export OS_YAML="/usr/share/openstack-tripleo-common/image-yaml/overcloud-images-centos8.yaml"
export DIB_YUM_REPO_CONF="/etc/yum.repos.d/delorean* /etc/yum.repos.d/tripleo-centos-*"
export STABLE_RELEASE="wallaby"
openstack overcloud image build --config-file /usr/share/openstack-tripleo-common/image-yaml/overcloud-images-python3.yaml --config-file $OS_YAML

...

2021-05-26 18:14:45.815 | ERROR:root:overcloud-base has no valid mapping for package openssl-perl
2021-05-26 18:14:46.543 | INFO:root:Mapping for overcloud-base : lvm2
2021-05-26 18:14:46.554 | ERROR:root:overcloud-base has no valid mapping for package lvm2
2021-05-26 18:14:47.241 | INFO:root:Mapping for overcloud-base : sysstat
2021-05-26 18:14:47.933 | INFO:root:Mapping for overcloud-ceph-storage : chrony_package
2021-05-26 18:14:48.645 | Running install-packages install.

....

....

2021-05-26 18:15:02.588 | Error:
2021-05-26 18:15:02.589 |  Problem: conflicting requests
2021-05-26 18:15:02.589 |   - nothing provides pacemaker-libs(x86-64) = 2.0.5-9.el8 needed by pacemaker-remote-2.0.5-9.el8.x86_64
2021-05-26 18:15:02.592 | (You could try using --skip-broken to work around the problem or --nobest to use more than the best choice package)
2021-05-26 18:15:11.699 | INFO diskimage_builder.block_device.blockdevice [-] State already cleaned - no way to do anything here
Exception occured while running the command
Traceback (most recent call last):
 File "/usr/lib/python3.6/site-packages/tripleoclient/command.py", line 34, in run
   super(Command, self).run(parsed_args)
 File "/usr/lib/python3.6/site-packages/osc_lib/command/command.py", line 39, in run
   return super(Command, self).run(parsed_args)
 File "/usr/lib/python3.6/site-packages/cliff/command.py", line 185, in run
   return_code = self.take_action(parsed_args) or 0
 File "/usr/lib/python3.6/site-packages/tripleoclient/v1/overcloud_image.py", line 120, in take_action
   manager.build()
 File "/usr/lib/python3.6/site-packages/tripleo_common/image/build.py", line 85, in build
   elements, options, packages, extra_options)
 File "/usr/lib/python3.6/site-packages/tripleo_common/image/image_builder.py", line 140, in build_image
   raise subprocess.CalledProcessError(process.returncode, cmd)
subprocess.CalledProcessError: Command '['disk-image-create', '-a', 'amd64', '-o', './overcloud-full', '-t', 'qcow2', '-p', 'python3-psutil,python3-debtcollector,sos,device-mapper-multipat
h,openstack-heat-agents,os-net-config,jq,python3-dbus', '--min-tmpfs=7', '--mkfs-options', '-s size=4096', 'centos', 'baremetal', 'openvswitch', 'overcloud-agent', 'overcloud-base', 'overc
loud-controller', 'overcloud-compute', 'overcloud-ceph-storage', 'puppet-modules', 'stable-interface-names', 'grub2', 'element-manifest', 'dynamic-login', 'iptables', 'enable-packages-inst
all', 'override-pip-and-virtualenv', 'dracut-regenerate', 'remove-machine-id', 'remove-resolvconf', 'openssh', 'disable-nouveau', 'selinux-permissive', 'interface-names']' returned non-zer
o exit status 1.
Command '['disk-image-create', '-a', 'amd64', '-o', './overcloud-full', '-t', 'qcow2', '-p', 'python3-psutil,python3-debtcollector,sos,device-mapper-multipath,openstack-heat-agents,os-net-
config,jq,python3-dbus', '--min-tmpfs=7', '--mkfs-options', '-s size=4096', 'centos', 'baremetal', 'openvswitch', 'overcloud-agent', 'overcloud-base', 'overcloud-controller', 'overcloud-co
mpute', 'overcloud-ceph-storage', 'puppet-modules', 'stable-interface-names', 'grub2', 'element-manifest', 'dynamic-login', 'iptables', 'enable-packages-install', 'override-pip-and-virtual
env', 'dracut-regenerate', 'remove-machine-id', 'remove-resolvconf', 'openssh', 'disable-nouveau', 'selinux-permissive', 'interface-names']' returned non-zero exit status 1.