diff --git a/doc/architecture.md b/doc/architecture.md
index 7d36643..96c6918 100644
--- a/doc/architecture.md
+++ b/doc/architecture.md
@@ -175,3 +175,12 @@ Then, other stuff can be started in any order, e.g.:
 - `app/cryptpad`
 - `app/drone-ci`
 
+
+## Operating garage
+
+Garage is operated using its command-line interface, which can be accessed using
+any node of the cluster running garage:
+```
+docker ps  # to find the identifier of the container running garage
+docker exec -ti <id> /garage <cli args...>
+```