Filesystem expansion on rpi4 doesn't work with Alpine

[jimmykarily]

• Install quay.io/kairos/alpine:3.18-standard-arm64-rpi4-v2.4.2-rc2-k3sv1.28.2-k3s1-img on rpi4 following our docs.
• Use a simple config:

  #cloud-config

users:
  - name: kairos
    passwd: kairos

k3s:
  enabled: true

• On the first boot edit grub menu to add rd.debug rd.immucore.debug
• After booting run df -h and check the size of COS_PERSISTENT

Result:

The partition is expanded to the disks full size (check with lsblk) but the filesystem is not (check with df -h)

The debug logs from boot show there was an error:

1970-01-01T00:00:21Z INF Processing stage step 'Grow persistent'. ( commands: 0, files: 0, ... )
1970-01-01T00:00:21Z DBG Stage: {"Commands":null,"Files":null,"Downloads":null,"Directories":null,"If":"[ ! -f /run/cos/recovery_mode ] \u0026\u0026 [ ! -f /run/cos/live_mode ] \u0026\u0026 [ -f \"/sys/firmware/devicetree/}
1970-01-01T00:00:21Z DBG Using label COS_PERSISTENT for layout expansion
1970-01-01T00:00:21Z DBG Output of udevadm settle: 
1970-01-01T00:00:21Z DBG Got device /dev/mmcblk0 for label COS_PERSISTENT
1970-01-01T00:00:22Z INF Extending last partition to max space
1970-01-01T00:00:22Z DBG Expanding partition 5 up to 0 sectors
1970-01-01T00:00:23Z DBG Output of growpart: CHANGED: partition=5 start=21635072 old: size=131072 end=21766143 new: size=103536640 end=125171711

1970-01-01T00:00:23Z DBG Trying to reread the partition table of /dev/mmcblk0 (try number 1)
1970-01-01T00:00:23Z DBG output of partprobe: Warning: Not all of the space available to /dev/mmcblk0 appears to be used, you can fix the GPT to use all of the space (an extra 2014 blocks) or continue with the current sett 

1970-01-01T00:00:23Z DBG Output of sync: 
1970-01-01T00:00:23Z DBG Trying to resize filesystem for device /dev/mmcblk0p5
1970-01-01T00:00:23Z DBG Found filesystem ext4
 for device /dev/mmcblk0p5
1970-01-01T00:00:24Z DBG Output from running e2fsck e2fsck 1.47.0 (5-Feb-2023)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
COS_PERSISTENT: 13/16384 files (0.0% non-contiguous), 9515/65536 blocks

1970-01-01T00:00:24Z ERR error running resize2fs: failed to run resize2fs /dev/mmcblk0p5: exit status 1
1970-01-01T00:00:24Z ERR resize2fs 1.47.0 (5-Feb-2023)
Please run 'e2fsck -f /dev/mmcblk0p5' first.


1970-01-01T00:00:24Z ERR failed to run resize2fs /dev/mmcblk0p5: exit status 1

(the wrong timestamps are related to: #1994 )

This only affects alpine. On quay.io/kairos/opensuse:leap-15.5-standard-arm64-rpi4-v2.4.2-rc2-k3sv1.28.2-k3s1-img everything works fine.