최신RedHat Red Hat Certified Specialist in OpenShift Virtualization - EX316무료샘플문제
문제1
How do you install the OADP Operator using the OpenShift Web Console?
How do you install the OADP Operator using the OpenShift Web Console?
정답:
See the Explanation.
Explanation:
1. Go to Operators OperatorHub.
2. Search for OpenShift API for Data Protection (OADP).
3. Click Install, select target namespace (e.g., oadp-operator), and approve defaults.
4. Wait for status Succeeded in Installed Operators.
5. Confirm pods are running: oc get pods -n oadp-operator
Explanation:
1. Go to Operators OperatorHub.
2. Search for OpenShift API for Data Protection (OADP).
3. Click Install, select target namespace (e.g., oadp-operator), and approve defaults.
4. Wait for status Succeeded in Installed Operators.
5. Confirm pods are running: oc get pods -n oadp-operator
문제2
How do you configure migration policies for OpenShift Virtualization?
How do you configure migration policies for OpenShift Virtualization?
정답:
See the Explanation.
Explanation:
1. Create a MigrationPolicy object:
apiVersion: kubevirt.io/v1alpha3
kind: MigrationPolicy
metadata:
name: fast-policy
spec:
selectors:
namespaceSelector:
matchLabels:
policy-group: fast
allowAutoConverge: true
allowPostCopy: true
2. Label target namespaces:
oc label ns <target-ns> policy-group=fast
3. Applies advanced migration controls to selected VMs.
Explanation:
1. Create a MigrationPolicy object:
apiVersion: kubevirt.io/v1alpha3
kind: MigrationPolicy
metadata:
name: fast-policy
spec:
selectors:
namespaceSelector:
matchLabels:
policy-group: fast
allowAutoConverge: true
allowPostCopy: true
2. Label target namespaces:
oc label ns <target-ns> policy-group=fast
3. Applies advanced migration controls to selected VMs.
문제3
How do you test external reachability of a VM via its Multus IP?
How do you test external reachability of a VM via its Multus IP?
정답:
See the Explanation.
Explanation:
1. Get IP via:
oc get pod <virt-launcher> -o json | jq '.metadata.annotations["k8s.v1.cni.cncf.io/networks-status"]'
2. Ping from external system.
3. Ensure firewall allows traffic to VM.
4. Verify return path (routing) exists.
5. Use tcpdump on node interface to debug.
Explanation:
1. Get IP via:
oc get pod <virt-launcher> -o json | jq '.metadata.annotations["k8s.v1.cni.cncf.io/networks-status"]'
2. Ping from external system.
3. Ensure firewall allows traffic to VM.
4. Verify return path (routing) exists.
5. Use tcpdump on node interface to debug.
문제4
How do you prepare the OpenShift cluster for OVA imports using the virt-v2v toolset?
How do you prepare the OpenShift cluster for OVA imports using the virt-v2v toolset?
정답:
See the Explanation.
Explanation:
1. Ensure OpenShift Virtualization and CDI (Containerized Data Importer) are installed.
2. Create a namespace/project: oc new-project ova-import
3. Ensure access to virt-v2v container or CLI utility on the system performing the import.
4. Set up persistent storage and the required storage class.
5. Validate cluster status using: oc get hyperconverged -n openshift-cnv
Explanation:
1. Ensure OpenShift Virtualization and CDI (Containerized Data Importer) are installed.
2. Create a namespace/project: oc new-project ova-import
3. Ensure access to virt-v2v container or CLI utility on the system performing the import.
4. Set up persistent storage and the required storage class.
5. Validate cluster status using: oc get hyperconverged -n openshift-cnv
문제5
How do you automatically create a ClusterIP service with a VM using templates?
How do you automatically create a ClusterIP service with a VM using templates?
정답:
See the Explanation.
Explanation:
1. Use a VM template that includes a label (e.g., app: my-vm)
2. Create a Service YAML that selects that label.
3. Deploy from template and then deploy the service.
4. Both connect seamlessly.
5. Test with curl or ssh.
Explanation:
1. Use a VM template that includes a label (e.g., app: my-vm)
2. Create a Service YAML that selects that label.
3. Deploy from template and then deploy the service.
4. Both connect seamlessly.
5. Test with curl or ssh.
문제6
How do you check if a VM's health probes are affecting service routing?
How do you check if a VM's health probes are affecting service routing?
정답:
See the Explanation.
Explanation:
1. Create a Service pointing to the VM.
2. Run readinessProbe in VM.
3. When readinessProbe fails, run:
oc get endpoints <service-name>
4. VM IP should disappear.
5. Confirms traffic routing is influenced by probe status.
Explanation:
1. Create a Service pointing to the VM.
2. Run readinessProbe in VM.
3. When readinessProbe fails, run:
oc get endpoints <service-name>
4. VM IP should disappear.
5. Confirms traffic routing is influenced by probe status.
문제7
How do you find all ClusterIP services targeting virtual machines?
How do you find all ClusterIP services targeting virtual machines?
정답:
See the Explanation.
