counter tasks for CreateMountDir and MountVolume

providers/ec2/__init__.py

@@ -25,8 +25,13 @@ def tasks(tasklist, manifest):
 
 def rollback_tasks(tasklist, tasks_completed, manifest):
 	completed = [type(task) for task in tasks_completed]
+
+	def counter_task(task, counter):
+		if task in completed and counter not in completed:
+			tasklist.add(counter())
+
 	if manifest.volume['backing'].lower() == 'ebs':
-		if ebs.CreateVolume in completed and ebs.DeleteVolume not in completed:
+		counter_task(ebs.CreateVolume, ebs.DeleteVolume)
-			tasklist.add(ebs.DeleteVolume())
+		counter_task(ebs.AttachVolume, ebs.DetachVolume)
-		if ebs.AttachVolume in completed and ebs.DetachVolume not in completed:
+	counter_task(filesystem.CreateMountDir, filesystem.DeleteMountDir)
-			tasklist.add(ebs.DetachVolume())
+	counter_task(filesystem.MountVolume, filesystem.UnmountVolume)

providers/ec2/tasks/ebs.py

@@ -2,6 +2,7 @@ from base import Task
 from common import phases
 from common.exceptions import TaskError
 from connection import Connect
+from filesystem import UnmountVolume
 import time
 
 
@@ -57,7 +58,7 @@ class AttachVolume(Task):
 
 class DetachVolume(Task):
 	phase = phases.volume_unmounting
-	after = []
+	after = [UnmountVolume]
 
 	description = 'Detaching the EBS volume'
 

providers/ec2/tasks/filesystem.py

@@ -51,7 +51,7 @@ class CreateMountDir(Task):
 
 
 class MountVolume(Task):
-	description = 'Creating mountpoint for the bootstrap volume'
+	description = 'Mounting the bootstrap volume'
 	phase = phases.volume_mounting
 	after = [CreateMountDir]
 
@@ -67,3 +67,25 @@ class MountVolume(Task):
 		dev_path = info.bootstrap_device['path']
 		with open(devnull, 'w') as dev_null:
 			subprocess.check_call(['mount', dev_path, info.root], stdout=dev_null, stderr=dev_null)
+
+
+class UnmountVolume(Task):
+	description = 'Unmounting the bootstrap volume'
+	phase = phases.volume_unmounting
+
+	def run(self, info):
+		import subprocess
+		from os import devnull
+		with open(devnull, 'w') as dev_null:
+			subprocess.check_call(['umount', info.root], stdout=dev_null, stderr=dev_null)
+
+
+class DeleteMountDir(Task):
+	description = 'Deleting mountpoint for the bootstrap volume'
+	phase = phases.volume_unmounting
+	after = [UnmountVolume]
+
+	def run(self, info):
+		import os
+		os.rmdir(info.root)
+		del info.root