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, sys, 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 def get_siteconf():
  28     mic_path = os.path.dirname(__file__)
  29
  30     m = re.match(r"(?P<prefix>.*)\/lib(64)?\/.*", mic_path)
  31     if m and m.group('prefix') != "/usr":
  32         return os.path.join(m.group('prefix'), DEFAULT_GSITECONF)
  33
  34     return DEFAULT_GSITECONF
  35
  36 class ConfigMgr(object):
  37     DEFAULTS = {'common': {
  38                     "distro_name": "Default Distribution",
  39                     "plugin_dir": "/usr/lib/mic/plugins", # TODO use prefix also?
  40                 },
  41                 'create': {
  42                     "tmpdir": '/var/tmp/mic',
  43                     "cachedir": '/var/tmp/mic/cache',
  44                     "outdir": './mic-output',
  45                     "bootstrapdir": '/var/tmp/mic/bootstrap',
  46
  47                     "arch": None, # None means auto-detect
  48                     "pkgmgr": "yum",
  49                     "name": "output",
  50                     "ksfile": None,
  51                     "ks": None,
  52                     "repomd": None,
  53                     "local_pkgs_path": None,
  54                     "release": None,
  55                     "logfile": None,
  56                     "record_pkgs": [],
  57                     "rpmver": None,
  58                     "compress_disk_image": None,
  59                     "name_prefix": None,
  60                     "proxy": None,
  61                     "no_proxy": None,
  62                     "copy_kernel": False,
  63
  64                     "runtime": None,
  65                 },
  66                 'chroot': {
  67                     "saveto": None,
  68                 },
  69                 'convert': {
  70                     "shell": False,
  71                 },
  72                 'bootstraps': {},
  73                }
  74
  75     # make the manager class as singleton
  76     _instance = None
  77     def __new__(cls, *args, **kwargs):
  78         if not cls._instance:
  79             cls._instance = super(ConfigMgr, cls).__new__(cls, *args, **kwargs)
  80
  81         return cls._instance
  82
  83     def __init__(self, ksconf=None, siteconf=None):
  84         # reset config options
  85         self.reset()
  86
  87         if not siteconf:
  88             siteconf = get_siteconf()
  89
  90         # initial options from siteconf
  91         self._siteconf = siteconf
  92
  93         if ksconf:
  94             self._ksconf = ksconf
  95
  96     def reset(self):
  97         self.__ksconf = None
  98         self.__siteconf = None
  99
 100         # initialize the values with defaults
 101         for sec, vals in self.DEFAULTS.iteritems():
 102             setattr(self, sec, vals)
 103
 104     def __set_siteconf(self, siteconf):
 105         try:
 106             self.__siteconf = siteconf
 107             self._parse_siteconf(siteconf)
 108         except ConfigParser.Error, error:
 109             raise errors.ConfigError("%s" % error)
 110     def __get_siteconf(self):
 111         return self.__siteconf
 112     _siteconf = property(__get_siteconf, __set_siteconf)
 113
 114     def __set_ksconf(self, ksconf):
 115         if not os.path.isfile(ksconf):
 116             msger.error('Cannot find ks file: %s' % ksconf)
 117
 118         self.__ksconf = ksconf
 119         self._parse_kickstart(ksconf)
 120     def __get_ksconf(self):
 121         return self.__ksconf
 122     _ksconf = property(__get_ksconf, __set_ksconf)
 123
 124     def _parse_siteconf(self, siteconf):
 125         if not siteconf:
 126             return
 127
 128         if not os.path.exists(siteconf):
 129             msger.warning("cannot read config file: %s" % siteconf)
 130             return
 131
 132         parser = ConfigParser.SafeConfigParser()
 133         parser.read(siteconf)
 134
 135         for section in parser.sections():
 136             if section in self.DEFAULTS:
 137                 getattr(self, section).update(dict(parser.items(section)))
 138
 139         # append common section items to other sections
 140         for section in self.DEFAULTS.keys():
 141             if section != "common" and not section.startswith('bootstrap'):
 142                 getattr(self, section).update(self.common)
 143
 144         # check and normalize the scheme of proxy url
 145         if self.create['proxy']:
 146             m = re.match('^(\w+)://.*', self.create['proxy'])
 147             if m:
 148                 scheme = m.group(1)
 149                 if scheme not in ('http', 'https', 'ftp', 'socks'):
 150                     msger.error("%s: proxy scheme is incorrect" % siteconf)
 151             else:
 152                 msger.warning("%s: proxy url w/o scheme, use http as default"
 153                               % siteconf)
 154                 self.create['proxy'] = "http://" + self.create['proxy']
