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Product Name
CF
Publisher Page
CloudFoundry
Category
Cloud
Release
TKU 2018-Feb-ADDM-11.3
Change History
CloudFoundry CF - Change History
Reports & Attributes
[CloudFoundry CF - Reports & Attributes]
Publisher Link
CloudFoundry

Product Description

Architecture

The Diego Cell directly manages and maintains Tasks and LRPs with the following components:

  • Rep

    • Maintains a presence record for the Cell in the Consul/Locket
    • Participates in auctions to accept new Tasks and LRP instances
    • Runs Tasks and LRPs by creating a container and then running actions in it
    • Reacts to container events
    • Periodically ensures its set of Tasks and ActualLRPs in the BBS is in sync with the containers actually present on the Cell
    • Manages container allocations against resource constraints on the Cell, such as memory and disk space
    • Streams stdout and stderr from container processes to the metron-agent running on the Cell, which in turn forwards to the Loggregator system
    • Periodically collects container metrics and emits them to Loggregator
    • Forwards app logs, errors, and app and Diego metrics to the Loggregator Doppler component.
  • Route-Emitter

    • Monitors DesiredLRP and ActualLRP states.
    • Periodically emits route registration and unregistration messages for instances running on the local cell.
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