select version for amzn-driver

bootstrapvz/providers/ec2/README.rst

@@ -124,6 +124,28 @@ Example:
       virtualization: hvm
       enhanced_networking: simple
 
+Amazon Drivers
+~~~~~~~~~~~~~~
+
+Define the version for the Amazon Elastic Network
+Adapter (ENA) driver.
+Read more about this on the `Amazon Drivers git repo`__.
+
+__ https://github.com/amzn/amzn-drivers
+
+-  ``amzn-driver-version``: Default: master
+   Valid values: ``master``, ``#.#.#``
+   ``optional``
+
+Example:
+
+.. code-block:: yaml
+
+    ---
+    provider:
+      name: ec2
+      amzn-driver-version: 1.5.0
+
 Image
 ~~~~~
 

bootstrapvz/providers/ec2/manifest-schema.yml

@@ -24,6 +24,9 @@ properties:
         enum:
           - none
           - simple
+      amzn-driver-version:
+        type: string
+        pattern: "^([0-9]+\\.?){3}$"
     required: [description, virtualization]
   system:
     type: object

bootstrapvz/providers/ec2/tasks/network.py

@@ -135,13 +135,25 @@ class InstallENANetworking(Task):
 
     @classmethod
     def run(cls, info):
-        version = '1.0.0'
-        drivers_url = 'https://github.com/amzn/amzn-drivers'
+        version = info.manifest.provider.get('amzn-driver-version', 'master')
+
+        if version != 'master':
+            version = 'ena_linux_' + version
+
+        drivers_url = 'https://codeload.github.com/amzn/amzn-drivers/tar.gz/' + version
         module_path = os.path.join(info.root, 'usr', 'src',
                                    'amzn-drivers-%s' % (version))
+        archive = os.path.join(info.root, 'tmp', 'amzn-drivers-%s.tar.gz' % (version))
+
+        import urllib
+        urllib.urlretrieve(drivers_url, archive)
 
         from bootstrapvz.common.tools import log_check_call
-        log_check_call(['git', 'clone', drivers_url, module_path])
+        log_check_call(['tar', '--ungzip',
+                               '--extract',
+                               '--file', archive,
+                               '--directory', os.path.join(info.root, 'usr',
+                                                           'src')])
 
         with open(os.path.join(module_path, 'dkms.conf'), 'w') as dkms_conf:
             dkms_conf.write("""PACKAGE_NAME="ena"