1 files changed, 41 insertions, 0 deletions
diff --git a/cloudinit/config/update_hostname.py b/cloudinit/config/update_hostname.py
new file mode 100644
index 00000000..58444fab
--- /dev/null
+++ b/cloudinit/config/update_hostname.py
@@ -0,0 +1,41 @@
+# vi: ts=4 expandtab
+#
+#    Copyright (C) 2011 Canonical Ltd.
+#    Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
+#
+#    Author: Scott Moser <scott.moser@canonical.com>
+#    Author: Juerg Haefliger <juerg.haefliger@hp.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 util
+from cloudinit.settings import PER_ALWAYS
+
+frequency = PER_ALWAYS
+
+
+def handle(name, cfg, cloud, log, _args):
+    if util.get_cfg_option_bool(cfg, "preserve_hostname", False):
+        log.debug(("Configuration option 'preserve_hostname' is set,"
+                    " not updating the hostname in transform %s"), name)
+        return
+
+    (hostname, _fqdn) = util.get_hostname_fqdn(cfg, cloud)
+    try:
+        prev_fn = os.path.join(cloud.get_cpath('data'), "previous-hostname")
+        cloud.distro.update_hostname(hostname, prev_fn)
+    except Exception:
+        util.logexc(log, "Failed to set the hostname to %s", hostname)
+        raise