COA OpenStack CLI & Dashboard Operations Flashcards

What does the `openstack server pause` command do to an instance?

Answer: Freezes the instance's CPU execution while keeping its memory state intact

`openstack server pause` halts CPU execution for the instance while preserving its memory state, allowing it to be quickly resumed without rebooting.

Which CLI command displays detailed resource information about a specific Nova compute hypervisor?

Answer: openstack hypervisor show

`openstack hypervisor show` displays detailed information about a compute node including allocated vCPUs, memory, disk, and running instance count.

What is the correct CLI syntax to create a Cinder volume snapshot?

Answer: openstack volume snapshot create --volume

`openstack volume snapshot create --volume ` creates a point-in-time snapshot of a Cinder volume usable for backup or volume cloning.

How do you add a custom metadata property to a Glance image using the unified OpenStack CLI?

Answer: openstack image set --property key=value

`openstack image set --property` adds or updates custom key-value metadata on a Glance image, usable by Nova scheduler filters or other services.

Which CLI command injects a new admin password into a running instance without requiring SSH access?

Answer: openstack server set --password

`openstack server set --password` uses the Nova guest agent to inject a new root or administrator password into a running instance.

What information does `openstack catalog list` display?

Answer: Service types and their endpoint URLs for all registered OpenStack services

`openstack catalog list` shows all service types and their corresponding API endpoint URLs registered in the Keystone service catalog.