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# 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 <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/>.
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__)
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._update_package_sources()
self.package_command('install', pkglist)
def _write_network(self, settings):
util.write_file("/etc/network/interfaces", settings)
def set_hostname(self, hostname):
self._write_hostname(hostname, "/etc/hostname")
LOG.debug("Setting hostname to %s", hostname)
util.subp(['hostname', hostname])
def _write_hostname(self, hostname, out_fn):
lines = []
lines.append("# Created by cloud-init")
lines.append(str(hostname))
contents = "\n".join(lines)
util.write_file(out_fn, contents, 0644)
def update_hostname(self, hostname, prev_file):
hostname_prev = self._read_hostname(prev_file)
hostname_in_etc = self._read_hostname("/etc/hostname")
update_files = []
if not hostname_prev or hostname_prev != hostname:
update_files.append(prev_file)
if (not hostname_in_etc or
(hostname_in_etc == hostname_prev and hostname_in_etc != hostname)):
update_files.append("/etc/hostname")
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_etc and hostname_prev and
hostname_in_etc != hostname_prev):
LOG.debug(("%s differs from /etc/hostname."
" Assuming user maintained hostname."), prev_file)
if "/etc/hostname" in update_files:
LOG.debug("Setting hostname to %s", hostname)
util.subp(['hostname', hostname])
def _read_hostname(self, filename, default=None):
contents = util.load_file(filename, quiet=True)
for line in contents.splitlines():
c_pos = line.find("#")
# Handle inline comments
if c_pos != -1:
line = line[0:c_pos]
line_c = line.strip()
if line_c:
return line_c
return default
def _get_localhost_ip(self):
# Note: http://www.leonardoborda.com/blog/127-0-1-1-ubuntu-debian/
return "127.0.1.1"
def set_timezone(self, tz):
tz_file = os.path.join("/usr/share/zoneinfo", tz)
if not os.path.isfile(tz_file):
raise Exception(("Invalid timezone %s,"
" no file found at %s") % (tz, tz_file))
tz_contents = "%s\n" % tz
util.write_file("/etc/timezone", tz_contents)
util.copy(tz_file, "/etc/localtime")
def package_command(self, command, args=None):
e = os.environ.copy()
# See: http://tiny.cc/kg91fw
# Or: http://tiny.cc/mh91fw
e['DEBIAN_FRONTEND'] = 'noninteractive'
cmd = ['apt-get', '--option', 'Dpkg::Options::=--force-confold',
'--assume-yes', command]
if args:
cmd.extend(args)
# Allow the output of this to flow outwards (ie not be captured)
util.subp(cmd, env=e, capture=False)
def _update_package_sources(self):
self._runner.run("update-sources", self.package_command,
["update"], freq=PER_INSTANCE)
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