Portal uses currently a customized, old Cassandra Image (cassandra_music:3.0.0).

(from oom/kubernetes/portal/components/portal-cassandra/values.yaml )
image: onap/music/cassandra_music:3.0.0

We shall be using a common Cassandra image for Portal, similar as for other components.
This image doesn`t support IPv4/IPv6 dual-stack, and we are not legally permitted to use such a cassandra image. Thus we need to migrate to a publicly available image.
Initial tests has shown this image:

docker.io/library/cassandra:3.11.9 ... works properly, although, there might be some additional issues to be solved in a configuration of that image, or pre-configuration needed for Portal.

This will most probably be done with an init container starting before core portal-fe/be pods.

Additional hints:

music-cassandra image has some customization to create user/role like below. Additionally, we need to run portal.cql file when Cassandra loads. CREATE ROLE IF NOT EXISTS <CASSUSER> WITH PASSWORD = '<CASSPASS>' AND SUPERUSER = True AND LOGIN = True; ALTER ROLE cassandra WITH PASSWORD = 'SomeLongRandomStringNoonewillthinkof'; We need to make sure this is happening once we start using the new image.