The problem:

When using Full Text Search in PostgreSQL very often users need to keep dictionaries on a separate folder. The value is specified through a —sharedir flag. Right now in the operator it is not possible to set such folder.

Described well here: https://forums.percona.com/t/accessing-root-on-percona-postgres-instances/25134/14

Solution hypothesis:

There are multiple ways to approach it. Zalando Operator solves it with providing additionalVolumes:

We may also think if it can be done through a sidecar.