To support rolling upgrades, capping of RPC communication and Ironic
objects is required. Old RPC services and objects may still be running
while an upgrade is in progress. This makes sure that these old
services are called and all objects are used in a supported RPC and
objects version.
This patch adds the configuration option "pin_release_version". Setting
this option caps (downgrades) the internal RPC communication to the
specified version to enable communication with older services. When
doing a rolling upgrade from version X to Y, set this to X. It defaults
to using the newest (current) possible RPC behavior and object versions.
Change-Id: Ie2342d4051f85392a8b10d39ebffc287da57bf2b
Partial-Bug: #1526283
Co-Authored-By: Szymon Borkowski <szymon.borkowski@intel.com>
Co-Authored-By: Ruby Loo <ruby.loo@intel.com>
9bc06783ec