Advanced OpenShift Interview Questions for Experienced Professionals [2025]

Advanced Application Deployment

1. What is the role of a custom Operator in app deployment?

• Automates complex app lifecycle management.
• Built with Operator SDK and Go.
• Manages CRDs for app configs.
• Deploys with oc apply -f operator.yaml.
• Ensures secure networking.
• Monitors with Prometheus.

Custom Operators streamline advanced deployments for interviews.

2. Why use Helm charts for advanced app deployments?

Helm charts package complex Kubernetes apps for OpenShift, enabling parameterized deployments. They support versioned releases and rollbacks. Compared to templates, Helm offers reusability across clusters. Validate with helm install my-app ./chart in a test project to show advanced deployment skills.

3. When do you customize DeploymentConfig triggers?

• Use for advanced deployment automation.
• Configure with oc set triggers dc/my-app.
• Support image and config triggers.
• Validate in test project.
• Monitor with Prometheus.
• Ensure zero-downtime updates.

Complex apps need custom triggers, showing advanced deployment expertise.

4. Where do you manage advanced app dependencies?

Manage dependencies in ConfigMaps or Secrets for complex apps. Use oc create configmap my-config for live settings. Validate in a test project to ensure app compatibility. Monitor with oc describe cm/my-config to show advanced configuration skills.

5. Who designs custom app Operators?

• Experienced developers build Operators.
• Use Operator SDK for CRD logic.
• Collaborate with admins for RBAC.
• Validate in test project.
• Monitor with Prometheus.
• Ensure app automation.

Complex apps need custom automation, showing Operator expertise.

6. Which tools enhance advanced app deployments?

Advanced deployments use Ansible for config automation, Helm for packaging, and ArgoCD for GitOps. Apply with oc apply -f app.yaml.

• Validate in test project.
• Monitor with Prometheus.
• Automate with GitOps workflows.
• Ensure app scalability.

This shows advanced deployment expertise.

7. How do you deploy stateful apps with Operators?

• Define CRDs for stateful apps.
• Use Operator SDK for logic.
• Configure PVCs for persistence.
• Validate in test project.
• Monitor with Prometheus.
• Ensure data consistency.

Databases need custom Operators, showing advanced deployment skills.

8. What is the role of CRDs in advanced deployments?

Custom Resource Definitions extend Kubernetes for complex app management. They define custom objects for Operators, enabling automation of stateful apps. Validate with oc apply -f crd.yaml in a test project to show advanced deployment expertise.

9. Why optimize image streams for advanced apps?

• Ensure fast image updates.
• Configure with oc create imagestream.
• Reduce image size for performance.
• Validate in test project.
• Monitor with Prometheus.
• Support rapid deployments.

Apps need optimized live updates, showing performance expertise.

10. When do you use sidecar containers in advanced deployments?

Use sidecars for logging or monitoring in complex apps. Define in pod YAML with multiple containers. Validate in a test project for seamless integration. Monitor with oc describe pod/my-app to show advanced deployment skills.

11. Where do you store advanced app secrets?

• Use Secrets for sensitive data.
• Encrypt with oc create secret.
• Integrate with external vaults.
• Validate in test project.
• Monitor with audit logs.
• Ensure secure access.

Apps need secure configs, showing advanced security skills.

12. Who resolves advanced app failures?

Experienced developers debug complex failures with oc logs dc/my-app and collaborate with admins for cluster issues.

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

Apps fail in production, showing advanced troubleshooting expertise.

13. Which strategies ensure zero-downtime deployments?

• Use Blue-Green or Canary strategies.
• Configure with oc edit dc.
• Validate with traffic splitting.
• Monitor with Prometheus.
• Ensure app availability.
• Automate with Operators.

This demonstrates advanced deployment reliability.

14. How do you debug advanced app crashes?

Apps crash due to misconfigurations. Use oc debug pod/my-app for live inspection. Analyze logs with oc logs and metrics in Prometheus. Validate in a test project to show advanced debugging skills.

15. What is the role of GitOps in advanced deployments?

• Manages apps via Git repositories.
• Uses ArgoCD for sync automation.
• Applies with oc apply -f gitops.yaml.
• Validates in test project.
• Monitors with Prometheus.
• Ensures declarative configs.

GitOps streamlines advanced deployments for interviews.

16. Why use advanced health checks for apps?

Complex apps need custom liveness and readiness probes. Configure in DeploymentConfig YAML for dynamic checks. Apply with oc apply -f dc.yaml. Validate in a test project to ensure reliability. Monitor with Prometheus to show advanced health management.

