97 lines
2.5 KiB
Plaintext
97 lines
2.5 KiB
Plaintext
#/bin/bash
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# usage:
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## create image name format YYYY-MM-DD-HHMM-S.<TAG>.img/.xz/.info
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### pi_create_image <image name tag no spaces>
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## generate sha256 of uncompressed image
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### pi_create_image <image name tag no spaces> true
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timestamp=`date +"%Y-%m-%d-%H%M-%S"`
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# handle filename
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if [ -z "$1" ]; then
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tag=$timestamp-pi
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else
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tag=$timestamp-$1
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fi
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# fiel paths
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imgname=$tag.img
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xzname=$imgname.xz # already has da pwd from imgname
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info=$xzname.info
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checksums=sha256sum-$tag.sha256
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# create info file
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touch $info
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# get real username (not root) if run with sudo
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if [ ! -z $SUDO_USER ]; then
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username=$SUDO_USER
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else
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username=$USER
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fi
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# get disk
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lsblk
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echo "Enter disk name (including /dev/) ex /dev/sdb"
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read dadisk
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# start
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webhook "starting copy $dadisk to $imgname to $xzname at $(date)($(date +%s))\ninfo: $info" true
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# copy disk
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sudo dd if=$dadisk of=$imgname bs=4M status=progress
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imgsize=$(du -h $imgname)
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imgbytes=$(du - $imgname)
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webhook "Copied the disk to $imgname size $imgsize ($imgbytes)"
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if [ ! -z "$2" ]; then
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# img sha256
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webhook "creating sha256 checksum of $imgname"
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img_checksum=$(sha256sum $imgname)
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echo "$img_checksum" | tee -a $info
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webhook "sha256 of $imgname is $img_checksum, saved to $info"
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fi
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# shrink and compress the image
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# -Z xz image after shrinking
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# -a use multiple cores for xz
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# -v verbose
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# -r use advanced filesystem repair if normal one fails
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webhook "shrinking and compressing the image"
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sudo pishrink -Z -r -v -a $imgname
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xzsize=$(du -h $xzname)
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xzbytes=$(du -b $xzname)
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# log filesizes
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webhook "saving sizes imgsize: $imgsize / $imgbytes xzsize: $xzsize / $xzbytes to $info"
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echo -e "imgsize: $imgsize ($imgbytes)\nxzsize: $xzsize ($xzbytes)" | tee -a $info
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# change archive to be friendly perms
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webhook "changing perms"
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sudo chown $username:$username $xzname
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# test archive with xztools
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webhook "testing archive $xzname"
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xz -t $xzname
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ret=$?
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# if test fails
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if [ $ret -gt 0 ]; then
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webhook "FAIL! ARCHIVE DES NOT CHECK return code: $ret EXITING"
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exit 1
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# if test succeeds
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else
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webhook "Archive Test SUCCESS"
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fi
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# always generate last checksum
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webhook "calculating xz checksum"
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xz_checksum=$(sha256sum $xzname)
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echo "$xz_checksum" | tee -a $info
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webhook "xz checksum $xz_checksum"
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# finish and notify
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webhook "DONE\n\tdisk: $dadisk\n\timgname: $imgname size $imgsize / $imgbytes\n\txzname: $xzname size $xzsize / $xzbytes\n\tsha256 of $xzname: $xz_checksum\n\tinfo file: $info" true
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# schedule reboot in 1 minute
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sudo shutdown -r +1 |