preinstall: check etcd_deployment_type (kubernetes-sigs#7149)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -275,6 +275,13 @@
     msg: "The etcd deployment type, 'etcd_deployment_type', must be host or docker"
   run_once: true
 
+- name: Stop if etcd deployment type is not host when container_manager != docker
+  assert:
+    that: etcd_deployment_type == 'host'
+    msg: "The etcd deployment type, 'etcd_deployment_type', must be host when container_manager is not docker"
+  when: container_manager != 'docker'
+  run_once: true
+
 - name: Stop if download_localhost is enabled but download_run_once is not
   assert:
     that: download_run_once