Rebased with HEAD and resolved conflicts.

1 files changed, 57 insertions, 129 deletions

diff --git a/cloudinit/distros/rhel.py b/cloudinit/distros/rhel.py
index e4c27216..7df01c62 100644
--- a/cloudinit/distros/rhel.py
+++ b/cloudinit/distros/rhel.py
@@ -23,39 +23,18 @@
 import os
 
 from cloudinit import distros
+
+from cloudinit.distros.parsers.resolv_conf import ResolvConf
+from cloudinit.distros.parsers.sys_conf import SysConf
+
 from cloudinit import helpers
 from cloudinit import log as logging
 from cloudinit import util
-from cloudinit import version
 
 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 = {
-    "\"": "\\\"",
-    "(": "\\(",
-    ")": "\\)",
-    "$": '\$',
-    '`': '\`',
-}
-
 
 def _make_sysconfig_bool(val):
     if val:
@@ -64,12 +43,16 @@ def _make_sysconfig_bool(val):
         return 'no'
 
 
-def _make_header():
-    ci_ver = version.version_string()
-    return '# Created by cloud-init v. %s' % (ci_ver)
-
-
 class Distro(distros.Distro):
+    # See: http://tiny.cc/6r99fw
+    clock_conf_fn = "/etc/sysconfig/clock"
+    locale_conf_fn = '/etc/sysconfig/i18n'
+    network_conf_fn = "/etc/sysconfig/network"
+    hostname_conf_fn = "/etc/sysconfig/network" 
+    network_script_tpl = '/etc/sysconfig/network-scripts/ifcfg-%s'
+    resolve_conf_fn = "/etc/resolv.conf"
+    tz_local_fn = "/etc/localtime"
+    tz_zone_dir = "/usr/share/zoneinfo"
 
     def __init__(self, name, cfg, paths):
         distros.Distro.__init__(self, name, cfg, paths)
@@ -81,16 +64,29 @@ class Distro(distros.Distro):
     def install_packages(self, pkglist):
         self.package_command('install', pkglist)
 
-    def _write_resolve(self, dns_servers, search_servers):
-        contents = []
+    def _adjust_resolve(self, dns_servers, search_servers):
+        r_conf = ResolvConf(util.load_file(self.resolve_conf_fn))
+        try:
+            r_conf.parse()
+        except IOError:
+            util.logexc(LOG, 
+                        "Failed at parsing %s reverting to an empty instance",
+                        self.resolve_conf_fn)
+            r_conf = ResolvConf('')
+            r_conf.parse()
         if dns_servers:
             for s in dns_servers:
-                contents.append("nameserver %s" % (s))
+                try:
+                    r_conf.add_nameserver(s)
+                except ValueError:
+                    util.logexc(LOG, "Failed at adding nameserver %s", s)
         if search_servers:
-            contents.append("search %s" % (" ".join(search_servers)))
-        if contents:
-            contents.insert(0, _make_header())
-            util.write_file("/etc/resolv.conf", "\n".join(contents), 0644)
+            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(self.resolve_conf_fn, str(r_conf), 0644)
 
     def _write_network(self, settings):
         # TODO(harlowja) fix this... since this is the ubuntu format
@@ -102,7 +98,7 @@ class Distro(distros.Distro):
         searchservers = []
         dev_names = entries.keys()
         for (dev, info) in entries.iteritems():
-            net_fn = NETWORK_FN_TPL % (dev)
+            net_fn = self.network_script_tpl % (dev)
             net_cfg = {
                 'DEVICE': dev,
                 'NETMASK': info.get('netmask'),
@@ -119,12 +115,12 @@ class Distro(distros.Distro):
             if 'dns-search' in info:
                 searchservers.extend(info['dns-search'])
         if nameservers or searchservers:
-            self._write_resolve(nameservers, searchservers)
+            self._adjust_resolve(nameservers, searchservers)
         if dev_names:
             net_cfg = {
                 'NETWORKING': _make_sysconfig_bool(True),
             }
-            self._update_sysconfig_file("/etc/sysconfig/network", net_cfg)
+            self._update_sysconfig_file(self.network_conf_fn, net_cfg)
         return dev_names
 