17. How do you automate advanced app scaling?

• Use HorizontalPodAutoscaler with metrics.
• Configure with oc autoscale dc/my-app.
• Integrate with custom metrics.
• Validate in test project.
• Monitor with Prometheus.
• Ensure resource efficiency.

Apps need dynamic scaling, showing advanced automation skills.

18. Which tools optimize advanced app performance?

Apps perform poorly in production. Use Prometheus for custom metrics and Istio for traffic management. Optimize with oc edit dc/my-app.

• Validate in test project.
• Monitor with Grafana.
• Reduce latency.
• Scale pods dynamically.

This shows advanced performance expertise.

Advanced CI/CD

19. What is the role of Tekton in advanced CI/CD?

• Provides Kubernetes-native pipelines.
• Uses Tasks and Pipelines for automation.
• Configure with oc apply -f pipeline.yaml.
• Validates in test project.
• Monitors with Prometheus.
• Ensures scalable pipelines.

Tekton enhances advanced CI/CD for interviews.

20. Why use custom Tekton tasks for CI/CD?

Custom Tekton tasks enable reusable, complex build workflows. They support advanced testing and deployment automation. Compared to BuildConfigs, they offer flexibility. Validate with oc apply -f task.yaml in a test project to show advanced CI/CD skills.

21. When do you integrate ArgoCD in advanced CI/CD?

• Use for GitOps-driven pipelines.
• Configure with oc apply -f argocd.yaml.
• Sync apps from Git repositories.
• Validate in test project.
• Monitor with Prometheus.
• Ensure pipeline automation.

Pipelines need GitOps automation, showing advanced CI/CD expertise.

22. Where do you store advanced pipeline artifacts?

Store artifacts in OpenShift’s registry or external storage like S3. Configure with oc tag for registry pushes. Validate in a test project for availability. Monitor with oc describe is/my-image to show advanced CI/CD skills.

23. Who designs advanced CI/CD pipelines?

• DevOps engineers design pipelines.
• Use Tekton or Jenkins for automation.
• Collaborate with developers for needs.
• Validate in test project.
• Monitor with Prometheus.
• Ensure pipeline scalability.

Complex pipelines need automation, showing teamwork expertise.

24. Which tools secure advanced CI/CD pipelines?

Pipelines expose sensitive data. Use Secrets for credentials and RBAC for access control. Integrate with vaults.

• Apply with oc create secret.
• Validate in test project.
• Monitor with audit logs.
• Ensure pipeline security.

This shows advanced security expertise.

25. How do you debug advanced pipeline failures?

• Check logs with oc logs pipeline/my-pipeline.
• Verify TaskRun configurations.
• Inspect Git repository access.
• Validate in test project.
• Monitor with Prometheus.
• Use diagnostic scripts.

Tekton pipelines fail in production, showing advanced debugging skills.

26. What causes advanced pipeline bottlenecks?

Pipelines run slowly in production. Increase resource limits in TaskRun YAML with oc edit taskrun/my-taskrun. Validate in test project and monitor with Prometheus to show advanced CI/CD skills.

27. Why do advanced builds fail authentication?

• Missing OAuth tokens in BuildConfig.
• Add secrets with oc create secret.
• Verify repository permissions.
• Validate in test project.
• Monitor with Prometheus.
• Ensure secure access.

Builds cannot access repositories, showing advanced troubleshooting expertise.

28. When do you use custom build strategies?

Use custom strategies for complex builds not supported by S2I. Define in BuildConfig YAML with custom builder images. Validate in a test project for advanced build automation. Monitor with oc describe bc/my-build to show CI/CD expertise.

29. Where do you debug advanced pipeline issues?

• Use oc logs pipeline/my-pipeline.
• Check TaskRun events.
• Verify external service access.
• Validate in test project.
• Monitor with Prometheus.
• Use diagnostic tools.

Pipelines fail unexpectedly, showing advanced debugging skills.

30. Who optimizes advanced CI/CD performance?

DevOps engineers optimize pipelines with parallel tasks and resource tuning. Monitor with Prometheus for bottlenecks.

• Validate in test project.
• Adjust TaskRun resources.
• Ensure pipeline efficiency.
• Monitor execution metrics.

Pipelines need performance tuning, showing advanced optimization skills.

