mirror of
https://github.com/rancher/os.git
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80 lines
3.0 KiB
Bash
Executable File
80 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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set -e -x
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cd $(dirname $0)/..
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# create build directory for assembling our image filesystem
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mkdir -p build/{boot,root,basefs} dist
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cp assets/raspberrypi-bootloader_*_armhf.deb build/bootloader.deb
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cp assets/rpi3-bootfiles.tar.gz build/rpi3-bootfiles.tar.gz
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#---build SD card image---
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# size of root and boot partion (in MByte)
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IMAGE_TOTAL_SIZE=500
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BOOT_PARTITION_START=2048
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BOOT_PARTITION_SIZE=25
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#---don't change here---
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BOOT_PARTITION_OFFSET="$((BOOT_PARTITION_START*512))"
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BOOT_PARTITION_BYTES="$((BOOT_PARTITION_SIZE*1024*1024))"
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BOOT_PARTITION_SECTORS="$((BOOT_PARTITION_SIZE*1024*2))"
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ROOT_PARTITION_START="$((BOOT_PARTITION_START+BOOT_PARTITION_SECTORS))"
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ROOT_PARTITION_OFFSET="$((ROOT_PARTITION_START*512))"
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#---don't change here---
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# create image file with two partitions (FAT32, EXT4)
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dd if=/dev/zero of=build/run.img bs=1MiB count=$IMAGE_TOTAL_SIZE
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echo -e "o\nn\np\n1\n${BOOT_PARTITION_START}\n+${BOOT_PARTITION_SECTORS}\nt\nc\nn\np\n2\n${ROOT_PARTITION_START}\n\nw\n" | fdisk build/run.img
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fdisk -l build/run.img
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ls -al build/run.img
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# partition #1 - Type= c W95 FAT32 (LBA)
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losetup -d /dev/loop0 || /bin/true
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losetup --offset $BOOT_PARTITION_OFFSET --sizelimit $BOOT_PARTITION_BYTES /dev/loop0 build/run.img
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mkfs.vfat -n RancherOS /dev/loop0
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losetup -d /dev/loop0
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# partition #2 - Type=83 Linux
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losetup -d /dev/loop1 || /bin/true
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losetup --offset $ROOT_PARTITION_OFFSET /dev/loop1 build/run.img
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mkfs.ext4 -O ^has_journal -b 4096 -L rootfs /dev/loop1
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losetup -d /dev/loop1
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# mount partitions as loopback devices
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mount -t ext4 -o loop=/dev/loop1,offset=$ROOT_PARTITION_OFFSET build/run.img build/root
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mkdir -p build/root/boot
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mount -t vfat -o loop=/dev/loop0,offset=$BOOT_PARTITION_OFFSET build/run.img build/root/boot
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echo "RancherOS: boot partition" > build/root/boot/boot.txt
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echo "RancherOS: root partition" > build/root/root.txt
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# unpack and cleanup the basefs
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#- doing this on a local folder keeps our resulting image clean (no dirty blocks from a delete)
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dpkg-deb -x build/bootloader.deb build/basefs
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# upgrade Raspberry Pi bootfile for RPi3 support
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tar xvzf build/rpi3-bootfiles.tar.gz -C build/basefs/boot
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# remove RPi1 kernel, we only support RPi2 and RPi3 in ARMv7 mode
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rm -fr build/basefs/boot/kernel.img
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rm -fr build/basefs/lib/modules/{4.1.17+,4.1.17-hypriotos+}
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# populate kernel, bootloader and RancherOS rootfs
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cp -R build/basefs/* build/root
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tar -xf assets/rootfs_arm.tar.gz -C build/root
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echo "+dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 cgroup-enable=memory swapaccount=1 elevator=deadline rootwait console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty0 rancher.password=rancher rw init=/init" > build/root/boot/cmdline.txt
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# show details
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tree -a -L 3 build/root
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df -h
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# unmount partitions (loopback devices will be removed automatically)
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umount build/root/boot
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umount build/root
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# package, compress and export image file
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mv build/run.img build/rancheros-raspberry-pi.img
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zip dist/rancheros-raspberry-pi.zip build/rancheros-raspberry-pi.img
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ls -alh dist
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# cleanup build environment
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rm -fr build
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