Exactly. The frameworks that the article describes know how to run say Cassandra or Spark, but you can do the same thing in Kubernetes using TPRs or CRDs with operators:

[0]https://github.com/coreos/prometheus-operator [1]https://github.com/coreos/etcd-operator [2]https://github.com/huawei-cloudfederation/redis-operator [3]https://github.com/CrunchyData/postgres-operator [4]https://github.com/krallistic/kafka-operator [5]https://github.com/pegerto/cassandra-operator