31. Which metrics track advanced pipeline performance?

• Monitor TaskRun duration in Prometheus.
• Track pipeline success rates.
• Analyze with custom metrics.
• Validate in test project.
• Monitor pipeline efficiency.
• Automate alerts.

Pipelines need observability, showing advanced monitoring skills.

32. How do you secure advanced pipeline secrets?

Pipelines expose credentials. Integrate with external vaults like HashiCorp Vault. Configure Secrets with oc create secret generic. Validate in a test project to show advanced security skills.

33. What causes advanced build resource exhaustion?

• High memory usage in builds.
• Check with oc describe bc/my-build.
• Increase limits in BuildConfig.
• Validate in test project.
• Monitor with Prometheus.
• Optimize resource usage.

Builds fail due to resources, showing advanced troubleshooting skills.

34. Why use multi-stage pipelines in advanced CI/CD?

Multi-stage pipelines separate build, test, and deploy phases for complex apps. Configure with Tekton Pipeline YAML. Validate in a test project for efficiency. Monitor with Prometheus to show advanced CI/CD expertise.

35. When do you integrate external registries in advanced CI/CD?

• Use for secure image storage.
• Configure with oc registry login.
• Push images with oc tag.
• Validate in test project.
• Monitor with Prometheus.
• Ensure registry access.

Pipelines need external storage, showing advanced integration skills.

Advanced Networking

36. What is OVN-Kubernetes in advanced OpenShift?

• Advanced CNI for pod networking.
• Supports advanced network policies.
• Configure via Network Operator.
• Validates in test cluster.
• Monitors with Prometheus.
• Ensures scalable networking.

OVN-Kubernetes enhances advanced networking for interviews.

37. Why tune OVN-Kubernetes for performance?

• Optimize for high-traffic apps.
• Adjust MTU and bandwidth settings.
• Configure via oc edit network.operator.
• Validate in test cluster.
• Monitor with Prometheus.
• Reduce network latency.

High traffic causes latency, showing advanced networking expertise.

38. When do you use custom network policies?

Use custom policies for fine-grained traffic control. Define in networkpolicy.yaml with complex selectors. Validate in a test cluster to ensure secure networking. Monitor with Prometheus to show advanced networking skills.

39. Where do you configure advanced route settings?

• Use oc edit route/my-route.
• Configure path-based routing.
• Enable advanced TLS options.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure route performance.

Routes need advanced customization, showing networking expertise.

40. Who manages advanced network security?

Admins configure RBAC and network policies for secure traffic. Apply with oc apply -f policy.yaml. Validate in a test cluster and monitor with Prometheus to show advanced security skills.

41. Which tools debug advanced network issues?

• Use oc describe pod for errors.
• Run tcpdump for packet analysis.
• Integrate with Istio for observability.
• Validate in test cluster.
• Monitor with Prometheus.
• Automate diagnostics.

Network fails in production, showing advanced debugging skills.

42. How do you implement advanced load balancing?

High-traffic routes need balancing. Configure weighted routes in YAML and integrate with external load balancers. Validate in a test cluster.

• Monitor with Prometheus.
• Ensure traffic distribution.
• Optimize backend services.
• Update firewall rules.

This shows advanced networking expertise.

43. What causes advanced network latency?

• Misconfigured OVN-Kubernetes settings.
• Check with oc describe network.operator.
• Optimize MTU and routing.
• Validate in test cluster.
• Monitor with Prometheus.
• Use diagnostic tools.

Apps experience delays, showing advanced troubleshooting skills.

44. Why does a route fail advanced TLS termination?

Routes fail secure connections. Check certificate validity with oc describe route/my-route. Update with oc create route edge --cert my-cert.pem. Validate in a test cluster to show advanced networking skills.

45. When do you use Ingress Operators for advanced routing?

• Use for complex routing needs.
• Configure via Ingress Operator.
• Support path-based routing.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure external access.

Apps need advanced routing, showing networking expertise.

46. Where do you monitor advanced network traffic?

Monitor traffic with Prometheus and Istio telemetry. Analyze with Grafana dashboards. Validate in test cluster to show advanced networking skills.

47. Who resolves advanced network policy conflicts?

• Admins fix complex policy overlaps.
• Check with oc describe networkpolicy.
• Update with oc apply -f policy.yaml.
• Validate in test cluster.
• Monitor with Prometheus.
• Minimize policy conflicts.

Policies block critical traffic, showing advanced troubleshooting expertise.

48. Which steps secure advanced routes?

Routes expose sensitive data. Configure mutual TLS with oc create route passthrough. Integrate with network policies.

