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From: Charalampos Kominos <Charalampos.Kominos@enea.com>
Date: Wed, 2 May 2018 14:20:47 +0200
Subject: [PATCH] Allow libvirt to honor root device naming
Current behaviour in upstream nova is for rootfs to be in /dev/vda
which is the default behaviour when using virtio driver. However when
other devices are requested either by glance or by CLI, nova ignores
that naming and still tries to attach to vda which fails.
Manually applied in https://review.openstack.org/#/c/214314/
JIRA: ARMBAND-376
Signed-off-by: Charalampos Kominos <charalampos.kominos@enea.com>
---
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -8257,6 +8257,8 @@
"Ignoring supplied device name: %(device_name)s. "
"Libvirt can't honour user-supplied dev names",
{'device_name': bdm.device_name}, instance=instance)
+ if instance.root_device_name == bdm.device_name:
+ instance.root_device_name = None
bdm.device_name = None
block_device_info = driver.get_block_device_info(instance,
block_device_mapping)
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