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48 lines
1.7 KiB
48 lines
1.7 KiB
# Real life SD cards typically have less than they advertise. First off, they
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# often use a base of 1000 instead of 1024, and even then they are often smaller
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# than advertised. The number below is based on a conservative target of 7.9GB
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# (that's mathematical GB, base 1000), converted to MiB, rounding down.
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MENDER_STORAGE_TOTAL_SIZE_MB=7534
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# Use all there is, which gets us almost, but not quite, to 500MiB free space
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# (about 480MiB at the time of writing).
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IMAGE_ROOTFS_SIZE=-1
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IMAGE_ROOTFS_EXTRA_SPACE=0
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IMAGE_OVERHEAD_FACTOR=1.0
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# Best compression there is!
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MENDER_COMPRESS_DISK_IMAGE=lzma
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#
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# Resize the data partition to fill the remaining space, using parted, with systemd
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#
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function grow_data_partition() {
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log_info "Adding systemd init script to run parted and resize the data partition on boot"
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log_info "to fill all the available space on the storage media"
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run_and_log_cmd "sudo mkdir -p work/rpi/etc/systemd/system/"
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run_and_log_cmd "sudo mkdir -p work/rootfs/etc/systemd/system/data.mount.wants/"
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cat <<-EOF > work/rpi/etc/systemd/system/mender-grow-data.service
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[Unit]
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Description=Mender service to grow data partition size
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DefaultDependencies=no
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Before=data.mount
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Before=systemd-growfs@data.service
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[Service]
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Type=oneshot
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User=root
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Group=root
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ExecStart=/sbin/parted --script /dev/mmcblk0 resizepart ${MENDER_DATA_PART_NUMBER} 100%
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[Install]
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WantedBy=data.mount
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EOF
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# Install
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run_and_log_cmd "cp work/rpi/etc/systemd/system/mender-grow-data.service \
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work/rootfs/etc/systemd/system/"
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run_and_log_cmd "ln -sf work/rootfs/etc/systemd/system/mender-grow-data.service \
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work/rootfs/etc/systemd/system/data.mount.wants/"
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}
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PLATFORM_MODIFY_HOOKS+=(grow_data_partition)
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