forked from sig_altarch/RockyRpi
59 lines
2.0 KiB
Bash
Executable File
59 lines
2.0 KiB
Bash
Executable File
#!/bin/bash
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# Simple script that runs a Rocky Raspberry pi creation (via appliance-creator), then inserts a UUID to the kernel boot line of the image
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# after-the-fact
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#
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# Usage: ./Rocky8_Rpi4_mkimage.sh /path/to/outputfolder/
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#
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#
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# Needs to be run in the same directory as the rocky rpi kickstart, as it relies on it!
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#
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# Exit with error if we don't have an output directory:
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OUTDIR=$1
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if [[ -z "$OUTDIR" ]]; then
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echo "Need to run this script with a path to output directory. Like: ${0} /path/to/output/"
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exit 1
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fi
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mkdir -p "${OUTDIR}"
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# Actually create the image. Our kickstart data should be in the same git repo as this script:
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# (This takes a while, especially building on an rpi. Patience!)
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appliance-creator -v -c ./Rocky8_Rpi4.ks -n RockyRpi --version=20210626 --release=1 --vmem=2048 --vcpu=2 --no-compress -o "${OUTDIR}"
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# Post appliance-creator sequence to add UUID to the cmdline.txt file under /boot :
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# (We don't want to rely on a /dev/ device name, what if a user wants to use a non-sdcard boot mechanism?)
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mkdir -p /mnt/tmp
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# find the image we just made, and make it available on /dev/maper/loop* devices:
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image=$(find "${OUTDIR}" -iname '*.raw' | head -1)
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echo "Getting UUID and inserting to boot from ${image} ...."
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kpartx -av "${image}"
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# Get the loop partition; it might be loop0p3, loop1p3, ...
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looppart=$(kpartx -l "${image}" | awk '/p3/{print $1}')
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# Get the UUID of our root partition (the ext4 one) (UUID=e3984938429 , strip out quotes("), and force upper case)
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partuuid=$(blkid | grep "mapper/${looppart}" | head -1 | awk '{gsub(/\"/,"", $NF); print toupper($0)}')
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# Mount the /boot partition (swap the 3rd partition for the first):
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umount /mnt/tmp
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mount /dev/mapper/${looppart/3/1} /mnt/tmp
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# Swap out the "root=" part of cmdline.txt for our "root=UUID=blah"
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sed -i "s/root= /root=${partuuid} /" /mnt/tmp/cmdline.txt
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# Debug check to make sure it looks right:
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echo "cmdline.txt looks like this, please review:"
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cat /mnt/tmp/cmdline.txt
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# Finished, unmount and clean loopbacks:
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umount /mnt/tmp
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kpartx -d "${image}"
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