Handle existence of dummy interface after reboot

roles/common/handlers/main.yml

@@ -15,10 +15,13 @@
     ifconfig lo100 inet6 FCAA::1/64; echo $?
 
 - name: load dummy
-  shell: modprobe dummy
+  modprobe:
+    name: dummy
+    state: present
+    params: 'numdummies=2'
 
 - name: add dummy
-  shell: ip link add dummy100 type dummy
+  shell: ip link add dummy1 type dummy || /bin/true
 
 - name: restart dummy
-  shell: ifdown --force dummy100 && ifup dummy100
+  shell: ifdown --force dummy1 && ifup dummy1

roles/common/tasks/ubuntu.yml

@@ -44,6 +44,18 @@
   tags:
     - cloud
 
+- name: Use dummy module on startup
+  lineinfile: dest=/etc/modules-load.d/modules.conf line='dummy' state=present create=yes
+  tags:
+    - always
+
+- name: Configure 2 dummies
+  lineinfile: dest=/etc/modprobe.d/dummy.conf line='options dummy numdummies=2' state=present create=yes
+  notify:
+    - load dummy
+  tags:
+    - always
+
 - name: Dummy interface for services configured
   template: src=10-dummy-services.cfg.j2 dest=/etc/network/interfaces.d/10-dummy-services.cfg
   notify:

roles/common/templates/10-dummy-services.cfg.j2

@@ -1,9 +1,9 @@
-auto dummy100
-iface dummy100 inet static
+auto dummy1
+iface dummy1 inet static
 	address {{ local_service_ip }}
 	netmask 255.255.255.255
 
-iface dummy100 inet6 static
+iface dummy1 inet6 static
         address FCAA::1
         netmask 64
         autoconf 0