airflow-kustom/base/components/airflow-cnpg-database/resources/airflow-cnpg-cluster.yaml

apiVersion: postgresql.cnpg.io/v1
kind: Cluster
metadata:
  name: airflow-postgres
spec:
  instances: 3
  primaryUpdateStrategy: unsupervised
  superuserSecret:
    name: airflow-postgres-admin
  bootstrap:
    initdb:
      database: airflow
      owner: airflow
      secret:
        name: airflow-postgres-user
  storage:
    size: 2Gi