Do not crash on volume attachments without device

Sometimes OpenStack does not return any device in the attached volumes, this
change avoids a KeyError when not defined.

Change-Id: If96fa02a7d6fd93e31667b2481943c6294173f72
Closes-Bug: #1663491

ooi/api/compute.py

@@ -268,7 +268,8 @@ class Controller(ooi.api.base.Controller):
         for v in vols:
             st = storage.StorageResource(title="storage", id=v["volumeId"])
             comp.add_link(storage_link.StorageLink(comp, st,
-                                                   deviceid=v["device"]))
+                                                   deviceid=v.get("device",
+                                                                  None)))
 
         # network links
         addresses = s.get("addresses", {})

ooi/api/storage_link.py

@@ -40,7 +40,8 @@ class Controller(base.Controller):
                                                 id=attach["serverId"])
                     s = storage.StorageResource(title="Storage", id=v["id"])
                     l = storage_link.StorageLink(c, s,
-                                                 deviceid=attach["device"])
+                                                 deviceid=attach.get("device",
+                                                                     None))
                     occi_link_resources.append(l)
 
         return collection.Collection(resources=occi_link_resources)
@@ -61,7 +62,7 @@ class Controller(base.Controller):
         v = self._get_attachment_from_id(req, id)
         c = compute.ComputeResource(title="Compute", id=v["serverId"])
         s = storage.StorageResource(title="Storage", id=v["volumeId"])
-        return storage_link.StorageLink(c, s, deviceid=v["device"])
+        return storage_link.StorageLink(c, s, deviceid=v.get("device", None))
 
     def create(self, req, body):
         parser = req.get_parser()(req.headers, req.body)

ooi/tests/fakes.py

@@ -95,6 +95,12 @@ volumes = {
             "size": 5,
             "status": "in-use",
         },
+        {
+            "id": uuid.uuid4().hex,
+            "displayName": "volume-nodev",
+            "size": 6,
+            "status": "in-use",
+        },
     ],
 }
 
@@ -213,7 +219,8 @@ servers = {
             "image": {"id": images["bar"]["id"]},
             "status": "ACTIVE",
             "os-extended-volumes:volumes_attached": [
-                {"id": volumes[tenants["baz"]["id"]][0]["id"]}
+                {"id": volumes[tenants["baz"]["id"]][0]["id"]},
+                {"id": volumes[tenants["baz"]["id"]][1]["id"]}
             ],
             "addresses": {
                 "private": [
@@ -249,6 +256,15 @@ volumes[tenants["baz"]["id"]][0]["attachments"] = [{
     "id": volumes[tenants["baz"]["id"]][0]["id"],
 }]
 
+volumes[tenants["baz"]["id"]][1]["attachments"] = [{
+    "server_id": servers[tenants["baz"]["id"]][0]["id"],
+    "serverId": servers[tenants["baz"]["id"]][0]["id"],
+    "attachment_id": uuid.uuid4().hex,
+    "volumeId": volumes[tenants["baz"]["id"]][1]["id"],
+    "volume_id": volumes[tenants["baz"]["id"]][1]["id"],
+    "id": volumes[tenants["baz"]["id"]][0]["id"],
+}]
+
 
 def fake_query_results():
     cats = []

ooi/tests/unit/controllers/test_compute.py

@@ -186,8 +186,11 @@ class TestComputeController(base.TestController):
                 flavor = fakes.flavors[server["flavor"]["id"]]
                 image = fakes.images[server["image"]["id"]]
                 volumes = fakes.volumes.get(tenant["id"], [])
-                if volumes:
-                    volumes = volumes[0]["attachments"]
+                attachments = []
+                for v in volumes:
+                    for att in v["attachments"]:
+                        if att["server_id"] == server["id"]:
+                            attachments.append(att)
                 net_id = fakes.networks.get(tenant["id"], [])
                 if net_id:
                     net_id = net_id[0]['id']
@@ -195,7 +198,7 @@ class TestComputeController(base.TestController):
                 m_server.return_value = server
                 m_flavor.return_value = flavor
                 m_image.return_value = image
-                m_vol.return_value = volumes
+                m_vol.return_value = attachments
 
                 ret = self.controller.show(None, server["id"])
                 # FIXME(aloga): Should we test the resource?