Detailed introduction to the main components and functions of openstack

The main components are: 1. Keystone, authentication management service; 2. Nova, management of computing resources; 3. Glance, storage, query and retrieval functions of virtual machine images; 4. Swift, high-availability distributed Object storage service; 5. Cinder, manages all block storage devices, etc.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

keystone (identity service module), its function is: authentication management service, providing the management, creation, modification, etc. of authentication information/tokens of all other components.

Nova (computing service component), its role is: management of computing resources, management of instance life cycle (virtual machine), and providing external Restful API communication.

Glance (image service component), its role is to: provide storage, query and retrieval functions of virtual machine images, serve nova, and rely on storage services (storage images itself) and the database service (which stores mirroring-related data).

Swift (object storage service module) is used to provide highly available distributed object storage services, which are characterized by unlimited expansion and no single point of failure.

Cinder (Block Storage Service Module) Its role: manages all block storage devices and provides storage services for virtual machines.

Neutorn (network service component) its role: to provide virtual network functions for cloud computing and establish an independent network environment for each different tenant.

The role of Ceilometer (monitoring service component) is to provide a unified resource usage data collection function for upper-layer billing, settlement or monitoring applications.

Horizon (console service) is used to provide management of all services of all nodes in the form of a Web. This service is usually called Dashboard.

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