• Validate in test cluster.
• Monitor with Prometheus.
• Ensure certificate validity.
• Check route access.

This shows advanced security expertise.

49. How do you optimize advanced network performance?

• Adjust OVN-Kubernetes MTU settings.
• Use Istio for traffic management.
• Monitor with Prometheus metrics.
• Validate in test cluster.
• Reduce latency.
• Scale network resources.

Network is slow in production, showing advanced optimization skills.

50. What causes advanced pod network isolation?

Pods cannot communicate. Check complex network policies with oc describe networkpolicy. Adjust rules for selective traffic. Validate in a test cluster and monitor with Prometheus to show advanced networking skills.

51. Why use custom CNI plugins in advanced setups?

• Support specialized networking needs.
• Configure via Network Operator.
• Integrate with external CNI.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure scalability.

Apps need custom networking, showing advanced expertise.

52. When do you configure advanced load balancers?

Use advanced load balancers for high-traffic apps, configured via Ingress Operator with custom algorithms. Validate in a test cluster. Monitor with Prometheus to show advanced load balancing skills.

Advanced Storage

53. What is the role of CSI drivers in advanced storage?

• Enable advanced storage backends.
• Integrate with Ceph or AWS EBS.
• Configure via storage class YAML.
• Apply with oc apply -f storageclass.yaml.
• Validates in test cluster.
• Monitors with Prometheus.

CSI drivers enhance advanced storage for interviews.

54. Why does a PVC fail advanced provisioning?

PVCs fail due to complex storage class misconfigurations. Check with oc describe pvc/my-pvc. Verify CSI driver settings. Validate in a test cluster to show advanced storage skills.

55. When do you use volume snapshots for advanced apps?

• Use for dynamic data backups.
• Configure via CSI snapshot YAML.
• Apply with oc apply -f snapshot.yaml.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure data recovery.

Stateful apps need backups, showing advanced storage expertise.

56. Where do you configure advanced storage classes?

Define storage classes with CSI drivers in YAML. Apply with oc apply -f storageclass.yaml. Validate in test cluster to show advanced storage management skills.

57. Who manages advanced storage configurations?

• Admins configure CSI drivers.
• Collaborate with developers for needs.
• Apply with oc apply -f storageclass.yaml.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure data persistence.

Complex apps need storage, showing advanced expertise.

58. Which storage backends support advanced stateful apps?

Stateful apps need high-performance storage. Use Ceph RBD with CSI or AWS EBS for dynamic provisioning. Validate in a test cluster to show advanced storage skills.

59. How do you troubleshoot advanced storage issues?

• Check oc describe pvc/my-pvc.
• Verify CSI driver configurations.
• Inspect pod events with oc describe pod.
• Validate in test cluster.
• Monitor with Prometheus.
• Use diagnostic scripts.

Pods fail to mount storage, showing advanced troubleshooting skills.

60. What causes advanced storage performance issues?

Storage is slow in production. Check IOPS with oc describe pvc/my-pvc. Optimize CSI driver settings. Validate in a test cluster and monitor with Prometheus to show advanced storage skills.

61. Why use storage encryption in advanced setups?

• Protect sensitive data at rest.
• Configure via CSI driver settings.
• Apply with oc apply -f storageclass.yaml.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure compliance.

Data needs secure storage, showing advanced security expertise.

62. When do you expand advanced PVCs?

Expand PVCs for high-demand apps using oc edit pvc/my-pvc to increase capacity. Validate in a test cluster to show advanced storage management skills.

63. Where do you store advanced volume snapshots?

• Store in CSI-compatible backends.
• Configure via snapshot YAML.
• Apply with oc apply -f snapshot.yaml.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure snapshot availability.

Snapshots need secure storage, showing advanced storage skills.

64. Who resolves advanced PV binding issues?

Admins debug with oc describe pvc/my-pvc and ensure CSI driver compatibility. Validate in a test cluster. Monitor with Prometheus to show advanced storage troubleshooting skills.

65. Which tools manage advanced storage provisioning?

• Use CSI drivers for dynamic provisioning.
• Configure with oc apply -f storageclass.yaml.
• Integrate with Ceph or EBS.
• Validate in test cluster.
• Monitor with Prometheus.
• Automate storage setup.

Storage needs advanced automation, showing expertise.

66. How do you automate advanced storage provisioning?

Storage needs automation in production. Use CSI drivers with AWS EBS and storage classes for dynamic provisioning.

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

This shows advanced automation skills.

