Here’s a list of 100 basic concepts, features, and tasks that you should explore to deepen your understanding of OpenShift v4 (2023 Guidelines):

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Core Concepts

1. What is OpenShift? – Understanding OpenShift as a Kubernetes distribution.
2. Pods – Basic units of deployment in Kubernetes.
3. Containers vs Pods – Differences and how they work together.
4. ReplicaSets – Ensuring a specified number of pod replicas run at a time.
5. Deployments – Managing Pod and ReplicaSet updates.
6. StatefulSets – Managing stateful applications.
7. DaemonSets – Running a pod on every cluster node.
8. Jobs and CronJobs – Running tasks once or periodically.
9. Services – An abstract way to expose an application running on a set of Pods.
10. Ingress – Managing external access to services.
11. Routes – OpenShift-specific way to external access.
12. Namespaces – Partitioning cluster resources.
13. Labels and Selectors – Organizing resources using labels.
14. Annotations – Non-identifying metadata.
15. ConfigMaps – Managing configuration data.
16. Secrets – Storing sensitive information.
17. Resource Quotas – Limiting resource use per namespace.
18. Limit Ranges – Restricting resource allocation.
19. Volume Management – Persistent storage options.
20. Persistent Volumes (PVs) and Persistent Volume Claims (PVCs) – Persistent storage resources.
21. Storage Classes – Dynamic provisioning of storage.
22. Security Contexts – Managing permissions and access.
23. Role-Based Access Control (RBAC) – User and group permissions.
24. Service Accounts – Processes identity within the cluster.
25. Network Policies – Controlling network access to Pods.

OpenShift-Specific Features

26. Operator Framework – Automating application management.
27. Source-to-Image (S2I) – Building container images from source code.
28. Templates – Defining sets of objects for easy deployment.
29. Image Streams – Managing and updating container images.
30. BuildConfigs and Builds – Automating image builds.
31. DeploymentConfigs – Advanced deployment features.
32. Router – Routing external traffic.
33. Registry – Integrated container registry.
34. Monitoring and Logging – Integrated tools for monitoring and logging.
35. OpenShift Console – Web-based interface.
36. CLI Tools – oc command-line tool.
37. Projects – Enhanced Kubernetes namespaces.
38. Quotas and Limit Ranges – Resource management in projects.

Installation and Setup

39. Installation Methods – Installer-provisioned vs user-provisioned.
40. Cluster Architecture – Understanding master and worker nodes.
41. Prerequisites for Installation – Hardware and software requirements.