Specify hostname for standalone

The standalone must have a fully qualified hostname configured as it can
have issues when deploying with pacemaker managed services.

Change-Id: If7ae3f575238e69bfc8858dd968cf3c69af512ca
Related-Bug: #1814564

roles/standalone/README.md

@@ -17,6 +17,7 @@ Role Variables
 - standalone_network_prefix: <'24'> --  The subnet size for the standalone deployment network
 - standalone_ip: <'192.168.24.1'> --  The IP address of the standalone deployment
 - standalone_interface: <'br-ex'> --  The interface for the standalone deployment
+- standalone_hostname: <'standalone.localdomain'> -- FQDN to use for the system being deployed. Must be a fully qualified hostname with the domain.
 
 - standalone_container_prep_options: <''> -- additional parameters for the container prep command
 - standalone_container_prep_script: <'standalone-container-prep.sh.j2'> -- The script name use to perform container prep actions

roles/standalone/defaults/main.yml

@@ -4,6 +4,7 @@ standalone_network: 192.168.24
 standalone_network_prefix: 24
 standalone_ip: 192.168.24.1
 standalone_interface: br-ex
+standalone_hostname: standalone.localdomain
 
 # container prep script
 standalone_container_prep_options: ''

roles/standalone/tasks/main.yml

@@ -11,6 +11,11 @@
 
 # tasks file for all_in_one
 
+- name: Set hostname
+  hostname:
+    name: "{{ standalone_hostname }}"
+  become: true
+
 # standalone params
 - name: Create the standalone params
   template: