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| Section | Objectives |
|---|---|
| Troubleshooting and Maintenance | - Diagnose VM and cluster issues - Monitor virtualization workloads |
| Migration and Operations | - Perform VM migration within OpenShift clusters - Manage VM snapshots and backups |
| Virtual Machine Lifecycle Management | - Start, stop, and modify VM resources - Create and manage virtual machines |
| Storage and Networking for Virtual Machines | - Configure persistent storage for VMs - Configure VM networking and connectivity |
| OpenShift Virtualization Installation and Configuration | - Deploy OpenShift Virtualization operators and components - Configure cluster prerequisites for virtualization workloads |
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NEW QUESTION # 21
How do you expose an HTTP application running inside a VM via ClusterIP?
Answer:
Explanation:
See the Explanation.
Explanation:
1. Ensure VM is running a web server (e.g., Apache on port 80).
2. Create a ClusterIP service:
ports:
- protocol: TCP
port: 80
targetPort: 80
3. Use selector: kubevirt.io/domain: <vm-name>
4. From another pod: curl http://vm-service.default.svc.cluster.local
5. Confirm HTTP response.
NEW QUESTION # 22
How do you back up a virtual machine disk by exporting a PVC?
Answer:
Explanation:
See the Explanation.
Explanation:
1. Snapshot PVC using CSI snapshot (if enabled).
2. Export PVC using rsync/restic/Velero or by cloning to backup namespace.
3. For manual backup: use kubectl cp or mount PVC to a pod and archive.
4. Store off-cluster if required.
5. Reimport later into new DV.
NEW QUESTION # 23
How do you resize a VM disk using PVC expansion?
Answer:
Explanation:
See the Explanation.
Explanation:
1. Ensure the storage class supports allowVolumeExpansion.
2. Run:
oc patch pvc vm-root-disk -p '{"spec": {"resources": {"requests": {"storage": "15Gi"}}}}'
3. Restart the VM.
4. Resize partition inside the OS using growpart or resize2fs.
5. Confirm disk size with df -h.
NEW QUESTION # 24
How do you debug if the VM is not responding through the service?
Answer:
Explanation:
See the Explanation.
Explanation:
1. Check VM status: oc get vm, vmi
2. Get pod IP and log in: oc rsh <virt-launcher>
3. Verify service port is open: ss -lntp
4. Check service endpoints: oc get ep vm-service
5. Review VM firewall settings (e.g., firewalld or iptables).
NEW QUESTION # 25
How do you verify which VMs will be affected by draining a specific node?
Answer:
Explanation:
See the Explanation.
Explanation:
1. Run:
oc get vmi -o wide | grep <node-name>
2. Or:
oc get pods -A -o wide | grep virt-launcher | grep <node>
3. List all associated VMs.
4. Migrate or shut them down before draining.
5. Prevents unexpected disruption.
NEW QUESTION # 26
......
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