Component: Cloud Controller
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The Cloud Controller provides REST API endpoints for clients to access the system. The Cloud Controller maintains a database with tables for orgs, spaces, services, user roles, and more.
For more information about how the Cloud Controller schedules apps in Cloud Foundry’s older Droplet Execution Agent (DEA) architecture, see the DEA Placement Algorithm topic.
The Cloud Controller database has been tested with Postgres.
The Cloud Controller manages blobstores for the following:
Resources: Files that are uploaded to the Cloud Controller with a unique SHA such that they can be reused without re-uploading the file
App Packages: Unstaged files that represent an application
Droplets: Result of taking an app package, staging it by processing a buildpack, and preparing it to run
Buildpacks: The buildpacks available to stage apps with
Buildpack Cache: Cached artifacts resulting from the staging process
The blobstore uses the Fog Ruby gem in order to use services like Amazon S3, WebDAV, or the NFS filesystem for storage.
Typically, the same blobstore is used to store all five types of blobs, but the Cloud Controller may be configured to use a separate blobstore for each type.
The Cloud Controller interacts with other core components of the Cloud Foundry platform using the NATS message bus. For example, the Cloud Controller uses NATS when performing the following interactions:
- Instructing a cell to stage an application by processes a buildpack for the app and to prepare it to run
- Instructing a cell to start or stop an application
- Receiving information from the Health Manager about applications
- Subscribing to Service Gateways that advertise available services
- Instructing Service Gateways to handle provisioning, unprovisioning, binding, and unbinding operations for services
rspec runs a test suite with the SQLite in-memory database.
Specify a connection string using the
DB_CONNECTION environment variable to
test against Postgres and MySQL. For example:
DB_CONNECTION="postgres://postgres@localhost:5432/ccng" rspec DB_CONNECTION="mysql2://root:password@localhost:3306/ccng" rspec
Travis currently runs three build jobs against SQLite, Postgres, and MySQL.
For more information about how Cloud Foundry aggregates and streams logs and metrics, see the Overview of the Loggregator System topic.Create a pull request or raise an issue on the source for this page in GitHub