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#!/usr/bin/env python
# Authors: Cedric Bosdonnat <cbosdonnat@suse.com>
#
# Copyright (C) 2017 SUSE, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program 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 General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Main executable file which process input arguments
and calls corresponding methods on appropriate object.
"""
import argparse
import gettext
import logging
import sys
import os
from textwrap import dedent
try:
from urlparse import urlparse
except ImportError:
from urllib.parse import urlparse
from virtBootstrap import sources
from virtBootstrap import progress
from virtBootstrap import utils
gettext.bindtextdomain("virt-bootstrap", "/usr/share/locale")
gettext.textdomain("virt-bootstrap")
try:
gettext.install("virt-bootstrap",
localedir="/usr/share/locale",
codeset='utf-8')
except IOError:
try:
import __builtin__
# pylint: disable=undefined-variable
__builtin__.__dict__['_'] = unicode
except ImportError:
import builtin
builtin.__dict__['_'] = str
# pylint: disable=invalid-name
# Create logger
logger = logging.getLogger('virtBootstrap.virt_bootstrap')
def get_source(source_type):
"""
Get object which match the source type
"""
try:
class_name = "%sSource" % source_type.capitalize()
clazz = getattr(sources, class_name)
return clazz
except Exception:
raise Exception("Invalid image URL scheme: '%s'" % source_type)
def parse_idmap(idmap):
"""
Parse user input to 'start', 'target' and 'count' values.
Example:
['0:1000:10', '500:500:10']
is converted to:
[[0, 1000, 10], [500, 500, 10]]
"""
if not isinstance(idmap, list) or idmap == []:
return None
try:
idmap_list = []
for x in idmap:
start, target, count = x.split(':')
idmap_list.append([int(start), int(target), int(count)])
return idmap_list
except Exception:
raise ValueError("Invalid UID/GID mapping value: %s" % idmap)
# pylint: disable=too-many-arguments
def bootstrap(uri, dest,
fmt=utils.DEFAULT_OUTPUT_FORMAT,
username=None,
password=None,
root_password=None,
uid_map=None,
gid_map=None,
not_secure=False,
no_cache=False,
progress_cb=None):
"""
Get source object and call unpack method
"""
# Get instance of progress storing module
prog = progress.Progress(progress_cb)
uri = urlparse(uri)
source = get_source(uri.scheme or 'file')
if not os.path.exists(dest):
os.makedirs(dest)
elif not os.path.isdir(dest): # Show error if not directory
logger.error("Destination path '%s' is not directory.", dest)
sys.exit(1)
elif not os.access(dest, os.W_OK): # Check write permissions
logger.error("No write permissions on destination path '%s'", dest)
sys.exit(1)
source(uri=uri,
fmt=fmt,
username=username,
password=password,
not_secure=not_secure,
no_cache=no_cache,
progress=prog).unpack(dest)
if root_password is not None:
logger.info("Setting password of the root account")
utils.set_root_password(fmt, dest, root_password)
if fmt == "dir" and uid_map or gid_map:
logger.info("Mapping UID/GID")
utils.mapping_uid_gid(dest, uid_map, gid_map)
def set_logging_conf(loglevel=None):
"""
Set format and logging level
"""
# Get logger
module_logger = logging.getLogger('virtBootstrap')
# Create console handler
console_handler = logging.StreamHandler()
# Set logging format
log_format = ('%(levelname)-8s: %(message)s')
console_handler.setFormatter(logging.Formatter(log_format))
# Add the handlers to logger
module_logger.addHandler(console_handler)
# Set logging level
module_logger.setLevel(loglevel or logging.INFO)
def main():
parser = argparse.ArgumentParser(
description=_("Container bootstrapping tool"),
formatter_class=argparse.RawDescriptionHelpFormatter,
epilog=dedent(_('''
Example supported URI formats:
----------------------------------------
docker://ubuntu:latest
docker://docker.io/fedora
docker://privateregistry:5000/image
file:///path/to/local/rootfs.tar.xz
----------------------------------------
''')))
parser.add_argument("uri",
help=_("URI of container image"))
parser.add_argument("dest",
help=_("Destination folder"))
parser.add_argument("--not-secure", action='store_true',
help=_("Ignore HTTPS errors"))
parser.add_argument("-u", "--username", default=None,
help=_("Username for accessing the source registry"))
parser.add_argument("-p", "--password", default=None,
help=_("Password for accessing the source registry"))
parser.add_argument("--root-password", default=None,
help=_("Set root password"))
parser.add_argument("--uidmap", default=None, action='append',
metavar="<start>:<target>:<count>",
help=_("Map UIDs"))
parser.add_argument("--gidmap", default=None, action='append',
metavar="<start>:<target>:<count>",
help=_("Map GIDs"))
parser.add_argument("--idmap", default=None, action='append',
metavar="<start>:<target>:<count>",
help=_("Map both UIDs/GIDs"))
parser.add_argument("--no-cache", action="store_true",
help=_("Do not store downloaded Docker images"))
parser.add_argument("-f", "--format", default=utils.DEFAULT_OUTPUT_FORMAT,
choices=['dir', 'qcow2'],
help=_("Format to be used for the root filesystem"))
parser.add_argument("-d", "--debug", action="store_const", dest="loglevel",
const=logging.DEBUG, help=_("Show debug messages"))
parser.add_argument("-q", "--quiet", action="store_const", dest="loglevel",
const=logging.WARNING,
help=_("Don't print progress messages"))
parser.add_argument("--status-only", action="store_const",
const=utils.write_progress,
help=_("Show only progress information"))
try:
args = parser.parse_args()
if not args.status_only:
# Configure logging lovel/format
set_logging_conf(args.loglevel)
uid_map = parse_idmap(args.idmap) if args.idmap else []
gid_map = list(uid_map) if args.idmap else []
if args.uidmap:
uid_map += parse_idmap(args.uidmap)
if args.gidmap:
gid_map += parse_idmap(args.gidmap)
# do the job here!
bootstrap(uri=args.uri,
dest=args.dest,
fmt=args.format,
username=args.username,
password=args.password,
root_password=args.root_password,
uid_map=uid_map,
gid_map=gid_map,
not_secure=args.not_secure,
no_cache=args.no_cache,
progress_cb=args.status_only)
sys.exit(0)
except KeyboardInterrupt:
sys.exit(0)
except ValueError as err:
sys.stderr.write("%s: %s\n" % (sys.argv[0], err))
sys.stderr.flush()
sys.exit(1)
if __name__ == '__main__':
sys.exit(main())
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