diff --git a/infra/README.md b/infra/README.md
index bedb246e..a9a5d8ff 100644
--- a/infra/README.md
+++ b/infra/README.md
@@ -1 +1,9 @@
 # Private cloud infrastructure
+
+## Kubernetes cluster `./cluster.tf`
+
+Using Rancher Kubernetes Engine, with some config specific to CoreOS
+
+## Bootstrap `./bootstrap.tf`
+
+Install some essential Helm charts (network, storage,...)