1 files changed, 26 insertions, 0 deletions
diff --git a/qa/tasks/util/__init__.py b/qa/tasks/util/__init__.py
new file mode 100644
index 00000000..5b8575ed
--- /dev/null
+++ b/qa/tasks/util/__init__.py
@@ -0,0 +1,26 @@
+from teuthology import misc
+
+def get_remote(ctx, cluster, service_type, service_id):
+    """
+    Get the Remote for the host where a particular role runs.
+
+    :param cluster: name of the cluster the service is part of
+    :param service_type: e.g. 'mds', 'osd', 'client'
+    :param service_id: The third part of a role, e.g. '0' for
+                       the role 'ceph.client.0'
+    :return: a Remote instance for the host where the
+             requested role is placed
+    """
+    def _is_instance(role):
+        role_tuple = misc.split_role(role)
+        return role_tuple == (cluster, service_type, str(service_id))
+    try:
+        (remote,) = ctx.cluster.only(_is_instance).remotes.keys()
+    except ValueError:
+        raise KeyError("Service {0}.{1}.{2} not found".format(cluster,
+                                                              service_type,
+                                                              service_id))
+    return remote
+
+def get_remote_for_role(ctx, role):
+    return get_remote(ctx, *misc.split_role(role))