mic/conf.py

   1 #!/usr/bin/python -tt
   2 #
   3 # Copyright (c) 2011 Intel, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License as published by the Free
   7 # Software Foundation; version 2 of the License
   8 #
   9 # This program is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 # for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License along
  15 # with this program; if not, write to the Free Software Foundation, Inc., 59
  16 # Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 import os
  19 import ConfigParser
  20
  21 import msger
  22 import kickstart
  23 from .utils import misc, runner, proxy, errors
  24
  25 DEFAULT_GSITECONF = '/etc/mic/mic.conf'
  26
  27 class ConfigMgr(object):
  28     DEFAULTS = {'common': {
  29                     "distro_name": "Default Distribution",
  30                 },
  31                 'create': {
  32                     "tmpdir": '/var/tmp/mic',
  33                     "cachedir": '/var/tmp/mic/cache',
  34                     "outdir": './mic-output',
  35                     "arch": None, # None means auto-detect
  36                     "pkgmgr": "yum",
  37                     "name": "output",
  38                     "ksfile": None,
  39                     "ks": None,
  40                     "repomd": None,
  41                     "local_pkgs_path": None,
  42                     "release": None,
  43                     "logfile": None,
  44                     "record_pkgs": [],
  45                     "compress_disk_image": None,
  46                     "name_prefix": None,
  47                     "proxy": None,
  48                     "no_proxy": None,
  49                 },
  50                 'chroot': {},
  51                 'convert': {},
  52                }
  53
  54     # make the manager class as singleton
  55     _instance = None
  56     def __new__(cls, *args, **kwargs):
  57         if not cls._instance:
  58             cls._instance = super(ConfigMgr, cls).__new__(cls, *args, **kwargs)
  59
  60         return cls._instance
  61
  62     def __init__(self, ksconf=None, siteconf=None):
  63         # reset config options
  64         self.reset()
  65
  66         # initial options from siteconf
  67         if siteconf:
  68             self._siteconf = siteconf
  69         else:
  70             # use default site config
  71             self._siteconf = DEFAULT_GSITECONF
  72
  73         if ksconf:
  74             self._ksconf = ksconf
  75
  76     def reset(self):
  77         self.__ksconf = None
  78         self.__siteconf = None
  79
  80         # initialize the values with defaults
  81         for sec, vals in self.DEFAULTS.iteritems():
  82             setattr(self, sec, vals)
  83
  84     def __set_siteconf(self, siteconf):
  85         try:
  86             self.__siteconf = siteconf
  87             self._parse_siteconf(siteconf)
  88         except ConfigParser.Error, error:
  89             raise errors.ConfigError("%s" % error)
  90     def __get_siteconf(self):
  91         return self.__siteconf
  92     _siteconf = property(__get_siteconf, __set_siteconf)
  93
  94     def __set_ksconf(self, ksconf):
  95         if not os.path.isfile(ksconf):
  96             msger.error('Cannot find ks file: %s' % ksconf)
  97
  98         self.__ksconf = ksconf
  99         self._parse_kickstart(ksconf)
 100     def __get_ksconf(self):
 101         return self.__ksconf
 102     _ksconf = property(__get_ksconf, __set_ksconf)
 103
 104     def _parse_siteconf(self, siteconf):
 105         if not siteconf:
 106             return
 107
 108         if not os.path.exists(siteconf):
 109             raise errors.ConfigError("Failed to find config file: %s" \
 110                                      % siteconf)
 111
 112         parser = ConfigParser.SafeConfigParser()
 113         parser.read(siteconf)
 114
 115         # append common section items to other sections
 116         for section in self.DEFAULTS.keys():
 117             if section != "common":
 118                 getattr(self, section).update(self.common)
 119
 120         for section in parser.sections():
 121             if section in self.DEFAULTS.keys():
 122                 getattr(self, section).update(dict(parser.items(section)))
 123
 124         proxy.set_proxies(self.create['proxy'], self.create['no_proxy'])
 125
 126     def _selinux_check(self, arch, ks):
 127         """If a user needs to use btrfs or creates ARM image,
 128         selinux must be disabled at start.
 129         """
 130
 131         for path in ["/usr/sbin/getenforce",
 132                      "/usr/bin/getenforce",
 133                      "/sbin/getenforce",
 134                      "/bin/getenforce",
 135                      "/usr/local/sbin/getenforce",
 136                      "/usr/locla/bin/getenforce"
 137                      ]:
 138             if os.path.exists(path):
 139                 selinux_status = runner.outs([path])
 140                 if arch and arch.startswith("arm") \
 141                         and selinux_status == "Enforcing":
 142                     raise errors.ConfigError("Can't create arm image if "
 143                           "selinux is enabled, please disable it and try again")
 144
 145                 use_btrfs = False
 146                 for part in ks.handler.partition.partitions:
 147                     if part.fstype == "btrfs":
 148                         use_btrfs = True
 149                         break
 150
 151                 if use_btrfs and selinux_status == "Enforcing":
 152                     raise errors.ConfigError("Can't create image using btrfs "
 153                                            "filesystem if selinux is enabled, "
 154                                            "please disable it and try again.")
 155                 break
 156
 157     def _parse_kickstart(self, ksconf=None):
 158         if not ksconf:
 159             return
 160
 161         ks = kickstart.read_kickstart(ksconf)
 162
 163         self.create['ks'] = ks
 164         self.create['name'] = os.path.splitext(os.path.basename(ksconf))[0]
 165
 166         if self.create['name_prefix']:
 167             self.create['name'] = "%s-%s" % (self.create['name_prefix'],
 168                                              self.create['name'])
 169
 170         self._selinux_check (self.create['arch'], ks)
 171
 172         msger.info("Retrieving repo metadata:")
 173         ksrepos = misc.get_repostrs_from_ks(ks)
 174         self.create['repomd'] = misc.get_metadata_from_repos(
 175                                                     ksrepos,
 176                                                     self.create['cachedir'])
 177         msger.raw(" DONE")
 178
 179         target_archlist, archlist = misc.get_arch(self.create['repomd'])
 180         if self.create['arch']:
 181             if self.create['arch'] not in archlist:
 182                 raise errors.ConfigError("Invalid arch %s for repository. "
 183                                   "Valid arches: %s" \
 184                                   % (self.create['arch'], ', '.join(archlist)))
 185         else:
 186             if len(target_archlist) == 1:
 187                 self.create['arch'] = str(target_archlist[0])
 188                 msger.info("\nUse detected arch %s." % target_archlist[0])
 189             else:
 190                 raise errors.ConfigError("Please specify a valid arch, "
 191                                          "your choise can be: %s" \
 192                                          % ', '.join(archlist))
 193
 194         kickstart.resolve_groups(self.create, self.create['repomd'])
 195
 196 configmgr = ConfigMgr()