 155
 156         proxy.set_proxies(self.create['proxy'], self.create['no_proxy'])
 157
 158         for section in parser.sections():
 159             if section.startswith('bootstrap'):
 160                 name = section
 161                 repostr = {}
 162                 for option in parser.options(section):
 163                     if option == 'name':
 164                         name = parser.get(section, 'name')
 165                         continue
 166
 167                     val = parser.get(section, option)
 168                     if '_' in option:
 169                         (reponame, repoopt) = option.split('_')
 170                         if repostr.has_key(reponame):
 171                             repostr[reponame] += "%s:%s," % (repoopt, val)
 172                         else:
 173                             repostr[reponame] = "%s:%s," % (repoopt, val)
 174                         continue
 175
 176                     if val.split(':')[0] in ('file', 'http', 'https', 'ftp'):
 177                         if repostr.has_key(option):
 178                             repostr[option] += "name:%s,baseurl:%s," % (option, val)
 179                         else:
 180                             repostr[option]  = "name:%s,baseurl:%s," % (option, val)
 181                         continue
 182
 183                 self.bootstraps[name] = repostr
 184
 185     def _selinux_check(self, arch, ks):
 186         """If a user needs to use btrfs or creates ARM image,
 187         selinux must be disabled at start.
 188         """
 189
 190         for path in ["/usr/sbin/getenforce",
 191                      "/usr/bin/getenforce",
 192                      "/sbin/getenforce",
 193                      "/bin/getenforce",
 194                      "/usr/local/sbin/getenforce",
 195                      "/usr/locla/bin/getenforce"
 196                      ]:
 197             if os.path.exists(path):
 198                 selinux_status = runner.outs([path])
 199                 if arch and arch.startswith("arm") \
 200                         and selinux_status == "Enforcing":
 201                     raise errors.ConfigError("Can't create arm image if "
 202                           "selinux is enabled, please disable it and try again")
 203
 204                 use_btrfs = False
 205                 for part in ks.handler.partition.partitions:
 206                     if part.fstype == "btrfs":
 207                         use_btrfs = True
 208                         break
 209
 210                 if use_btrfs and selinux_status == "Enforcing":
 211                     raise errors.ConfigError("Can't create image using btrfs "
 212                                            "filesystem if selinux is enabled, "
 213                                            "please disable it and try again.")
 214                 break
 215
 216     def _parse_kickstart(self, ksconf=None):
 217         if not ksconf:
 218             return
 219
 220         ks = kickstart.read_kickstart(ksconf)
 221
 222         self.create['ks'] = ks
 223         self.create['name'] = os.path.splitext(os.path.basename(ksconf))[0]
 224
 225         if self.create['name_prefix']:
 226             self.create['name'] = "%s-%s" % (self.create['name_prefix'],
 227                                              self.create['name'])
 228
 229         self._selinux_check (self.create['arch'], ks)
 230
 231         msger.info("Retrieving repo metadata:")
 232         ksrepos = misc.get_repostrs_from_ks(ks)
 233         if not ksrepos:
 234             raise errors.KsError('no valid repos found in ks file')
 235
 236         self.create['repomd'] = misc.get_metadata_from_repos(
 237                                                     ksrepos,
 238                                                     self.create['cachedir'])
 239         msger.raw(" DONE")
 240
 241         self.create['rpmver'] = misc.get_rpmver_in_repo(self.create['repomd'])
 242
 243         target_archlist, archlist = misc.get_arch(self.create['repomd'])
 244         if self.create['arch']:
 245             if self.create['arch'] not in archlist:
 246                 raise errors.ConfigError("Invalid arch %s for repository. "
 247                                   "Valid arches: %s" \
 248                                   % (self.create['arch'], ', '.join(archlist)))
 249         else:
 250             if len(target_archlist) == 1:
 251                 self.create['arch'] = str(target_archlist[0])
 252                 msger.info("\nUse detected arch %s." % target_archlist[0])
 253             else:
 254                 raise errors.ConfigError("Please specify a valid arch, "
 255                                          "the choice can be: %s" \
 256                                          % ', '.join(archlist))
 257
 258         kickstart.resolve_groups(self.create, self.create['repomd'])
 259
 260 configmgr = ConfigMgr()