mkdiskimg

Create disk image file for embedded system or virtual machine.

Usage

mkdiskimg config.json

Example configuration file

• Create full.img with 64M size and mbr label.
• Create one 1M vfat partition; one 50M ext4 partition, and remaining space for a swap partition. Size can be specified by start and end sector, or with size.
• Extract rootfs archieve root_fs/rootfs.tar.gz to ext4 partition.
• Copy fat_files/boot.bin to vfat partition.
• Copy all files from misc_files to /root/ of ext4 partition.
• Write Hello, world! in testfile of vfat partition.

{
    "name" : "full",
    "size" : "64M",
    "label" : "mbr",
    "parts" : [
        {
            "filesystem" : "vfat",
            "type" : "p",
            "mbr_type" : "0x0b",
            "gpt_type" : "C12A7328-F81F-11D2-BA4B-00A0C93EC93B",
            "start" : "2048",
            "end" : "4095"
        },
        {
            "filesystem" : "ext4",
            "type" : "p",
            "mbr_type" : "0x83",
            "size" : "60M"
        },
        {
            "filesystem" : "swap",
            "type" : "p",
            "mbr_type" : "0x82",
            "end" : "-40"
        }
    ],
    "tarballs" : [
        {
            "part" : "2",
            "target" : "/",
            "source" : "root_fs/rootfs.tar.gz"
        }
    ],
    "uploads" : [
        {
            "part" : "1",
            "target" : "/boot.bin",
            "source" : "fat_files/boot.bin"
        },
		{
            "part" : "2",
            "target" : "/root/",
            "source" : "misc_files/*"
        }
    ],
    "writes" : [
        {
            "part" : "1",
            "path" : "/testfile",
            "content" : "Hello, world!"
        }
    ]
}