67. What causes advanced PV reclaim issues?

• Complex reclaim policies in PVs.
• Check with oc describe pv/my-pv.
• Update policy to Delete/Retain.
• Validate in test cluster.
• Monitor with Prometheus.
• Fix PVC bindings.

PVs cannot be reused, showing advanced troubleshooting skills.

68. Why does a pod fail to mount advanced storage?

PVC misconfiguration or CSI driver issues cause mount failures. Verify with oc describe pvc/my-pvc. Configure storage class. Validate in a test cluster to show advanced storage skills.

69. When do you use StatefulSets with advanced storage?

• Use for complex stateful apps.
• Configure with oc apply -f statefulset.yaml.
• Ensure stable PV bindings.
• Validate in test cluster.
• Monitor with Prometheus.
• Support data persistence.

Databases need advanced storage, showing expertise.

Advanced Monitoring

70. What is the role of custom Prometheus metrics?

• Track app-specific performance.
• Configure via ServiceMonitor YAML.
• Integrate with Cluster Monitoring Operator.
• Validate in test cluster.
• Monitor with Grafana.
• Ensure observability.

Custom metrics enhance advanced monitoring for interviews.

71. Why do advanced apps miss Prometheus metrics?

• Misconfigured ServiceMonitor annotations.
• Check with oc describe servicemonitor.
• Fix pod annotations.
• Validate in test cluster.
• Monitor with Grafana.
• Ensure metric collection.

Metrics are unavailable, showing advanced troubleshooting skills.

72. When do you configure advanced monitoring alerts?

• Create alerts for complex metrics.
• Configure in PrometheusRule YAML.
• Integrate with PagerDuty.
• Validate in test cluster.
• Monitor with Grafana.
• Automate alert rules.

Critical apps need advanced alerts, showing monitoring expertise.

73. Where do you store advanced monitoring data?

• Store metrics in Prometheus.
• Export logs to external EFK.
• Configure via Cluster Logging Operator.
• Validate in test cluster.
• Monitor with Grafana.
• Ensure data retention.

Historical data is needed, showing advanced data management skills.

74. Who configures advanced monitoring dashboards?

• Admins create custom Grafana dashboards.
• Configure via Cluster Monitoring Operator.
• Include app-specific metrics.
• Validate in test cluster.
• Monitor with Prometheus.
• Share with teams.

Dashboards need customization, showing advanced monitoring expertise.

75. Which tools enhance advanced cluster observability?

• Use Prometheus for custom metrics.
• Integrate Istio for traffic insights.
• Configure EFK for advanced logging.
• Validate in test cluster.
• Monitor with Grafana.
• Automate observability.

Clusters need advanced visibility, showing observability expertise.

76. How do you handle advanced monitoring latency?

Monitoring is slow in production. Scale Prometheus pods and optimize retention policies. Validate in a test cluster.

• Monitor with Grafana.
• Ensure performance stability.
• Optimize metric collection.

This shows advanced performance troubleshooting.

77. What causes missing logs in advanced setups?

• Complex EFK misconfigurations.
• Check with oc describe clusterlogging.
• Fix Fluentd or Elasticsearch settings.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure log collection.

Logs are unavailable, showing advanced logging skills.

78. Why use custom log parsers in advanced setups?

• Parse complex app logs.
• Configure in Fluentd settings.
• Visualize with Kibana dashboards.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure log visibility.

Apps need advanced log analysis, showing logging expertise.

79. When do you use log-based metrics in advanced setups?

• Track complex app errors.
• Configure in Prometheus with logs.
• Integrate with EFK stack.
• Validate in test cluster.
• Monitor with Grafana.
• Automate alerts.

Errors need advanced tracking, showing observability skills.

80. Where do you analyze advanced performance metrics?

• Use Prometheus for complex metrics.
• Visualize with custom Grafana dashboards.
• Check with oc adm top nodes.
• Validate in test cluster.
• Monitor with alerts.
• Ensure performance visibility.

Performance issues occur, showing advanced monitoring expertise.

81. Who resolves advanced monitoring failures?

• Admins debug Prometheus/EFK.
• Check with oc describe pod.
• Fix configurations with oc apply.
• Validate in test cluster.
• Monitor with Grafana.
• Ensure observability.

Monitoring fails in production, showing advanced troubleshooting expertise.

82. Which steps optimize advanced monitoring performance?

• Scale Prometheus/EFK pods.
• Optimize metric retention policies.
• Configure efficient ServiceMonitors.
• Validate in test cluster.
• Monitor with Grafana.
• Reduce metric overhead.

