Wipe option for additional disks

[freswa]

Feature Request

machine:
  disks:
    - device: /dev/disk/by-id/scsi-0HC_Volume_5878184
      wipe: true
      partitions:
        - size: 10737383424
          mountpoint: /var/data

To wipe the disk before partitioning, formatting and mounting.

machine:
  disks:
    - device: /dev/disk/by-id/scsi-0HC_Volume_5878184
      partitions:
        - size: 10737383424
          mountpoint: /var/data
          wipe: true

To wipe the partition before formatting and mounting.

[andrewrynhard]

Is the expectation that this would only occur at the initial disk setup (like how the installation wipe option works) or on every boot?

[freswa]

I think the initial setup would benefit from this option, but there you can also setup the disk externally, since you don't rely on the system yet.
Instead, I'd use the wipe option to grow the disks. The disks save persistent but redundant data. So it's fine to drop the data of one node. I don't see any other option to reformat a disk after it's partitioned initially.

[rafaribe]

Following because it would be really useful to not rely on another OS to wipe disks to use in a Ceph Cluster

[smira]

Following because it would be really useful to not rely on another OS to wipe disks to use in a Ceph Cluster

We should have support for wiping in Talos, but in the meantime this can be done by scheduling privileged pod on Kubernetes and wiping the disks this way.

[vorburger]

Is the expectation that this would only occur at the initial disk setup (like how the installation wipe option works) or on every boot?

#5485 imagines an on: [install, upgrade]... perhaps a kind of wipe: onInstall &| onUpgrade &| onBoot instead of a simple wipe: true would make sense here.

[smira]

talosctl reset supports --user-disks-to-wipe now