Thanks for your information.
Actually, I was in doubt of using Ussuri (latest version) for my environment.
Anyway, Undercloud Ussuri installed like a charm on CentOS 8, but overcloud image build got some error:
$ openstack overcloud image build --config-file /usr/share/openstack-tripleo-common/image-yaml/overcloud-images-python3.yaml --config-file /usr/share/openstack-tripleo-common/image-yaml/overcloud-images-centos8.yaml
...
2020-07-14 12:14:22.714 | Running install-packages install.
2020-07-14 12:14:22.714 | + dnf -v -y install python3-aodhclient python3-barbicanclient python3-cinderclient python3-designateclient python3-glanceclient python3-gnocchiclient python3-heatclient python3-ironicclient python3-keystoneclient python3-manilaclient python3-mistralclient python3-neutronclient python3-novaclient python3-openstackclient python3-pankoclient python3-saharaclient python3-swiftclient python3-zaqarclient dpdk driverctl nfs-utils chrony pacemaker-remote cyrus-sasl-scram tuned-profiles-cpu-partitioning osops-tools-monitoring-oschecks aide ansible-pacemaker crudini gdisk podman libreswan openstack-selinux net-snmp numactl iptables-services tmpwatch openssl-perl lvm2 chrony certmonger fence-agents-all fence-virt ipa-admintools ipa-client ipxe-bootimgs nfs-utils chrony pacemaker pcs
2020-07-14 12:14:23.251 | Loaded plugins: builddep, changelog, config-manager, copr, debug, debuginfo-install, download, generate_completion_cache, needs-restarting, playground, repoclosure, repodiff, repograph, repomanage, reposync
2020-07-14 12:14:23.252 | DNF version: 4.2.17
2020-07-14 12:14:23.253 | cachedir: /tmp/yum
2020-07-14 12:14:23.278 | User-Agent: constructed: 'libdnf (CentOS Linux 8; generic; Linux.x86_64)'
2020-07-14 12:14:23.472 | repo: using cache for: AppStream
2020-07-14 12:14:23.493 | AppStream: using metadata from Tue Jul 7 23:25:16 2020.
2020-07-14 12:14:23.495 | repo: using cache for: BaseOS
2020-07-14 12:14:23.517 | BaseOS: using metadata from Tue Jul 7 23:25:12 2020.
2020-07-14 12:14:23.517 | repo: using cache for: extras
2020-07-14 12:14:23.518 | extras: using metadata from Fri Jun 5 00:15:26 2020.
2020-07-14 12:14:23.519 | Last metadata expiration check: 0:30:45 ago on Tue Jul 14 11:43:38 2020.
2020-07-14 12:14:23.767 | Completion plugin: Generating completion cache...
2020-07-14 12:14:23.850 | No match for argument: python3-aodhclient
2020-07-14 12:14:23.854 | No match for argument: python3-barbicanclient
2020-07-14 12:14:23.858 | No match for argument: python3-cinderclient
2020-07-14 12:14:23.862 | No match for argument: python3-designateclient
2020-07-14 12:14:23.865 | No match for argument: python3-glanceclient
2020-07-14 12:14:23.869 | No match for argument: python3-gnocchiclient
2020-07-14 12:14:23.873 | No match for argument: python3-heatclient
2020-07-14 12:14:23.876 | No match for argument: python3-ironicclient
2020-07-14 12:14:23.880 | No match for argument: python3-keystoneclient
2020-07-14 12:14:23.884 | No match for argument: python3-manilaclient
2020-07-14 12:14:23.887 | No match for argument: python3-mistralclient
2020-07-14 12:14:23.891 | No match for argument: python3-neutronclient
2020-07-14 12:14:23.895 | No match for argument: python3-novaclient
2020-07-14 12:14:23.898 | No match for argument: python3-openstackclient
2020-07-14 12:14:23.902 | No match for argument: python3-pankoclient
2020-07-14 12:14:23.906 | No match for argument: python3-saharaclient
2020-07-14 12:14:23.910 | No match for argument: python3-swiftclient
2020-07-14 12:14:23.915 | No match for argument: python3-zaqarclient
2020-07-14 12:14:23.920 | Package nfs-utils-1:2.3.3-31.el8.x86_64 is already installed.
2020-07-14 12:14:23.921 | Package chrony-3.5-1.el8.x86_64 is already installed.
2020-07-14 12:14:23.924 | No match for argument: pacemaker-remote
2020-07-14 12:14:23.929 | No match for argument: osops-tools-monitoring-oschecks
2020-07-14 12:14:23.933 | No match for argument: ansible-pacemaker
2020-07-14 12:14:23.936 | No match for argument: crudini
2020-07-14 12:14:23.942 | No match for argument: openstack-selinux
2020-07-14 12:14:23.953 | No match for argument: pacemaker
2020-07-14 12:14:23.957 | No match for argument: pcs
2020-07-14 12:14:23.961 | Error: Unable to find a match: python3-aodhclient python3-barbicanclient python3-cinderclient python3-designateclient python3-glanceclient python3-gnocchiclient python3-heatclient python3-ironicclient python3-keystoneclient python3-manilaclient python3-mistralclient python3-neutronclient python3-novaclient python3-openstackclient python3-pankoclient python3-saharaclient python3-swiftclient python3-zaqarclient pacemaker-remote osops-tools-monitoring-oschecks ansible-pacemaker crudini openstack-selinux pacemaker pcs
Do you have any idea?