Backing services are any processes that the App contacts over the network during its operation. In traditional operating systems, these services could have been accessed over the network, a UNIX socket, or could even be a sub-process. Examples include:
- Databases (e.g. MySQL, PostgreSQL, Cloud Spanner)
- File storage (e.g. NFS, FTP, Cloud Filestore)
- Logging services (e.g. syslog endpoints, Cloud Logging)
- Traditional HTTP APIs (e.g. Google Maps, WikiData, Parcel Tracking APIs)
Connecting to backing services over the network rather than installing them all into the same machine allows developers to focus on their App, independent security upgrades for different components, and flexibility to swap implementations.
Backing services in Kf
Kf supports two major types of backing services:
- Managed services
- These services are created by a service broker and are tied to the Kf cluster
- User-provided services
- These services are created outside of Kf, but get bound to it externally