Azure image requires VHD cookie with value "conectix"

[msehnout]

When uploading the vhd image to Azure it fails to boot with this error message:

{
  "error": {
    "code": "InvalidParameter",
    "message": "The specified cookie value in VHD footer indicates that disk 'image.vhd' with blob https://golangimageuploads.blob.core.windows.net:8443/quickstart-6922813081684464493/image.vhd is not a supported VHD. Disk is expected to have cookie value 'conectix'.",
    "target": "disks"
  }
}

more info: https://support.microsoft.com/en-us/help/4053292/conectix-error-and-uploaded-vhd-is-not-supported-when-you-create-a-vm

[msehnout]

This can be fixed using the tutorial available at Microsoft support:

rawdisk="MyLinuxVM.raw"
vhddisk="MyLinuxVM.vhd"
MB=$((1024*1024))
size=$(qemu-img info -f raw --output json "$rawdisk" | gawk 'match($0, /"virtual-size": ([0-9]+),/, val) {print val[1]}')
rounded_size=$((($size/$MB + 1)*$MB))
echo "Rounded Size = $rounded_size"
qemu-img resize MyLinuxVM.raw $rounded_size
qemu-img convert -f raw -o subformat=fixed,force_size -O vpc MyLinuxVM.raw MyLinuxVM.vhd

Such image can be imported as a VM image into Azure.

[joshspicer]

more detail on how to do this on MacOS/Linux can be found in the msft docs: https://docs.microsoft.com/en-us/azure/virtual-machines/linux/create-upload-generic#resizing-vhds