diff --git a/qa/clusters/fixed-3.yaml b/qa/clusters/fixed-3.yaml
index 455de4f9831..8e622d2db94 100644
--- a/qa/clusters/fixed-3.yaml
+++ b/qa/clusters/fixed-3.yaml
@@ -2,3 +2,7 @@ roles:
 - [mon.a, mon.c, osd.0, osd.1, osd.2]
 - [mon.b, osd.3, osd.4, osd.5]
 - [client.0]
+openstack:
+- volumes: # attached to each instance
+    count: 3
+    size: 10 # GB
diff --git a/qa/suites/krbd/singleton/tasks/rbd_xfstests.yaml b/qa/suites/krbd/singleton/tasks/rbd_xfstests.yaml
index 47a8199c190..237a4947f2a 100644
--- a/qa/suites/krbd/singleton/tasks/rbd_xfstests.yaml
+++ b/qa/suites/krbd/singleton/tasks/rbd_xfstests.yaml
@@ -3,6 +3,10 @@ roles:
 - [mon.b, mds.a, osd.3, osd.4, osd.5]
 - [client.0]
 - [client.1]
+openstack:
+- volumes: # attached to each instance
+    count: 3
+    size: 10 # GB
 tasks:
 - install:
 - ceph:
diff --git a/qa/suites/krbd/unmap/clusters/separate-client.yaml b/qa/suites/krbd/unmap/clusters/separate-client.yaml
index d4bd8f71ff9..a2184eefc5d 100644
--- a/qa/suites/krbd/unmap/clusters/separate-client.yaml
+++ b/qa/suites/krbd/unmap/clusters/separate-client.yaml
@@ -10,3 +10,7 @@ overrides:
 roles:
 - [mon.a, osd.0, osd.1, osd.2]
 - [client.0]
+openstack:
+- volumes: # attached to each instance
+    count: 3
+    size: 10 # GB