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, errors
  24
  25 DEFAULT_GSITECONF = '/etc/mic/mic.conf'
  26
  27 class ConfigMgr(object):
  28     DEFAULTS = {'common': {},
  29                 'create': {
  30                     "tmpdir": '/var/tmp/mic',
  31                     "cachedir": '/var/tmp/mic/cache',
  32                     "outdir": './mic-output',
  33                     "arch": None, # None means auto-detect
  34                     "pkgmgr": "yum",
  35                     "name": "output",
  36                     "ksfile": None,
  37                     "ks": None,
  38                     "repomd": None,
  39                     "local_pkgs_path": None,
  40                     "release": None,
  41                     "logfile": None,
  42                     "record_pkgs": [],
  43                     "compress_disk_image": None,
  44                     "distro_name": "Default Distribution",
  45                     "name_prefix": None,
  46                 },
  47                 'chroot': {},
  48                 'convert': {},
  49                }
  50
  51     # make the manager class as singleton
  52     _instance = None
  53     def __new__(cls, *args, **kwargs):
  54         if not cls._instance:
  55             cls._instance = super(ConfigMgr, cls).__new__(cls, *args, **kwargs)
  56
  57         return cls._instance
  58
  59     def __init__(self, ksconf=None, siteconf=None):
  60         # reset config options
  61         self.reset()
  62
  63         if not siteconf:
  64             # initial options from siteconf
  65             self._siteconf = DEFAULT_GSITECONF
  66
  67     def reset(self):
  68         self.__ksconf = None
  69         self.__siteconf = None
  70
  71         # initialize the values with defaults
  72         for sec, vals in self.DEFAULTS.iteritems():
  73             setattr(self, sec, vals)
  74
  75     def __set_siteconf(self, siteconf):
  76         try:
  77             self.__siteconf = siteconf
  78             self._parse_siteconf(siteconf)
  79         except ConfigParser.Error, error:
  80             raise errors.ConfigError("%s" % error)
  81     def __get_siteconf(self):
  82         return self.__siteconf
  83     _siteconf = property(__get_siteconf, __set_siteconf)
  84
  85     def __set_ksconf(self, ksconf):
  86         if not os.path.isfile(ksconf):
  87             msger.error('Cannot find ks file: %s' % ksconf)
  88
  89         self.__ksconf = ksconf
  90         self._parse_kickstart(ksconf)
  91     def __get_ksconf(self):
  92         return self.__ksconf
  93     _ksconf = property(__get_ksconf, __set_ksconf)
  94
  95     def _parse_siteconf(self, siteconf):
  96         if not siteconf:
  97             return
  98
  99         if not os.path.exists(siteconf):
 100             raise errors.ConfigError("Failed to find config file: %s" \
 101                                      % siteconf)
 102
 103         parser = ConfigParser.SafeConfigParser()
 104         parser.read(siteconf)
 105
 106         for section in parser.sections():
 107             if section in self.DEFAULTS.keys():
 108                 getattr(self, section).update(dict(parser.items(section)))
 109
 110     def _selinux_check(self, arch, ks):
 111         """
 112         If a user needs to use btrfs or creates ARM image,
 113         selinux must be disabled at start.
 114         """
 115         for path in ["/usr/sbin/getenforce",
 116                      "/usr/bin/getenforce",
 117                      "/sbin/getenforce",
 118                      "/bin/getenforce",
 119                      "/usr/local/sbin/getenforce",
 120                      "/usr/locla/bin/getenforce"
 121                      ]:
 122             if os.path.exists(path):
 123                 selinux_status = runner.outs([path])
 124                 if arch and arch.startswith("arm") \
 125                         and selinux_status == "Enforcing":
 126                     raise errors.ConfigError("Can't create arm image if "\
 127                           "selinux is enabled, please disable it and try again")
 128
 129                 use_btrfs = False
 130                 for part in ks.handler.partition.partitions:
 131                     if part.fstype == "btrfs":
 132                         use_btrfs = True
 133                         break
 134
 135                 if use_btrfs and selinux_status == "Enforcing":
 136                     raise errors.ConfigError("Can't create image using btrfs "\
 137                                           "filesystem if selinux is enabled, "\
 138                                           "please disable it and try again")
 139                 break
 140
 141     def _parse_kickstart(self, ksconf=None):
 142         if not ksconf:
 143             return
 144
 145         ks = kickstart.read_kickstart(ksconf)
 146
 147         self.create['ks'] = ks
 148         self.create['name'] = os.path.splitext(os.path.basename(ksconf))[0]
 149
 150         if self.create['name_prefix']:
 151             self.create['name'] = "%s-%s" % (self.create['name_prefix'],
 152                                              self.create['name'])
 153
 154         self._selinux_check (self.create['arch'], ks)
 155
 156         msger.info("Retrieving repo metadata:")
 157         ksrepos = misc.get_repostrs_from_ks(ks)
 158         self.create['repomd'] = misc.get_metadata_from_repos(ksrepos,
 159                                                         self.create['cachedir'])
 160         msger.raw(" DONE")
 161
 162         target_archlist, archlist = misc.get_arch(self.create['repomd'])
 163         if self.create['arch']:
 164             if self.create['arch'] not in archlist:
 165                 raise errors.ConfigError("Invalid arch %s for repository. "\
 166                           "Valid arches: %s" % (self.create['arch'],
 167                                                 ', '.join(archlist)))
 168         else:
 169             if len(target_archlist) == 1:
 170                 self.create['arch'] = str(target_archlist[0])
 171                 msger.info("\nUse detected arch %s." % target_archlist[0])
 172             else:
 173                 raise errors.ConfigError("Please specify a valid arch, "\
 174                                          "your choise can be: %s" \
 175                                          % ', '.join(archlist))
 176
 177         kickstart.resolve_groups(self.create, self.create['repomd'])
 178
 179 configmgr = ConfigMgr()