Done :

* Checking distribution el8 configuration...
 -> Checking cloud config...
Creating tag  : cloud8-openstack-wallaby-candidate
Creating tag  : cloud8-openstack-wallaby-testing
Creating tag  : cloud8-openstack-wallaby-release
 -> creating cloud8-openstack-wallaby-el8
Added external repo centos8-cr to tag cloud8-openstack-wallaby-el8-build (priority 5)
Added external repo centos8-extras to tag cloud8-openstack-wallaby-el8-build (priority 10)
Added external repo centos8-powertools to tag cloud8-openstack-wallaby-el8-build (priority 15)
Added external repo centos8-appstream to tag cloud8-openstack-wallaby-el8-build (priority 20)
Added external repo centos8-baseos to tag cloud8-openstack-wallaby-el8-build (priority 25)

Thanks @arrfab , can u check following misses. -testing tag missing from inheritance, Also can u add HA as external repo like other openstack releases https://cbs.centos.org/koji/taginfo?tagID=2076

$ cbs list-tag-inheritance cloud8-openstack-wallaby-el8-build
cloud8-openstack-wallaby-el8-build (2165)
├─buildsys8-release (1886)
└─cloud8-openstack-wallaby-candidate (2162)

we need tag inheritance for wallaby like we do have for victoria.

$ cbs list-tag-inheritance cloud8-openstack-victoria-el8-build
cloud8-openstack-victoria-el8-build (2076)
├─buildsys8-release (1886)
├─cloud8-openstack-victoria-candidate (2073)
└─cloud8-openstack-victoria-testing (2074)

May be these things are missing in automation?

Well, you never mentioned that in the request , so no way to guess it :)
So, can you confirm that you just need :
* ha

I don't understand the dep on testing for el8-build as it goes like this : candidate (relying on el8-build for builds) and then promotion to -testing and then -release

Here is what is configured now :

cbs taginfo cloud8-openstack-wallaby-el8-build
Tag: cloud8-openstack-wallaby-el8-build [2165]
Arches: x86_64 aarch64 ppc64le
Groups: build, srpm-build
Tag options:
  mock.new_chroot : 1
  mock.package_manager : 'dnf'
This tag is a buildroot for one or more targets
Current repo: repo#491568: 2020-09-17 11:24:08.438640
Targets that build from this tag:
  cloud8-openstack-wallaby-el8
External repos:
    5 centos8-cr (http://mirror.centos.org/centos/8//cr/$arch/os/)
   10 centos8-extras (http://mirror.centos.org/centos/8//extras/$arch/os/)
   15 centos8-powertools (http://mirror.centos.org/centos/8//PowerTools/$arch/os/)
   20 centos8-appstream (http://mirror.centos.org/centos/8//AppStream/$arch/os/)
   25 centos8-baseos (http://mirror.centos.org/centos/8//BaseOS/$arch/os/)
   30 centos8-ha (http://mirror.centos.org/centos/8/HighAvailability/$arch/os/)
Inheritance:
  5    .... buildsys8-release [1886]
  10   .... cloud8-openstack-wallaby-candidate [2162]
  15   .... cloud8-openstack-wallaby-testing [2163]

If that's ok, just ack and I'll close ticket again, but next time don't forget to mention what is needed ;-)

Here is what is configured now :
cbs taginfo cloud8-openstack-wallaby-el8-build Tag: cloud8-openstack-wallaby-el8-build [2165] Arches: x86_64 aarch64 ppc64le Groups: build, srpm-build Tag options: mock.new_chroot : 1 mock.package_manager : 'dnf' This tag is a buildroot for one or more targets Current repo: repo#491568: 2020-09-17 11:24:08.438640 Targets that build from this tag: cloud8-openstack-wallaby-el8 External repos: 5 centos8-cr (http://mirror.centos.org/centos/8//cr/$arch/os/) 10 centos8-extras (http://mirror.centos.org/centos/8//extras/$arch/os/) 15 centos8-powertools (http://mirror.centos.org/centos/8//PowerTools/$arch/os/) 20 centos8-appstream (http://mirror.centos.org/centos/8//AppStream/$arch/os/) 25 centos8-baseos (http://mirror.centos.org/centos/8//BaseOS/$arch/os/) 30 centos8-ha (http://mirror.centos.org/centos/8/HighAvailability/$arch/os/) Inheritance: 5 .... buildsys8-release [1886] 10 .... cloud8-openstack-wallaby-candidate [2162] 15 .... cloud8-openstack-wallaby-testing [2163]

If that's ok, just ack and I'll close ticket again, but next time don't forget to mention what is needed ;-)

@arrfab Yes please update as per ^ and close the ticket. I thought some automation adds other repos and HA will be included automatically as we have that added in other releases.

Keep an action on me to update el8 buildroot to depend on -ha automatically.