oz-install

#!/usr/bin/env python

# Copyright (C) 2010,2011  Chris Lalancette <clalance@redhat.com>
# Copyright (C) 2012,2013  Chris Lalancette <clalancette@gmail.com>

# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation;
# version 2.1 of the License.

# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

import sys
import getopt
import logging
import time

import oz.TDL
import oz.GuestFactory
import oz.ozutil

def usage():
    print("Usage: oz-install [OPTIONS] <tdl>")
    print(" OPTIONS:")
    print("  -a <auto>\tUse the guest configuration tool from <auto> instead")
    print("\t\tof using the hard-coded one.  This is useful if you want to pass")
    print("\t\ta custom kickstart/preseed/sif/etc for installation")
    print("  -b <disk_bus>\tUse the <disk_bus> for attaching guest storage instead of")
    print("\t\tthe built-in Oz default")
    print("  -c <config>\tGet config from <config> (default is /etc/oz/oz.cfg)")
    print("  -d <level>\tTurn up logging level.  The levels are:")
    print("\t\t\t0 - errors only (this is the default)")
    print("\t\t\t1 - errors and warnings")
    print("\t\t\t2 - errors, warnings, and information")
    print("\t\t\t3 - all messages")
    print("\t\t\t4 - all messages, prepended with the level and classname")
    print("  -f\t\tForce download of installation media even if already cached")
    print("  -g\t\tGenerate the ICICLE after installation")
    print("  -h\t\tPrint this help message")
    print("  -i <icicle>\tWrite the ICICLE to <icicle> (only valid with -g)")
    print("  -m <mac_address>\tUse <mac_address> for the network interface instead of an autogenerated value")
    print("  -n <net_dev>\tUse <net_dev> for the network instead of the built-in Oz default")
    print("  -p\t\tCleanup old guests with the same name before installation")
    print("  -s <disk>\tWrite the output to <disk> (default is the TDL name tag)")
    print("  -t <timeout>\tWait <timeout> seconds for installation, rather than the default")
    print("  -u\t\tAfter installation, do the customization")
    print("  -x <xmlfile>\tWrite libvirt XML to <xmlfile>")
    print(" Currently supported architectures are:")
    print("   i386, x86_64")
    print(" Currently supported operating systems are:")
    oz.GuestFactory.distrolist()
    sys.exit(1)

try:
    opts, args = getopt.gnu_getopt(sys.argv[1:], 'a:b:c:d:fghi:m:n:ps:t:ux:',
                                   ['auto', 'disk-bus', 'config', 'debug',
                                    'force-download', 'generate-icicle', 'help',
                                    'icicle', 'mac-address', 'network-device',
                                    'cleanup', 'disk', 'timeout', 'customize',
                                    'xmlfile'])
except getopt.GetoptError as err:
    print(str(err))
    usage()

loglevel = logging.ERROR
logformat = "%(message)s"
force_download = False
config_file = None
generate_icicle = False
filename = None
customize = False
cleanup = False
auto = None
timeout = None
icicle_file = None
output_disk = None
diskbus = None
netdev = None
macaddress = None
for o, a in opts:
    if o in ("-a", "--auto"):
        auto = a
    elif o in ("-b", "--disk-bus"):
        diskbus = a
    elif o in ("-c", "--config"):
        config_file = a
    elif o in ("-d", "--debug"):
        try:
            d_int = int(a)
        except ValueError:
            usage()
        if d_int == 0:
            loglevel = logging.ERROR
        elif d_int == 1:
            loglevel = logging.WARNING
        elif d_int == 2:
            loglevel = logging.INFO
        elif d_int == 3:
            loglevel = logging.DEBUG
        elif d_int >= 4:
            loglevel = logging.DEBUG
            logformat = logging.BASIC_FORMAT
    elif o in ("-f", "--force-download"):
        force_download = True
    elif o in ("-g", "--generate-icicle"):
        generate_icicle = True
    elif o in ("-h", "--help"):
        usage()
    elif o in ("-i", "--icicle"):
        icicle_file = a
    elif o in ("-n", "--network-device"):
        netdev = a
    elif o in ("-m", "--mac-address"):
        macaddress = a
    elif o in ("-p", "--cleanup"):
        cleanup = True
    elif o in ("-s", "--disk"):
        output_disk = a
    elif o in ("-t", "--timeout"):
        timeout = int(a)
    elif o in ("-u", "--customize"):
        customize = True
    elif o in ("-x", "--xmlfile"):
        filename = a
    else:
        assert False, "unhandled option"

if len(args) != 1:
    usage()

if not generate_icicle and icicle_file is not None:
    print("The -i option must be combined with the -g option")
    sys.exit(3)

try:
    config = oz.ozutil.parse_config(config_file)

    logging.basicConfig(level=loglevel, format=logformat)

    tdl = oz.TDL.TDL(open(args[0], 'r').read())

    guest = oz.GuestFactory.guest_factory(tdl, config, auto, output_disk,
                                          netdev, diskbus, macaddress)

    if cleanup:
        guest.cleanup_old_guest()
    else:
        guest.check_for_guest_conflict()

    try:
        guest.generate_install_media(force_download,
                                     customize or generate_icicle)
        try:
            guest.generate_diskimage(size=guest.disksize, force=force_download)
            libvirt_xml = guest.install(timeout, force_download)
        except:
            guest.cleanup_old_guest()
            raise
    finally:
        guest.cleanup_install()

    if customize and generate_icicle:
        print(guest.customize_and_generate_icicle(libvirt_xml))
    elif customize:
        guest.customize(libvirt_xml)
    elif generate_icicle:
        icicle_xml = guest.generate_icicle(libvirt_xml)
        if icicle_file is None:
            print(icicle_xml)
        else:
            open(icicle_file, 'w').write(icicle_xml)
            print("ICICLE XML was written to " + icicle_file)

    if filename is None:
        filename = guest.name + time.strftime("%b_%d_%Y-%H:%M:%S")
    open(filename, 'w').write(libvirt_xml)
    print("Libvirt XML was written to " + filename)
except Exception as exc:
    if loglevel > logging.DEBUG:
        print("")
        print("ERROR: %s" % (str(exc)))
        print("")
        print("(use -d3 to get the full backtrace)")
        print("")
    else:
        raise