I loop mounted the arch linux iso, and edited the cfg file as follows:

name = "ciffcloud"
bootloader = "pygrub"
kernel = "/mnt/arch/arch/boot/x86_64/vmlinuz"
ramdisk = "/mnt/arch/arch/boot/x86_64/archiso.img"
extra = "archisobasedir=arch archisolabel=ARCH_201403"
memory = 512
vcpus = '1'
disk = [
        'file:/mnt/system/ciffcloud/ciffcloud.img,xvda,w',
        'file:/mnt/system/ciffcloud/archlinux.iso,hdc:cdrom,r'
        ]
vif = [ 'mac=00:16:3e:a1:a1:a1,bridge=br0']

boot = 'dc'

 

I keep getting the following error when trying to create the VM

root@Tower:/mnt/system/ciffcloud# xl create ciffcloud.cfg -c
Parsing config from ciffcloud.cfg
xl: libxl_bootloader.c:42: bootloader_arg: Assertion `bl->nargs < bl->argsspace' failed.
Aborted (core dumped)

 

I assume that these following two lines...

kernel = "/mnt/arch/arch/boot/x86_64/vmlinuz"

ramdisk = "/mnt/arch/arch/boot/x86_64/archiso.img"

...are supposed to point to the loop mounted ISO. Which in this case is correct.

Also to note that the mounted iso is read only.

 

Any ideas?

Try commenting-out the bootloader = "pygrub" line.  I had a similar thing happen to me today trying to build an Ubuntu VM from scratch and got the exact same error message.

Comment it out by putting a # at the start of its line. After you get through the install you can add pygrub as the bootloader.

Read the wiki!

 

https://wiki.archlinux.org/index.php/xen#Create_a_domU_.22hard_disk.22

@doorunrun, thanks that worked.

 

@ironicbadger, I did I must have missed the line.