Partition with custom mountpoint using MENDER_EXTRA_PARTS

malveo · May 31, 2021, 6:21pm

Hello Folks -

It is possible to leverage MENDER_EXTRA_PARTS and MENDER_EXTRA_PARTS_FSTAB to customize the mount point for additional images, or MENDER_EXTRA_PARTS_FSTAB is only for the “options” section of the fstab entry?

Thanks.

oleorhagen · June 1, 2021, 12:42pm

# Example MENDER_EXTRA_PARTS usage:
#   Extra partitions to create after the data parition
#   MENDER_EXTRA_PARTS = "part1 part2"
#
#   Size (in MB) of specified extra partition
#   MENDER_EXTRA_PARTS_SIZES_MB[part1] = "64"
#   MENDER_EXTRA_PARTS_SIZES_MB[part2] = "128"
#
#   FSTAB options of specified extra partition (optional)
#   MENDER_EXTRA_PARTS_FSTAB[part1] = "..."
#   MENDER_EXTRA_PARTS_FSTAB[part2] = "..."

Does this make sense?

malveo · June 1, 2021, 2:11pm

Hi @oleorhagen -

Totally make sense.

But I was looking for a way to specify a custom mount point, instead of /mnt/${label}

github.com

mendersoftware/meta-mender/blob/1dbb4b07a057045b4b60e26a5eefcac764abb7c4/meta-mender-core/classes/mender-setup-image.inc#L52

    
      
                  mkdir -p ${IMAGE_ROOTFS}/${MENDER_BOOT_PART_MOUNT_LOCATION}
                  printf "%-20s %-20s %-10s %-21s %-2s %s\n" ${tmpBootPart} ${MENDER_BOOT_PART_MOUNT_LOCATION} ${MENDER_BOOT_PART_FSTYPE} ${MENDER_BOOT_PART_FSTAB_OPTS} 0 2 >> ${IMAGE_ROOTFS}${sysconfdir}/fstab
              else
                  bbdebug 2 "MENDER_BOOT_PART not applicable. Not adding to fstab..."
              fi
          fi
          
          
mkdir -p ${IMAGE_ROOTFS}/data
          printf "%-20s %-20s %-10s %-21s %-2s %s\n" ${tmpDataPart} /data ${MENDER_DATA_PART_FSTYPE} ${MENDER_DATA_PART_FSTAB_OPTS} 0 2 >> ${IMAGE_ROOTFS}${sysconfdir}/fstab
          
          
if [ -n "${MENDER_EXTRA_PARTS}" ]; then
              local extra_part_fstab="${@get_extra_parts_fstab(d)}"
              local labels="${@get_extra_parts_labels(d)}"
              for label in $labels; do
                  mkdir -p ${IMAGE_ROOTFS}/mnt/${label}
              done
          
          
    if [ ${partuuid} = "true" ]; then
                  bbfatal "MENDER_EXTRA_PARTS and DISTRO_FEATURE 'mender-partuuid' are both defined and incompatible"
              fi

Thank you

oleorhagen · June 2, 2021, 7:40am

Hi @malveo

I’m not too familiar with the image code in meta-mender, but from what I gather (same as you it seems), there is no OOTB way to do this with the existing functionality if you want to mount it somewhere else.

It seems that you might not have to change too much though.

Do you want to take a stab at it?

nowls · April 29, 2024, 2:15pm

I added functionality to specify the mount location of extra partitions through the MENDER_EXTRA_PARTS_MOUNT_LOCATIONS variable. See here for the implementation and here for documentation PRs.

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Partition with custom mountpoint using MENDER_EXTRA_PARTS

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