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OpenStack has several shared services that span the three pillars of compute, storage and networking, making it easier to implement and operate your cloud. These services — including identity, image management and a web interface — integrate the OpenStack components with each other as well as external systems to provide a unified experience for users as they interact with different cloud resources.
OpenStack Identity provides a central directory of users mapped to the OpenStack services they can access. It acts as a common authentication system across the cloud operating system and can integrate with existing backend directory services like LDAP. It supports multiple forms of authentication including standard username and password credentials, token-based systems and AWS-style logins.
Additionally, the catalog provides a queryable list of all of the services deployed in an OpenStack cloud in a single registry. Users and third-party tools can programmatically determine which resources they can access.
As an administrator, OpenStack Identity enables you to:
As a user, OpenStack Identity enables you to:
The OpenStack Image Service provides discovery, registration and delivery services for disk and server images. The ability to copy or snapshot a server image and immediately store it away is a powerful capability of the OpenStack cloud operating system. Stored images can be used as a template to get new servers up and running quicklyand more consistently if you are provisioning multiple serversthan installing a server operating system and individually configuring additional services. It can also be used to store and catalog an umlimited number of backups.
The Image Service can store disk and server images in a variety of back-ends, including OpenStack Object Storage. The Image Service API provides a standard REST interface for querying information about disk images and lets clients stream the images to new servers.
Capabilities of the Image Service include:
A multi-format image registry, the image service allows uploads of private and public images in a variety of formats, including:
The OpenStack Telemetry service aggregates usage and performance data across the services deployed in an OpenStack cloud. This powerful capability provides visibility and insight into the usage of the cloud across dozens of data points and allows cloud operators to view metrics globally or by individual deployed resources.
OpenStack Orchestration is a template-driven engine that allows application developers to describe and automate the deployment of infrastructure. The flexible template language can specify compute, storage and networking configurations as well as detailed post-deployment activity to automate the full provisioning of infrastructure as well as services and applications. Through integration with the Telemetry service, the Orchestration engine can also perform auto-scaling of certain infrastructure elements.