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Version: v2.0.9

Architecture

Positioning​

Provide efficient, stable, secure, low-cost file and image distribution services to be the best practice and standard solution in cloud native architectures.

Features​

  • Based on the multi-feature intelligent scheduling system, it not only improves the download efficiency but also ensures the system stability.
  • By adapting to support different source protocols (HDFS, storage services of various cloud vendors, Maven, YUM, etc.).
  • Support more distribution modes, such as active pull, active push, sync, preheat, etc.
  • Separation between systems, support separate deployment to meet the needs of different scenarios
  • Based on the newly designed P2P protocol framework of grpc, with better efficiency and stability.
  • Customized P2P protocol based on GRPC is efficient and stable.
  • Support user RBAC and multi-tenant isolation.
  • Improve distribution efficiency by dynamically compressing files during distribution.
  • The client supports third-party client integration of Dragonfly's P2P capabilities through the C/S mode.
  • Support features such as task management, data visualization, and control of multiple P2P clusters.
  • Integration with cloud native ecosystem, such as Harbor, Nydus, etc.

Architecture​

arch

Subsystem features​

Manager​

  • Stores dynamic configuration for consumption by seed peer cluster, scheduler cluster and dfdaemon.
  • Maintain the relationship between seed peer cluster and scheduler cluster.
  • Provide async task management features for image preheat combined with harbor.
  • Keepalive with scheduler instance and seed peer instance.
  • Filter the optimal scheduler cluster for dfdaemon.
  • Provides a visual console, which is helpful for users to manage the P2P cluster.

Scheduler​

  • Based on the multi-feature intelligent scheduling system selects the optimal parent peer.
  • Build a scheduling directed acyclic graph for the P2P cluster.
  • Remove abnormal peer based on peer multi-feature evaluation results.
  • In the case of scheduling failure, notice peer back-to-source download.

dfdaemon​

  • Serve gRPC for dfget with downloading feature, and provide adaptation to different source protocols.
  • It can be used as seed peer. Turning on the Seed Peer mode can be used as a back-to-source download peer in a P2P cluster, which is the root peer for download in the entire cluster.
  • Serve proxy for container registry mirror and any other http backend.
  • Download object like via http, https and other custom protocol.