Networking and Storage Configuration Flashcards

Which command displays all Neutron agents running in the deployment and their alive status?

Answer: openstack network agent list

openstack network agent list is the unified CLI command that shows all Neutron agents with their host, type, and alive flag.

In Swift, what is the maximum recommended size of a single object before it should be split into a large object?

Answer: 5 GB

Swift recommends splitting objects larger than 5 GB into segments using Static or Dynamic Large Object support.

Which Cinder option configures the minimum free space percentage that must remain on a storage backend before it stops accepting new volumes?

Answer: reserved_percentage

reserved_percentage tells Cinder to keep that fraction of backend capacity free and report it as unavailable for scheduling.

What Neutron feature allows a single physical network interface to carry multiple tenant networks using 802.1Q tags?

Answer: VLAN provider network

VLAN provider networks use 802.1Q tagging to isolate multiple tenant networks over one physical interface.

Which command attaches a Cinder volume to a running Nova instance using the OpenStack CLI?

Answer: openstack server add volume

openstack server add volume triggers the Nova compute API to attach the Cinder volume to the specified instance.

Which Neutron ML2 mechanism driver is commonly used with Open vSwitch for overlay networks?

Answer: openvswitch

The openvswitch ML2 mechanism driver integrates with the OVS agent to provide VXLAN/GRE overlay and VLAN networks.

In Ceph-backed Cinder, which CRUSH rule parameter determines how replicas are distributed across failure domains?

Answer: crush_rule

crush_rule specifies the CRUSH rule name or ID that controls replica placement across OSDs, hosts, or racks.