733baf1a8b
often it is convenient to classify a distro as being part of an operating system family. for instance, file templates may be identical for both debian and ubuntu, but to support this under the current templating code, one would need multiple templates for the same code. similarly, configuration handlers often fall into the same bucket: the configuraton is known to work/has been tested on a particular family of operating systems. right now this is handled with a declaration like: distros = ['fedora', 'rhel'] this fix seeks to address both of these issues. it allows for the simplification of the above line to: osfamilies = ['redhat'] and provides a mechanism for operating system family templates.
318 lines
11 KiB
Python
318 lines
11 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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# Author: Joshua Harlow <harlowja@yahoo-inc.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os
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from cloudinit import distros
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from cloudinit.distros.parsers.resolv_conf import ResolvConf
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from cloudinit.distros.parsers.sys_conf import SysConf
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from cloudinit import helpers
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from cloudinit import log as logging
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from cloudinit import util
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from cloudinit.settings import PER_INSTANCE
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LOG = logging.getLogger(__name__)
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def _make_sysconfig_bool(val):
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if val:
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return 'yes'
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else:
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return 'no'
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class Distro(distros.Distro):
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# See: http://tiny.cc/6r99fw
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clock_conf_fn = "/etc/sysconfig/clock"
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locale_conf_fn = '/etc/sysconfig/i18n'
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network_conf_fn = "/etc/sysconfig/network"
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hostname_conf_fn = "/etc/sysconfig/network"
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network_script_tpl = '/etc/sysconfig/network-scripts/ifcfg-%s'
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resolve_conf_fn = "/etc/resolv.conf"
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tz_local_fn = "/etc/localtime"
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tz_zone_dir = "/usr/share/zoneinfo"
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def __init__(self, name, cfg, paths):
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distros.Distro.__init__(self, name, cfg, paths)
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# This will be used to restrict certain
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# calls from repeatly happening (when they
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# should only happen say once per instance...)
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self._runner = helpers.Runners(paths)
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self.osfamily = 'redhat'
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def install_packages(self, pkglist):
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self.package_command('install', pkglist)
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def _adjust_resolve(self, dns_servers, search_servers):
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try:
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r_conf = ResolvConf(util.load_file(self.resolve_conf_fn))
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r_conf.parse()
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except IOError:
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util.logexc(LOG,
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"Failed at parsing %s reverting to an empty instance",
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self.resolve_conf_fn)
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r_conf = ResolvConf('')
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r_conf.parse()
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if dns_servers:
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for s in dns_servers:
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try:
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r_conf.add_nameserver(s)
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except ValueError:
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util.logexc(LOG, "Failed at adding nameserver %s", s)
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if search_servers:
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for s in search_servers:
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try:
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r_conf.add_search_domain(s)
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except ValueError:
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util.logexc(LOG, "Failed at adding search domain %s", s)
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util.write_file(self.resolve_conf_fn, str(r_conf), 0644)
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def _write_network(self, settings):
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# TODO(harlowja) fix this... since this is the ubuntu format
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entries = translate_network(settings)
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LOG.debug("Translated ubuntu style network settings %s into %s",
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settings, entries)
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# Make the intermediate format as the rhel format...
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nameservers = []
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searchservers = []
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dev_names = entries.keys()
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for (dev, info) in entries.iteritems():
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net_fn = self.network_script_tpl % (dev)
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net_cfg = {
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'DEVICE': dev,
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'NETMASK': info.get('netmask'),
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'IPADDR': info.get('address'),
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'BOOTPROTO': info.get('bootproto'),
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'GATEWAY': info.get('gateway'),
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'BROADCAST': info.get('broadcast'),
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'MACADDR': info.get('hwaddress'),
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'ONBOOT': _make_sysconfig_bool(info.get('auto')),
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}
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self._update_sysconfig_file(net_fn, net_cfg)
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if 'dns-nameservers' in info:
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nameservers.extend(info['dns-nameservers'])
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if 'dns-search' in info:
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searchservers.extend(info['dns-search'])
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if nameservers or searchservers:
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self._adjust_resolve(nameservers, searchservers)
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if dev_names:
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net_cfg = {
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'NETWORKING': _make_sysconfig_bool(True),
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}
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self._update_sysconfig_file(self.network_conf_fn, net_cfg)
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return dev_names
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def _update_sysconfig_file(self, fn, adjustments, allow_empty=False):
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if not adjustments:
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return
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(exists, contents) = self._read_conf(fn)
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updated_am = 0
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for (k, v) in adjustments.items():
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if v is None:
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continue
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v = str(v)
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if len(v) == 0 and not allow_empty:
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continue
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contents[k] = v
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updated_am += 1
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if updated_am:
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lines = [
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str(contents),
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]
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if not exists:
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lines.insert(0, util.make_header())
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util.write_file(fn, "\n".join(lines), 0644)
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def apply_locale(self, locale, out_fn=None):
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if not out_fn:
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out_fn = self.locale_conf_fn
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locale_cfg = {
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'LANG': locale,
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}
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self._update_sysconfig_file(out_fn, locale_cfg)
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def _write_hostname(self, hostname, out_fn):
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host_cfg = {
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'HOSTNAME': hostname,
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}
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self._update_sysconfig_file(out_fn, host_cfg)
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def _select_hostname(self, hostname, fqdn):
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# See: http://bit.ly/TwitgL
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# Should be fqdn if we can use it
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if fqdn:
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return fqdn
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return hostname
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def _read_system_hostname(self):
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return (self.network_conf_fn,
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self._read_hostname(self.network_conf_fn))
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def _read_hostname(self, filename, default=None):
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(_exists, contents) = self._read_conf(filename)
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if 'HOSTNAME' in contents:
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return contents['HOSTNAME']
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else:
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return default
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def _read_conf(self, fn):
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exists = False
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try:
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contents = util.load_file(fn).splitlines()
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exists = True
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except IOError:
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contents = []
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return (exists,
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SysConf(contents))
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def _bring_up_interfaces(self, device_names):
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if device_names and 'all' in device_names:
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raise RuntimeError(('Distro %s can not translate '
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'the device name "all"') % (self.name))
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return distros.Distro._bring_up_interfaces(self, device_names)
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def set_timezone(self, tz):
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# TODO(harlowja): move this code into
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# the parent distro...
