Added delete_on_termination option for volume attachment

cloud/amazon/ec2_vol.py

@@ -67,6 +67,12 @@ options:
       - device id to override device mapping. Assumes /dev/sdf for Linux/UNIX and /dev/xvdf for Windows.
     required: false
     default: null
+  delete_on_termination:
+    description:
+      - When set to "yes", the volume will be deleted upon instance termination.
+    required: false
+    default: "no"
+    choices: ["yes", "no"]
   zone:
     description:
       - zone in which to create the volume, if unset uses the zone the instance is in (if set)
@@ -173,6 +179,56 @@ EXAMPLES = '''
     volume_size: 50
     volume_type: gp2
     device_name: /dev/xvdf
+
+# Attach an existing volume to instance. The volume will be deleted upon instance termination.
+- ec2_vol:
+    instance: XXXXXX
+    id: XXXXXX
+    device_name: /dev/sdf
+    delete_on_termination: yes
+'''
+
+RETURN = '''
+device:
+    description: device name of attached volume
+    returned: when success
+    type: string
+    sample: "/def/sdf"
+volume_id:
+    description: the id of volume
+    returned: when success
+    type: string
+    sample: "vol-35b333d9"
+volume_type:
+    description: the volume type
+    returned: when success
+    type: string
+    sample: "standard"
+volume:
+    description: a dictionary containing detailed attributes of the volume
+    returned: when success
+    type: string
+    sample: {
+	"attachment_set": {
+    	    "attach_time": "2015-10-23T00:22:29.000Z",
+    	    "deleteOnTermination": "false",
+    	    "device": "/dev/sdf",
+    	    "instance_id": "i-8356263c",
+            "status": "attached"
+        },
+        "create_time": "2015-10-21T14:36:08.870Z",
+        "encrypted": false,
+        "id": "vol-35b333d9",
+        "iops": null,
+        "size": 1,
+        "snapshot_id": "",
+        "status": "in-use",
+        "tags": {
+            "env": "dev"
+        },
+        "type": "standard",
+        "zone": "us-east-1b"
+    }
 '''
 
 import time
@@ -182,6 +238,7 @@ from distutils.version import LooseVersion
 try:
     import boto.ec2
     from boto.exception import BotoServerError
+    from boto.ec2.blockdevicemapping import BlockDeviceType, BlockDeviceMapping
     HAS_BOTO = True
 except ImportError:
     HAS_BOTO = False
@@ -222,6 +279,7 @@ def get_volume(module, ec2):
         module.fail_json(msg="Found more than one volume in zone (if specified) with name: %s" % name)
     return vols[0]
 
+
 def get_volumes(module, ec2):
 
     instance = module.params.get('instance')
@@ -235,6 +293,7 @@ def get_volumes(module, ec2):
         module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
     return vols
 
+
 def delete_volume(module, ec2):
     volume_id = module.params['id']
     try:
@@ -245,6 +304,7 @@ def delete_volume(module, ec2):
             module.exit_json(changed=False)
         module.fail_json(msg=ec2_error.message)
 
+
 def boto_supports_volume_encryption():
     """
     Check if Boto library supports encryption of EBS volumes (added in 2.29.0)
@@ -292,6 +352,7 @@ def create_volume(module, ec2, zone):
 def attach_volume(module, ec2, volume, instance):
 
     device_name = module.params.get('device_name')
+    delete_on_termination = module.params.get('delete_on_termination')
     changed = False
 
     # If device_name isn't set, make a choice based on best practices here:
@@ -315,6 +376,9 @@ def attach_volume(module, ec2, volume, instance):
         if adata.instance_id != instance.id:
             module.fail_json(msg = "Volume %s is already attached to another instance: %s"
                              % (volume.id, adata.instance_id))
+        else:
+            # Volume is already attached to right instance
+            changed = modify_dot_attribute(module, ec2, instance, device_name)
     else:
         try:
             volume.attach(instance.id, device_name)
@@ -325,8 +389,41 @@ def attach_volume(module, ec2, volume, instance):
         except boto.exception.BotoServerError, e:
             module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
 
+        modify_dot_attribute(module, ec2, instance, device_name)
+
     return volume, changed
 
+
+def modify_dot_attribute(module, ec2, instance, device_name):
+    """ Modify delete_on_termination attribute """
+
+    delete_on_termination = module.params.get('delete_on_termination')
+    changed = False
+
+    try:
+        instance.update()
+        dot = instance.block_device_mapping[device_name].delete_on_termination
+    except boto.exception.BotoServerError, e:
+        module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
+  
+    if delete_on_termination != dot:
+        try:
+            bdt = BlockDeviceType(delete_on_termination=delete_on_termination)
+            bdm = BlockDeviceMapping()
+            bdm[device_name] = bdt
+
+            ec2.modify_instance_attribute(instance_id=instance.id, attribute='blockDeviceMapping', value=bdm)
+
+	    while instance.block_device_mapping[device_name].delete_on_termination != delete_on_termination:
+                time.sleep(3)
+                instance.update()
+            changed = True
+        except boto.exception.BotoServerError, e:
+            module.fail_json(msg = "%s: %s" % (e.error_code, e.error_message))
+
+    return changed
+
+
 def detach_volume(module, ec2, volume):
 
     changed = False
@@ -341,6 +438,7 @@ def detach_volume(module, ec2, volume):
 
     return volume, changed
 
+
 def get_volume_info(volume, state):
 
     # If we're just listing volumes then do nothing, else get the latest update for the volume
@@ -352,6 +450,7 @@ def get_volume_info(volume, state):
 
     volume_info = {
                     'create_time': volume.create_time,
+                    'encrypted': volume.encrypted,
                     'id': volume.id,
                     'iops': volume.iops,
                     'size': volume.size,
@@ -367,9 +466,12 @@ def get_volume_info(volume, state):
                     },
                     'tags': volume.tags
                 }
+    if hasattr(attachment, 'deleteOnTermination'):
+        volume_info['attachment_set']['deleteOnTermination'] = attachment.deleteOnTermination
 
     return volume_info
 
+
 def main():
     argument_spec = ec2_argument_spec()
     argument_spec.update(dict(
@@ -381,6 +483,7 @@ def main():
             iops = dict(),
             encrypted = dict(type='bool', default=False),
             device_name = dict(),
+            delete_on_termination = dict(type='bool', default=False),
             zone = dict(aliases=['availability_zone', 'aws_zone', 'ec2_zone']),
             snapshot = dict(),
             state = dict(choices=['absent', 'present', 'list'], default='present')