#  -*- mode: python; -*-
#============================================================================
# Example Python setup script for 'xm create'.
# This script sets the parameters used when a domain is created using 'xm create'.
#
# This is a relatively advanced script that uses a parameter, vmid, to control
# the settings. So this script can be used to start a set of domains by
# setting the vmid parameter on the 'xm create' command line. For example:
#
# xm create vmid=1
# xm create vmid=2
# xm create vmid=3
#
# The vmid is purely a script variable, and has no effect on the the domain
# id assigned to the new domain.
#============================================================================

# Define script variables here.
# xm_vars is defined automatically, use xm_vars.var() to define a variable.

# This function checks that 'vmid' has been given a valid value.
# It is called automatically by 'xm create'.
def vmid_check(var, val):
    val = int(val)
    if val <= 0:
        raise ValueError
    return val

# Define the 'vmid' variable so that 'xm create' knows about it.
xm_vars.var('vmid',
            use="Virtual machine id. Integer greater than 0.",
            check=vmid_check)

# Check the defined variables have valid values..
xm_vars.check()

#----------------------------------------------------------------------------
# Kernel image file.
kernel = "/path/to/domU/kernel"

# Optional ramdisk.
#ramdisk = "/boot/initrd.gz"

# The domain build function. Default is 'linux'.
#builder='linux'

# Initial memory allocation (in megabytes) for the new domain.
memory = 64

# A name for the new domain. All domains have to have different names,
# so we use the vmid to create a name.
name = "VM%d" % vmid

# Which CPU to start domain on? 
#cpu = -1   # leave to Xen to pick
cpu = vmid  # set based on vmid (mod number of CPUs)

#----------------------------------------------------------------------------
# Define network interfaces.

# Number of network interfaces. Default is 1.
#nics=1

# Optionally define mac and/or bridge for the network interfaces.
# Random MACs are assigned if not given.

vif = [ 'ip=192.168.%d.1/24' % (vmid)]

#----------------------------------------------------------------------------
# Define the disk devices you want the domain to have access to, and
# what you want them accessible as.
# Each disk entry is of the form phy:UNAME,DEV,MODE
# where UNAME is the device, DEV is the device name the domain will see,
# and MODE is r for read-only, w for read-write.

# This makes the disk device depend on the vmid - assuming
# tHat devices sda7, sda8 etc. exist. The device is exported
# to all domains as sda1.
# All domains get sda6 read-only (to use for /usr, see below).
disk = [ 'phy:hda%d,hda1,w' % (vmid)]

#----------------------------------------------------------------------------
# Set the kernel command line for the new domain.
# You only need to define the IP parameters and hostname if the domain's
# IP config doesn't, e.g. in ifcfg-eth0 or via DHCP.
# You can use 'extra' to set the runlevel and custom environment
# variables used by custom rc scripts (e.g. VMID=, usr= ).

# Set if you want dhcp to allocate the IP address.
dhcp="off"
ip="192.168.%d.2" % (vmid)
# Set netmask.
netmask="255.255.255.0"
# Set default gateway.
gateway="192.168.%d.1" % (vmid)
# Set the hostname.
hostname= "domain-%d.xeno" % vmid

# Set root device.
root = "/dev/hda1 ro"

# Root device for nfs.
#root = "/dev/nfs"
# The nfs server.
#nfs_server = "10.212.4.103"
# Root directory on the nfs server.
#nfs_root   = "/path/to/root/filesystem"

# Sets runlevel 4 and the device for /usr.
extra = "4 VMID=%d" % vmid

#----------------------------------------------------------------------------
# Set according to whether you want the domain restarted when it exits.
# The default is 'onreboot', which restarts the domain when it shuts down
# with exit code reboot.
# Other values are 'always', and 'never'.

#restart = 'onreboot'

#============================================================================