Add Digital Ocean Datasource.

This adds a DataSource for DigitalOcean's metadata service. The service is
documented at https://developers.digitalocean.com/metadata/ .

1 files changed, 104 insertions, 0 deletions

diff --git a/cloudinit/sources/DataSourceDigitalOcean.py b/cloudinit/sources/DataSourceDigitalOcean.py
new file mode 100644
index 00000000..069bdb41
--- /dev/null
+++ b/cloudinit/sources/DataSourceDigitalOcean.py
@@ -0,0 +1,104 @@
+# vi: ts=4 expandtab
+#
+#    Author: Neal Shrader <neal@digitalocean.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/>.
+
+from cloudinit import log as logging
+from cloudinit import util
+from cloudinit import sources
+from cloudinit import ec2_utils
+from types import StringType
+import functools
+
+
+LOG = logging.getLogger(__name__)
+
+BUILTIN_DS_CONFIG = {
+    'metadata_url': 'http://169.254.169.254/metadata/v1/',
+    'mirrors_url': 'http://mirrors.digitalocean.com/'
+}
+MD_RETRIES = 0
+MD_TIMEOUT = 1
+
+class DataSourceDigitalOcean(sources.DataSource):
+    def __init__(self, sys_cfg, distro, paths):
+        sources.DataSource.__init__(self, sys_cfg, distro, paths)
+        self.metadata = dict()
+        self.ds_cfg = util.mergemanydict([
+            util.get_cfg_by_path(sys_cfg, ["datasource", "DigitalOcean"], {}),
+            BUILTIN_DS_CONFIG])
+        self.metadata_address = self.ds_cfg['metadata_url']
+
+        if self.ds_cfg.get('retries'):
+            self.retries = self.ds_cfg['retries']
+        else:
+            self.retries = MD_RETRIES
+
+        if self.ds_cfg.get('timeout'):
+            self.timeout = self.ds_cfg['timeout']
+        else:
+            self.timeout = MD_TIMEOUT
+
+    def get_data(self):
+        caller = functools.partial(util.read_file_or_url, timeout=self.timeout, 
+                                   retries=self.retries)
+        md = ec2_utils.MetadataMaterializer(str(caller(self.metadata_address)),
+                                            base_url=self.metadata_address, 
+                                            caller=caller)
+
+        self.metadata = md.materialize()
+
+        if self.metadata.get('id'):
+            return True
+        else:
+            return False
+
+    def get_userdata_raw(self):
+        return "\n".join(self.metadata['user-data'])
+
+    def get_vendordata_raw(self):
+        return "\n".join(self.metadata['vendor-data'])
+
+    def get_public_ssh_keys(self):
+        if type(self.metadata['public-keys']) is StringType:
+           return [self.metadata['public-keys']]
+        else:
+           return self.metadata['public-keys']
+
+    @property
+    def availability_zone(self):
+        return self.metadata['region']
+
+    def get_instance_id(self):
+        return self.metadata['id']
+
+    def get_hostname(self, fqdn=False):
+        return self.metadata['hostname']
+
+    def get_package_mirror_info(self):
+        return self.ds_cfg['mirrors_url']
+
+    @property
+    def launch_index(self):
+        return None
+
+# Used to match classes to dependencies
+datasources = [
+  (DataSourceDigitalOcean, (sources.DEP_FILESYSTEM, sources.DEP_NETWORK)),
+  ]
+
+
+# Return a list of data sources that match this set of dependencies
+def get_datasource_list(depends):
+    return sources.list_from_depends(depends, datasources)