Properly setup hostname

group_vars/sovereign

 # Set your variables here.
 ################################################################################
 
+secret_root: '{{ inventory_dir | realpath }}'
+secret_name: 'secret'
+secret: '{{ secret_root + "/" + secret_name }}'
+
 domain: (required)
-server_fqdn: (required)
+server_name: (required)
+server_fqdn: "{{ server_name }}.{{ domain }}"
+
 main_user_name: (required)
 main_user_shell: "/usr/bin/zsh"
 admin_email: "{{ main_user_name }}@{{ domain }}"

roles/common/tasks/main.yml

 ---
+
+- name: Set hostname
+  hostname: name="{{ server_fqdn }}"
+
+- name: Replace /etc/hosts
+  template: src=etc_hosts.j2 dest=/etc/hosts
+
 - name: Update apt cache
   apt: update_cache=yes
   tags:

roles/common/templates/etc_hosts.j2

+127.0.1.1 {{ server_name }} {{ server_fqdn }}
+127.0.0.1 localhost
+
+::1 ip6-localhost ip6-loopback
+fe00::0 ip6-localnet
+ff00::0 ip6-mcastprefix
+ff02::1 ip6-allnodes
+ff02::2 ip6-allrouters
+ff02::3 ip6-allhosts

roles/common/templates/fqdn.j2

-ServerName {{ domain }}
+ServerName {{ server_fqdn }}