最新なRedHat EX316問題集（340題）、真実試験の問題を全部にカバー！

質問 1：
How do you define parameters in a custom VM template?
正解：
See the Explanation.
Explanation:
1. Under parameters:, define values:
- name: NAME
description: Name of the VM
required: true
2. Use valueFrom to substitute in the VM object:
metadata:
name: "${NAME}"
3. Allows dynamic value substitution.
4. Simplifies reuse.
5. Set multiple parameters (CPU, MEMORY, DISK, etc.).

質問 2：
How do you verify the performance of a VM disk (I/O benchmarking)?
正解：
See the Explanation.
Explanation:
1. Access the VM console: virtctl console <vm>
2. Run:
yum install -y fio
fio --name=test --size=1G --rw=randread --bs=4k --iodepth=64 --numjobs=4 --runtime=60
3. Evaluate read/write throughput and IOPS.
4. Test multiple storage classes if needed.
5. Tune disk type for better performance.

質問 3：
How do you create a snapshot of a stopped VM?
正解：
See the Explanation.
Explanation:
1. Stop the VM: virtctl stop test-vm
2. Create the VirtualMachineSnapshot resource (same YAML as Q2).
3. Wait for snapshot completion: oc get vmsnapshot -w
4. Once done, you can restart the VM.
5. Offline snapshots are faster and more consistent.

質問 4：
How do you update a VM's runStrategy using CLI?
正解：
See the Explanation.
Explanation:
1. Run:
oc patch vm <vm-name> --type='merge' -p '{"spec":{"runStrategy":"RerunOnFailure"}}'
2. Confirm update:
oc get vm <vm-name> -o jsonpath='{.spec.runStrategy}'
3. This strategy restarts the VM only on failure.
4. Useful for crash recovery.
5. Avoids restarts on manual shutdown.

質問 5：
How do you reboot the virtual machine from inside the guest OS?
正解：
See the Explanation.
Explanation:
1. Inside
VM: sudo
reboot
2. VM will shut down and restart.
3. From host:
virtctl restart <vm-name>
4. Confirm with oc get vmi
5. Useful during package updates.

質問 6：
How do you verify and update VM boot order after import?
正解：
See the Explanation.
Explanation:
1. Edit VM
YAML:
bootOrder: 1
2. Make sure correct disk has bootOrder set.
3. Remove bootOrder from non-bootable devices.
4. Reapply changes: oc apply -f vm.yaml
5. Restart VM and verify boot.

質問 7：
How do you confirm that OpenShift Virtualization components are healthy after update?
正解：
See the Explanation.
Explanation:
1. Check pods:
oc get pods -n openshift-cnv
2. Validate all are Running or Completed.
3. Check logs:
oc logs <pod-name> -n openshift-cnv
4. Verify version:
oc get kubevirt kubevirt -n openshift-cnv -o jsonpath='{.status.observedVersion}'
5. Monitor cluster activity to ensure stability.