create a script that executes at every startup

roles/2-common/tasks/main.yml

@@ -44,6 +44,8 @@
 
 - include_tasks: udev.yml
 
+- include_tasks: iiab-startup.yml
+
 - name: Recording STAGE 2 HAS COMPLETED ==========================
   lineinfile: dest=/etc/iiab/iiab.env
               regexp='^STAGE=*'

roles/2-common/tasks/startup.yml

@@ -0,0 +1,25 @@
+- name: Does systemd startup service exist
+  stat: path="{{ systemd_location }}/iiab-startup.service"
+  register: startup_unit
+
+- name: Copy startup service to /etc/systemd/system
+  template: src=iiab-startup.service
+            dest=/etc/systemd/system/
+  when: startup_unit.stat.exists is defined and not startup_unit.stat.exists
+
+- name: Copy startup script
+  template: src=iiab-startup.sh
+            dest=/usr/libexec/
+  when: startup_unit.stat.exists is defined and not startup_unit.stat.exists
+
+- name: Ask systemd to recognize the changes
+  shell: systemctl daemon-reload
+  when: startup_unit.stat.exists is defined and not startup_unit.stat.exists
+
+- name: Restart so systemd recognizes the changes
+  shell: systemctl restart iiab-startup.service
+  when: startup_unit.stat.exists is defined and not startup_unit.stat.exists
+
+- name: Enable the reload service
+  shell: systemctl enable iiab-startup.service
+  when: startup_unit.stat.exists is defined and not startup_unit.stat.exists

roles/2-common/templates/iiab-startup.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=Execute startup script  
+After=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/libecec/iiab-startup.sh
+
+[Install]
+WantedBy=multi-user.target

roles/2-common/templates/iiab-startup.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# put initialization that needs to happen at every startup for IIAB here
+
+if [ ! -f /etc/iiab/uuid ]; then
+   uuidgen > /etc/iiab/uuid
+fi
+