Monitoring is slow, showing advanced optimization skills.

83. How do you configure advanced cluster alerts?

Complex apps need custom alerts. Configure PrometheusRule with oc apply -f alert.yaml. Integrate with external notification systems. Validate in a test cluster to show advanced monitoring skills.

84. What causes false alerts in advanced monitoring?

• Incorrect thresholds in Prometheus rules.
• Check with oc describe prometheusrule.
• Adjust alert conditions.
• Validate in test cluster.
• Monitor with Grafana.
• Optimize alert rules.

Alerts trigger unnecessarily, showing advanced troubleshooting skills.

85. Why does EFK fail in advanced logging setups?

• Complex Fluentd or Elasticsearch issues.
• Check with oc describe clusterlogging.
• Fix log forwarding settings.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure log collection.

Logs are missing, showing advanced logging expertise.

Advanced Cluster Management

86. What is multi-cluster management in OpenShift?

• Manages multiple OpenShift clusters.
• Uses Red Hat ACM for orchestration.
• Configure via oc apply -f acm.yaml.
• Validates in test clusters.
• Monitors with Prometheus.
• Ensures centralized control.

Multi-cluster setups enhance scalability for interviews.

87. Why optimize etcd for advanced clusters?

• Improve cluster performance.
• Tune etcd compaction and backups.
• Check with oc adm inspect etcd.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure data consistency.

etcd slows down clusters, showing advanced optimization expertise.

88. When do you use federation in advanced clusters?

Use federation for multi-cluster app deployments with Red Hat ACM. Configure with oc apply -f federation.yaml. Validate in test clusters to ensure synchronization. Monitor with Prometheus to show advanced management skills.

89. Where do you manage advanced cluster policies?

• Use Red Hat ACM for policies.
• Configure with oc apply -f policy.yaml.
• Enforce RBAC and SCC.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure policy compliance.

Clusters need centralized policies, showing advanced management skills.

90. Who manages advanced cluster upgrades?

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

Clusters need advanced upgrades, showing administrative expertise.

91. Which tools automate advanced cluster tasks?

• Use Ansible for complex automation.
• Integrate Red Hat ACM for management.
• Configure with oc adm.
• Validate in test cluster.
• Monitor with Prometheus.
• Automate scaling.

Clusters need automation, showing advanced expertise.

92. How do you handle advanced node failures?

Nodes fail in production. Check with oc get nodes. Drain with oc adm drain and replace via MachineSets. Validate in a test cluster to show advanced recovery skills.

93. What causes advanced etcd corruption?

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

etcd corrupts in production, showing advanced troubleshooting skills.

94. Why use Red Hat ACM for advanced management?

• Centralizes multi-cluster operations.
• Configure via oc apply -f acm.yaml.
• Supports policy enforcement.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure scalability.

Multiple clusters need management, showing advanced expertise.

95. When do you back up advanced clusters?

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

96. Where do you store advanced etcd backups?

• Store in secure external storage.
• Back up with oc adm backup etcd.
• Ensure secure access via RBAC.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure backup availability.

Backups need secure storage, showing advanced backup expertise.

97. Who resolves advanced cluster compatibility issues?

• Senior admins check compatibility.
• Review with oc get clusteroperators.
• Collaborate with developers for fixes.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure app stability.

Apps break post-upgrade, showing advanced troubleshooting expertise.

98. Which steps minimize advanced upgrade downtime?

Upgrades cause outages in production. Use rolling upgrades and pre-test with Red Hat ACM. Monitor with oc get clusteroperators. Validate to show advanced upgrade skills.

99. How do you automate advanced cluster maintenance?

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

Maintenance needs automation, showing advanced expertise.

100. What causes advanced node maintenance failures?

• Complex pod disruption budget issues.
• Check with oc describe node.
• Adjust budgets in YAML.
• Validate in test cluster.
• Monitor with Prometheus.
• Ensure node stability.

Node drain fails, showing advanced maintenance skills.

101. Why use Operators for advanced cluster management?

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

Components need advanced automation, showing Operator expertise.

102. When do you scale advanced clusters?

Scale clusters for high workloads using MachineSets or Red Hat ACM. Validate in a test cluster to ensure capacity. Monitor with Prometheus to show advanced scaling skills.

103. Where do you monitor advanced cluster upgrades?

• 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, showing advanced monitoring expertise.