Add etcd system class

Change-Id: I1dc722bfa4d3b72a941d89e5f85b54b915287f6b
Related-PROD: PROD-23768
diff --git a/etcd/server/cluster.yml b/etcd/server/cluster.yml
new file mode 100644
index 0000000..459d492
--- /dev/null
+++ b/etcd/server/cluster.yml
@@ -0,0 +1,13 @@
+classes:
+- service.etcd.server.cluster
+- service.etcd.support
+- service.etcd.linux
+parameters:
+  _param:
+    docker_image_etcd: quay.io/coreos/etcd:v3.3.8
+  etcd:
+    server:
+      enabled: true
+      image: ${_param:docker_image_etcd}
+      bind:
+        host: ${_param:cluster_local_address}
\ No newline at end of file