+The same error causes which were mentioned above for Tempest test cases, may also
+lead to errors in Rally as well.
+
+It is possible to run only one Rally scenario, instead of the whole suite.
+To do that, call the alternative python script as follows::
+
+ python $repos_dir/functest/testcases/OpenStack/rally/run_rally-cert.py -h
+ usage: run_rally-cert.py [-h] [-d] [-r] [-s] [-v] [-n] test_name
+
+ positional arguments:
+ test_name Module name to be tested. Possible values are : [
+ authenticate | glance | cinder | heat | keystone | neutron |
+ nova | quotas | requests | vm | all ] The 'all' value
+ performs all possible test scenarios
+
+ optional arguments:
+ -h, --help show this help message and exit
+ -d, --debug Debug mode
+ -r, --report Create json result file
+ -s, --smoke Smoke test mode
+ -v, --verbose Print verbose info about the progress
+ -n, --noclean Don't clean the created resources for this test.
+
+For example, to run the Glance scenario with debug information::
+
+ python $repos_dir/functest/testcases/OpenStack/rally/run_rally-cert.py -d glance
+
+Possible scenarios are:
+ * authenticate
+ * glance
+ * cinder
+ * heat
+ * keystone
+ * neutron
+ * nova
+ * quotas
+ * requests
+ * vm
+
+To know more about what those scenarios are doing, they are defined in directory:
+*$repos_dir/functest/testcases/OpenStack/rally/scenario*
+For more info about Rally scenario definition please refer to the Rally official
+documentation. `[3]`_
+
+If the flag *all* is specified, it will run all the scenarios one by one. Please
+note that this might take some time (~1,5hr), taking around 1 hour alone to
+complete the Nova scenario.
+
+To check any possible problems with Rally, the logs are stored under
+*/home/opnfv/functest/results/rally/* in the Functest Docker container.
+