I am trying to setup a postgres pod using minikube. I have the following in my pod config in my deployment

volumeMounts:
            - mountPath: /var/lib/postgresql/data
              name: postgredb
volumes:
    - name: postgredb
      persistentVolumeClaim:
        claimName: postgres-pv-claim

but when I run I get

initdb: error: directory "/var/lib/postgresql/data" exists but is not empty
It contains a dot-prefixed/invisible file, perhaps due to it being a mount point.
Using a mount point directly as the data directory is not recommended.
Create a subdirectory under the mount point.

so I change to

volumeMounts:
        - mountPath: /var/lib/postgresql/data
          name: postgredb
          subPath: db

But then I get...

2021-02-19 03:53:24.760 UTC [30] LOG:  could not link file "pg_wal/xlogtemp.30" to "pg_wal/000000010000000000000001": Operation not permitted
2021-02-19 03:53:24.761 UTC [30] FATAL:  could not open file "pg_wal/000000010000000000000001": No such file or directory

This is on OSX using minikube, how do I get it to work?

I also tried

      env:
        - name: PGDATA
          value: /var/lib/postgresql/data/db_data
      envFrom:
        - configMapRef:
            name: db-config
      volumeMounts:
        - mountPath: /var/lib/postgresql/data
          name: postgredb
          subPath: db_data

But still get

2021-02-19 03:53:24.760 UTC [30] LOG:  could not link file "pg_wal/xlogtemp.30" to "pg_wal/000000010000000000000001": Operation not permitted
2021-02-19 03:53:24.761 UTC [30] FATAL:  could not open file "pg_wal/000000010000000000000001": No such file or directory