[Bug 1974598] Re: upgrade from 20.04 to 22.04 failed

[Paul White]

** Package changed: ubuntu => ubuntu-release-upgrader (Ubuntu)

** Tags added: focal

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https://bugs.launchpad.net/bugs/1974598

Title:
  upgrade from 20.04 to 22.04 failed

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  do-release-upgrade seems to have failed on grub-efi, wondering if it
  choked on my config; attached logs as per error message.

  System was left in bootable, runnable state, but a zpool was blown
  away.

  ------
  system pools and one pool on NVMe were ok:

  sribe at sribe000:~$ sudo zpool status
    pool: bpool
   state: ONLINE
    scan: scrub repaired 0B in 0 days 00:00:01 with 0 errors on Sun May  8 00:24:02 2022
  config:

  	NAME                                               STATE     READ WRITE CKSUM
  	bpool                                              ONLINE       0     0     0
  	  mirror-0                                         ONLINE       0     0     0
  	    ata-SuperMicro_SSD_SMC0515D90120D212004-part2  ONLINE       0     0     0
  	    ata-SuperMicro_SSD_SMC0515D94819DQL3014-part2  ONLINE       0     0     0

  errors: No known data errors

    pool: pg_pool
   state: ONLINE
    scan: scrub repaired 0B in 0 days 00:00:15 with 0 errors on Sun May  8 00:24:16 2022
  config:

  	NAME                                                 STATE     READ WRITE CKSUM
  	pg_pool                                              ONLINE       0     0     0
  	  mirror-0                                           ONLINE       0     0     0
  	    nvme-INTEL_SSDPELKX010T8_PHLJ0081015R1P0I-part1  ONLINE       0     0     0
  	    nvme-INTEL_SSDPELKX010T8_PHLJ008100M71P0I-part1  ONLINE       0     0     0

  errors: No known data errors

    pool: rpool
   state: ONLINE
    scan: scrub repaired 0B in 0 days 00:00:11 with 0 errors on Sun May  8 00:24:13 2022
  config:

  	NAME                                               STATE     READ WRITE CKSUM
  	rpool                                              ONLINE       0     0     0
  	  mirror-0                                         ONLINE       0     0     0
  	    ata-SuperMicro_SSD_SMC0515D90120D212004-part3  ONLINE       0     0     0
  	    ata-SuperMicro_SSD_SMC0515D94819DQL3014-part3  ONLINE       0     0     0

  errors: No known data errors

  ------
  but an archive pool on HDD is fubar:

  sribe at sribe000:~$ sudo zpool import
     pool: zp_repo
       id: 11719108999789418570
    state: FAULTED
   status: The pool metadata is corrupted.
   action: The pool cannot be imported due to damaged devices or data.
  	The pool may be active on another system, but can be imported using
  	the '-f' flag.
     see: http://zfsonlinux.org/msg/ZFS-8000-72
   config:

  	zp_repo                                              FAULTED  corrupted data
  	logs
  	  mirror-1                                           ONLINE
  	    nvme-INTEL_SSDPELKX010T8_PHLJ0081015R1P0I-part2  ONLINE
  	    nvme-INTEL_SSDPELKX010T8_PHLJ008100M71P0I-part2  ONLINE

  ------
  the pool is not active on another system and import with -f fails

  Fortunately, reverting to a snapshot of the system before the failed
  upgrade brought the zpool back. I have a pretty customized ZFS setup,
  including tweaks to /usr/share/initramfs-tools/scripts/zfs--so it
  might be the case that I will never be able to use the automatic
  upgrade.

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