374 lines
13 KiB
Python
374 lines
13 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 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 import version
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from cloudinit.settings import PER_INSTANCE
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LOG = logging.getLogger(__name__)
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NETWORK_FN_TPL = '/etc/sysconfig/network-scripts/ifcfg-%s'
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# See: http://tiny.cc/6r99fw
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# For what alot of these files that are being written
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# are and the format of them
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# This library is used to parse/write
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# out the various sysconfig files edited
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#
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# It has to be slightly modified though
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# to ensure that all values are quoted
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# since these configs are usually sourced into
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# bash scripts...
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from configobj import ConfigObj
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# See: http://tiny.cc/oezbgw
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D_QUOTE_CHARS = {
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"\"": "\\\"",
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"(": "\\(",
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")": "\\)",
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"$": '\$',
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'`': '\`',
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}
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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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def _make_header():
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ci_ver = version.version_string()
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return '# Created by cloud-init v. %s' % (ci_ver)
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class Distro(distros.Distro):
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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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def install_packages(self, pkglist):
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self.package_command('install', pkglist)
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def _write_resolve(self, dns_servers, search_servers):
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contents = []
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if dns_servers:
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for s in dns_servers:
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contents.append("nameserver %s" % (s))
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if search_servers:
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contents.append("search %s" % (" ".join(search_servers)))
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if contents:
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contents.insert(0, _make_header())
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util.write_file("/etc/resolv.conf", "\n".join(contents), 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 = NETWORK_FN_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._write_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("/etc/sysconfig/network", 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 = contents.write()
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if not exists:
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lines.insert(0, _make_header())
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util.write_file(fn, "\n".join(lines), 0644)
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def set_hostname(self, hostname):
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self._write_hostname(hostname, '/etc/sysconfig/network')
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LOG.debug("Setting hostname to %s", hostname)
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util.subp(['hostname', hostname])
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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 = '/etc/sysconfig/i18n'
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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 update_hostname(self, hostname, prev_file):
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hostname_prev = self._read_hostname(prev_file)
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hostname_in_sys = self._read_hostname("/etc/sysconfig/network")
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update_files = []
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if not hostname_prev or hostname_prev != hostname:
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update_files.append(prev_file)
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if (not hostname_in_sys or
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(hostname_in_sys == hostname_prev
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and hostname_in_sys != hostname)):
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update_files.append("/etc/sysconfig/network")
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for fn in update_files:
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try:
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self._write_hostname(hostname, fn)
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except:
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util.logexc(LOG, "Failed to write hostname %s to %s",
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hostname, fn)
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if (hostname_in_sys and hostname_prev and
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hostname_in_sys != hostname_prev):
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LOG.debug(("%s differs from /etc/sysconfig/network."
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" Assuming user maintained hostname."), prev_file)
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if "/etc/sysconfig/network" in update_files:
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# Only do this if we are running in non-adjusted root mode
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LOG.debug("Setting hostname to %s", hostname)
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util.subp(['hostname', hostname])
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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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if os.path.isfile(fn):
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contents = util.load_file(fn).splitlines()
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exists = True
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else:
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contents = []
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return (exists, QuotingConfigObj(contents))
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def set_timezone(self, tz):
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tz_file = os.path.join("/usr/share/zoneinfo", 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': tz,
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}
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self._update_sysconfig_file("/etc/sysconfig/clock", 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, "/etc/localtime")
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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 class helps adjust the configobj
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# writing to ensure that when writing a k/v
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# on a line, that they are properly quoted
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# and have no spaces between the '=' sign.
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# - This is mainly due to the fact that
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# the sysconfig scripts are often sourced
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# directly into bash/shell scripts so ensure
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# that it works for those types of use cases.
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class QuotingConfigObj(ConfigObj):
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def __init__(self, lines):
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ConfigObj.__init__(self, lines,
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interpolation=False,
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write_empty_values=True)
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def _quote_posix(self, text):
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if not text:
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return ''
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for (k, v) in D_QUOTE_CHARS.iteritems():
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text = text.replace(k, v)
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return '"%s"' % (text)
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def _quote_special(self, text):
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if text.lower() in ['yes', 'no', 'true', 'false']:
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return text
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else:
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return self._quote_posix(text)
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def _write_line(self, indent_string, entry, this_entry, comment):
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# Ensure it is formatted fine for
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# how these sysconfig scripts are used
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val = self._decode_element(self._quote(this_entry))
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# Single quoted strings should
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# always work.
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if not val.startswith("'"):
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# Perform any special quoting
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val = self._quote_special(val)
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key = self._decode_element(self._quote(entry, multiline=False))
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cmnt = self._decode_element(comment)
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return '%s%s%s%s%s' % (indent_string,
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key,
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"=",
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val,
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cmnt)
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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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