From 8900f9cba622eeaf3810003c5a6ff7522312277b Mon Sep 17 00:00:00 2001
From: Joshua Harlow <harlowja@yahoo-inc.com>
Date: Thu, 7 Jun 2012 12:42:38 -0700
Subject: 1. Adding some new helper files that split off file inclusion,
 templating, importing, constant usage. 1. Move all datasources to a new
 sources directory 1. Rename some files to be more consistent with python
 file/module naming.

---
 cloudinit/handlers/DataSourceCloudStack.py | 92 ++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 cloudinit/handlers/DataSourceCloudStack.py

(limited to 'cloudinit/handlers/DataSourceCloudStack.py')

diff --git a/cloudinit/handlers/DataSourceCloudStack.py b/cloudinit/handlers/DataSourceCloudStack.py
new file mode 100644
index 00000000..5afdf7b6
--- /dev/null
+++ b/cloudinit/handlers/DataSourceCloudStack.py
@@ -0,0 +1,92 @@
+# vi: ts=4 expandtab
+#
+#    Copyright (C) 2012 Canonical Ltd.
+#    Copyright (C) 2012 Cosmin Luta
+#
+#    Author: Cosmin Luta <q4break@gmail.com>
+#    Author: Scott Moser <scott.moser@canonical.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 cloudinit.DataSource as DataSource
+
+from cloudinit import seeddir as base_seeddir
+from cloudinit import log
+import cloudinit.util as util
+from socket import inet_ntoa
+import time
+import boto.utils as boto_utils
+from struct import pack
+
+
+class DataSourceCloudStack(DataSource.DataSource):
+    api_ver = 'latest'
+    seeddir = base_seeddir + '/cs'
+    metadata_address = None
+
+    def __init__(self, sys_cfg=None):
+        DataSource.DataSource.__init__(self, sys_cfg)
+        # Cloudstack has its metadata/userdata URLs located at
+        # http://<default-gateway-ip>/latest/
+        self.metadata_address = "http://%s/" % self.get_default_gateway()
+
+    def get_default_gateway(self):
+        """ Returns the default gateway ip address in the dotted format
+        """
+        with open("/proc/net/route", "r") as f:
+            for line in f.readlines():
+                items = line.split("\t")
+                if items[1] == "00000000":
+                    # found the default route, get the gateway
+                    gw = inet_ntoa(pack("<L", int(items[2], 16)))
+                    log.debug("found default route, gateway is %s" % gw)
+                    return gw
+
+    def __str__(self):
+        return "DataSourceCloudStack"
+
+    def get_data(self):
+        seedret = {}
+        if util.read_optional_seed(seedret, base=self.seeddir + "/"):
+            self.userdata_raw = seedret['user-data']
+            self.metadata = seedret['meta-data']
+            log.debug("using seeded cs data in %s" % self.seeddir)
+            return True
+
+        try:
+            start = time.time()
+            self.userdata_raw = boto_utils.get_instance_userdata(self.api_ver,
+                None, self.metadata_address)
+            self.metadata = boto_utils.get_instance_metadata(self.api_ver,
+                self.metadata_address)
+            log.debug("crawl of metadata service took %ds" %
+                (time.time() - start))
+            return True
+        except Exception as e:
+            log.exception(e)
+            return False
+
+    def get_instance_id(self):
+        return self.metadata['instance-id']
+
+    def get_availability_zone(self):
+        return self.metadata['availability-zone']
+
+datasources = [
+  (DataSourceCloudStack, (DataSource.DEP_FILESYSTEM, DataSource.DEP_NETWORK)),
+]
+
+
+# return a list of data sources that match this set of dependencies
+def get_datasource_list(depends):
+    return DataSource.list_from_depends(depends, datasources)
-- 
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