x3i , 1 month ago

Update: seems like the persistence section is sufficient; I have

persistence:
  enabled: true
  existingClaim: nextcloud-config-claim

at the end of my values file which references a volume claim (and volume) that I created manually upfront. The importand file is config.php. Back that thing up immediately and three times, print it if you have to. The secret in there is unrecoverable otherwise and needed for any repair actions.
I also use the postgresql sub-chart (by simply enabling postgresql as database) and provide a claim there:

postgresql:
  enabled: true
global:
    postgresql:
      auth:
        username: XX
        password: YY
        database: nextcloud
  image:
    repository: postgres
    tag: "14"
    postgresqlDataDir: /bitnami/pgdata
  primary:
    persistence:
      enabled: true
      existingClaim: nextcloud-db-claim

Hope it helps!