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                     "rpmver": None,
  46                     "compress_disk_image": None,
  47                     "name_prefix": None,
  48                     "proxy": None,
  49                     "no_proxy": None,
  50                 },
  51                 'chroot': {},
  52                 'convert': {},
  53                }
  54
  55     # make the manager class as singleton
  56     _instance = None
  57     def __new__(cls, *args, **kwargs):
  58         if not cls._instance:
  59             cls._instance = super(ConfigMgr, cls).__new__(cls, *args, **kwargs)
  60
  61         return cls._instance
  62
  63     def __init__(self, ksconf=None, siteconf=None):
  64         # reset config options
  65         self.reset()
  66
  67         # initial options from siteconf
  68         if siteconf:
  69             self._siteconf = siteconf
  70         else:
  71             # use default site config
  72             self._siteconf = DEFAULT_GSITECONF
  73
  74         if ksconf:
  75             self._ksconf = ksconf
  76
  77     def reset(self):
  78         self.__ksconf = None
  79         self.__siteconf = None
  80
  81         # initialize the values with defaults
  82         for sec, vals in self.DEFAULTS.iteritems():
  83             setattr(self, sec, vals)
  84
  85     def __set_siteconf(self, siteconf):
  86         try:
  87             self.__siteconf = siteconf
  88             self._parse_siteconf(siteconf)
  89         except ConfigParser.Error, error:
  90             raise errors.ConfigError("%s" % error)
  91     def __get_siteconf(self):
  92         return self.__siteconf
  93     _siteconf = property(__get_siteconf, __set_siteconf)
  94
  95     def __set_ksconf(self, ksconf):
  96         if not os.path.isfile(ksconf):
  97             msger.error('Cannot find ks file: %s' % ksconf)
  98
  99         self.__ksconf = ksconf
 100         self._parse_kickstart(ksconf)
 101     def __get_ksconf(self):
 102         return self.__ksconf
 103     _ksconf = property(__get_ksconf, __set_ksconf)
 104
 105     def _parse_siteconf(self, siteconf):
 106         if not siteconf:
 107             return
 108
 109         if not os.path.exists(siteconf):
 110             raise errors.ConfigError("Failed to find config file: %s" \
 111                                      % siteconf)
 112
 113         parser = ConfigParser.SafeConfigParser()
 114         parser.read(siteconf)
 115
 116         for section in parser.sections():
 117             if section in self.DEFAULTS:
 118                 getattr(self, section).update(dict(parser.items(section)))
 119
 120         # append common section items to other sections
 121         for section in self.DEFAULTS.keys():
 122             if section != "common":
 123                 getattr(self, section).update(self.common)
 124
 125         proxy.set_proxies(self.create['proxy'], self.create['no_proxy'])
 126
 127     def _selinux_check(self, arch, ks):
 128         """If a user needs to use btrfs or creates ARM image,
 129         selinux must be disabled at start.
 130         """
 131
 132         for path in ["/usr/sbin/getenforce",
 133                      "/usr/bin/getenforce",
 134                      "/sbin/getenforce",
 135                      "/bin/getenforce",
 136                      "/usr/local/sbin/getenforce",
 137                      "/usr/locla/bin/getenforce"
 138                      ]:
 139             if os.path.exists(path):
 140                 selinux_status = runner.outs([path])
 141                 if arch and arch.startswith("arm") \
 142                         and selinux_status == "Enforcing":
 143                     raise errors.ConfigError("Can't create arm image if "
 144                           "selinux is enabled, please disable it and try again")
 145
 146                 use_btrfs = False
 147                 for part in ks.handler.partition.partitions:
 148                     if part.fstype == "btrfs":
 149                         use_btrfs = True
 150                         break
 151
 152                 if use_btrfs and selinux_status == "Enforcing":
 153                     raise errors.ConfigError("Can't create image using btrfs "
 154                                            "filesystem if selinux is enabled, "
 155                                            "please disable it and try again.")
 156                 break
 157
 158     def _parse_kickstart(self, ksconf=None):
 159         if not ksconf:
 160             return
 161
 162         ks = kickstart.read_kickstart(ksconf)
 163
 164         self.create['ks'] = ks
 165         self.create['name'] = os.path.splitext(os.path.basename(ksconf))[0]
 166
 167         if self.create['name_prefix']:
 168             self.create['name'] = "%s-%s" % (self.create['name_prefix'],
 169                                              self.create['name'])
 170
 171         self._selinux_check (self.create['arch'], ks)
 172
 173         msger.info("Retrieving repo metadata:")
 174         ksrepos = misc.get_repostrs_from_ks(ks)
 175         self.create['repomd'] = misc.get_metadata_from_repos(
 176                                                     ksrepos,
 177                                                     self.create['cachedir'])
 178         msger.raw(" DONE")
 179
 180         self.create['rpmver'] = misc.get_rpmver_in_repo(self.create['repomd'])
 181
 182         target_archlist, archlist = misc.get_arch(self.create['repomd'])
 183         if self.create['arch']:
 184             if self.create['arch'] not in archlist:
 185                 raise errors.ConfigError("Invalid arch %s for repository. "
 186                                   "Valid arches: %s" \
 187                                   % (self.create['arch'], ', '.join(archlist)))
 188         else:
 189             if len(target_archlist) == 1:
 190                 self.create['arch'] = str(target_archlist[0])
 191                 msger.info("\nUse detected arch %s." % target_archlist[0])
 192             else:
 193                 raise errors.ConfigError("Please specify a valid arch, "
 194                                          "your choise can be: %s" \
 195                                          % ', '.join(archlist))
 196
 197         kickstart.resolve_groups(self.create, self.create['repomd'])
 198
 199 configmgr = ConfigMgr()