What is Openstack Cinder ?

OpenStack Cinder is an open-source block storage service that is part of the OpenStack cloud computing platform. It provides persistent storage for virtual machines and containers in a multi-tenant environment. Cinder enables users to manage and attach block storage volumes to their instances, allowing for flexible storage management and allocation within an OpenStack deployment.

Key Features of OpenStack Cinder:

  1. Volume Management: Cinder allows users to create, delete, and manage block storage volumes independently from virtual machines or containers. Volumes can be dynamically attached or detached from instances as needed, providing flexibility in storage management.
  2. Snapshot and Backup: Cinder supports the creation of point-in-time snapshots of volumes, which can be used for data backup, cloning, or migration purposes. Snapshots are incremental, capturing only the changes made since the last snapshot, reducing storage requirements. Users can also create volume backups to external storage devices or object storage services.
  3. Volume Types and QoS: Cinder supports the creation of different volume types, each with its own characteristics such as performance, availability, and reliability. This allows users to tailor their storage requirements to specific applications or workloads. Additionally, Cinder provides Quality of Service (QoS) capabilities to assign performance characteristics to volumes, ensuring predictable performance levels.
  4. Volume Encryption: Cinder offers data-at-rest encryption for volumes to protect sensitive data. Encryption can be enabled on a per-volume basis, and Cinder supports a variety of encryption methods and key management options.
  5. Multi-Backend Support: Cinder supports multiple storage backends, allowing users to integrate with various storage technologies such as traditional SANs (Storage Area Networks), network-attached storage (NAS) systems, and distributed file systems. This enables users to leverage their existing storage infrastructure or choose the most suitable backend for their needs.
  6. Integration with OpenStack Services: Cinder integrates with other OpenStack services, such as Nova (compute), Glance (image), and Keystone (identity), to provide a comprehensive storage solution within the OpenStack ecosystem. For example, users can boot instances from volumes, create volume-backed images, or authenticate storage operations using Keystone.
  7. API and CLI: Cinder provides a RESTful API and a command-line interface (CLI) for managing storage resources. These interfaces allow users to interact with Cinder programmatically and automate storage operations.

Modules of Openstack Cinder :-

  1. cinder-api
  2. cinder-scheduler
  3. cinder-volume
  4. cinder-backup

Overall, OpenStack Cinder plays a crucial role in providing scalable and flexible block storage services in OpenStack deployments. It enables users to efficiently manage storage resources, ensure data protection, and integrate with other OpenStack components to deliver a robust cloud computing environment.

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