Difference between revisions of "TripleO/TuskarGlossary"
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Revision as of 14:35, 26 September 2013
Overview
Tuskar is built with Triple-O in mind; as such, it may be useful to familiarize yourself with the Triple-O architecture.
* Names marked with an asterisk may change in the future
Resource Class
A Resource Class can be thought of as a cloud 'building block'. It consists of a set of Racks, and defines the services provided by the Nodes in those Racks.
Tuskar supports four Resource Class types:
- Controller Class Class that provides all services other than compute and storage services
- Compute Class Class that defines and provides compute services
- Object Storage Class Class that defines and provides object storage services
- Block Storage Class Class that defines and provides block storage service
Overcloud Flavor
An Overcloud Flavor is a virtual hardware configuration. Its definition is aligned with the "instance_type" (aka 'Flavor') used in the OpenStack Nova API.
Overcloud Flavors are defined for a given Compute Resource Class and semantically describe the types of compute instances that can be launched for that Resource Class. Each Overcloud Flavor has a set of Capacities that describe a particular aspect of the virtual hardware configuration, such as cpu, memory or storage.
When a Node is provisioned, the Overcloud Flavors that are defined for that Node's Resource Class are registered in Nova,
Resource (Rack and Node)
There are two kinds of Resources:
- Node A Node is a single physical compute unit. It corresponds to a compute Node in Nova Baremetal (and eventually, in Ironic).
- Rack A Rack is a physical or logical grouping of Nodes. It can be thought of as a server rack in a datacenter. A Rack is assigned to a Resource Class, and can be managed as a single unit.
There are two types of Racks:
- Controller Rack A Rack that belongs to a Controller Resource Class.
- Resource Rack A Rack that belongs to a Compute/Object Storage/Block Storage Resource Class.
Image
An Image is provisioned on Nova Baremetal Nodes.