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tz_file = os.path.join(self.tz_zone_dir, str(tz))
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if not os.path.isfile(tz_file):
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raise RuntimeError(("Invalid timezone %s,"
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" no file found at %s") % (tz, tz_file))
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# Adjust the sysconfig clock zone setting
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clock_cfg = {
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'ZONE': str(tz),
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}
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self._update_sysconfig_file(self.clock_conf_fn, clock_cfg)
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# This ensures that the correct tz will be used for the system
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util.copy(tz_file, self.tz_local_fn)
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def package_command(self, command, args=None):
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cmd = ['yum']
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# If enabled, then yum will be tolerant of errors on the command line
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# with regard to packages.
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# For example: if you request to install foo, bar and baz and baz is
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# installed; yum won't error out complaining that baz is already
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# installed.
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cmd.append("-t")
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# Determines whether or not yum prompts for confirmation
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# of critical actions. We don't want to prompt...
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cmd.append("-y")
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cmd.append(command)
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if args:
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cmd.extend(args)
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# Allow the output of this to flow outwards (ie not be captured)
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util.subp(cmd, capture=False)
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def update_package_sources(self):
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self._runner.run("update-sources", self.package_command,
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["makecache"], freq=PER_INSTANCE)
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# This is a util function to translate a ubuntu /etc/network/interfaces 'blob'
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# to a rhel equiv. that can then be written to /etc/sysconfig/network-scripts/
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# TODO(harlowja) remove when we have python-netcf active...
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def translate_network(settings):
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# Get the standard cmd, args from the ubuntu format
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entries = []
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for line in settings.splitlines():
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line = line.strip()
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if not line or line.startswith("#"):
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continue
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split_up = line.split(None, 1)
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if len(split_up) <= 1:
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continue
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entries.append(split_up)
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# Figure out where each iface section is
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ifaces = []
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consume = {}
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for (cmd, args) in entries:
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if cmd == 'iface':
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if consume:
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ifaces.append(consume)
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consume = {}
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consume[cmd] = args
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else:
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consume[cmd] = args
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# Check if anything left over to consume
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absorb = False
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for (cmd, args) in consume.iteritems():
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if cmd == 'iface':
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absorb = True
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if absorb:
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ifaces.append(consume)
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# Now translate
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real_ifaces = {}
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for info in ifaces:
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if 'iface' not in info:
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continue
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iface_details = info['iface'].split(None)
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dev_name = None
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if len(iface_details) >= 1:
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dev = iface_details[0].strip().lower()
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if dev:
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dev_name = dev
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if not dev_name:
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continue
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iface_info = {}
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if len(iface_details) >= 3:
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proto_type = iface_details[2].strip().lower()
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# Seems like this can be 'loopback' which we don't
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# really care about
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if proto_type in ['dhcp', 'static']:
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iface_info['bootproto'] = proto_type
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# These can just be copied over
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for k in ['netmask', 'address', 'gateway', 'broadcast']:
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if k in info:
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val = info[k].strip().lower()
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if val:
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iface_info[k] = val
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# Name server info provided??
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if 'dns-nameservers' in info:
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iface_info['dns-nameservers'] = info['dns-nameservers'].split()
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# Name server search info provided??
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if 'dns-search' in info:
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iface_info['dns-search'] = info['dns-search'].split()
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# Is any mac address spoofing going on??
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if 'hwaddress' in info:
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hw_info = info['hwaddress'].lower().strip()
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hw_split = hw_info.split(None, 1)
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if len(hw_split) == 2 and hw_split[0].startswith('ether'):
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hw_addr = hw_split[1]
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if hw_addr:
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iface_info['hwaddress'] = hw_addr
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real_ifaces[dev_name] = iface_info
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# Check for those that should be started on boot via 'auto'
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for (cmd, args) in entries:
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if cmd == 'auto':
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# Seems like auto can be like 'auto eth0 eth0:1' so just get the
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# first part out as the device name
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args = args.split(None)
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if not args:
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continue
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dev_name = args[0].strip().lower()
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if dev_name in real_ifaces:
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real_ifaces[dev_name]['auto'] = True
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return real_ifaces
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