# vi: ts=4 expandtab # # Copyright (C) 2012 Canonical Ltd. # Copyright (C) 2012 Hewlett-Packard Development Company, L.P. # Copyright (C) 2012 Yahoo! Inc. # # Author: Scott Moser # Author: Juerg Haefliger # Author: Joshua Harlow # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License version 3, as # published by the Free Software Foundation. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . import os from cloudinit import distros from cloudinit import helpers from cloudinit import log as logging from cloudinit import util from cloudinit.settings import PER_INSTANCE LOG = logging.getLogger(__name__) NETWORK_FN_TPL = '/etc/sysconfig/network-scripts/ifcfg-%s' # See: http://tiny.cc/6r99fw # For what alot of these files that are being written # are and the format of them # This library is used to parse/write # out the various sysconfig files edited # # It has to be slightly modified though # to ensure that all values are quoted # since these configs are usually sourced into # bash scripts... from configobj import ConfigObj # See: http://tiny.cc/oezbgw D_QUOTE_CHARS = { "\"": "\\\"", "(": "\\(", ")": "\\)", "$": '\$', '`': '\`', } class Distro(distros.Distro): def __init__(self, name, cfg, paths): distros.Distro.__init__(self, name, cfg, paths) # This will be used to restrict certain # calls from repeatly happening (when they # should only happen say once per instance...) self._runner = helpers.Runners(paths) def install_packages(self, pkglist): self.package_command('install', pkglist) def _write_network(self, settings): # TODO fix this... since this is the ubuntu format entries = translate_network(settings) LOG.debug("Translated ubuntu style network settings %s into %s", settings, entries) # Make the intermediate format as the rhel format... for (dev, info) in entries.iteritems(): net_fn = NETWORK_FN_TPL % (dev) net_ro_fn = self._paths.join(True, net_fn) (prev_exist, net_cfg) = self._read_conf(net_ro_fn) net_cfg['DEVICE'] = dev boot_proto = info.get('bootproto') if boot_proto: net_cfg['BOOTPROTO'] = boot_proto net_mask = info.get('netmask') if net_mask: net_cfg["NETMASK"] = net_mask addr = info.get('address') if addr: net_cfg["IPADDR"] = addr if info.get('auto'): net_cfg['ONBOOT'] = 'yes' else: net_cfg['ONBOOT'] = 'no' gtway = info.get('gateway') if gtway: net_cfg["GATEWAY"] = gtway bcast = info.get('broadcast') if bcast: net_cfg["BROADCAST"] = bcast mac_addr = info.get('hwaddress') if mac_addr: net_cfg["MACADDR"] = mac_addr lines = net_cfg.write() if not prev_exist: lines.insert(0, '# Created by cloud-init') w_contents = "\n".join(lines) net_rw_fn = self._paths.join(False, net_fn) util.write_file(net_rw_fn, w_contents, 0644) def set_hostname(self, hostname): out_fn = self._paths.join(False, '/etc/sysconfig/network') self._write_hostname(hostname, out_fn) if out_fn == '/etc/sysconfig/network': # Only do this if we are running in non-adjusted root mode LOG.debug("Setting hostname to %s", hostname) util.subp(['hostname', hostname]) def apply_locale(self, locale, out_fn=None): if not out_fn: out_fn = self._paths.join(False, '/etc/sysconfig/i18n') ro_fn = self._paths.join(True, '/etc/sysconfig/i18n') (_exists, contents) = self._read_conf(ro_fn) contents['LANG'] = locale w_contents = "\n".join(contents.write()) util.write_file(out_fn, w_contents, 0644) def _write_hostname(self, hostname, out_fn): (_exists, contents) = self._read_conf(out_fn) contents['HOSTNAME'] = hostname w_contents = "\n".join(contents.write()) util.write_file(out_fn, w_contents, 0644) def update_hostname(self, hostname, prev_file): hostname_prev = self._read_hostname(prev_file) read_fn = self._paths.join(True, "/etc/sysconfig/network") hostname_in_sys = self._read_hostname(read_fn) update_files = [] if not hostname_prev or hostname_prev != hostname: update_files.append(prev_file) if (not hostname_in_sys or (hostname_in_sys == hostname_prev and hostname_in_sys != hostname)): write_fn = self._paths.join(False, "/etc/sysconfig/network") update_files.append(write_fn) for fn in update_files: try: self._write_hostname(hostname, fn) except: util.logexc(LOG, "Failed to write hostname %s to %s", hostname, fn) if (hostname_in_sys and hostname_prev and hostname_in_sys != hostname_prev): LOG.debug(("%s differs from /etc/sysconfig/network." " Assuming user maintained hostname."), prev_file) if "/etc/sysconfig/network" in update_files: # Only do this if we are running in non-adjusted root mode LOG.debug("Setting hostname to %s", hostname) util.subp(['hostname', hostname]) def _read_hostname(self, filename, default=None): (_exists, contents) = self._read_conf(filename) if 'HOSTNAME' in contents: return contents['HOSTNAME'] else: return default def _read_conf(self, fn): exists = False if os.path.isfile(fn): contents = util.load_file(fn).splitlines() exists = True else: contents = [] return (exists, QuotingConfigObj(contents)) def set_timezone(self, tz): tz_file = os.path.join("/usr/share/zoneinfo", tz) if not os.path.isfile(tz_file): raise RuntimeError(("Invalid timezone %s," " no file found at %s") % (tz, tz_file)) # Adjust the sysconfig clock zone setting read_fn = self._paths.join(True, "/etc/sysconfig/clock") (_exists, contents) = self._read_conf(read_fn) contents['ZONE'] = tz tz_contents = "\n".join(contents.write()) write_fn = self._paths.join(False, "/etc/sysconfig/clock") util.write_file(write_fn, tz_contents) # This ensures that the correct tz will be used for the system util.copy(tz_file, self._paths.join(False, "/etc/localtime")) def package_command(self, command, args=None): cmd = ['yum'] # If enabled, then yum will be tolerant of errors on the command line # with regard to packages. # For example: if you request to install foo, bar and baz and baz is # installed; yum won't error out complaining that baz is already # installed. cmd.append("-t") # Determines whether or not yum prompts for confirmation # of critical actions. We don't want to prompt... cmd.append("-y") cmd.append(command) if args: cmd.extend(args) # Allow the output of this to flow outwards (ie not be captured) util.subp(cmd, capture=False) def update_package_sources(self): self._runner.run("update-sources", self.package_command, ["update"], freq=PER_INSTANCE) # This class helps adjust the configobj # writing to ensure that when writing a k/v # on a line, that they are properly quoted # and have no spaces between the '=' sign. # - This is mainly due to the fact that # the sysconfig scripts are often sourced # directly into bash/shell scripts so ensure # that it works for those types of use cases. class QuotingConfigObj(ConfigObj): def __init__(self, lines): ConfigObj.__init__(self, lines, interpolation=False, write_empty_values=True) def _quote_posix(self, text): if not text: return '' for (k, v) in D_QUOTE_CHARS.iteritems(): text = text.replace(k, v) return '"%s"' % (text) def _quote_special(self, text): if text.lower() in ['yes', 'no', 'true', 'false']: return text else: return self._quote_posix(text) def _write_line(self, indent_string, entry, this_entry, comment): # Ensure it is formatted fine for # how these sysconfig scripts are used val = self._decode_element(self._quote(this_entry)) # Single quoted strings should # always work. if not val.startswith("'"): # Perform any special quoting val = self._quote_special(val) key = self._decode_element(self._quote(entry, multiline=False)) cmnt = self._decode_element(comment) return '%s%s%s%s%s' % (indent_string, key, "=", val, cmnt) # This is a util function to translate a ubuntu /etc/network/interfaces 'blob' # to a rhel equiv. that can then be written to /etc/sysconfig/network-scripts/ # TODO remove when we have python-netcf active... def translate_network(settings): # Get the standard cmd, args from the ubuntu format entries = [] for line in settings.splitlines(): line = line.strip() if not line or line.startswith("#"): continue split_up = line.split(None, 1) if len(split_up) <= 1: continue entries.append(split_up) # Figure out where each iface section is ifaces = [] consume = {} for (cmd, args) in entries: if cmd == 'iface': if consume: ifaces.append(consume) consume = {} consume[cmd] = args else: consume[cmd] = args # Check if anything left over to consume absorb = False for (cmd, args) in consume.iteritems(): if cmd == 'iface': absorb = True if absorb: ifaces.append(consume) # Now translate real_ifaces = {} for info in ifaces: if 'iface' not in info: continue iface_details = info['iface'].split(None) dev_name = None if len(iface_details) >= 1: dev = iface_details[0].strip().lower() if dev: dev_name = dev if not dev_name: continue iface_info = {} if len(iface_details) >= 3: proto_type = iface_details[2].strip().lower() # Seems like this can be 'loopback' which we don't # really care about if proto_type in ['dhcp', 'static']: iface_info['bootproto'] = proto_type # These can just be copied over for k in ['netmask', 'address', 'gateway', 'broadcast']: if k in info: val = info[k].strip().lower() if val: iface_info[k] = val # Is any mac address spoofing going on?? if 'hwaddress' in info: hw_info = info['hwaddress'].lower().strip() hw_split = hw_info.split(None, 1) if len(hw_split) == 2 and hw_split[0].startswith('ether'): hw_addr = hw_split[1] if hw_addr: iface_info['hwaddress'] = hw_addr real_ifaces[dev_name] = iface_info # Check for those that should be started on boot via 'auto' for (cmd, args) in entries: if cmd == 'auto': # Seems like auto can be like 'auto eth0 eth0:1' so just get the # first part out as the device name args = args.split(None) if not args: continue dev_name = args[0].strip().lower() if dev_name in real_ifaces: real_ifaces[dev_name]['auto'] = True return real_ifaces