import CloudStack data source [Cosmin Luta]

4 files changed, 91 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index dd884961..0d31c8c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -28,6 +28,7 @@
  - DataSourceNoCloud: support seed from external disk of ISO or vfat (LP: #857378)
  - DataSourceNoCloud: support inserting /etc/network/interfaces
  - DataSourceMaaS: add data source for Ubuntu Machines as a Service (MaaS) (LP: #942061)
+ - DataSourceCloudStack: add support for CloudStack datasource [Cosmin Luta]
  - add option 'apt_pipelining' to address issue with S3 mirrors 
    (LP: #948461) [Ben Howard]
 0.6.2:
diff --git a/cloudinit/DataSourceCloudStack.py b/cloudinit/DataSourceCloudStack.py
new file mode 100644
index 00000000..181b9419
--- /dev/null
+++ b/cloudinit/DataSourceCloudStack.py
@@ -0,0 +1,88 @@
+# 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)
diff --git a/cloudinit/__init__.py b/cloudinit/__init__.py
index 9f188766..37447a31 100644
--- a/cloudinit/__init__.py
+++ b/cloudinit/__init__.py
@@ -29,7 +29,7 @@ cfg_env_name = "CLOUD_CFG"
 
 cfg_builtin = """
 log_cfgs: []
-datasource_list: ["NoCloud", "ConfigDrive", "OVF", "MaaS", "Ec2" ]
+datasource_list: ["NoCloud", "ConfigDrive", "OVF", "MaaS", "Ec2", "CloudStack"]
 def_log_file: /var/log/cloud-init.log
 syslog_fix_perms: syslog:adm
 """
diff --git a/config/cloud.cfg b/config/cloud.cfg
index e9e3bb6c..983b0ba6 100644
--- a/config/cloud.cfg
+++ b/config/cloud.cfg
@@ -1,7 +1,7 @@
 user: ubuntu
 disable_root: 1
 preserve_hostname: False
-# datasource_list: ["NoCloud", "ConfigDrive", "OVF", "MaaS", "Ec2" ]
+# datasource_list: ["NoCloud", "ConfigDrive", "OVF", "MaaS", "Ec2", "CloudStack"]
 
 cloud_init_modules:
  - bootcmd