document how to specify a facet in teuthology-suite

Signed-off-by: Loic Dachary <loic@dachary.org>

diff --git a/scripts/suite.py b/scripts/suite.py
index 3d9ac4e55f6c48d2e57642d3a13d78c3ce7020b5..1842890c5b442ca77e3604242ed2a6660a8333fc 100644 (file)
--- a/scripts/suite.py
+++ b/scripts/suite.py
@@ -12,7 +12,9 @@ facets. A facet is a directory containing config snippets. Running a suite
 means running teuthology for every configuration combination generated by
 taking one config snippet from each facet. Any config files passed on the
 command line will be used for every combination, and will override anything in
-the suite.
+the suite. By specifying a subdirectory in the suite argument, it is possible
+to limit the run to a specific facet. For instance -s upgrade/dumpling-x only
+runs the dumpling-x facet of the upgrade suite.
 
 Miscellaneous arguments:
   -h, --help                  Show this help message and exit