Here are the 50 practical scenarios on how to manage containers in linux that can help you prepare for the RHSA (Red Hat Certified System Administrator) exam:
Container Basics:
1. Install Docker or Podman on a system.
2. Verify the installation and version of Docker/Podman.
3. Start the Docker/Podman service and enable it to start at boot.
4. Check the status of the container runtime service.
5. Search for an official Docker image on Docker Hub or a Podman image on Quay.io.
6. Pull a specific version of an image from a container registry.
7. List locally available container images.
8. Remove a container image from the local system.
Container Management:
9. Run a container with a specific name and specified ports.
10. Start, stop, and restart a running container.
11. Execute a command inside a running container.
12. View the logs of a running container.
13. Attach to a running container’s shell.
14. Remove a stopped container.
15. Create a Dockerfile or Podmanfile to define a custom container image.
16. Build a custom container image from a Dockerfile/Podmanfile.
17. Push a custom container image to a container registry.
Container Networking:
18. Create a custom Docker bridge network.
19. Run a container within a custom bridge network.
20. Inspect the network settings of a running container.
21. Publish container ports to specific host ports.
22. Create a custom Podman network namespace.
23. Attach a running container to a custom network.
24. Expose a container’s ports using network namespaces.
Storage and Volumes:
25. Create a Docker volume to persist container data.
26. Mount a host directory as a volume in a container.
27. View a list of Docker volumes on the system.
28. Remove a Docker volume.
29. Mount a named volume in a Podman container.
30. Copy files between the host and a mounted volume.
31. Backup and restore data from a named volume.
Container Security:
32. Check for available security updates for container images.
33. Scan a container image for vulnerabilities using a tool like Trivy or Clair.
34. Configure Podman to run containers with a specific user.
35. Implement resource limits (CPU, memory) for a container.
36. Apply SELinux labels to a container.
Container Orchestration:
37. Install and configure Docker Compose (Docker) or Podman Compose (Podman).
38. Create a Docker Compose or Podman Compose file to define a multi-container application.
39. Deploy a multi-container application using Compose.
40. Scale the number of containers in a Compose application.
41. Update and redeploy a Compose application.
Container Registry:
42. Set up a local container registry using Docker Distribution or Podman’s built-in registry.
43. Push a custom container image to a local registry.
44. Configure Docker or Podman to use a custom registry.
45. Pull an image from a custom registry.
46. Secure a container registry using TLS certificates.
Container Troubleshooting:
47. Identify and resolve common container-related issues, such as port conflicts or resource constraints.
48. Check container logs for error messages.
49. Inspect a container’s metadata and settings.
50. Troubleshoot network connectivity problems within a container.
