tested this series more thoroughly and checked with an existing root pool all 3 install options:

* TUI
* GUI
* auto

Worked well in 3 cases to rename.

One oddity seems to be if we cancel the rename in the TUI installer. it jumps to 100% and stays there and I then need to manually abort. Jumping to a "setup cancelled" box that we confirm before quitting would be nice. This is how the GUI installer handles it.

Otherwise, besides this and a tiny nit in patch 4, consider this:

Reviewed-By: Aaron Lauterer <a.laute...@proxmox.com>
Tested-By: Aaron Lauterer <a.laute...@proxmox.com>

On  2024-07-11  13:57, Christoph Heiss wrote:
Pretty straight forward overall, implements a check for an existing
`rpool` on the system and ask the user whether they would like to rename
it, much in the same way as it works for VGs already.

Without this, the installer would silently create a second (and thus
conflicting) `rpool` and cause a boot failure after the installation,
since it does not know which pool to import exactly.

v1: https://lists.proxmox.com/pipermail/pve-devel/2024-May/063874.html
v2: https://lists.proxmox.com/pipermail/pve-devel/2024-July/064619.html

Notable changes v2 -> v3:
   * make low-level option lvm_auto_rename more generic
   * skip rename prompt in auto-install mode

Notable changes v1 -> v2:
   * incorporated Aarons suggestions from v1
   * rewrote tests to use a pre-defined input instead
   * moved pool renaming to own subroutine
   * documented all new subroutines
   * split out tests into own patch

Christoph Heiss (4):
   test: add test cases for new zfs module
   low-level: install: check for already-existing `rpool` on install
   install: config: rename option lvm_auto_rename ->
     existing_storage_auto_rename
   low-level: install: automatically rename existing rpools on
     auto-installs

  Proxmox/Install.pm                            | 35 +++++++++++-
  Proxmox/Install/Config.pm                     |  6 +-
  Proxmox/Sys/ZFS.pm                            | 20 ++++++-
  proxmox-auto-installer/src/utils.rs           |  2 +-
  .../resources/parse_answer/disk_match.json    |  2 +-
  .../parse_answer/disk_match_all.json          |  2 +-
  .../parse_answer/disk_match_any.json          |  2 +-
  .../tests/resources/parse_answer/minimal.json |  2 +-
  .../resources/parse_answer/nic_matching.json  |  2 +-
  .../resources/parse_answer/specific_nic.json  |  2 +-
  .../tests/resources/parse_answer/zfs.json     |  2 +-
  proxmox-installer-common/src/setup.rs         |  2 +-
  proxmox-tui-installer/src/setup.rs            |  2 +-
  test/Makefile                                 |  7 ++-
  test/zfs-get-pool-list.pl                     | 57 +++++++++++++++++++
  15 files changed, 128 insertions(+), 17 deletions(-)
  create mode 100755 test/zfs-get-pool-list.pl



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