OpenStack is a cloud operating system that controls large pools of compute,storage, and networking resources throughout a datacenter, all managed through a dashboard that gives administrators control while empowering their users to provision resources through a web interface.
This is called OpenStack compute service. Nova is responsible for interacting with hypervisors and provisioning compute resources. Nova provides services for resource management through its API. This API facilitates launching and managing virtual instances.
This is OpenStack Image service. This service is useful to look up and use images for virtual instances. It provides services through an API that facilitates managing image library, discovering and retrieving virtual images.
Neutron is responsible for OpenStack software-defined networking services. Neutron enables tenants to create multiple private networks and provides capabilities for managing static IPs, DHCP and VLANs.
Swift is responsible for OpenStack object storage. It allows tenants to store and retrieve files. Cinder is responsible for providing block storage or volume storage to virtual instances. Cinder along with Swift can be used to back up volumes of virtual instances. Cinder API is useful for manipulating volumes and volume snapshots.
OpenStack’s Keystone handles authentication, policy management and catalog services. The Keystone is responsible for tenant registrations, tenant authentication and granting authorization tokens. Keystone API or Identity API is useful for granting authentication tokens.
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