tcwg-cleanup-stale-containers: Add usage

Change-Id: Ie12e9a64a4ed1d21ab9c155c3f263467c950176d

1 files changed, 23 insertions, 1 deletions

diff --git a/tcwg-cleanup-stale-containers.sh b/tcwg-cleanup-stale-containers.sh
index 2ad7c2a0..b605d13d 100755
--- a/tcwg-cleanup-stale-containers.sh
+++ b/tcwg-cleanup-stale-containers.sh
@@ -2,6 +2,28 @@
 
 set -e
 
+usage ()
+{
+    cat <<EOF
+Options:
+  --cleanup-running-hours HOURS
+  --cleanup-stopped-hours HOURS
+	Cleanup running/stopped containers that have been created more
+	than HOURS ago.  Setting HOURS to negative values will
+	run the cleanup in dry-run mode.
+
+  --cleanup-images true/false
+	Whether to cleanup untagged images
+
+  --cleanup-volumes true/false
+	Whether to cleanup dangling volumes
+
+  --verbose true/false
+	Whether to run in verbose mode
+EOF
+    exit 1
+}
+
 cleanup_running_hours="-10"
 cleanup_stopped_hours="-240"
 cleanup_images=false
@@ -15,7 +37,7 @@ while [ $# -gt 0 ]; do
 	--cleanup-images) cleanup_images="$2"; shift ;;
 	--cleanup-volumes) cleanup_volumes="$2"; shift ;;
 	--verbose) verbose="$2"; shift ;;
-	*) echo "ERROR: Wrong option: $1"; exit 1 ;;
+	*) echo "ERROR: Wrong option: $1"; usage ;;
     esac
     shift
 done