• Monitor with Prometheus.
• Ensure certificate validity.
• Check route accessibility.
• Update firewall rules.

This shows real-time secure networking.

43. What causes route timeouts in real-time?

• Misconfigured timeout in route YAML.
• Check with oc describe route/my-route.
• Adjust timeout settings.
• Validate in test project.
• Monitor with Prometheus.
• Ensure service availability.

Users report live timeouts, showing troubleshooting skills.

44. Why does a service lack external access in real-time?

A service is unreachable in production. The route is missing or misconfigured. Create with oc expose svc/my-service. Verify service selector. Validate in a test project to show networking skills.

45. When do you use path-based routing in real-time?

• Use for apps sharing live domains.
• Configure in route YAML with path.
• Apply with oc apply -f route.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Ensure routing accuracy.

Apps share a domain in production, showing routing expertise.

46. Where do you monitor real-time route traffic?

Monitor route metrics in Prometheus via Cluster Monitoring Operator. Analyze with Grafana dashboards. Validate in test project to show real-time networking skills.

47. Who resolves real-time route config errors?

• Admins fix route settings.
• Check with oc describe route/my-route.
• Update YAML for corrections.
• Validate in test project.
• Monitor with Prometheus.
• Collaborate with developers.

Routes fail to route live traffic, showing troubleshooting expertise.

48. Which steps secure a route with RBAC in real-time?

Unauthorized route access occurs in production. Configure RBAC with oc adm policy add-role-to-user view user1 -n my-project. Validate in a test project.

• Monitor with Prometheus.
• Ensure least privilege.
• Check audit logs.
• Validate access controls.

This shows real-time security skills.

49. How do you handle real-time route performance?

• Check Prometheus for latency metrics.
• Adjust route timeout settings.
• Optimize backend service.
• Validate in test project.
• Monitor with Grafana.
• Scale pods if needed.

Routes are slow in production, showing performance expertise.

50. What causes a route to fail in real-time?

A route is inaccessible in production. Check configuration with oc describe route/my-route. Verify service selector and backend health. Validate in a test project and monitor with Prometheus to show networking skills.

51. Why use network policies in real-time?

• Restrict live pod-to-pod communication.
• Define rules in networkpolicy.yaml.
• Apply with oc apply -f policy.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Enhance app security.

Apps need live isolation, showing networking expertise.

52. When do you configure load balancing in real-time?

Use load balancing for high-traffic routes in production, configured in route YAML with round-robin. Validate in a test project. Monitor with Prometheus to show real-time load balancing skills.

Real-Time Storage

53. What is a Persistent Volume Claim in real-time?

• Requests live storage for apps.
• Defines size and access mode.
• Binds to Persistent Volumes.
• Apply with oc apply -f pvc.yaml.
• Validates in test project.
• Monitors with Prometheus.

PVCs ensure live data persistence for interviews.

54. Why does a pod fail to mount a PVC in real-time?

A pod cannot access storage in production. The PVC is misconfigured or PV is unavailable. Check with oc describe pvc/my-pvc. Verify storage class. Validate in a test project to show storage skills.

55. When do you use dynamic provisioning in real-time?

• Use for live PV creation.
• Configure storage class in PVC.
• Apply with oc apply -f pvc.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Ensure storage scalability.

Storage needs automation in production, showing storage expertise.

56. Where do you configure storage classes in real-time?

Define storage classes in YAML for live provisioning. Apply with oc apply -f storageclass.yaml. Validate in test project to show real-time storage management skills.

57. Who manages real-time PVC configs?

• Admins configure PVCs for apps.
• Collaborate with developers for needs.
• Apply with oc apply -f pvc.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Ensure data persistence.

Apps need live storage, showing storage expertise.

58. Which storage types support stateful apps in real-time?

A database needs storage in production. Use block storage (e.g., Ceph RBD) or NFS. Configure via storage class. Validate in a test project to show real-time storage skills.

59. How do you troubleshoot real-time storage issues?

• Check oc describe pvc/my-pvc.
• Verify storage class and PV.
• Inspect pod events with oc describe pod.
• Validate in test project.
• Monitor with Prometheus.
• Use diagnostic scripts.

Pods cannot mount storage in production, showing troubleshooting skills.

60. What causes PVC binding failures in real-time?

A PVC fails to bind in production. Check storage class and PV availability with oc describe pvc/my-pvc. Ensure capacity. Validate in a test project and monitor with Prometheus to show storage skills.

61. Why use volume snapshots in real-time?

• Create live backups for apps.
• Configure via snapshot YAML.
• Apply with oc apply -f snapshot.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Ensure data recovery.

Data needs live backups, showing storage expertise.

62. When do you expand PVCs in real-time?

Expand PVCs when storage runs low in production, using oc edit pvc/my-pvc to increase capacity. Validate in a test project to show real-time storage management skills.

63. Where do you store real-time volume snapshots?

• Store in live storage backend.
• Configure via storage class.
• Apply with oc apply -f snapshot.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Ensure snapshot availability.

Backups need live storage, showing storage skills.

