I ran the helm install without any issues:
> helm list
NAME NAMESPACE REVISION UPDATED STATUS CHART APP VERSION
myrelease kafka 1 2020-05-18 12:34:17.448554945 +0530 IST deployed airflow-6.2.2 1.10.10
> kubectl get pv,pvc -n kafka
NAME CAPACITY ACCESS MODES RECLAIM POLICY STATUS CLAIM STORAGECLASS REASON AGE
persistentvolume/pvc-dedbb5f6-844d-4e34-8eae-21e8187afd24 8Gi RWO Delete Bound kafka/data-myrelease-postgresql-0 local-path 2m12s
persistentvolume/pvc-22222462-1a42-476a-a5dc-5fd0dc6a6e6b 8Gi RWO Delete Bound kafka/redis-data-myrelease-redis-slave-0 local-path 2m10s
persistentvolume/pvc-c1c216a3-92e6-4c88-bd1c-670fe25c3c12 8Gi RWO Delete Bound kafka/redis-data-myrelease-redis-master-0 local-path 2m10s
persistentvolume/pvc-535672be-64c0-4551-99b0-9cc0ca8fbbd1 8Gi RWO Delete Bound kafka/redis-data-myrelease-redis-slave-1 local-path 83s
NAME STATUS VOLUME CAPACITY ACCESS MODES STORAGECLASS AGE
persistentvolumeclaim/data-myrelease-postgresql-0 Bound pvc-dedbb5f6-844d-4e34-8eae-21e8187afd24 8Gi RWO local-path 2m19s
persistentvolumeclaim/redis-data-myrelease-redis-slave-0 Bound pvc-22222462-1a42-476a-a5dc-5fd0dc6a6e6b 8Gi RWO local-path 2m19s
persistentvolumeclaim/redis-data-myrelease-redis-master-0 Bound pvc-c1c216a3-92e6-4c88-bd1c-670fe25c3c12 8Gi RWO local-path 2m19s
persistentvolumeclaim/redis-data-myrelease-redis-slave-1 Bound pvc-535672be-64c0-4551-99b0-9cc0ca8fbbd1 8Gi RWO local-path 92s
I believe you might not have a storageClass
to provision a PVC for the PV requested by your PostgreSQL pod.
Refer: https://github.com/bitnami/charts/blob/master/bitnami/airflow/values.yaml#L9