downgrade the version requirement of qemu from 4.2.0 to 4.1.0

0001-downgrade-the-version-of-qemu-from-4.2.0-to-4.1.0.patch

@@ -0,0 +1,50 @@
+From f399e11607bbd74cc39760ead9c29122f22c2b6a Mon Sep 17 00:00:00 2001
+From: FFrog <ljw1101.vip@gmail.com>
+Date: Tue, 7 Sep 2021 15:44:00 +0800
+Subject: [PATCH] downgrade the version of qemu from 4.2.0 to 4.1.0
+
+---
+ nova/virt/libvirt/driver.py | 20 ++++++++++++++++++--
+ 1 file changed, 18 insertions(+), 2 deletions(-)
+
+diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
+index 8ee8757..865ecb7 100644
+--- a/nova/virt/libvirt/driver.py
++++ b/nova/virt/libvirt/driver.py
+@@ -213,7 +213,7 @@ patch_tpool_proxy()
+ #
+ # DO NOT FORGET to update this document when touching any versions below!
+ MIN_LIBVIRT_VERSION = (6, 0, 0)
+-MIN_QEMU_VERSION = (4, 2, 0)
++MIN_QEMU_VERSION = (4, 1, 0)
+ NEXT_MIN_LIBVIRT_VERSION = (7, 0, 0)
+ NEXT_MIN_QEMU_VERSION = (5, 2, 0)
+ 
+@@ -2092,7 +2092,23 @@ class LibvirtDriver(driver.ComputeDriver):
+                 guest.delete_configuration(support_uefi)
+ 
+             try:
+-                dev.copy(conf.to_xml(), reuse_ext=True)
++                # NOTE(lyarwood): Use virDomainBlockCopy from libvirt >= 6.0.0
++                # and QEMU >= 4.2.0 with -blockdev domains allowing QEMU to
++                # copy to remote disks.
++                if self._host.has_min_version(lv_ver=MIN_LIBVIRT_BLOCKDEV,
++                                              hv_ver=MIN_QEMU_BLOCKDEV):
++                    dev.copy(conf.to_xml(), reuse_ext=True)
++                else:
++                    # TODO(lyarwood): Remove the following use of
++                    # virDomainBlockRebase once MIN_LIBVIRT_VERSION hits >=
++                    # 6.0.0 and MIN_QEMU_VERSION hits >= 4.2.0.
++                    # Start copy with VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT flag to
++                    # allow writing to existing external volume file. Use
++                    # VIR_DOMAIN_BLOCK_REBASE_COPY_DEV if it's a block device
++                    # to make sure XML is generated correctly (bug 1691195)
++                    copy_dev = conf.source_type == 'block'
++                    dev.rebase(conf.source_path, copy=True, reuse_ext=True,
++                               copy_dev=copy_dev)
+ 
+                 while not dev.is_job_complete():
+                     time.sleep(0.5)
+-- 
+2.27.0
+

openstack-nova.spec

@@ -17,13 +17,15 @@ Name:             openstack-nova
 # Liberty semver reset
 # https://review.openstack.org/#/q/I6a35fa0dda798fad93b804d00a46af80f08d475c,n,z
 Version:          23.0.1
-Release:          3
+Release:          4
 Summary:          OpenStack Compute (nova)
 
 License:          ASL 2.0
 URL:              http://openstack.org/projects/compute/
 Source0:          https://tarballs.openstack.org/nova/nova-%{upstream_version}.tar.gz
 
+Patch0:           0001-downgrade-the-version-of-qemu-from-4.2.0-to-4.1.0.patch
+
 
 Source1:          nova-dist.conf
 Source6:          nova.logrotate
@@ -395,7 +397,7 @@ This package contains documentation files for nova.
 %endif
 
 %prep
-%autosetup -n nova-%{upstream_version}
+%autosetup -n nova-%{upstream_version} -p1
 
 find . \( -name .gitignore -o -name .placeholder \) -delete
 
@@ -727,6 +729,9 @@ exit 0
 %endif
 
 %changelog
+* Tue Sep 07 2021 ffrog <ljw1101.vip@gmail.com> - 23.0.1-4
+- Downgrade the version requirement of qemu from 4.2.0 to 4.1.0
+
 * Tue Aug 24 2021 huangtianhua <huangtianhua@huawei.com> - 23.0.1-3
 - Fix requires errors