Provide ssh hostkey.

roles/fvs-mount/tasks/main.yml

@@ -33,3 +33,15 @@
         ssh="0" noroot="0"
       ><not><or><user>ansible</user><user>Debian-gdm</user></or></not></volume>
     insertafter: "<!-- Volume definitions -->"
+
+- name: make sure .ssh exists
+  file:
+    path: /root/.ssh
+    state: directory
+    mode: '0700'
+
+- name: provide public key of home server
+  lineinfile:
+    path: /root/.ssh/known_hosts
+    line: "{{ ssh_hostkey }}"
+    create: yes