Instances are virtual machines that run in the cloud. You can launch instances, track their usage, and create snapshots. Start an OpenStack Instance from an ImageWhen you start an instance from an image, OpenStack creates a local copy of the image on the compute node where the instance starts. You can observe OpenStack instances in vSphere as VMs, but you must manage them in OpenStack. Start an OpenStack Instance from a SnapshotYou can start an instance from an instance snapshot. You can observe OpenStack instances in vSphere as VMs, but you can only manage them in OpenStack. Connect to an Instance by Using SSH Track Instance UseYou can track use for instances in each project. You can view instance metrics such as number of vCPUs, disks, RAM, and uptime. Create a Snapshot from an InstanceWith snapshots, you can create new images from running instances. Use Affinity to Control OpenStack Instance PlacementYou can place instances using OpenStack server groups with an affinity or anti-affinity policy. Affinity indicates that all instances in the group must placed on the same host, and anti-affinity indicates that no instances in the group can be placed on the same host.