Openstack Storage Manager added

implementation/storage/OpenstackStorageManager.py

+import Snapshot
+import SnapshotManager
+import openstack
+
+
+class OpenstackSnapshotManager(SnapshotManager.SnapshotManager):
+
+    def __init__(self, cloud) -> None:
+        super().__init__()
+
+        self.openstack = openstack.connect(cloud=cloud)
+
+    @staticmethod
+    def os_snapshot_to_rc_snapshot(os_snapshot):
+        return Snapshot.Snapshot(
+            os_snapshot.id,
+            os_snapshot.size
+        )
+
+    def create_from_volume(self, id):
+        os_snapshot = self.openstack.block_storage.create_snapshot(volume_id=id)
+
+        return self.os_snapshot_to_rc_snapshot(os_snapshot)
+
+    def get(self, id):
+        os_snapshot = self.openstack.block_storage.get_snapshot(id)
+
+        return self.os_snapshot_to_rc_snapshot(os_snapshot)
+
+    def list(self):
+        snapshots = []
+
+        for os_snapshot in self.openstack.block_storage.snapshots():
+            snapshots.append(self.os_snapshot_to_rc_snapshot(os_snapshot))
+
+        return snapshots
+
+    def delete(self, id):
+        print(self.openstack.block_storage.delete_snapshot(id))