     def _update_sysconfig_file(self, fn, adjustments, allow_empty=False):
@@ -141,24 +137,16 @@ class Distro(distros.Distro):
             contents[k] = v
             updated_am += 1
         if updated_am:
-            lines = contents.write()
+            lines = [
+                str(contents),
+            ]
             if not exists:
-                lines.insert(0, _make_header())
+                lines.insert(0, util.make_header())
             util.write_file(fn, "\n".join(lines), 0644)
 
-    def set_hostname(self, hostname, fqdn=None):
-        # See: http://bit.ly/TwitgL
-        # Should be fqdn if we can use it
-        sysconfig_hostname = fqdn
-        if not sysconfig_hostname:
-            sysconfig_hostname = hostname
-        self._write_hostname(sysconfig_hostname, '/etc/sysconfig/network')
-        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 = '/etc/sysconfig/i18n'
+            out_fn = self.locale_conf_fn
         locale_cfg = {
             'LANG': locale,
         }
@@ -170,34 +158,16 @@ class Distro(distros.Distro):
         }
         self._update_sysconfig_file(out_fn, host_cfg)
 
-    def update_hostname(self, hostname, fqdn, prev_file):
+    def _select_hostname(self, hostname, fqdn):
         # See: http://bit.ly/TwitgL
         # Should be fqdn if we can use it
-        sysconfig_hostname = fqdn
-        if not sysconfig_hostname:
-            sysconfig_hostname = hostname
-        hostname_prev = self._read_hostname(prev_file)
-        hostname_in_sys = self._read_hostname("/etc/sysconfig/network")
-        update_files = []
-        if not hostname_prev or hostname_prev != sysconfig_hostname:
-            update_files.append(prev_file)
-        if (not hostname_in_sys or
-            (hostname_in_sys == hostname_prev
-             and hostname_in_sys != sysconfig_hostname)):
-            update_files.append("/etc/sysconfig/network")
-        for fn in update_files:
-            try:
-                self._write_hostname(sysconfig_hostname, fn)
-            except:
-                util.logexc(LOG, "Failed to write hostname %s to %s",
-                            sysconfig_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:
-            LOG.debug("Setting hostname to %s", hostname)
-            util.subp(['hostname', hostname])
+        if fqdn:
+            return fqdn
+        return hostname
+
+    def _read_system_hostname(self):
+        return (self.network_conf_fn,
+                self._read_hostname(self.network_conf_fn))
 
     def _read_hostname(self, filename, default=None):
         (_exists, contents) = self._read_conf(filename)
@@ -213,7 +183,8 @@ class Distro(distros.Distro):
             exists = True
         else:
             contents = []
-        return (exists, QuotingConfigObj(contents))
+        return (exists,
+                SysConf(contents))
 
     def _bring_up_interfaces(self, device_names):
         if device_names and 'all' in device_names:
@@ -222,17 +193,19 @@ class Distro(distros.Distro):
         return distros.Distro._bring_up_interfaces(self, device_names)
 
     def set_timezone(self, tz):
-        tz_file = os.path.join("/usr/share/zoneinfo", tz)
+        # TODO(harlowja): move this code into
+        # the parent distro...
+        tz_file = os.path.join(self.tz_zone_dir, str(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
         clock_cfg = {
-            'ZONE': tz,
+            'ZONE': str(tz),
         }
-        self._update_sysconfig_file("/etc/sysconfig/clock", clock_cfg)
+        self._update_sysconfig_file(self.clock_conf_fn, clock_cfg)
         # This ensures that the correct tz will be used for the system
-        util.copy(tz_file, "/etc/localtime")
+        util.copy(tz_file, self.tz_local_fn)
 
     def package_command(self, command, args=None):
         cmd = ['yum']
@@ -256,51 +229,6 @@ class Distro(distros.Distro):
                          ["makecache"], 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(harlowja) remove when we have python-netcf active...