64. Who resolves real-time PVC mounting issues?

Admins debug with oc describe pvc/my-pvc and ensure PV availability in production. Validate in a test project. Monitor with Prometheus to show real-time storage troubleshooting skills.

65. Which tools manage real-time storage?

• Use storage classes for provisioning.
• Configure with oc apply -f storageclass.yaml.
• Integrate with Ceph or NFS.
• Validate in test project.
• Monitor with Prometheus.
• Automate storage setup.

Storage needs live management, showing storage expertise.

66. How do you automate real-time storage provisioning?

Storage needs automation in production. Use storage classes and integrate with cloud providers like AWS EBS.

• Validate in test project.
• Monitor with Prometheus.
• Ensure storage scalability.
• Apply with oc apply.

This shows real-time automation skills.

67. What causes storage performance issues in real-time?

• Low IOPS in storage backend.
• Check with oc describe pvc/my-pvc.
• Upgrade storage class performance.
• Validate in test project.
• Monitor with Prometheus.
• Optimize volume settings.

Storage is slow in production, showing troubleshooting skills.

68. Why does a pod lose data in real-time?

Data disappears after pod restart in production. The PVC is not mounted or uses ephemeral storage. Verify with oc describe pod/my-pod. Configure PVC in YAML. Validate in a test project to show storage skills.

69. When do you use StatefulSets in real-time?

• Use for stateful apps like databases.
• Configure with oc apply -f statefulset.yaml.
• Ensure stable pod identities.
• Validate in test project.
• Monitor with Prometheus.
• Support data persistence.

Databases need live Kubernetes, showing application expertise.

Real-Time Monitoring

70. What is Prometheus in real-time OpenShift?

• Monitors live cluster metrics.
• Integrated via Cluster Monitoring Operator.
• Visualizes with Grafana dashboards.
• Validates in test project.
• Sets live alerts.
• Ensures observability.

Prometheus enhances real-time monitoring for interviews.

71. Why do pods fail with CrashLoopBackOff in real-time?

• App errors cause live failures.
• Check logs with oc logs my-pod.
• Verify container image settings.
• Validate in test project.
• Monitor with Prometheus.
• Fix code or config.

Pods keep crashing in production, showing debugging skills.

72. When do you use oc debug in real-time?

• Access pod shell for live debugging.
• Run oc debug pod/my-pod.
• Diagnose runtime issues.
• Validate in test project.
• Monitor with Prometheus.
• Ensure quick resolution.

Pods fail unexpectedly in production, showing debugging expertise.

73. Where do you view real-time app logs?

• Use oc logs my-pod for live logs.
• Access via OpenShift Web Console.
• Integrate with EFK stack.
• Validate in test project.
• Monitor with Prometheus.
• Ensure log availability.

Logs are needed for live debugging, showing logging expertise.

74. Who debugs real-time app failures?

• Developers debug with oc logs.
• Collaborate with admins for issues.
• Use oc describe pod for events.
• Validate in test project.
• Monitor with Prometheus.
• Fix code or configs.

Apps fail in production, showing troubleshooting expertise.

75. Which tools enhance real-time monitoring?

• Use Prometheus for live metrics.
• Integrate Grafana for visualization.
• Configure EFK for logging.
• Validate in test project.
• Monitor with alerts.
• Automate metric collection.

Visibility is needed in production, showing observability skills.

76. How do you handle real-time high latency?

Users report slow responses in production. Check Prometheus for latency metrics. Optimize code or scale pods with oc scale dc/my-app. Validate in a test project.

• Monitor with Prometheus.
• Ensure performance stability.
• Optimize network settings.

This shows real-time performance troubleshooting.

77. What causes missing logs in real-time?

• Misconfigured EFK stack.
• Check with oc describe pod/my-pod.
• Configure log forwarding.
• Validate in test project.
• Monitor with Prometheus.
• Fix logging settings.

Logs are unavailable in production, showing logging skills.

78. Why use liveness probes in real-time?

• Ensure pods run correctly live.
• Configure in DeploymentConfig YAML.
• Apply with oc apply -f dc.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Prevent app failures.

Pods need live health checks, showing reliability expertise.

79. When do you use readiness probes in real-time?

• Ensure pods are ready for live traffic.
• Configure in DeploymentConfig YAML.
• Apply with oc apply -f dc.yaml.
• Validate in test project.
• Monitor with Prometheus.
• Prevent downtime.

Apps need live readiness, showing reliability skills.

80. Where do you analyze real-time performance?

• Use Prometheus for live metrics.
• Visualize with Grafana dashboards.
• Check with oc adm top pod.
• Validate in test project.
• Monitor with alerts.
• Ensure performance visibility.

Performance issues occur in production, showing observability skills.

81. Who monitors real-time app alerts?

• Admins set Prometheus alerts.
• Configure via Cluster Monitoring Operator.
• Integrate with PagerDuty.
• Validate in test project.
• Monitor with Grafana.
• Ensure alert reliability.

Alerts indicate live issues, showing monitoring expertise.

82. Which steps fix real-time pod crashes?

• Check logs with oc logs my-pod.
• Verify resource limits.
• Fix app code or configs.
• Validate in test project.
• Monitor with Prometheus.
• Scale pods if needed.

