octavia/releasenotes/notes/Octavia-lib-transition-driv...

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---
features:
- |
The Stein release of Octavia introduces the octavia-lib python module.
This library enables provider drivers to integrate easier with the Octavia
API by providing a shared set of coding objects and interfaces.
upgrade:
- |
The Stein release of Octavia adds the driver-agent controller process.
This process is deployed along with the Octavia API process and uses
unix domain sockets for communication between the provider drivers using
octavia-lib and the driver-agent.
When upgrading to Stein, operators should make sure that the
/var/run/octavia directry is available for the driver-agent with the
appropriate ownership and permissions for the driver-agent and API
processes to access it. The operator may need to make sure the driver-agent
process starts after installation. For example, a systemd service may need
to be created and enabled for it.