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, re
  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                     "bootstrapdir": '/var/tmp/mic/bootstrap',
  36
  37                     "arch": None, # None means auto-detect
  38                     "pkgmgr": "yum",
  39                     "name": "output",
  40                     "ksfile": None,
  41                     "ks": None,
  42                     "repomd": None,
  43                     "local_pkgs_path": None,
  44                     "release": None,
  45                     "logfile": None,
  46                     "record_pkgs": [],
  47                     "rpmver": None,
  48                     "compress_disk_image": None,
  49                     "name_prefix": None,
  50                     "proxy": None,
  51                     "no_proxy": None,
  52                     "copy_kernel": False,
  53
  54                     "runtime": None,
  55                 },
  56                 'chroot': {
  57                     "saveto": None,
  58                 },
  59                 'convert': {
  60                     "shell": False,
  61                 },
  62                 'bootstraps': {},
  63                }
  64
  65     # make the manager class as singleton
  66     _instance = None
  67     def __new__(cls, *args, **kwargs):
  68         if not cls._instance:
  69             cls._instance = super(ConfigMgr, cls).__new__(cls, *args, **kwargs)
  70
  71         return cls._instance
  72
  73     def __init__(self, ksconf=None, siteconf=None):
  74         # reset config options
  75         self.reset()
  76
  77         # initial options from siteconf
  78         if siteconf:
  79             self._siteconf = siteconf
  80         else:
  81             # use default site config
  82             self._siteconf = DEFAULT_GSITECONF
  83
  84         if ksconf:
  85             self._ksconf = ksconf
  86
  87     def reset(self):
  88         self.__ksconf = None
  89         self.__siteconf = None
  90
  91         # initialize the values with defaults
  92         for sec, vals in self.DEFAULTS.iteritems():
  93             setattr(self, sec, vals)
  94
  95     def __set_siteconf(self, siteconf):
  96         try:
  97             self.__siteconf = siteconf
  98             self._parse_siteconf(siteconf)
  99         except ConfigParser.Error, error:
 100             raise errors.ConfigError("%s" % error)
 101     def __get_siteconf(self):
 102         return self.__siteconf
 103     _siteconf = property(__get_siteconf, __set_siteconf)
 104
 105     def __set_ksconf(self, ksconf):
 106         if not os.path.isfile(ksconf):
 107             msger.error('Cannot find ks file: %s' % ksconf)
 108
 109         self.__ksconf = ksconf
 110         self._parse_kickstart(ksconf)
 111     def __get_ksconf(self):
 112         return self.__ksconf
 113     _ksconf = property(__get_ksconf, __set_ksconf)
 114
 115     def _parse_siteconf(self, siteconf):
 116         if not siteconf:
 117             return
 118
 119         if not os.path.exists(siteconf):
 120             raise errors.ConfigError("Failed to find config file: %s" \
 121                                      % siteconf)
 122
 123         parser = ConfigParser.SafeConfigParser()
 124         parser.read(siteconf)
 125
 126         for section in parser.sections():
 127             if section in self.DEFAULTS:
 128                 getattr(self, section).update(dict(parser.items(section)))
 129
 130         # append common section items to other sections
 131         for section in self.DEFAULTS.keys():
 132             if section != "common" and not section.startswith('bootstrap'):
 133                 getattr(self, section).update(self.common)
 134
 135         # check and normalize the scheme of proxy url
 136         if self.create['proxy']:
 137             m = re.match('^(\w+)://.*', self.create['proxy'])
 138             if m:
 139                 scheme = m.group(1)
 140                 if scheme not in ('http', 'https', 'ftp', 'socks'):
 141                     msger.error("%s: proxy scheme is incorrect" % siteconf)
 142             else:
 143                 msger.warning("%s: proxy url w/o scheme, use http as default"
 144                               % siteconf)
 145                 self.create['proxy'] = "http://" + self.create['proxy']
 146
 147         proxy.set_proxies(self.create['proxy'], self.create['no_proxy'])
 148
 149         for section in parser.sections():
 150             if section.startswith('bootstrap'):
 151                 name = section
 152                 repostr = {}
 153                 for option in parser.options(section):
 154                     if option == 'name':
 155                         name = parser.get(section, 'name')
 156                         continue
 157
 158                     val = parser.get(section, option)
 159                     if '_' in option:
 160                         (reponame, repoopt) = option.split('_')
 161                         if repostr.has_key(reponame):
 162                             repostr[reponame] += "%s:%s," % (repoopt, val)
 163                         else:
 164                             repostr[reponame] = "%s:%s," % (repoopt, val)
 165                         continue
 166
 167                     if val.split(':')[0] in ('file', 'http', 'https', 'ftp'):
 168                         if repostr.has_key(option):
 169                             repostr[option] += "name:%s,baseurl:%s," % (option, val)
 170                         else:
 171                             repostr[option]  = "name:%s,baseurl:%s," % (option, val)
 172                         continue
 173
 174                 self.bootstraps[name] = repostr
 175
 176     def _selinux_check(self, arch, ks):
 177         """If a user needs to use btrfs or creates ARM image,
 178         selinux must be disabled at start.