Explanation:
1. List all services: oc get svc -A -o wide
2. Filter by label selector in YAML:
oc get svc --selector=kubevirt.io/domain -o wide
3. Optionally search for known port usage (22, 80, 443).
4. Cross-check with running VMs.
5. Use: oc get endpoints for connection info.
Explanation:
1. List all services: oc get svc -A -o wide
2. Filter by label selector in YAML:
oc get svc --selector=kubevirt.io/domain -o wide
3. Optionally search for known port usage (22, 80, 443).
4. Cross-check with running VMs.
5. Use: oc get endpoints for connection info.
문제8
How do you configure DNS for a VM to resolve custom internal domains?
How do you configure DNS for a VM to resolve custom internal domains?
정답:
See the Explanation.
Explanation:
1. Use cloud-init in VM spec to write /etc/resolv.conf:
cloudInitNoCloud:
userData: |
#cloud-config
write_files:
- path: /etc/resolv.conf
content: |
nameserver
10.0.0.10
search internal.local
2. Apply and restart the VM.
3. Test name resolution inside VM.
Explanation:
1. Use cloud-init in VM spec to write /etc/resolv.conf:
cloudInitNoCloud:
userData: |
#cloud-config
write_files:
- path: /etc/resolv.conf
content: |
nameserver
10.0.0.10
search internal.local
2. Apply and restart the VM.
3. Test name resolution inside VM.
문제9
How do you resize the imported VM's root disk?
How do you resize the imported VM's root disk?
정답:
See the Explanation.
Explanation:
1. Ensure PVC is expandable (allowVolumeExpansion: true).
2. Run:
oc patch pvc imported-disk -p '{"spec": {"resources": {"requests": {"storage": "25Gi"}}}}'
3. Inside VM, run growpart and resize2fs.
4. Confirm new disk size with df -h.
5. Used to accommodate new workloads.
Explanation:
1. Ensure PVC is expandable (allowVolumeExpansion: true).
2. Run:
oc patch pvc imported-disk -p '{"spec": {"resources": {"requests": {"storage": "25Gi"}}}}'
3. Inside VM, run growpart and resize2fs.
4. Confirm new disk size with df -h.
5. Used to accommodate new workloads.
문제10
How do you verify that a cloned VM has separate PVCs from the original?
How do you verify that a cloned VM has separate PVCs from the original?
정답:
See the Explanation.
Explanation:
1. List PVCs:
oc get pvc -n <namespace>
2. Match PVC names with cloned VM name (e.g., <clone-vm-name>-rootdisk).
3. Describe:
oc describe pvc <clone-pvc>
4. Confirm the cloneRequest annotation is present.
5. Validate disk content independently.
Explanation:
1. List PVCs:
oc get pvc -n <namespace>
2. Match PVC names with cloned VM name (e.g., <clone-vm-name>-rootdisk).
3. Describe:
oc describe pvc <clone-pvc>
4. Confirm the cloneRequest annotation is present.
5. Validate disk content independently.
문제11
How do you reboot the virtual machine from inside the guest OS?
How do you reboot the virtual machine from inside the guest OS?
정답:
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.
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.
문제12
How do you resize a VM disk using PVC expansion?
How do you resize a VM disk using PVC expansion?
정답:
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.
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.
문제13
How do you clone only specific disks from a multi-disk VM?
How do you clone only specific disks from a multi-disk VM?
정답:
See the Explanation.
Explanation:
1. Identify target disk PVC.
2. Clone that PVC using a DataVolume.
3. In cloned VM YAML, define:
disks:
- name: cloned-
disk disk:
bus: virtio
volumes:
- name: cloned-
disk
dataVolume:
name: <cloned-dv>
4. Leave other disks unmounted or reconfigure.
5. Used for testing or forensic recovery.
Explanation:
1. Identify target disk PVC.
2. Clone that PVC using a DataVolume.
3. In cloned VM YAML, define:
disks:
- name: cloned-
disk disk:
bus: virtio
volumes:
- name: cloned-
disk
dataVolume:
name: <cloned-dv>
4. Leave other disks unmounted or reconfigure.
5. Used for testing or forensic recovery.
문제14
How do you detach a Multus interface from a VM safely?
How do you detach a Multus interface from a VM safely?
정답:
See the Explanation.
Explanation:
1. Stop VM: virtctl stop <vm>
2. Edit VM spec to remove the multus network and bridge interface.
3. Apply change: oc apply -f vm.yaml
4. Start VM: virtctl start <vm>
5. Confirm with ip a that interface is removed.
Explanation:
1. Stop VM: virtctl stop <vm>
2. Edit VM spec to remove the multus network and bridge interface.
3. Apply change: oc apply -f vm.yaml
4. Start VM: virtctl start <vm>
5. Confirm with ip a that interface is removed.
문제15
How do you check the status of a service (e.g., sshd) inside a running VM?
How do you check the status of a service (e.g., sshd) inside a running VM?
정답:
See the Explanation.
Explanation:
1. Access the VM via
console: virtctl console
<vm-name>
2. Authenticate with the VM's user credentials.
3. Run:
systemctl status sshd
4. Look for Active: active (running) status.
5. Use q to exit the status viewer.
Explanation:
1. Access the VM via
console: virtctl console
<vm-name>
2. Authenticate with the VM's user credentials.
3. Run:
systemctl status sshd
4. Look for Active: active (running) status.
5. Use q to exit the status viewer.