1 files changed, 50 insertions, 0 deletions
diff --git a/cloudinit/dhclient_hook.py b/cloudinit/dhclient_hook.py
new file mode 100644
index 00000000..9dcbe39c
--- /dev/null
+++ b/cloudinit/dhclient_hook.py
@@ -0,0 +1,50 @@
+#!/usr/bin/python
+# vi: ts=4 expandtab
+
+import os
+
+from cloudinit.atomic_helper import atomic_write_json
+from cloudinit import log as logging
+from cloudinit import stages
+
+LOG = logging.getLogger(__name__)
+
+
+class LogDhclient(object):
+
+    def __init__(self, cli_args):
+        self.hooks_dir = self._get_hooks_dir()
+        self.net_interface = cli_args.net_interface
+        self.net_action = cli_args.net_action
+        self.hook_file = os.path.join(self.hooks_dir,
+                                      self.net_interface + ".json")
+
+    @staticmethod
+    def _get_hooks_dir():
+        i = stages.Init()
+        return os.path.join(i.paths.get_runpath(), 'dhclient.hooks')
+
+    def check_hooks_dir(self):
+        if not os.path.exists(self.hooks_dir):
+            os.makedirs(self.hooks_dir)
+        else:
+            # If the action is down and the json file exists, we need to
+            # delete the file
+            if self.net_action is 'down' and os.path.exists(self.hook_file):
+                os.remove(self.hook_file)
+
+    @staticmethod
+    def get_vals(info):
+        new_info = {}
+        for k, v in info.items():
+            if k.startswith("DHCP4_") or k.startswith("new_"):
+                key = (k.replace('DHCP4_', '').replace('new_', '')).lower()
+                new_info[key] = v
+        return new_info
+
+    def record(self):
+        envs = os.environ
+        if self.hook_file is None:
+            return
+        atomic_write_json(self.hook_file, self.get_vals(envs))
+        LOG.debug("Wrote dhclient options in %s", self.hook_file)