[Bug 1992459] Re: [VROC] Installation is available on spare disk, but it fails

[Dan Bungert]

Hi Kinga,

Many raid related changes have happened since the build you have tested,
and in fact we landed another fix recently, please retest with the
latest version.  You can do this with a supported install ISO or Ubuntu
Mantic daily, then my previous guidance still applies:

In the installation environment, you can get to a shell from the Help
Menu -> Enter shell. At that terminal, would you do:

sudo snap refresh --beta subiquity

and see if things get better?

Note that, I don't know if this is a surprise or not, the version you
recently tested is actually *older* than what the bug was first reported
with.

** Changed in: subiquity (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1992459

Title:
  [VROC] Installation is available on spare disk, but it fails

Status in subiquity package in Ubuntu:
  Incomplete

Bug description:
  Found on Ubuntu 22.04.1

  Steps to reproduce:
  1. Create container in OS with one disk (to mark its state as spare)
  #mdadm --create /dev/md/imsm0 --metadata=imsm --raid-devices=1 /dev/nvmeXn1 –run
  2. Verify that target disk is marked as spare. Get its metadata by executing command:
  #mdadm --examine /dev/nvmeXn1
  and check its state in output. Expected data:
  State : spare
  3. Reboot to target OS installer.
  Note: Use VMD replacement driver if exists in tested build.
  4. Check if spare disk cannot be chosen as installation destination

  Expected result:
  Spare disk cannot be chosen as installation destination.

  Actual result:
  Spare disk can be chosen as installation destination.


  Additional info:
  Installation on chosen spare disk can be started, but error occurs few seconds after installation starts.

  Install log contains an error:
  mdadm: successfully stopped /dev/md127 after 1 attempt(s)
          Wiping mdadm member devices: ['/dev/nvme3n1']
          Running command ['mdadm', '--examine', '/dev/nvme3n1'] with allowed return codes [0] (capture=True)
          finish: cmd-install/stage-partitioning/builtin/cmd-block-meta/clear-holders: FAIL: removing previous storage devices
          TIMED BLOCK_META: 1.765
          finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: curtin command block-meta
          Traceback (most recent call last):
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/commands/main.py", line 202, in main
              ret = args.func(args)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/log.py", line 97, in wrapper
              return log_time("TIMED %s: " % msg, func, *args, **kwargs)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/log.py", line 79, in log_time
              return func(*args, **kwargs)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/commands/block_meta.py", line 108, in block_meta
              meta_clear(devices, state.get('report_stack_prefix', ''))
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/commands/block_meta.py", line 1984, in meta_clear
              clear_holders.clear_holders(devices)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/block/clear_holders.py", line 638, in clear_holders
              shutdown_function(dev_info['device'])
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/block/clear_holders.py", line 209, in shutdown_mdadm
              mdadm.zero_device(mddev, force=True)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/block/mdadm.py", line 394, in zero_device
              metadata = mdadm_examine(devpath, export=False)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/block/mdadm.py", line 254, in mdadm_examine
              data = __mdadm_detail_to_dict(out)
            File "/snap/subiquity/3698/lib/python3.8/site-packages/curtin/block/mdadm.py", line 630, in __mdadm_detail_to_dict
              raise ValueError('Duplicate key in mdadm regex parsing: ' + key)
          ValueError: Duplicate key in mdadm regex parsing: state
          Duplicate key in mdadm regex parsing: state

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