I have a 1 replica PostgreSQL (alpine:latest) instance running. It works great but every time I do a deployment or every time I scale to 0 then back to 1 pod my database disappears.

When I look in the logs I see that the init scripts in docker-entrypoint-initdb.d are run indicating that the PV is empty; these shoudl only be run if the directory is empty. When I look at the PV its been around for some time:

postgres-data   Bound    pvc-830e8f59-9628-11e9-88b9-36ca52c85694   3Gi        RWO            do-block-storage   104d

Nothing else seems to be impacted this way. For example I have minio running as an object store and it keeps its data after deployments or scaling.

Any tips appreciated.