From 85e94cef77dbf0b0e464f43f4f6de447a0274dd6 Mon Sep 17 00:00:00 2001 From: Matt Riedemann Date: Thu, 6 Jul 2017 12:38:30 -0400 Subject: [PATCH] Add release note for xenapi virt device tagging support Nova change I565617e05acf33e6254ea091b88d975270ffde05 added the support for creating a server with tagged VIFs and BDMs with the xenapi driver, but did not contain a release note. This adds the release note, and much of the text is copied from Tempest change I9fe520bc9b68d0bc7f879617f2cd27dd1029e4de. Part of blueprint virt-device-role-tagging-xenapi Change-Id: I330087944203ab6aa9cf64fd4d3f1909ce44b435 --- ...-device-role-tagging-5ffb440f75fae834.yaml | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 releasenotes/notes/xenapi-virt-device-role-tagging-5ffb440f75fae834.yaml diff --git a/releasenotes/notes/xenapi-virt-device-role-tagging-5ffb440f75fae834.yaml b/releasenotes/notes/xenapi-virt-device-role-tagging-5ffb440f75fae834.yaml new file mode 100644 index 000000000000..ebc8143d4964 --- /dev/null +++ b/releasenotes/notes/xenapi-virt-device-role-tagging-5ffb440f75fae834.yaml @@ -0,0 +1,20 @@ +--- +features: + - | + The ``XenAPI`` compute driver now supports creating servers with virtual + interface and block device tags which was introduced in the ``2.32`` + microversion. + + Note that multiple paths will exist for a tagged disk for the following + reasons: + + 1. HVM guests may not have the paravirtualization (PV) drivers installed, + in which case the disk will be accessible on the ``ide`` bus. When the + PV drivers are installed the disk will be accessible on the ``xen`` bus. + 2. Windows guests with PV drivers installed expose devices in a different + way to Linux guests with PV drivers. Linux systems will see disk paths + under ``/sys/devices/``, but Windows guests will see them in the + registry, for example ``HKLM\System\ControlSet001\Enum\SCSIDisk``. These + two disks are both on the ``xen`` bus. + + See the following XenAPI documentation for details: http://xenbits.xen.org/docs/4.2-testing/misc/vbd-interface.txt