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Diffstat (limited to 'cloudinit/distros/rhel_util.py')
| -rw-r--r-- | cloudinit/distros/rhel_util.py | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/cloudinit/distros/rhel_util.py b/cloudinit/distros/rhel_util.py new file mode 100644 index 00000000..1aba58b8 --- /dev/null +++ b/cloudinit/distros/rhel_util.py @@ -0,0 +1,177 @@ +# vi: ts=4 expandtab +# +# Copyright (C) 2012 Canonical Ltd. +# Copyright (C) 2012, 2013 Hewlett-Packard Development Company, L.P. +# Copyright (C) 2012 Yahoo! Inc. +# +# Author: Scott Moser <scott.moser@canonical.com> +# Author: Juerg Haefliger <juerg.haefliger@hp.com> +# Author: Joshua Harlow <harlowja@yahoo-inc.com> +# +# 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 <http://www.gnu.org/licenses/>. +# + +from cloudinit.distros.parsers.resolv_conf import ResolvConf +from cloudinit.distros.parsers.sys_conf import SysConf + +from cloudinit import log as logging +from cloudinit import util + +LOG = logging.getLogger(__name__) + + +# This is a util function to translate Debian based distro interface blobs as +# given in /etc/network/interfaces to an equivalent format for distributions +# that use ifcfg-* style (Red Hat and SUSE). +# TODO(harlowja) 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 + # Name server info provided?? + if 'dns-nameservers' in info: + iface_info['dns-nameservers'] = info['dns-nameservers'].split() + # Name server search info provided?? + if 'dns-search' in info: + iface_info['dns-search'] = info['dns-search'].split() + # 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 + + +# Helper function to update a RHEL/SUSE /etc/sysconfig/* file +def update_sysconfig_file(fn, adjustments, allow_empty=False): + if not adjustments: + return + (exists, contents) = read_sysconfig_file(fn) + updated_am = 0 + for (k, v) in adjustments.items(): + if v is None: + continue + v = str(v) + if len(v) == 0 and not allow_empty: + continue + contents[k] = v + updated_am += 1 + if updated_am: + lines = [ + str(contents), + ] + if not exists: + lines.insert(0, util.make_header()) + util.write_file(fn, "\n".join(lines) + "\n", 0644) + + +# Helper function to read a RHEL/SUSE /etc/sysconfig/* file +def read_sysconfig_file(fn): + exists = False + try: + contents = util.load_file(fn).splitlines() + exists = True + except IOError: + contents = [] + return (exists, SysConf(contents)) + + +# Helper function to update RHEL/SUSE /etc/resolv.conf +def update_resolve_conf_file(fn, dns_servers, search_servers): + try: + r_conf = ResolvConf(util.load_file(fn)) + r_conf.parse() + except IOError: + util.logexc(LOG, "Failed at parsing %s reverting to an empty " + "instance", fn) + r_conf = ResolvConf('') + r_conf.parse() + if dns_servers: + for s in dns_servers: + try: + r_conf.add_nameserver(s) + except ValueError: + util.logexc(LOG, "Failed at adding nameserver %s", s) + if search_servers: + for s in search_servers: + try: + r_conf.add_search_domain(s) + except ValueError: + util.logexc(LOG, "Failed at adding search domain %s", s) + util.write_file(fn, str(r_conf), 0644) |