feat: allow extraVolumes and extraVolumeMounts in helm chart

[hegerdes]

TL;DR

The user @simonostendorf provided the great feature in #652 to read the HCLOUD_TOKEN from an file! It is great having the possibility to read the token from a file since leaking files is much less likely then envs.

Unfortunately I have a hard time using this feature when you don't use HashiCorps Secret injector. Normally you would mount the secret as a volume but you cant do this currently since the chart does not support any extraVolumes or extraVolumeMounts. But this is kind of needed when you use CSI Secret Driver or just want to mount the k8s secret as a file.

Expected behavior

Being able to set extraVolumes or extraVolumeMounts so I can use my existing k8s secret and mount it as file via secret-key-ref oder to use a kubernetes secret csi driver definition as volume.

Is this something worth supporting? I would happily provide a PR if this is an accepted feature from Hetzner.

Update:
PR in #744

[simonostendorf]

I think supporting the CSI Secret Driver would be great.

(And cool that someone uses my feature :))

[apricote]

Sounds good, happy to accept a pull request for this :)