 179         """
 180
 181         for path in ["/usr/sbin/getenforce",
 182                      "/usr/bin/getenforce",
 183                      "/sbin/getenforce",
 184                      "/bin/getenforce",
 185                      "/usr/local/sbin/getenforce",
 186                      "/usr/locla/bin/getenforce"
 187                      ]:
 188             if os.path.exists(path):
 189                 selinux_status = runner.outs([path])
 190                 if arch and arch.startswith("arm") \
 191                         and selinux_status == "Enforcing":
 192                     raise errors.ConfigError("Can't create arm image if "
 193                           "selinux is enabled, please disable it and try again")
 194
 195                 use_btrfs = False
 196                 for part in ks.handler.partition.partitions:
 197                     if part.fstype == "btrfs":
 198                         use_btrfs = True
 199                         break
 200
 201                 if use_btrfs and selinux_status == "Enforcing":
 202                     raise errors.ConfigError("Can't create image using btrfs "
 203                                            "filesystem if selinux is enabled, "
 204                                            "please disable it and try again.")
 205                 break
 206
 207     def _parse_kickstart(self, ksconf=None):
 208         if not ksconf:
 209             return
 210
 211         ks = kickstart.read_kickstart(ksconf)
 212
 213         self.create['ks'] = ks
 214         self.create['name'] = os.path.splitext(os.path.basename(ksconf))[0]
 215
 216         if self.create['name_prefix']:
 217             self.create['name'] = "%s-%s" % (self.create['name_prefix'],
 218                                              self.create['name'])
 219
 220         self._selinux_check (self.create['arch'], ks)
 221
 222         msger.info("Retrieving repo metadata:")
 223         ksrepos = misc.get_repostrs_from_ks(ks)
 224         if not ksrepos:
 225             raise errors.KsError('no valid repos found in ks file')
 226
 227         self.create['repomd'] = misc.get_metadata_from_repos(
 228                                                     ksrepos,
 229                                                     self.create['cachedir'])
 230         msger.raw(" DONE")
 231
 232         self.create['rpmver'] = misc.get_rpmver_in_repo(self.create['repomd'])
 233
 234         target_archlist, archlist = misc.get_arch(self.create['repomd'])
 235         if self.create['arch']:
 236             if self.create['arch'] not in archlist:
 237                 raise errors.ConfigError("Invalid arch %s for repository. "
 238                                   "Valid arches: %s" \
 239                                   % (self.create['arch'], ', '.join(archlist)))
 240         else:
 241             if len(target_archlist) == 1:
 242                 self.create['arch'] = str(target_archlist[0])
 243                 msger.info("\nUse detected arch %s." % target_archlist[0])
 244             else:
 245                 raise errors.ConfigError("Please specify a valid arch, "
 246                                          "the choice can be: %s" \
 247                                          % ', '.join(archlist))
 248
 249         kickstart.resolve_groups(self.create, self.create['repomd'])
 250
 251 configmgr = ConfigMgr()