#!/usr/bin/python3
#coding: UTF-8
import optparse
import os
from shared import *
# vars
iscsiTargetIp='10.0.0.1'
iscsiDate='2011-04'
defaultImage='/root/vserver-template-v2.tar.bz2'

# configure known options
usage = "usage: %prog VMNAME IP [options]"
parser = optparse.OptionParser(usage=usage)
parser.add_option("-v", "--verbose", dest="verbose",
                    action="store_true",  default=False,
                    help="should I do output")
(options, args) = parser.parse_args()

# check if required args are given
if len(args) < 2:
    parser.print_usage()
    logErr("a vm-name and ip must be given!")
    sys.exit(2)
elif len(args) > 2:
    parser.print_usage()
    logErr("to many arguments given!")
    sys.exit(2)

vmName = parseVmName(args[0])
ip, ipLastBlock = parseIp(args[1])
iscsiLunId = 'iqn.' + iscsiDate + '.de.spline:'
vmConfigDir = '/etc/vservers/' + vmName

exe = Executor([
    ExecRecepie('discover iscsi luns',
         [ 'iscsiadm', '-m', 'discovery', '-t', 'st', '-p', iscsiTargetIp ]),
    ExecRecepie('log in to iscsi lun ' + iscsiTargetIp,
        [ 'iscsiadm', '-m', 'node', '-T', iscsiLunId, iscsiTargetIp, '--login' ]),
# maybe i schould grep if, the device was in the output
#       10.0.0.1:3260,1 iqn.2011-04.de.spline:<name>
    ExecRecepie('create vserver folder',
        [ 'mkdir', '/vservers/' + vmName ]),
    ExecRecepie('mount vserver directory',
        [ 'mount', '/dev/disk/by-label/' + vmName, '/vservers/' + vmName]),
    ExecRecepie('create vserver ( this may take some time)',
        [   'vserver', vmName, 'build',
            '-m', 'template',
            '--interface', 'eth0:' + ip + '/25',
            '--initstyle', 'sysv',
            '--context', str(ipLastBlock),
            '--hostname', vmName,
            '--',
            '--template', defaultImage,
            '-d', 'debian' ]),

    # iscsi meta-daten im vserver-etc verzeichnis hinzufuegen
    ConfigRecepie('configure iscsi lun for vm',
        vmConfigDir  + '/iscsi',
        {
            'portal' : iscsiTargetIp + '\n',
            'target' : iscsiLunId + '\n'
        }),
    FstabRecepie('configure fstab', vmConfigDir  + '/fstab','/dev/disk/by-label/ ' + vmName),
# die dem vserver zugehörige disk erstmal unmounten und dann in die fstab des vservers einfuegen, damit
# sie beim starten benutzt wird
    ConfigRecepie('configure ipv6 address',
        vmConfigDir  + '/interfaces/1',
        {
            'ip' : '2001:6f8:1c3c:babe::' + str(ipLastBlock) +':1',
            'prefix': '64\n',
            'dev': 'eth0\n'
        }),
# neue (2011-04) vserver-utils mit "mark" benutzen, damit zB automatisch distributions-spezifische updates gefahren
# werden können - falls das nicht gewuenschst ist, koennen 2. und 3. übersprungen werden
    ConfigRecepie('configure marks',
        vmConfigDir  + '/apps/init',
        { 'mark' : 'pang\ndebian\nauto-update\n'}),

    ExecRecepie('umount disk', [ 'umount', '/vservers/' + vmName ]),
    ExecRecepie('start vserver', [ 'vserver', vmName, 'start' ])
])

exe.do()

logInfo("your vserver is up and running!")
logInfo("you might enter it by: vserver " + vmName + ' enter')

sys.exit(0)