Prefer using ECDSA over RSA as SSH key type

Change-Id: Ic251440186d57f431d4cb8827115c250c2fc07c8

roles/tests/provision.yaml

@@ -46,25 +46,8 @@
         owner: vagrant
         mode: '0600'
 
-    - name: "generate local SSH key '{{ ssh_key_file }}'"
-      openssh_keypair:
-        path: '{{ ssh_key_file }}'
-        type: rsa
-        size: 4096
-        state: present
-        force: no
-      delegate_to: localhost
-
-    - name: "copy '{{ ssh_key_file }}' file to host"
-      copy:
-        src: '{{ ssh_key_file }}{{ item }}'
-        dest: '/home/vagrant/.ssh/id_rsa{{ item }}'
-        owner: vagrant
-        group: vagrant
-        mode: '0600'
-      loop:
-        - ''
-        - '.pub'
+    - include_role:
+        name: tobiko-ensure-ssh-keys
 
 
 - hosts: all

roles/tests/templates/ssh_config.j2

@@ -7,6 +7,6 @@ Host {{ node.0 }} {{ node.1.hostname }} {{ node.1.ip }}
   User vagrant
   StrictHostkeyChecking no
   UserKnownHostsFile /dev/null
-  IdentityFile ~/.ssh/id_rsa
+  IdentityFile ~/.ssh/id_ecdsa
 
 {% endfor %}

roles/tobiko-ensure-ssh-keys/tasks/main.yaml

@@ -3,8 +3,8 @@
 - name: "generate local SSH key '{{ ssh_key_file }}'"
   openssh_keypair:
     path: '{{ ssh_key_file }}'
-    type: rsa
-    size: 4096
+    type: ecdsa
+    size: 521
     state: present
     force: no
   delegate_to: localhost
@@ -13,7 +13,7 @@
 - name: "copy '{{ ssh_key_file }}' file to host"
   copy:
     src: '{{ ssh_key_file }}{{ item }}'
-    dest: '/home/vagrant/.ssh/id_rsa{{ item }}'
+    dest: '/home/vagrant/.ssh/id_ecdsa{{ item }}'
     owner: vagrant
     group: vagrant
     mode: '0600'