Pods crash repeatedly in production, showing debugging skills.

83. How do you implement real-time zero-downtime deployments?

Deployments cause outages in production. Use Rolling strategy in DeploymentConfig. Configure maxSurge and maxUnavailable. Validate in a test project to show deployment expertise.

84. What causes high CPU usage in real-time?

• Insufficient pod resource limits.
• Check with oc adm top pod.
• Adjust limits in DeploymentConfig.
• Validate in test project.
• Monitor with Prometheus.
• Optimize app code.

Pods consume excessive CPU in production, showing troubleshooting skills.

85. Why integrate Prometheus in real-time?

• Provides live app metrics.
• Configure via Cluster Monitoring Operator.
• Visualize with Grafana dashboards.
• Validate in test project.
• Monitor with alerts.
• Enhance observability.

Metrics are needed in production, showing monitoring expertise.

Real-Time Cluster Management

86. What is OpenShift’s cluster architecture in real-time?

• Consists of master and worker nodes.
• Masters manage live API and etcd.
• Workers run live pods.
• Uses Kubernetes for orchestration.
• Validates in test cluster.
• Monitors with Prometheus.

This ensures live scalability for interviews.

87. Why perform real-time cluster health checks?

• Ensure live node availability.
• Check with oc get clusteroperators.
• Monitor resources with Prometheus.
• Validate in test cluster.
• Prevent live downtime.
• Support cluster stability.

Cluster performance degrades in production, showing reliability skills.

88. When do you scale cluster nodes in real-time?

Scale nodes when workloads spike in production. Use oc adm manage-node or MachineSets for dynamic scaling. Validate in a test cluster to ensure capacity. Monitor with Prometheus to show real-time scaling skills.

89. Where do you store real-time cluster configs?

• Store in etcd for live persistence.
• Back up with oc adm backup etcd.
• Access via oc commands.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure backup integrity.

Configs need live recovery, showing cluster management skills.

90. Who resolves real-time cluster issues?

• Admins debug with oc get nodes.
• Collaborate with developers for fixes.
• Use oc adm node-logs for errors.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure stability.

Nodes fail in production, showing troubleshooting expertise.

91. Which tools automate real-time cluster tasks?

• Use Ansible for live node setup.
• Terraform for infrastructure automation.
• Configure with oc adm.
• Validate in test cluster.
• Monitor with Prometheus.
• Automate scaling.

Cluster needs live automation, showing automation skills.

92. How do you handle real-time node failures?

A node is unreachable in production. Check status with oc get nodes. Drain with oc adm drain and replace via MachineSets. Validate in a test cluster to show real-time recovery skills.

93. What causes etcd failures in real-time?

• Storage or network issues.
• Check with oc adm inspect etcd.
• Restore from backups.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure etcd stability.

etcd fails in production, showing troubleshooting skills.

94. Why use Operators in real-time?

• Automate live component management.
• Configure via OperatorHub.
• Support upgrades and scaling.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure efficiency.

Components need live automation, showing Operator expertise.

95. When do you back up etcd in real-time?

Back up etcd before live upgrades or maintenance using oc adm backup etcd. Validate in a test cluster to ensure data recovery. Monitor with Prometheus to show real-time backup skills.

96. Where do you monitor real-time cluster health?

Use Prometheus for live metrics via Cluster Monitoring Operator. Analyze with Grafana dashboards. Validate in test cluster to show real-time monitoring skills.

97. Who performs real-time cluster upgrades?

• Admins initiate live upgrades.
• Use oc adm upgrade --to=version.
• Collaborate with developers for compatibility.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure minimal downtime.

Cluster needs live updating, showing administrative expertise.

98. Which steps minimize real-time upgrade downtime?

Upgrades cause outages in production. Use rolling upgrades and pre-test in a test cluster. Monitor with oc get clusteroperators. Validate to show real-time upgrade skills.

99. How do you automate real-time cluster maintenance?

• Use Ansible for live node patching.
• Schedule with oc adm drain.
• Integrate with Prometheus alerts.
• Validate in test cluster.
• Monitor with Grafana.
• Ensure minimal disruption.

Maintenance needs live automation, showing automation expertise.

100. What causes real-time node maintenance failures?

• Pod eviction issues during drain.
• Check with oc describe node.
• Adjust pod disruption budgets.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure node stability.

Node drain fails in production, showing maintenance skills.

101. Why perform real-time cluster backups?

• Protect against live data loss.
• Back up etcd with oc adm backup.
• Store in secure external storage.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure data recovery.

Cluster risks live data loss, showing backup expertise.

102. When do you drain nodes in real-time?

Drain nodes during live maintenance or upgrades using oc adm drain node-name. Validate in a test cluster to minimize disruption. Monitor with Prometheus to show real-time maintenance skills.

103. Where do you check real-time upgrade status?

• Use oc get clusteroperators for progress.
• Check logs in OpenShift Web Console.
• Monitor with Prometheus dashboards.
• Validate in test cluster.
• Ensure upgrade completion.
• Track operator status.

Upgrade status is unclear in production, showing monitoring expertise.