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 60M ext4 partition, and remaining space for a swap partition. Size can be specified by start and end sector, or with size.
• Extract rootfs achieve 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",
    "partition_table" : "mbr",
    "parts" : [
        {
            "filesystem" : "vfat",
            "type" : "p",
            "mbr_id" : "0x0b",
            "start" : "2048",
            "end" : "4095",
            "uploads" : [
                {
                    "target" : "/boot.bin",
                    "source" : "fat_files/boot.bin"
                }
            ],
            "writes" : [
                {
                    "path" : "/testfile",
                    "content" : "Hello, world!"
                }
            ]
        },
        {
            "filesystem" : "ext4",
            "type" : "p",
            "mbr_id" : "0x83",
            "size" : "60M",
            "tarballs" : [
                {
                    "target" : "/root/",
                    "source" : "root_fs/rootfs.tar.gz"
                }
            ],
            "uploads" : [
                {
                    "target" : "/",
                    "source" : "misc_files/*"
                }
            ]
        },
        {
            "filesystem" : "swap",
            "type" : "p",
            "mbr_id" : "0x82",
            "end" : "-40"
        }
    ],
}